US2253120A - Printing press - Google Patents

Description

Aug. 19, 1941 W. H. GRANGER PRINTING PRESS 3 Sheets-Sheet l Filed March 7, 1940 Allg. 19, 1941. W, H @RANGER 2,253,120

PRINTING PRESS Filed March 7, 1940 3 Sheets-Sheet 2 3 Sheeyts-Sxeet 3 PRINTING PRESS W. H. GBANGER Filed March '7, 1940 Aug. 19, 1941.

Patented Aug. 19, 1941 PRNTING PRESS Wallace lil. Granger, San Francisco, Calif., as-

signor to The Duplex Printing Press Company, Battle Creek, Mich., a corporation of Michigan Application March 7, 194%, Serial No. 322,791

(Cl. lill-256) 13 Claims.

This invention is a novel improvement in flatbed travelling cylinder printing presses having stationary beds for the type forms and impression cylinders mounted in cross-heads travelling back and forth over the beds. Such presses have heretofore been designed to print on one stroke only of the cylinder over the form, the cylinder being raised out of printing contact with the bed` on the reverse stroke; also such presses have been designed to print on both strokes.` A twoway press will obviously deliver a greater product than a one-way press, but the printing section of a two-way press will loe somewhat longer than that of a one-way press, due to the requisite additional inking fountains and mechanism, necessitating a longer stroke of the cylinder crossheads.

Heretofore, when the output from a-one-Way press became too small for the owner of such press, the owner would be forced to purchase and install an entirely new and larger press, replacing the smaller press. Even if the discarded one-way press was in good `mechanical condition `and not approaching obsolescence, the replacement would involve a loss in the trade-in value thereof in vide a press of the above type built in sectional units, one `unit comprising a paper feeding and delivery section, another unit comprising the printing section of a one-way press; and a further unit comprising the printing section ofa twoway press, the two printing units being interchangeably connected with the paper feeding and delivery unit, whereby the owner of a one-way pressiconstructed according to my invention,` Whose circulation requirements has increased sufciently to justify almachine of greater output, can secure this result by merely replacing the one-way printing unit of his press with a twoway printing unit, joining the new unit to the original paper feeding and delivery unit in the same identical manner 'and by the same means that the one-way unit was `secured thereto.

`A further object of the invention is to provide each printing unit with cross-head driving mechanism disposed under the unit to facilitate interchangeability, the driving mechanism for each printing unit being made either as a separate section bolted to the underside of the printing f unit for the sake of simplicity in erection of the press, or made as an integral part of the printing unit; and the driving mechanism of each printing unit comprising means for reciprocating its respected cross-head, and including a driven gear adapted to mesh directly with a gear on a shaft carried by the paper feeding and delivery unit to which the printing unit is coupled, to operate the paper feeding and delivery rolls in timed rela-- tion with respect to the movement of the crosshead, the gear of the driving mechanism for the two-way printing unit rotating said shaft of the paper feeding and delivery rolls twice as fast as that of the one-way section.

Other minor objects of the invention will be hereinafter set forth.`

I will explain the invention withreference to the accompanying drawings which illustrate one practical embodiment thereof to enable others familiar with the art to adopt and use the same; and will summarize in the claims, the novel features of construction, and novel combinations of parts, for which protection is desired.

In said drawings:

Fig. 1 is a side elevation of a press showing the paper handling unit coupled with a` one-Way printing unit, and showing gear of the driving mechanism for the cross-heads of the printing unit meshing with the gear in the drive shaft of the paper handling unit which operates the paper feeding and delivery rolls thereof.

Fig. 2 is a vertical transverse section on the line 2 2, Fig. 1.

Fig. 3 is an elevation` similar to Fig. 1, but showing the one-way printing unit replaced by a two-way printing unit, the paper handling unit remaining unchanged. i

As shown in Figs. 1 and 2, the press is preferably built in units, unit A comprising the paper feeding and delivery section; and unit B, detachably connected therewith, comprising the printing section. There may also be the custom-` ary paper folding section (not shown) connected for operation with the paper feeding and delivery unit A, but the folding section forms nov part of my present invention.

Unit A comprises side frames i, in which is journaled the axle 2 supporting the web roll W. In said frames `adjacent rollW is a feed roll 3 for web w above which is journaled a web delivery roll li, the shafts of rolls 3 and 4 carrying sprockets 3a and 4a around which runs a chain 5 to drive the rolls 3 and 4 in unison, On the end of the shaft of delivery rollll vis a beveled gear meshing with a beveled gear 'l on a downwardly inclined drive shaft 8, journaled in any desired manner on side frames I, and carrying a beveled gear 9 at its lower end which overlaps the driving mechanism of the printing unit. Also journaled in side frames I are equalizing rolls I and II revolving around driven shafts I2 and I3 having gears I2a. and I 3a thereon meshing with an intermediate gear I4, whereby the shafts are driven in unison. On the shaft I3 is the beveled gear l5 meshing with a beveled gear I6 on the inclined drive shaft 8, for the purpose of driving the equalizing rolls by and with the movement of the feed and delivery rolls 3 and 4.

The one-way printing unit B preferably comprises side frames I1 forming continuations of the side frames I, same being adjustably connected therewith in any desired manner such as by bolts connecting their meeting faces. In side frames I'I are mounted the lower and upper flat type beds I 8 and I9. In the sides of frames I7 are guide slots for the reciprocating crossheads 2| which carry the respective impression cylinders 22 and 23 which lcoact with the beds [Band I 9, Cross-heads 2l also carry the respective sets of inking rolls 24 and 25 for the beds, said rolls being applied with ink from fountains 26 and 21 arranged at the adjacent end of the 'unit B in the customary manner. The particular construction and yarrangement of the inking rolls and fountains form no part of my present invention.

Cross-heads 2| are provided with offset extensions at theirlower ends operating in a pit P disposed below the main floor level F of the press. Integralv with or detachably attached to the undersides of frames I1 are the frame extension members 28 of the driving'mechanism also `disposed/in the pit P. Journaled in extension members 23 is a crank shaft 29 disposed below the beds I8 and I9, said shaft carrying Crankarms 3i) disposed intermediate the outer faces of member l28 and the offset lower eXtensions of the cross-heads 2I as indicated in Fig. 2.

Each crank arm 30 carries a crank pin 3| operating ina vertically disposed slot 32 in the crossliead 2l forming -a Scotch-yoke drive for the cross-head. Preferably the inner end of each crank arm 3'3 is weighted as at-33 to counterbalance same. i Also journaled in extension members 28 isa drive shaft 34 which is driven in any rsuitable manner from a prime mover (not shown) preferably also disposed in pit P, said shaft 34 carrying a pinion 35 meshing with a gear 3?, on the crank shaft 29 for imparting rotationto the arms 3i). Journaled in extension members 28 adjacent the beveled gear 9 of sli-aft 8 is a shaft 31 carrying on its yend a bevel gear 38 directly meshing with said bevel gear 9. Shaft3'l also carries a gear 39 meshing with an idler `gear Mon a-shaft 4I journaled in the Iriernbers'Z-B,l which idler 4U also meshes with the pinion 35 on drive shaft 34.

By'the above construction, drive shaft 3.43 will actuate the crank shaft 29, through gears 35 and 36,'to impart reciprocatory motion to crossheads 2|. Drive shaft 34 4will also simultaneously rotate the inclined drivev shaft 8 of the feed andV delivery rolls 3 and 4 of the paper handling unit A, through the gears or pinions 35j4tl, 39, 33 and 9, andy thus when the press shown in Figs. 1 and 2 is in operation, the paper web w` from roll W will be fed over suitable guide and' looping rollers to and between the feed roll 3 andiits cooperating roll; from thence under suitable guide rolls to and over the lower equalzer roll II, from thence over or under suitable guide rolls to and between the lower impression cylinder 22 and its rel-ated bed I 8 from thence over suitable guide rolls to and under the upper impression cylinder 23 and its related bed I9. From thence the web passes by means of suitable guide rolls to and under the upper equalizer roll I U, to and between Ythe delivery roll 4 and its cooperating roll, and from thence around suitable angle bars at the top of section A to the folding unit (not shown). Since the printing unit B shown in Figs. 1 'and 2 is a one-way press, printing will be effected during only one stroke of the cross-heads 2|, the impression Icylinders being held raised in its usual manner out of printing contact with the beds on the reverse stroke.

When the press output, using the one-way printing unit B` (Figs. 1 and 2) becomes too small, and a two-way printing unit would fulll circulation requirements, the owner may discard the one-way printing unit B and insert in place thereof the related two-way printing unit C shown in Fig. 3, utilizing however the same paper feedand delivery unit A (and the same folding section). Obviously a. two-Way press will deliver greater volumes than a one-way press. This procedure obviates the necessity on the part of the press owner of having to purchase and install anentirely new larg-er press, and further obviating the loss in trade-in value of the one-way press, and saving the time and cost required to dismantle the one-way press and install the larger one, plus the possible expense of having his product furnished by others during such installation.

As shown in Fig. 3, the two-way printing unit C is generally similar in construction and arrangement to the one-way printing unit B, but

obviously unit C is slightly longer because of the needed additional inking mechanism, necessitating a somewhat longer stroke of the Ycross-head.

The two-way printing unit C (Fig. 3) preferably comprises side Vframes I 1a adapted to form continuations of the side frames I of the paper feed and delivery unit A which latter is the same identical unit as shown in Fig. 1. Frames I 'la support the lower type bed I8@ and upper bed I 9a, and are provided with guide slots 28a for the cross-heads 2m, which latter carry the lower impression cylinder 22a and the upper impression cylinder 23a also the lower and upper sets of inking rollers 24a. and 25a mounted in the cross-heads at each side (instead of one side .i only) of the respective impression cylinders 22a and 23a. Inking fountains 26a, 27a are mounted at each end of the unit C for supplying ink to the lower and upper linking rollers 24a, 25a.

Frame extensions 28a for the unit driving mechanism are provided on the undersides of the frames I'Ia, the same being either integral with frames Ha, or detachably secured thereto in any desired manner, and extending down into pit P into which the lower offset ends of the cross-heads 2|a also project. Crank shaft 29a.

is mounted in the frame extensions 28a and 'carries the crank arms 30a provided with crank pins 3Ia operating in the vertical slots 32a in the cross-heads 2Ia., forming .a Scotch-yoke drive for said cross-heads. Drive shaft 34a is likewise journaled in the frame extensions 28a and carries a pinion 35a meshing with a gear 36a on crank shaft 29a for imparting rotation to said arms to reciprocate the cross-heads. A shaft 37a is mounted in the frame extensions 28a amd carries a bevel gear 38a directly meshing with the bevel gear 9 at the lower end of shaft 8 which actuates the paper feed and delivery rolls 3 and 4 of unit A. Shaft B and beveled gear 9 are identical in both Figs. 1 and 3, both being directly used in connection with the oneway and two-Way printing units B and C. Shaft 31a carries a pinion 39a meshing with the intermediate gear 46a on shaft Ma, which gear also meshes with pinion 35a on drive shaft 34a.

In the two-way press shown in Fig. v3, shaft 8 of the paper feed and delivery unit A must obviously be driven twice as fast as when the one-way printing unit B (Figs. 1 and 2) is in use. This is conventiently accomplished by selection of the proper size of gears in unit C to rotate shaft 31d of said section twice as fast as shaft 31 in unit B, the position of the shafts 3l and 3io, however remaining the same in both sections B and C, so

that the beveled gear 9 of shaft 8 will directly mesh with either of the beveled gears 36 or 3fm depending upon which unit B or C is installed.

The provision in my `press of interchangeable one-way and two-way printing units B and C directly useable with the same paper feeding and delivery unit A, is novel and constitutes an important feature of my invention; also the provision in said interchangeable printing units of means for varying the speed of the paper handling parts is important, for by such arrangement and construction when the output of the one-way press becomes too small, and a two-Way press will fill the requirements, the owner of a oneway press whose requirements has increased enough to justify a machine of greater output, can readily secure this result by merely replacing the one-way printing unit B shown in Fig. 1 with the two-way printing unit C shown in Fig. 3, the driving section of each printing unit being disposed thereunder to facilitate the above change. This procedure saves the owner the necessity of having to purchase and install an entirely new and larger press, after having removed the old press.

I do not limit my invention to the exact details shown in the drawings, for obviously changes may be made therein within the scope of the claims.

I claim:

l. A printing press, comprising a paper feeding and delivery unit having web feeding and delivery rolls; and a fiat bed travelling cylinder printing unit detachably connected with said first mentioned unit and provided with reciprocating cross-heads carrying the cylinders, and driving mechanism in said printing unit for reciprocating said cross-heads and for rotating the feeding and delivery rolls of the first mentioned unit.

2. In a printing press as set forth in claim 1, said printing unit comprising a one-way press, and said driving mechanism imparting corresponding speed of rotation to the feeding and delivery rolls.

eating cross-heads carrying the cylinders, and driving mechanism disposed below said printing unit for reciprocating said cross-heads and for rotating the feeding and delivery rolls of the first mentioned unit.

5. In a printing press as set forth in claim 4, said printing unit comprising a one-way press, and said driving mechanism imparting correspending speed of rctaton to the feeding and delivery rolls.

6. In a printing press as set forth in claim 4, said printing unit comprising a two-way press, and said driving mechanism imparting correspending speed cf rotation to the feeding and delivery rolls.

'7. A printing press comprising a paper feeding and delivery unit having web feeding and delivery rolls; and a flat bed travelling cylinder printing unit detachably connected with said rst mentioned unit and provided with reciprocating cross-heads carrying the cylinders, driving mechanism in said printing unit for reciprocating said cross-heads, said mechanism including a driven gear; and a shaft journaled in said first mentioned unit and having a gear adapted to mesh with said driven gear when the units are connected, said shaft imparting rotation to the feeding and delivery rolls of the first mentioned unit.

8. In a printing press as set forth in claim '7, said printing unit comprising a one-way press, and said driving mechanism including means for rotating the driven gear to impart corresponding speed of rotation to the feeding and delivery rolls.

9. In a printing press as set forth in claim '7, said printing unit comprising a two-way press, and said driving mechanism including means for rotating the driven gear to impart corresponding speed of rotation to the feeding and delivery rolls.

10. A printing press comprising a paper feeding and delivery unit having web feeding and delivery rolls; and a flat bed travelling cylinder printing unit detachably connected with said iirst mentioned unit and provided with reciproeating cross-heads carrying the cylinders, driving mechanism depending from the lower end of said printing unit for reciprocating said crossheads, said mechanism including a driven gear; and a shaft journaled in said first mentioned unit and having a gear adapted to mesh with said driven gear when the units are connected, said shaft imparting rotation to the feeding and de livery rolls of the first mentioned unit.

11. In a printing press as set forth in claim l0, said printing unit comprising a one-way press, and said driving mechanism including means for rotating the driven gear toimpart corresponding speed of rotation to the feeding and delivery rolls. l2. In a printing press as set forth in claim 10, said printing unit comprising a two-way press, and said driving mechanism including means for rotating the driven gear to impart corresponding speed of rotation to the feeding and delivery rolls.

13. In a printing press as` set forth in claim 10, said driving mechanism including a crank shaft disposed below the bed, cranks on said shaft carrying pins operating in vertically disposed slots in the lower ends of the cross-heads, a drive shaft, gearing between the drive shaft and crank shaft, and gearing between the drive shaft and driven gear.

WALLACE I-I. GRANGER.

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