US2112850A - Punching machine and the like - Google Patents

Description

April 5, 1938. P: c. KLINGLER ET AL PUNCHiNG MIQCHINE AND THE LIKE 6 Sheets-Sheet 1 Filed Aug. 5, 1936 5 VJ I m i & 0 min Y mnz M mnfi m MW n Tumwl WM 5 B April 5, 1938. P. c. KLlNGLER ET AL PUNCHING MACHINE AND THE LIKE Filed Aug. 3, 1956 6 Sheets-Sheet 2 km -.r 4 S N C W mmfi m y m mm WITNESS Wmww April 5, 1 938. P. c. KLINGLER ET AL 2,112,350

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A TTORNEYS Patented Apr. 5, 1938 UNITED STATES PATENT OFFICE side, N. 3., assignors to Super-Speed Press poration, Riverside, N. 1., a corporation of Delaware Application August s, 1936, Serial No. 94,030

20 Claims.

This invention relates to the working of sheet material to desired outlines or configurations, as by punching or die-working operations in machines of the type commonly known as punching machines, which are used especially for blanking articles of different configurations from paper, cardboard, sheet metal and other kinds of strip or sheet material. In many machines heretofore designed for this purposejthe practice is to intermittently actuate the punch or die(s) in alternation with the feed means by which the strip or sheet material is advanced. Due to the intermittent and alternate action of the feeding and punching mechanism, the operation of such machines is attended by excessive vibration which has a limiting influence upon their speed, and, in turn, upon their output. This is especially serious in the punching or die-working of sheet metal of any thickness or toughness, because of its resistance to deformation by the punch or die(s).

A further disadvantage of prior art punching machines of the type referred to is that the intermittent and jerky operation of the feed means caused overrunning of the supply rolls from which the strip material was drawn. This resulted in vaquent wastage in material the extent of which mounted rapidly with quantity production and thus added proportionately to production cost.

The chief object of our invention is to overcome the above indicated drawbacks; that is to say: we aim to minimize vibration in punching machines with a view toward making it possible to operate them at much higher speeds than heretofore, and to thereby secure a correspondingly greater production from them, and at the same time preclude unnecessary waste in the material.

hereinafter more fully disclosed, through provision of a feed means whereby the sheet or strip material is continuously advanced in the machine, and a synchronously operated, rotarily actuated,

oscillating punch which penetrates the material while moving in the same direction therewith.

In connection with punching machines having the above-mentioned attributes, it is a further aim of our invention to provide means whereby the crank throw can be adjusted to vary the oscillating motion of the punch, and the crank shaft positionally adjusted compensatively, to adapt the machine for punching blanks of different sizes 'jfrom materials of different thicknesses. Another objectof our invention is to provide These desiderata, we realize in practice, as.

a simple balanced drive system with interposed adjustable means whereby the operation of the 'die means and the feed means can be regulated in accordance with the length of the blanks which are to be punched in the machine so as to avoid waste of the material between successive punchings.

Other objects and attendant advantages will appear from the following detailed description of the attached drawings:

Fig. I shows the plan view of a punching machine conveniently embodying our invention.

Fig. II is a side elevation of the machine looking from the right of Fig. I.

Fig. III is a fragmentary longitudinal sectional view of the machine drawn to a larger scale and taken as indicated by the arrows lII-III in Fig. I.

Fig. IV is a cross-sectional view of the machine taken as indicated by the arrows IV--IV in Figs. I and III.

Fig. V is a detail sectional view taken as indicated by the arrows V-V in Figs. I and IV.

Fig. VI is an exploded perspective view of the crank shaft of the machine.

Figs. VII and VIII aredetail views showing the crank set in different positions of adjustment relative to the shaft axis.

, Fig. IX is a detail sectional view taken as indicated by the arrows IXIX in Fig. III, and

Fig. X is a view corresponding to Fig. III showing an alternative embodiment of our invention.

Referring first to the form of our invention illustrated in Figs. I-IX, the framework of the ma= chine consists of two suitably spaced side frames or standards I, and a supporting base 2. As shown the base 2 is recessed as at 3 for capacity to serve as a catch pan for fluid used in lubrieating the strip or sheet material M which is being punched in the machine. Bolted to the opposite ends of separable upper sections 4 of the side frames l, are transversely-aligned journal brackets 5 and 5 respectively for cooperative pairs of superposed feed rolls 1, 8 and 9, I0 whereby the strip or sheet material M is continuously drawn from a supply roll (not illustrated) and progressed horizontally through the machine in the direction indicated by the arrows in,Figs. I- and III. The shafts H and ll! of the lower, feed rolls 8 and Hi are directly journalled in the brackets 5, 6; while the shafts I3, l4 of the upper rolls 9 and l I are rotatably supported by bearing blocks l5, l5 engaged in the vertical guide ways l'l, I8 of said brackets. The bearing blocks l5, is are urged downwardly by compression springs I9, 20

(see Figs. I and III) and in order that the upper feed rolls 1, 9 may be simultaneously lifted clear of the lower feed rolls 3, l3 to permit initial threading of the material M between said rolls, we have provided a manually operable roll-lifting means which is illustrated to the best advantage in Figs. I, IIIand Ix. As shown, this roll-lifting means comprises a pair of transverse rock shafts 2|, 22 with amxed rotary cams 23, 24 that respectively bear on the tops of the brackets 5,3,and with arms 25, 23 which are coupled by means of a link 21, which extends longitudinally of the machine. Also affixed to the rock shafts 2|, 22 are operating handles 23, 29 respectively. Thus, with this arrangement, by swinging either of the handles 23, 29 clockwise from the position shown in Fig. III, the coupled rock shafts 2|, 22 will be correspondingly rotated and the upper feed rolls 1, 9 elevated as shown in Fig. V, by action of the rotary cams 23, 24 in a manner readily understood.

Supported for horizontal reciprocation in guide ways 33 at the inner sides of the upper sections 4 of the standards I, is a carriage 3| with hanger brackets 32 which respectively engage said guide ways. (see Figs. III and IV). As shown, the carriage 3| comprises upright side members 33 which, at their bottoms are bolted to the ends of a transverse connecting member 34 and which, at their tops, are connected by transverse tie rods Confined to up and down movement in vertical guide ways 33 afforded by the end members 33 of the carriage 3|, is a transversely-extending bar-like slide or head 31 whereto is secured, centrally of its bottom, a punch or male die member 33 which is adapted to cooperate with a block or female .die member 39 correspondingly located on the bottom cross member or bar 34 of said carriage. As shown in Fig. III, thecontinuously travelling sheet material M extending between the pairs of feed- rolls 1, 3 and 9, l3 passes over the part 39 on the carriage 3| and under the part 33 on the slide 31, so that when these parts 33, 39 come together on the material M while travelling with it (under actuation as hereinafter described), they coact in die-working or punching the material, as the male member 33 presses the material against the member 39, and itself even enters into said member 39. From Fig. III, it will be noted that one side of each vertical guide way 33 of the carriage is formed by a wedgeshaped bar 43 which can be positionally adjusted vertically to take up wear from time to time, by means' of adjusting screws 4|.

Bolted to the tops of the separable sections 4 of the side frames of the machine at the center are supporting blocks 42 with openings for circular bushings 43 which have eccentrically-disposed bearing apertures 44 (Fig. V) for the journalling of a transverse shaft 45. As shown in Figs. I and 111, this shaft 43 has a medial eccentric crank 43 which passes through aligned bearing apertures in the upstanding end portions 41 of the punch-carrying slide or head 31 to actuate the latter. ,Operating on and through the slide 31, the crank 43 reciprocates the carriage 3| and the parts 33, 39 to and fro horizontally, and also moves the part 33 down and up toward and from the part 39. By rotatively adjusting the bushings 43 in the supporting blocks 42, the level of the crank shaft 45 can be altered with respect to the material M passing through the machine, for a purpose explained hereinafter. In order that such adjustments may be effected with accuracy, the bearing bushings 43 are formed with gear teeth anasuo 43 which mesh with worms 49 on ygiaralle'l shafts 53 which latter extend longitudinally of the machine and have their opposite ends respectively journalled in bearing standards 5| secured to the bearing brackets 5 for the feed rolls 1, 3 and in bearing lugs 32 on the journalsupporting blocks 42 for the crank shaft 45. A cross shaft 53 also journalled in the bearing standards 5| has bevel gears 55 at opposite ends thereof which mesh with bevel gears 53 on'the parallel shafts 33, the latter being rotatable by means of the hand wheel indicated at 51. It will be noted that the bearing blocks 42.are split as at 53 and provided with clamp screws 59 for fixing the bushings 43 in adjusted positions.

As shown in Figs. IV, and VI, the crank shaft 45 is of multipartite construction, including outer sections 33 with concentric end discs 3| having eccentrically disposed recesses 32 in their opposing faces, and intermediate sections 33 with end discs 34 which are eccentric to the eccentriccrank portions 43 between them, and which flt into said recesses 32. The crank portions 43 of the intermediate sections 33 of the shaft 45 meet at the center of the machine and are connected as shown in Figs. I, IV, and VI by a spline collar 35. The several component sections of the crank shaft 45 areheld assembled by flange rings 33 (Figs. IV, VI, VII and VIII) which are detachably secured to the inner faces of the discs 3| by screws, and which marginally overlap the corresponding faces of the discs 34 of the inter mediate sections 33. By rotating the discs 34 of the sections 33 within the eccentric recesses 32 of the discs 3| of the outer sections 33, it is pos- 1 sible to vary the throw of the crank 43, for a purpose later on explained. As an aid in making the adjustment just referred to, the discs 34 are graduated as shown in Figs. VII and VIII for coordination with marks 31 on the rings 33. Also,

as shown in Figs. VII and VIII and in Fig. VI, the discs 3| are radially split as at 33 and provided with clamp screws 39 for fixing the parts in adjusted positions. Relatively heavy fly wheels 13 adjacent opposite ends of the shaft 45 are relied upon to balance the action of the crank 43 and the parts connected thereto.

The driving mechanism of the machine includes an electric motor 1| which is mounted on a supporting bracket secured to one of the side frames The shaft 12 of the motor carries a self-adjusting pulley 13 of a well-known type having laterally-shiftable opposing cone components 14 which are subject to a compression spring 15 as shown in Fig. I, said pulley being connected by a belt 13 with one of the fly wheels 13 on the crank shaft 45. Supported by a bracket 11 at the side of the machine opposite that 00- cupied by the motor 1| (see Fig. II) is a Reeves variable speed device 13 whereof the input shaft 19 is driven by a sprocket chain 33 from the crank shaft 45. The output or deliveryshaft 3| of the variable speed device 13 is in turn connected by a sprocket chain 32 with a stub shaft 83 suitably journalled in the upper frame component 4 at,v

the corresponding side of the machine, from which the lower feed roll of the pair 1, 3 is driven shaft 31 having miter gears 33, 39 at opposite ends thereof meshing respectiveLv with companion miter gears 90, 9I on the shafts I I, I2 of said lower feed rolls. By means of the variable speed device I8, the rate of feed of the material M by the rolls I. 8 and 9, I0 can be adjusted as desired relative to the operation of the eccentriccrank actuator 46 for the members 38, 39. Thus the horizontal movement of these parts 39, 39 can be matched with that of the material M at the moment when said parts are actually act.- ing on the material as described above: in other words. the device I8, serves for synchronizing the.

speed and feeding action of the feed rolls I, 9 and 9, I0 with the movement of the parts 38, 39 parallel with the sheet material when the latter is being deformed or punched.

Associated respectively with the fly wheels I0 are expanding brake shoes whereof one set is shown at 92 in Fig. II, said shoes being adapted to cooperate with the inner peripheries of drums 98 which may be either secured to or integrally formed with said fly wheels. The wedge pins 94 for the brakes are supported in arms 95 hung from opposite ends of the crank shaft 45, the lower ends of said arms being freely engaged in openings 96 in the projecting ends of a centrally allocated fixed cross bar 91 by which the side frames I of the machine are connected at the top. The means for operating the brakes includes a pedal 99 which is secured to a transverse rock shaft 99 journally in the lower part of the machine frame, and which is normally held elevated against a fixed stop I00 by a helical tension spring IOI. Arms I02 at opposite ends of the rock shaft 99 are coupled by vertical links I03 with the actuating arms I05 on the wedge pins 94 of the brakes. As shown in Fig. 11, each of the links I03 is made in two sections I06, I01 which are coupled at I08 with capacity for lost motion for a purpose presently explained. To the lower section I0'I of the link I03 is secured a collar I09 for coacting with the finger IIII of a snap switch II I which is secured to the frame I at the corresponding side of the machine and interposed in the power circuit I I2 of the electric motor--all as shown in Fig. II. The blanks punched from the material M drop through an opening I I3in the bottom member 34 of the carriage 3I upon an underlying endless reticulate apron 4 which may be of wire mesh, and which, as shown in Figs. II and III is trained about supporting pulleys II 5, II 6. The shaft II 1 of the pulley I I5 is journalled in bearing brackets II8 secured to the upper frame members 4, and the shaft II9 of the pulley H6 in suitable bearings I20 afforded by said frame members. The apron II 4 is driven at a speed slightly less than that of the material M by a belt connection I 2! (Fig. II) with the shaft I2 of the lower feed roll of the pair 9, I0, and delivers the blanks to-a suit-' able point of disposal.

For the purpose of lubricating the material M and thereby facilitating the blanking, we have fitted the machine (see Figs. I and III) with transverse troughs I22, I23 for fluid lubricant respectively above and below the plane of travel of said material. Under control of adjustable nozzles I24, lubricant is released from the upper trough I22 to drop upon'an applicator roll I25 which runs in contact with the top surface of the material; while another applicator roll I26 serves to evenly distribute lubricant from the lower trough over the bottom face of said material. Excess lubricant dripping from the material M or the delivery belt H4 falls into the hollow of the base 2 from which it may be drained from time to time as occasion requires.

The operation of the machine Is as follows: Byrotation of the crank shaft 49, the carriage 3| is moved back and forth on the guides 90 parallel to the material M which is continuously advancing, horizontally, from right to left in Figs. I and III, and lubricated by the rolls I 29, I29 associated with the lubricant troughs I22, I23.

Assuming the speed of the shaft to be synchronized with that of the feed rolls I, 8 and 9, I0, it will be apparent that during each rotation of the crank 46, a blank B will be punched from the material M by the punch 38 when the carriage 3| moves in the same direction as said material, the motion of said punch during each cycle being an oscillating one. As a consequence of this, and by virtue of continuous progression of the material M, it will be apparent that vibration is reduced to a minimum so that the machine can, with safety, be operated at much higher speeds than attainable with machines heretofore designed for punching, and a correspondingly greater output secured. The blanks B successively punched from the sheet M drop in overlapping relation, as shown in Fig. III, upon the apron II4. Through proper setting of the crank 46, to adjust its throw, as above described, the punchings may be closely spaced with resultant preclusion of unnecessary waste in the material. Also, by this adjustment of the throw or eccentricity of the crank 46 to vary the extent of travel of the parts 38, 39 parallel with the sheet material M between the feed rolls I, 8 and 9, I0, and corresponding adjustment of the variable speed device I8 (if necessary) to synchronize the speed of the feed rolls 1, 8 and 9, I0 with the movement of the punch 38, the machine may be adapted to produce blanks B of different sizes from materials of different thicknesses. Of course the difference in size to which the machine must be adapted by adjusting the throw or eccentricity of the die or punch-actuating eccentric-crank is a difference in the dimensions of the die(s) or punch in the common (horizontal) direction of travel of the parts 38, 39 and the material M. Adjustment of the height of the crank shaft 45 and of its distance from the lineof travel of the material M (by means of the eccentric bearings 43) is generally required when a substantial change in the crank throw or eccentricity is made, to compensate for the effect of such change on the coming together of the parts 38, 39. Again, when general speed changes are desired or required between the shaft 45 and the feed rolls 'I-I0, the gears 85, 86 may be removed and others of a different ratio substituted. Incident to adjustment of the crank shaft bearings 43 as above explained, the pulley I3 on the shaft I2 of the motor 'II will adapt itself to the pull on the belt I6 due to the change in distance between the shafts 45 and I2.

In the alwrnative form of our invention-illustrated in Fig. X, the positions of the carriage 3Ia, the punch 38a and the die block 39a are reversed, so that the punching is effected through upward displacement of the blanks from the material M which is continuallyadvanced horizontally in the machine as before by the feed rolls Ia, 8a and 9a, Illa. In lieu of a delivery belt, we

tops by attached transverse angle pieces I33. The

angle pieces I are secured at their ends to fixed standards at opposite sides of the machine, one

of which is indicated at III, with capacity for adjustment so that the magazine can be adapted for blanks B of different sizes. Attached angle clips I near the bottom ends of the strips I12 are similarly secured, with capacity for adjustment to the top of the carriage In as shown. Accordingly as the carriage Jla moves back and forth, the end wall strips I32 of the magazine I" flex to accommodate such movement with the accumulated blanks B held between them. Since the magazine I is of open construction and stationarily held at the top, the blanks B can be readily withdrawn from time to time by hand while the machine is running. In all other respects, the machine of- Fig. x is identical in construction and .operation with the first described form of our invention. Accordingly in order to preclude the necessity for duplicate description, all corresponding parts which have not been specifically referred to are indicated by the same reference numerals which were previously employed, except that in each instance, the letter a-has been added for the purpose of distinction.

Having thus described our invention, we claim:

1. A machine for die-working sheet material comprising means for continuously feeding the sheet material, male and female die members at opposite sides thereof, actuating means for said die members operative at each actuation to cause them to travel with the material as well as to come together on it and one into the other, means for adjusting the rate of feed in relation to the operation of said actuating means, and means for adjusting said actuating means to vary the extent of travel of said die members, so as to adapt the machine for operation with die members whose dimensions in the direction of travel are different. 7

2. A machine for die-working sheet metal comprising means for continuously feeding the sheet metal, maleand female die members at opposite sides thereof, an eccentric rotary actuator for moving said die members to and fro substantially parallel with the line of travel of the sheet metal, and for also bringing them together on it and one into the other while moving with the sheet metal, and means for adjusting the eccentricity of said actuator to vary the extent of travel of said die members, so as to adapt the machine for opera-. tion with die members whose dimensions in the direction of travel are different.

3. A machine for die-working sheet metal comprising means for continuously feeding the sheet metal, male and female die members at opposite sides thereof, an eccentric rotary actuator for moving said die members to and fro substantially parallel with the line of travel of the sheet metal, and for also bringing them together on it and one into the other while moving with the sheet metal, means for adjusting the eccentricity of said actuator to vary the extent of travel of said die members, so as to adapt the machine for operation with die members whose dimensions in the direction of travel are diiferent, and means for adjusting the distance of the actuator axis from the line of travel of the sheet metal to compensate for the effect of change in the eccentricity of the actuator on the coming together of the die members.

4. A machine for punching sheet material com prising means for continuously feeding the sheet material, coacting punch and block members at opposite sides thereof, an eccentric rotary actuator for moving said members to and fro substantially parallel with the line of travel of the sheet material, and for also bringing them together on it to punch it while moving with it, and means for adjusting the eccentricity of said actuator to vary the extent of travel of said members, so as to adapt the machine for operation with punches whose dimensions in the direction of travel are 7,

diflerent.

5. A machine for punching sheet material comprising means for continuously feeding the sheet material, coacting punch and block members at opposite sides thereof, an eccentric rotary actuator for moving said members to and fro substantially parallel with-the line of travel of the sheet material, and for also bringing them together on it to punch it while moving with it, means for adjusting the rate of feed in relation to the operation of said actuator, and means for adjusting the eccentricity of said actuator to vary the extent of travel of said members, so as to adapt the machine for operation with punches whose dimensions in the direction of travel are different.

6. A- machine for die-working sheet metal comprising means for continuously feeding'the sheet metal, male and female die members at opposite sides thereof, a carriage carryin one of said members and guided for movement to and fro substantially parallel with the line of travel of the sheet metal, a slide carrying the other member, with guideways for said slide on said carriage substantially at right angles to the sheet metal as it passes the carriage, a rotary eccentric-crank engaged with said slide and operating therethrough to reciprocate the carriage, and also bringing said die members together'on the sheet metal and into one another while moving with the sheet metal, and means for adjusting the eccentricity of said eccentric crank to vary the ex-' tent of travel of said member s, so as to adapt the machine for operation with die members whose dimensions in the direction of travel are different.

7. A machine for punching sheet metal comprising means for continuously feeding the sheet metal, punch and block members at opposite sides thereof, a carriage carrying one of said members and guided for movement to and fro substantially parallel with the line of travel of the sheet metal, a slide carrying the other member, with guideways for said slide on said carriage substantially i; right angles to the sheet metal as it pases the carriage, a rotary eccentric-v punches whose dimensions in the direction of travel are different, and means for adjusting the distance of the eccentric-crank axis from the line of travel of the sheet metal, to compensate for the efi'ect of change in the eccentricity of the eccentric-crank on the coming together of said punchand block members.

8. A punching machine comprising means for continuously feeding sheet material horizontally;

a carriage confined to movement parallel with the material; a punch on the carriage confined to vertical movement; and a rotary shaft with a v crank engaging the punch whereby the carriage 2,119,850 is moved back and forth and the punch reciprov gaging the punch whereby the carriage is moved back and forth and the punch reciprocated vertically in the carriage to penetrate the material during the movements of the carriage in the direction of travel of the material; and eccentric bearings for the ends of the crank shaft rotatably adjustable in fixed supports of the machine frame.

10. A punching machine for continuously feeding sheet material horizontally; a carriage confined to movement parallel with the material; a punch on the carriage confined to vertical movement; a rotary shaft with a central crank engaging the punch whereby the carriage is moved back and forth and the punch reciprocated vertically in the carriage to penetrate the material during the movements of the carriage in the direction of travel of the material; eccentric bearings for the ends of the crank shaft rotatably adjustable in fixed supports on the machine frame; and means whereby the bearings can be concurrently rotated in making the adjustments.

11. A punching machine for continuously feeding sheet material horizontally; a carriage confined to movement parallel with the material; a punch on the carriage confined to vertical movement; a rotary shaft with a central crank engaging the punch whereby the carriage is moved back and forth and the punch reciprocated in the carriage to penetrate the material during the movements of said carriage in the direction of travel of the material; eccentric bearings for the ends of the crank shaft rotatably adjustable in fixed supports on the machine frame; and means whereby the bearings may be concurrently rotated in making the adjustments including worms in engagement with circumferential teeth on the bearings and. coordinating operating connec-- movements of the carriage in the direction oftravel of the material; and a drive system with means whereby the speed of the sheet feeding means and the shaft may be synchronized.

13. A punching machine comprising feeding means for sheet material including spaced pairs of cooperating feed rolls; a carriage confined to reciprocating movement parallel with the material in the interval between the feed rolls; a punch on the carriage confined to reciprocating movement at right angles to the material; a rotating shaft with a crank engaging the punch whereby the carriage is moved back and forth and the punch concurrently reciprocated in the carriage to penetrate the material during movement of said carriage in the same direction as the material; drive means for rotating the shaft; drive connections between said shaft and the feed rolls; brake means for the shaft; and control vmechanism whereby the drive "means is rendered ineffective concurrently with application of the brakes.

14. A punching machine comprising feeding means for sheet material including spaced pairs o'f cooperating feed rolls; a carriage-confined to movement-parallel with the material in the interval between the feed rolls; a punch on the carriage confined to movement at right angles to the material; a rotating shaft with a crank engaging the punch whereby the carriage is moved back and forth and the punch concurrently reciprocated in the carriage to penetrate the material during the movement of said carriage in thesame direction as the material; drive connections between the shaft and the feed rolls; an electric motor for driving the machine; a switch in circuit with the motor; brake means for the shaft; and control means whereby the switch is opened concurrently with application of the brake.

15. A punching machine comprising means for continuously feeding sheet material; a carriage confined to movement parallel with the material; a punch on the carriage confined to movement at right angles to the material; a rotating shaft with a crank engaging the punch whereby the carriage is reciprocated and the punch concur-- rently actuated to penetrate the material during the movements of said carriage in the same direction as the material; drive connections between said shaft and the feed means; and an adjustable variable speed means interposed in said drive connections whereby the movements of the shaft and the rolls may be synchronized.

16. A punching machine comprising means for continuously feeding sheet material including spaced pairs of cooperating feed rolls; a carriage confined to movement parallel with the material in the interval between the feed rolls; a punch on the carriage confined to movement at right angles to the material; a rotating shaft with a crank engaging the punch whereby the carriage is moved back and forth and the punch concurrently reciprocated in the carriage to penetrate the material during the movements of said carriage in the same direction of feeding; drive means for rotating the shaft; drive connections between said shaft and the feed rolls; a weighted fiy wheel on the shaft; a brake associated with the fiy wheel; and control mechanism for rendering the drive ineffective concurrently with application of the brake.

1'7. A punching machine comprising spaced pairs of cooperating feed rolls for continuously advancing sheet material horizontally; a carriage confined to horizontal movement in the interval between said feed rolls; a punch confined to vertical movement in the carriage; rotary means for reciprocating the carriage and for actuating the punch to penetrate the material during movements of the carriage in the direction of feeding; adjustable drive connections whereby the speed of the feed rolls and the shaft may be synchronized; 'a delivery belt underlying the material for receiving the punchings; and means whereby said delivery belt is driven from one of said feed rolls.

18. A punching machine comprising means for continuously advancing sheet material horizontally; a carriage confined to horizontal movement parallel with the material; a punch confined to vertical movement in the carriage; means for reciprocating the carriage and for actuating the punch to'penetrate the material from beneath during movements oi the carriage in the same direction as the material; a die on the carriage to coact with the punch; and a magazine above the die to receive and retain the punchings.

19. A punching machine comprising means for continuously advancing sheet material horizontally; a carriage confined to movement parallel with the material; a punch confined to vertical movement in the carriage; means for reciprocating the carriage and for actuating the punch to 15 penetrate the material from beneath during movements of the carriage in the same direction as the material; a die on the carriage to coact with the punch; and a magazine of open construction above the carriage, said magazine having vertical end walls of flexible strip metal stationarily supported at their tops and having their lower ends connected to the carriage so as to flex in responding to the movements of the latter.

20. A punching machine according to claim 19, wherein the walls 01' the magazine can be adjusted tor the accommodation of punchlngs oi. diflerent sizes.

PAUL C. KLINGIER. GEORGE ESCHEFFEY.

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