US1339526A - Printing-machine - Google Patents

Description

D. J. SCOTT AND C. E. DRANGE.

PRINTING MACHINE. APPLICATION FILED SEPT. 29, 1914.

0 m5 m 1 H Lm N K mm NH m D 4. H mm mwfl D. J. SCOTT AND C. E. DRANGE.

PRINTING MACHINE.

APPLICATION FILED SEPT. 29. I914.

Patented May 11, 1920.

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0. I. SCOTT AND 0. E. DRANGE.

PRINTING MACHINE.

APPLICATION FILED SEPT. 29. I914.

Patented May 11,1920.

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A TTORNEY o. J. SCOTT ANDYCLE. DRANGE.

PRINTING MACHINE.

APPLICATION FILED SEPT. 29, 1914.

Patented May 11, 1920.

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N INVENTORS,

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. v BVWZEDWL? ATTORNEY UNITED STATES PATENT oFFIoE.

DAVID JOHN SCOTT AND CARL EBERHARD DRANGE, OF PLAINFIEL'D, NEW JERSEY,

ASSIGNORS TO ISABELLA-SCOTT AND DAVID J. SCOTT, EXECUTORS 0F WALTER SCOTT, DECEASED, LATE 0F PLAINFIELD, NEW JERSEY.

PRINTING-MACHINE.

To all whom it may concern.-

Be it known that We, DAVID JOHN Soo'r'r and CARL E. DRANGE, both citizens of the United States, and residents of Plainfield, in the'county of Union and State of New Jersey, have invented certain new and useful Improvements in Printing-Machines, of which the following is a specification.

The present invention relates to printing machines in which at least one of the printing members partakes of a reciprocating movement either in a rectilinear path or in a curvilinear path, this type being well exemplified by tae ordinary two revolution flat bed machine now so commonly used. The main object of this invention is to produce an improved fiat bed printing machine which is capable of attaining a higher running speed, which is of a more rigid and eflicient construction, and capable of producing a better impression.

The invention consists of the hereinafter described features of construction, combination of parts and arrangement of elements, as set forth in the claims, a preferred embodiment of which is disclosed in the accompanying description and drawings, in which drawings: 7

Figure 1 is a side elevation of a flat bed press embodying the invention, the general framework of the press being indicated in diagrammatic outline.

Fig. 2 is a detail view of the impression bridge and a member passing through the same.

Fig. 3 is a plan view partly in section, showing the bed propelling means, and it may be considered as a section taken on the line 3-3 of Fig. 1 with the bed removed and showing the framework, the tracks on which the bed runs, and other general elements of the machine diagrammatically.

l-to 9 inclusive are diagrammatic views showing the various positions as sumed by the reversing elements during one complete reciprocation of the bed.

Fig. 10 is a diagrammatic view showing the means for reversing the thrust of the reciprocating bed.

Similar characters of reference indicate corresponding parts in the several views.

1 is the impression cylinder mounted in the main frame 2 and driven by the gear 3. The impression cylinder 1 cooperates with Specification of Letters Patent.

Application filed September 29, 1914.

Patented May 11, 1920.

Serial No. 864,119.

the form 1 carried on the type bed 5, and this cylinder is raised and lowered by one of the well-known methods used in such ma chines, the lower position being occupied during a printing stroke while the upper position is taken during the return stroke of the bed 5. 6 is the main driving shaft extending from a point outside the framing to a point underneath the bed, as shown. On its outer end this shaft 6 carries a gear 7 which meshes directly with the large cylinder gear 3. 14. is a reversing shaft or crank shaft also extending from a point outside the framing to a point underneath the bed, as shown, on the end of which is a gear 15 which meshes directly with the gear 7 on the bed driving shaft.

In the form here disclosed the gear 3 makes two revolutions to eachimpression, the gear 7 makes six revolutions to each impression, and the gear 15 makes three revolu'tionsto each impression. Located underneaththe impression member 1 is the impression bridge 32 provided with an opening 10'. On the inner. end of the bed driving shaft 6 is the main stroke gear 8 with'whieh meshes the double-width return stroke gear 10. These two gears are moved sidewise in a well-known manner periodically by means of the yoke 13 actuated by the cam 41. The cam 41 is mounted on'the shaft 410 which makes one revolution to each impression, being driven by means of the gear 411 from pinion 112 on shaft 6. The main stroke gear 8 is continuously in mesh with one of the gears 10 and in addition to this is adapted to engage with the main stroke rack 9 suitably mounted on the bed, the portion of the gear 10 which is not in mesh with the gear 8 being adapted to engage with the main return stroke rack 12 also mounted on the bed. The gear 10 is mounted on a stud 11 as shown. The parts are so arranged that when the gear 8 is in the plane of the rack 9, the gear 10 is out of the plane of the rack 12, and vice versa.

The reversing shaft 14 carries at its inner end double crank arms 16 and 17 connected by a crank pin 18, the structure being preferably integral or in one piece. Connected to the crank pin 18 are two connecting rods 22 and 23' which in turn connect" with the crossheads or reversing members here shown as rectilinearly moving reciprocating racks 24 and 25. These racks slide in the guideways 26 and 27 and the rack 25 further passes through the opening 40 in the impression bridge 32. Mounted on fixed cen ters of rotation, shown here as studs on the framework, are the reversing gears or pin ions 28 and 29. These pinions are oscillated by the racks 24 and 25 and intermittently engage and disengage with the reversing racks 30 and 31 carried by the bed.

The bed preferably runs on an odd number of tracks, in the present instance five,

the center track being marked 35, the two outside tracks 33 and 34, and the two in termediate tracks 36 and 37. It will be noted that in accordance with the preferred embodiment the main bed racks, that is the main stroke rack 9 and the return stroke rack 12, are located on the bed at a point intermediate the central track and the next adjacent track 37, while the reversing racks 30 and 31 are located on the other side of the central track 35 and between it and the next adjacent track 36. To properly cooperate with these parts the. crank 18 and the reciprocating reversing members and other connections are located in the plane of the reversing racks 30 and 31 on one side of the center track 35, while the main and return stroke gears 8 and 10 are located on the other side of the center track 35 and in the plane of the main racks 9 and 12. All four racks face downward whereby is avoided the necessity of having the usual heavy rack hanger employed when oppositely facing racks are used. The two reversing racks 30 and 31 are located one in advance of the other and offset laterally as shown. The reversing shaft 14 has three bearings, one 19 in the main frame, another 20 under the center track and a third 21 under the next adjacent track on the far side from the point where the bearing 19 is located. In this way the crank is supported at both ends very rigidly, giving much greater strength than the single support usually employed. The bed driving shaft 6 is provided with a bearing 42 in the framework and with a bearing 43 under the center track. The stud 11 for carrying the return stroke gear is mounted in two bearings 45 I one under the central track and the other under the next adjacent track on the near side to the point where the bearing 19 is located. It will be noted that there is a direct drive from the bed driving shaft 6 to the impression member, to the reversing shaft, and to the bed so. that very little lost motion takes place. From this it will be seen that the driving shaft 6 has a gear at its outer end which meshes directly with the gear 011 the impression cylinder, and a gear at its other end which meshes directly with the bed. This is the least possible number of gears and insures perfect register during printing. Also, during reversal, the gear on the inner end of the.

shaft 6 drives the bed, while the gear on the outer end of the shaft drives the crank shaft 14, thus insuring perfect timing be:

tween the bed and the reversing means with the weight and thickness of the bed can be reduced, enabling a very low machine to be built and at the same time decreasing the weight of the bed, which of course is an important factor. It will further be noted that the shafts 6, l1 and 14 are located at a point below the top of the bridge and that the reversing member 25 passes through the opening 40 in the bridge 32 so as to reach to the other side and engage the reversing pinion 29. It will be noted that the distance of the crank 18 from the bridge 32 and the length of the connecting rod 23 extending from said crank to the reversing member 25 passing through the bridge 32 is such that the connecting rod 23 is at all times on the same side of the bridge 32 as the crank 18, and consequently the angular elevation or movement of the connecting rod is always on the same side of the bridge. By having all the racks on the bed facing downward the usual heavy rack hanger is no longer needed and the thrust is imparted to the bed ina more direct manner. Furthermore by having separate connections for reversing the bed at each end each connection 22 or 23 can be.

adjusted individually, which is of importance since if the bed reverses perfectly at one end and imperfectly at the otheriend the reversal at one end can be adjusted without interfering with the reversal at the other end. Also by locating the reversing means on one side of the central track 35 and the main' driving elements on the other side of the main track 35, power is applied to move the bed at what is found to be the most effective point since the nearer the center power is applied the easier the bed can be moved. The bed is driven on its uniform printing stroke by the gear 8 meshing with the main rack 9 while on the return stroke the gear 10 engages with the return rack 12 in a well-known manner. At the end of the uniform printing stroke the printing stroke gear 8 runs .out of the.

right-hand end of the printing stroke driving rack 9 at the moment that the reversing rack 31 meshes with the reversing pinion 29 (see Fig.4), at which time the reversing crank 16-17 stands in a vertical positiondirectly above the reversing shaft 14. During the continued rotation of the reversing crank shaft 1 1 in the direction indicated, the bed 5 by means of the connectingrod 28, reversing rack 25 and reversing pinion 29 is gradually reduced in speed until the reversing crank 16-17 stands at the righthand dead center, at which time the bed is at a standstill (see Fig. 5) The continued rotation of the crank shaft 14 reverses the direction of travel of the bed and accelerates it gradually until the moment when the crank 16-17 is standing vertically directly below crank shaft 14: when the bed 5 is traveling at the full surface speed of the return stroke driving gear 10. (See Fig. 6). At this moment the reversing rack 81 runs out of mesh with the reversing pinion 29 and at the same time the return stroke driving gear 10 meshes with return stroke driving rack 12 after which the bed travels at a uniform speed on its return stroke until the return stroke driving gear 10 has reached the left-hand end of the return stroke driving rack 12. At this moment the reversing rack 30 is just starting in to mesh with the reversing pinion 28 and the reversing crank 1617 is standing vertically with the crank pin directly below the crank shaft 1 1 (see Fig. '7). \Vhen in this position the continued rotation of the crank shaft 1 1 through the connecting rod 22, reversing rack 2a and reversing pinion 28 gradually reduces the speed of the bed 5 until the crank pin 18 is at the left-hand dead center (see Fig. 8), at which time the bed 5 has come to a standstill at the extreme right-hand end of the machine. The continued rotation of the crank reverses the direction of movement of the bed and gradually accelerates it until full printing speed is reached, at which time the crank 1617 stands vertically above the reversing crank shaft 14- and the reversing pinion 28 is running out of mesh with the reversing rack 30 while at the same time the printing stroke driving gear 8 is starting to mesh with the printing -stroke driving rack 9. (See Fig. 9).

The reversing members or racks 24- and 25 may be considered as crossheads moved by the crank 16---17 on the crank shaft l l. In a construction of this kind the crosshead moves a distance equal to twice the radius of the crank, while the crank is moving through an arc of 180, that is from one point .in line with the radially moving crosshead on one side of the center of rotation of the crank to the opposite point on the other side of the center of rotation. During the first 90, however, the crosshead moves a greater distance than the radius of the crank, while during" the latter 90 the crosshead moves a lesser distance than the radius of the crank. e have found that the movement of the crosshead during the latter or lagging portion of the rotation of the crank departs but little from a uniform decelerating motion and that therefore the reversal of the bed can be accomplished during this period without subjecting the machine to any undue strain or jar such as is noted in connection with the ordinary so-called harmonic crank reverse in which the greater portion of the reversal of the bed is effected during a very small portion of the movement of the crank. The full theory of this lagging portion of the crank movement is explained in an application filed by us on July 10, 1914, Serial No. 850,101, and need therefore not be re peated here except to state that obviously from the disclosure made the reversal of the bed at each end of the stroke takes place during the lagging portion of the revolution of the crank.

The object of interposing the reversing pinions 28 and. 29 in the train of connections between the reciprocating bed and the crank shaft it can best be understood by a consideration of Fig. 10 in which is disclosed in addition to the reversing elements previously described, the pistons 47 which are carried on the bed and the open ended cylinders 48 which are mounted on the framework. From a consideration of Fig. 10 it will be seen that the thrust of the bed 5 is transmitted through the air cushion formed by the cylinder 41-8 and piston 17 to the framing 2 of the machine, the said thrust being in the same direction as the movement of the bed. In order to counterbalance this thrust and to minimize the lurch which ordinarily takes place in machines of this character during each reversal, it will be noted that the reversing rack 31, for instance, is engaged with the reversing pinion 29, and inasmuch as this reversing pinion 29 is mounted on a fixed center of rotation so that it merely oscillates without having any rolling motion imparted to it, it transmits the thrust received from the rack 31 to the reversing member 25, which latter in turn transmits the thrust through the connecting rod 23 to the crank Y pin 18 but in a direction opposite to that of the movement of the bed. In this connection it will be noted that during the deceleration of the bed the crank pin 18 is t 'aveling in a direction opposite to that of the bed 5.

It will be evident that by the foregoing construction the speed of presses of the flat bed type can be greatly increased because the deceleration of the bed takes place at a decreasing ratio which departs but little from a uniform deceleration and because the thrust of the bed during reversal is trans mitted to the press in opposite directions it is counterbalanced so that no lurching takes place. Also the exceedingly substantial structure made possible by the high bridge, as well as the lightness of the reciprocating bed, the absence of heavy rack hangers and the direct and balanced application of power to the bed produces a very high degree of compactness and eiliciency and also admits of a low-down construction of bed.

W hat is claimed, is:

l. A printing machine comprising: an impression member, a flat bed form mem her, an impression bridge located under the impression member and having an opening therein, reciprocating reversing members moving independently of the bed, one of said members passing through the opening in the bridge, a crank on one side of the bridge whose center of rotation is below the top thereof, connecting rods between the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the connecting rod is at all times on the same side of the bridge as the crank, and connecting means between the reciprocating reversing members and the bed.

2. A printing machine comprising: an impression member, a flat bed form member, an impression bridge located under the impression member and having an opening therein, reciprocating reversing members moving independently of the bed, one of said members passing through the opening in the bridge, a crank on one side of the bridge whose center of rotation is below the top thereof, connecting rods between the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the angular elevation of the connecting rod takes place on that side of the bridge on which the crank is located, and connecting means between the reciprocating reversion members and the bed A printing machine comprising: an impression member, a flat bed form member, an impression bridge located under the impression member and having an opening therein, reciprocating reversing members moving independently of the bed, one of said members passing through the opening in the bridge, means located on one side of the bridge and below the top thereof for actuating both reciprocating reversing members, connecting means between the reciproeating reversing members and the bed, and a bed driving shaft located intermediate the bridge and the actuating means and adapted to drive said bed and said actuating means.

bridge whose center of rotation is below the top thereof, connecting rods between the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the connecting rod is at all times on the same side of the bridge as the crank, and a bed driving shaft located intermedi ate the bridge and the crank and adapted to drive said bed and said actuating means.

5. A printing machine comprising: an im pression member, a flat bed form member, an impression bridge located under the impression member and having an opening therein, reciprocating reversing members moving independently of the bed, one of said members passing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, a crank on one side of the bridge'whose center of rotation is below the top thereof,

connecting rods between the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the connecting rod is at all times on the same side of the brid 'e as the crank a bed drivin D 7 shaft located intermediate the bridge and the crank, a gear on the bed driving shaft making sir; revolutions to each impression, a gear on the impression member making two revolutions to each impression and meshing with the gear on the bed driving shaft, and a gear rotating with the crank making three revolutions to each impression and also meshing with the gear on the bed driving shaft.

6. A printing machine comprising: framing, an impression member, a reciprocating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the framing to a point underneath the bed, tracks underneath the bed on which the lat ter reciprocates, a crank on the inner end of the bed reversing shaft, a bearing in the framing, and two bearmgs underneaththe tracks on opposite sides of the crank for the support of said reversing shaft and crank, bearings in the framing and underneath the tracks for supportlng thebed drlvmg shaft, andmeans for reciprocating and reversing the bed from the said driving shaft and crank.

T. i printing machine comprising: framing, an impression member, a reciprocating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the framing to a point underneath the bed,

tracks underneath the bed on which the latter 'IQCIPIOCZLtQS, a crank on the inner end of the bed reversing shaft, a bearing in the framing, two bearings underneath the tracks on opposite sides of the crank for the support of said reversing shaft and crank, bearings in the framing and underneath the tracks for supporting the bed driving shaft, vmeans for reciprocating and reversing the bed from the said driving shaft and crank, a gear on the outer end of the bed driving shaft, and a gear both on the im pression member and on the reversing shaft meshing with the said gear on the bed driv ing shaft.

8. A printing machine comprising: framing. an impression member, a reciprocating bed, a bed driving shaft and a bedreversing shaft both extending from a point outside the framing to a point underneath the bed, an odd number of tracks underneath the bed on which the latter reciprocates, a crank on the inner end of the bed reversing shaft, three bearings for said reversing shaft, one in the framing,one underthe center trackand one under the next adjacent track on the far side from the bearing on the framing whereby to support said crank on opposite sides, bearings in the framing and underneath the center tr ck for supporting the bed driving shaft, and means for reciprocating and reversing the bed from the driving shaft and said crank.

9. A printing machine comprising: framing, an impresssion member, a reciprocating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the framing to 'a point underneath the bed, an odd number of tracks underneath the bed on which the latter reciprocates, a

crank on the inner end of the bed reversing shaft, three bearings for said shaft, one on the framing, one under the center track and one under the next adjacent track on the far side from the bearing in the framing n-liereby to support said crank on opposite sides, bearings in the framing and underneath "the center track for supporting the bed driving shaft, means for reciprocating and reversing the bed from the driving shaft and said crank, a gear on the outer end of the bed driving shaft, and a gear both on the impression member and on. the bed reversing shaft meshing with said gear on the bed driving shaft.

10. A printing machine comprising: framing, an impression member, a reciprocating bed, a bed driving shaft and a bed underneath the bed, tracks underneath the bed on which the latter reciprocates, a crank on the inner end of the bed reversing shaft, a bearing in the framing, and two bearings underneath the tracks on opposite sides of the crank for the support thereof and of said reversing shaft, bearings in the framing and underneath the tracks for supporting the bed driving shaft, bearings underneath the tracks for supporting the return stroke shaft, and means for reciprocating and reversing the bedfrom said shafts.

11. A printing machine comprising: framing, an impression member, a reciprocating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the framing to a point underneath the bed, a main stroke gear on said bed driving shaft, a return stroke shaft driven from said bed driving shaft located underneath the bed, tracks underneath the bed *on which the latter reciprocates, a crank-on the inner end of the bed reversing shaft, a bearing in the framing and two bearings underneath the tracks on opposite sides of the crank for the support thereof and of said reversing shaft, hearings in the framing and underneath the tracks for supporting the bed driving shaft, bearings underneath the tracks for supporting the return stroke shaft, means for reciprocating and reversing the bed from said shafts, a gear on'the outer end of the bed driving shaft, and a gear both on the impression member on the bed reversing shaft meshing with said gear on the bed driving shaft.

1 A printing machine comprising: framing, an impression member, a reciprocating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the framing to a point underneath the bed, a return stroke shaft driven from the bed driving shaft located underneath said bed, an odd number of tracks underneath the bed on which the latter reciprocates, a crank on the inner end of the bed reversing shaft, three bearings for said shaft, one on the framing, one under the center track and one underthe next adjacent track on the far side from the bearing in the framing whereby to support said crank on opposite sides, bearings in the framing and underneath the center track for supporting the bed driving shaft, bearings under the center track and under the next adjacent track on the near side from the bearing in the framing for supporting the return stroke shaft, and means for reciprocating and reversing the bed from said.

shafts,

13. A printing machine comprising: framing, an impression member, a reciproeating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the framing to a point underneath the bed, a return stroke shaft driven from the bed driving shaft located underneath said bed, an odd number of tracks underneath the bed on which the latter reciprocates, a crank on the inner end of the bed reversing shaft, three bearings for said shaft, one on the framing, one under the center track and one under the next adjacent track on the far side from the bearing in the framing whereby to support said crank on opposite sides, hearings in the framing and underneath the center track for supporting the bed driving shaft, bearings under the center track and under the next adjacent track on the near side from the bearing in the framing for supporting the return stroke shaft, means for reciprocating and reversing the bed from said shafts, a gear on the outer end of the bed driving shaft, and a gear both on the impression member and on the bed reversing shaft, meshing with said gear on the bed driving shaft.

14. A bed motion for printing machines comprisin a reciprocating bed, an odd number of tracks on which the bed reciprocates, a reversing crank 011 one side of the center track, main and returnstroke gears .on the other side of the center track, means for driving said gears for effecting reciprocatlon of the bed, and means for driving said crank to effect reversal of the bed, and

means for driving said last-named means,

said means being driven from said gear driving means.

15. A bed motion for printing machines comprising: a reciprocating bed, an odd number of tracks on which the bed. reciprocates, two down facing main racks on the bed on one side of the center track, two down facing reversing racks also on the bed on the other side of the center track, a crank disposed in the plane of the reversing racks, reversing members driven from said crank, a shaft for driving said crank, reversing pinions fixedly mounted relative to said tracks and engaging the reversing members and the reversing racks, main and return stroke gears underneath the bed in the plane of the main and return stroke racks, and a second shaft for supporting and driving the said main and return stroke gears.

16. A printing machine comprising: co operating printing members, one of which has a reciprocating movement,sliding crossheads for reversing the movement of the printing member, crank means, and connections between the crank means and the slid ing crossheads, said crank means, crossheads and connections being so constructed, timed and connected to each other that each crosshead during the reversal of the reciprocating printing member is nearest to the center of rotation of the crank means substantially at the moment of reversal of the printing member.

17. A printing machine comprising: cooperating printing members, one of which has a reciprocating movement sliding crossheads for reversing the movement of the printing member, crank means, and connec tions between said crank means and the s1iding crossheads, said crank means, crossheads and connections being so constructed, timed and connected to each other that the crank means durin the reversal of the printing member at each end of its stroke passes through that are of its movement on that side of its center of rotation which is op posite to the side on which the sliding-cross head which is effecting the reversal of the reciprocating printing member is located.

18. A printing machine comprising: cooperating printing members, one of which has a reciprocating movement, a crank op eratively included in. the machine, two connecting rods extending from said crank and so related thereto that when the crank imparts its gaining effective movement to one connecting rod its lagging effective move ment is imparted to the other connecting rod and vice versa, and areciprocating reversing member connected to each connecting rod constructed, timed and arranged to reverse the movement of the bed during a period when its connecting rod has imparted to it the lagging effective movement of the crank. r

19. A counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, reversing racks carried thereby, a reversing crank, reciprocating reversing members connected to said crank, and oscillating gears having a fixed center of rotation interposed between the reversing members and the reversing racks.

20. A printing machine comprising: cooperating prii'ltiug members, one of which has a reciprocating movement, crank means operatively included in the machine, means for transmitting a portion of the thrust of the reciprocating member to the crank means in a direction opposed to the direction of travel. of the recipr eating member during each reversal of the reciprocating member at each end of its stroke, said means including devices connecting the reciprocating print-- ing member and crank for effecting the re versal of the movement of the former at each end of its stroke at a lagging crank ratio.

2i. A printing machine comprising: cooperating printing members, one of which has a reciprocating movement, crank means operatively included in the machine, connecting means between the crank means and the reciprocating member for effecting the reversal of the movement of the latter at each end of its stroke at a lagging crank ratio, said connecting means including devices for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the crank meansin a direction opposite that of the direction of nnnen'n-z-nt of the reciprocating member.

22. A printing machine cmnprising: cooperating printing members, one of which has a reciprocating movement, reciprocating reversing means for reversing the movement of the reciprocating printing member, crank means for driving said reversing means, connecting means between said crank and reversing means so constructed and timed with relation to the crank andreversing means that the. crank means during the reversal of the printing member at each end of its stroke passes through that are of its movement on that side of its center of rotation which is opposite to the side on which the active reversing means is located, said connecting means including devices for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in a direction opposite to that of the direction of movement of the reciprocating member.

A printing machine comprising: cooperating printing members, one of which has a reciprocating movement, reciprocating reversing means for reversing the movement of the reciprocating printing member, crank means for driving said reversing means, connecting means between said crank and reversing means SO COIlStIUCtGCi and timed with relation to the crank and reversing means that the cran means during the versal of the printing member at each end of its stroke passes through that are of its movement on that side of its center of rotation which is opposite to the side on which the active reversing means is located, means driven by said reversing means for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in a direction opposite to thatyof the direction of movement of the reciprocating member, and means for receiving the direct thrust of the bed during its reversal at each end of its stroke.

24. A. printing machine comprising: cooperating printing members, one of which has a reciprocating movement, a crank op eratively included in the machine, two connecting rods extending from said crank. and so related thereto that when the crank imparts its gaining effective movement to one connecting rod its lagging effective movement is imparted to the other of said connecting'rods and vice versa, a reciprocating reversing member connected to each 0011- necting rod arranged to reverse the movement of the bed during a period when its connecting rod has imparted to it the lag erating said reversing means the direction 7 V of movement of which 1s opposite that of the reciprocating member, whereby the thrust of the reciprocating member is transmitted to the framework in opposed directions durmg each reversal. of the reciprocating member at each end of its stroke.

26 A printing machine comprising: an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bedon one side of the center track, two down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing members moving independently of said bed in. the planes of the reversing racks, one of said members passing through the opening in'the bridge connecting means between the reciprocating reversing membe s and the bed, and means located on one side of the bridge and below the top thereof for actuating both reciprocating reversing members.

27. A printing machine comprising: an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two

down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing member's moving independently or said bed in the planes of the reiersing racks, one of said members pass ing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, a crank on one side of the bridge whose center of rotation is below the top thereof and arranged on the same side of the center track as the reciprocating reversing members, connecting rods between the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the connecting rod is at all times on the same side of the bridge as the crank.

28. A printing machine comprising: an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing members moving independently of said bed in the planes of the reversing racks, one of said members passing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, a crank on one side of the bridge whose center of rotation is below the top thereof and arranged on the same side of the center track as the reciprocating reversing members, connecting rodsbetween the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the angular elevation of the connecting rod takes place on that side of the bridge on which the crank is located.

29. A printing machine comprisin an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing members moving independently of said bed in the planes of the reversing racks, one of said members passing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, means located on one side of the bridge and below the top thereof for actuating both reciprocating reversing members, and a bed driving shaft for operating the main and return stroke gears located intermediate the bridge and the actuating means.

30. A printing machine comprising: an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two

mg means between the reciprocating reversing members and the bed, means located on one side of the bridge and below the top thereof for actuating both reciprocating reversing members, a bed driving shaft for operating the main and return stroke gears located intermediate the bridge and the actuating means, and means for driving the impression member and actuating means from said driving shaft.

31. A printing machine comprisin an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing members moving independently of said bed in the planes, of the reversing racks, one of said members passing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, a crank on one side of the bridge Whose center of rotation is below the top thereof and arranged on s reiversin member assin throu h the b p 7 b b bridge being such that theconnecting rod is at all times on the same side of the bridge as the crank, and a bed driving shaft for operating the main and return stroke gears located intermediate the bridge and the crank.

32. A printing machine comprising: an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two. down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing members moving independently of said bed in the planes of the reversing racks, one of said members passing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, a crank on one side of the bridge whose center of rotation is below the top thereof and arranged on the same side of the center track as the reciprocating reversing members, connecting rods between the crank and the reciprocatingreversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the connecting rod is at all times on the same side of the bridge as the crank, a bed driving shaft for operating the main and return stroke gears located intermediate the bridgeand the crank, and means for driving the impression member and the crank from the driving shaft.

33. A printing machine comprising: an impression member, a reciprocating bed, an odd number of tracks on which the bed reciprocates, two down facing main racks on the bed on one side of the center track, two down facing reversing racks also on the bed on the other side of the center track, an impression bridge located under the impression member and having an opening therein, main and. return stroke gears underneath the bed in the planes of the main racks, reciprocating reversing members moving independently of said bed in the planes of the reversing racks, one of said members passing through the opening in the bridge, connecting means between the reciprocating reversing members and the bed, a crank on one side of the bridge whose center of rotation is below the top thereof and arranged on the same side of the center track as the reciprocating reversing members, connecting rods between the crank and the reciprocating reversing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the bridge being such that the connecting rod is at all times on the same side of the bridge as the crank, a bed driving shaft for operating the main and return stroke gears located intermediate the bridge and the crank, a gear on the bed driving shaft making six revolutions to each impression, a gear on the impression member making two revolutions to each impression and meshing with the gear on the bed driving shaft, and a gear rotating with the crank making three revolutions to each impression and also meshing with the gear on the bed driving shaft.

34. A printing machine comprising: an impression member, a reciprocating bed, a bed driving shaft and a bed reversing shaft both extending from a point outside the bed to a point underneath the bed, a gear at the outer end of the bed driving shaft, a gear on the impression member and a gear by the reversing shaft for effecting the reversal of the bed at each end of its stroke.

35. A printing machine comprising: an impression member making two revolutions to each impression, a reciprocating bed, a bed driving shaft and a bed reversing shaft,

the former making six revolutions and the latter three revolutions to each impression, both extending from a point outside the bed to a point underneath the bed, a gear at the outer end of the bed driving shaft, a gear on the impression member and a gear on the reversing shaft both meshing with the outer gear on the bed driving shaft, main and return stroke racks on the bed, a gear on the inner endof the bed driving shaft meshing with the main' stroke rack, a gear meshing with the innergear on the bed driving shaft and adapted to engage with the return stroke rack, and means actuated by the reversing shaft for effecting the reversal of the bed at each end of its stroke.

36, A counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, means for effecting the main reoiprocation'of said member, a controlling member independent of the means for effecting the main reciprocation of the reciprocating member for effecting the reversal of said reciprocating member, and means vfor transmitting the thrust "ofthe reciprocating member during the reversal at each end of its stroke to the controlling member in a direction opposite to that of the direction of movement of the reciproeating member.

37. A counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, means for effecting the main reciprocation of said member, a reversing crank opera'tively included in said mechanism but independent of the means for effecting the main reciprocation of the reciprocating member, and means for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in a direction opposite to that of the direction of movement of the reciprocating member.

38. A counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, means for effecting the main reciprocation of said member, a reversing crank independent of the means for effecting the main reciprocation of the reciprocating member traveling during the period of reversal of the reciprocatingmember in a direction opposite to that of the reciprocating member, and means for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in the same direction as the direction of movement of said crank.

39. A counterbalanced reversing mechanism for printing machines comprising: a framework, a reciprocating member, means for effecting the main reciprocation of said member, and means independent of the means for effecting the main reciprocation of the reciprocating member and movable in directions reverse to the direction of movement of the reciprocating member for transmitting the thrust of the reciprocating member to the framework in opposite directions during each reversal of the recipro eating member at each end of its stroke.

40. A counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, a reversing. crank for effecting the reversal of the reciprocating member, and means for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in a direction opposite to that of the direction of movement of the reciprocating member.

41. A counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, a reversing crank traveling during. the period of reversal of the reciprocating member in a direction opposite to that of the reciprocating member, and means for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in the same direction as the direction of movement of said crank. I

' 42. A counterbalanced reversing mechanism for printing machines comprising: a framework, and means engaging the reciprocating member at the ends of its path of travel for transmitting the thrust of the reciprocating memberto the framework in opposite directions during each reversal of the reciprocating member at each end of its stroke. 7

431 A. counterbalanced reversing mechanism for printing machines comprising: a reciprocating member, 'areversing crank operatively included 7 in said mechanism, means for transmitting the thrust of the reciprocating member during the reversal at each end of its stroke to the reversing crank in a direction opposite to that of the direction of movement of the reciprocating mem her, and means for receiving the direct thrust of the bed during its reversal at each end of its stroke. V

44. A counterbalanced reversing mecha nism for printing machines comprising: a reciprocating member, a reversing crank traveling during the period of reversal of ceiving the direct thrust of the bed during" its reversal at each end of its stroke.

45. A counterbalanced reversing mecha nism for printing machines comprising: a reciprocating member, reversing racks car ried thereby, a reversing crank, reciprocating reversing members connected to said crank, and oscillating gears having fixed centers of rotation interposed between the reversing members and the reversing racks, aid reversing crank being located intermediate said gears.

46. A counterbalanced reversing mechanism for printing machines comprising: a framework, a reciprocating member, means adjacent each end of the path of travel of the reciprocating member for reversing the direction of travel of said member, and driving means for said reversing means mounted in the framework intermediate the reversing means, said reversing means being adapted to transmit a portion of the thrust of said reciprocating member through the a driving means to the framework in a direction opposed to the direction of travelrof said reciprocating member, whereby the thrust of the reciprocating member is counterbalanced.

47. A counterbalanced reversing mechanism for printing machines comprising: a framework, a reciprocating member, means for reversing the direction of movement of the reciprocating member at one end of its path of travel, means spaced from said firstnamed means for reversing the direction of movement of the reciprocating member at the other end of its path of travel, driving means for said reversing means mounted in the framework intermediate said reversing means, and means connecting said driving means to each of said reversing means, said reversing means being adapted to transmit a portion of the thrust to the reciprocating member through the connecting means and the driving means to the framework in a direction opposed to the direction of move ment of said reciprocating member, where by the thrust of the reciprocating member is counterbalanced.

48. A counterbalanced reversing mechanism for printing machines comprising: a framework, a reciprocating member, a reversing rack mounted on the reciprocating member adjacent each end thereof, a pinion fixedly mounted in the framework and cooperating withone of said racks to reverse the reciprocating member at one end ofpits direction of travel, another pinion spaced from the first-named pinion and cooperating with the other rack to reverse the recip rocating member at the end of its direction of travel, and driving means for the pinions mounted in the framework intermediate the pinions, said pinions being adapted to transmit a portion of the thrust of the reciprocating member through the driving means to the framework in a direction opposed to the direction of movement of said reciprocating member, whereby the thrust of the reciprocating member is counterbalanced.

49. A counterbalanced bed reversing mechanism comprising: a framework, a reciprocating bed, means for directing a portion of the thrust of the reciprocating bed in a direction counter to the direction of movement of the reciprocating bed during its reversal including: rotating reversing means, reciprocating reversing means and oscillating reversing means; and means for receiving the direct thrust of the reciprocating bed during its reversal.

50. A counterbalanced bed reversing mech anism comprising: a framework, a reciprocating bed, means for directing a portion of the thrust of the reciprocating bed in a direction counter to the direction of move ment of the reciprocating bed during its reversal including: a rotating crank, reciprocating means connected with said crank and oscillating gears engaging the reciprocating means and the reciprocating bed; and means for receiving the direct thrust of the bed during its reversal.

51. A counterbalanced bed reversing mechanism comprising: a framework, a reciprocating bed, means for directing a portion of the thrust of the reciprocating bed ina direction counter to the direction of movement of the reciprocating bed during its reversal including: reciprocating means having a greater number of reciprocations during each cycle of the machine than has the reciprocating 'bed, and means for so connecting said means and bed, during reversal of the bed, that they are traveling in opposite directions, and means for receiving the direct thrust of the bed during its reversal.

52. A counterbalanced bed reversing mechanism comprising: a framework, a reciprocating bed, means for directing a portion of the thrust of the reciprocating bed in a direction counter to the direction of movement of the reciprocating bed during its reversal including: rotating means, reciprocating means connected with said rotating means, and having a greater number of re ciprocations during each cycle of the machine than has the reciprocating bed, and oscillating gears for so connecting said reciprocating means and bed, during reversal of the bed, that they are traveling in opposite directions, and means for receiving the direct thrust of the bed during its reversal.

Signed at Plainfield, in the county of Union and State of New Jersey this 26th day of September A. D. 1914.

DAVID JOHN SCOTT. CARL EBERHARD DRANGE.

Witnesses J. V. (Jones, J. "W. DICKINSON.

It is hereby certified that in Letters Patent No. 1,339,526, granted May 11, 1920, upon the application of David John Scott and Carl Eberhard Drange, of Plainfield, New J ersey, for an improvement in Printing-Machines, an error appears in the printed specification requiring correction as follows: Page 8, claim 31, strike out lines 108411, both inclusive, and insert the words rerersing members, the distance of the crank from the bridge and the length of the connecting rod extending from said crank to the reversing member passing through the; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 31st day of August, A. D., 1920.

M. H. coULsT oN, Acting Commissioner of Patents.

[SEAL]

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