US1451057A

US1451057A - Paper-cupping machine

Info

Publication number: US1451057A
Application number: US477752A
Authority: US
Inventors: Walter R Schindler
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-06-15
Filing date: 1921-06-15
Publication date: 1923-04-10
Anticipated expiration: 1940-04-10

Description

Apr. 10, 1923.

- w.l R.,.scH|NDLER PAPER CUPPING MAcHiNE C5 sheets-sheet l Filed June 15, v19.21

W. R. SCHINDLER PAPER CUPPING MACHINE Apr. 10, 1923. L45L057 Filed June 15, 1921 5 sheets-sheet 2 Apr. l0, 1923. 1,451,057

w. R. SCHINDLER PAPER C'UPPING MACHINE Filed June l5, 1921 5 sheets-sheet 5 zo 50 5y-755125 Z4 Patented Apr. 10, 1923.

PAPER-CUPPING IIACHINE.

Application filed .Tune 15,

To all whom t may concern.'

Be it known that I, VALTER R. SGHINDLER,

a citizen of the United States, residing at Los Angeles, in the county of Los Angeles, State of California, have invented new and useful Improvements in Paper-Clipping Mw chines, of which the following is a specification.

This invention has to do with a paper cupping machine, and it is an object ofthe invention to provide a simple, effective niachine of that character.

A particular object ofthe invention is to provide a machine to effectively form paperl cups and particularly comparatively large paper cups, such, for instance, as are used as-hoods to protect young plants. lt has Vbeen found in practice difficult to efficiently form comparatively large paper cups without tearing and thus spoiling many of them.

The present machine is entirely automatic Aand because of the novel means provided by the present invention will operate to very rapidly and accurately form sheets of paper into cups without tearing them.

rlhe construction of the die, provided by the present invention for forming the sheets of paper into cups, is a distinctive and importantl feature of the invention. The die is simple in construction and operation yet is particularly effective in properly and permanently cupping the paper without tearing it.

The various objects and features of the invention, including those hereinabove inentioned, will be best and and more fully understood from the following` detailed 'de scription of a typical embodiment of the invention throughout which reference is had to the accompanying drawings in which- Fig. 1 is a plan view of the machine; Fig. 2 is an enlarged vertical longitudinal detail sectional view of the machine shown in Fig. 1, being a view taken as indicated by line 2-2 on Fig. 1; Fig. 3 is a transverse sectional view of the machine, being a view taken as indicated by line 3-3 on Fig. Q: Fig. 4 is an enlarged side elevation of a portion of the machine, being a view taken as indicated by line 4 4 on Fig. '1; Fig. 5 is an enlarged transverse sectional view of the machine, taken as indicated by line 5 5 on Fig. 1, showing the position in which the 1921. seria1N0.477,752. i

engagement with the Vfemale die, the `female die being shown in section to make clear the relative positioning of the male and female dies; Fig. 9 is a view similar to F ig'. 8 showing the positioning of the crank at the time that the male die is held in pressure engage- `ment with the female die; and Fig. y1() is an `enlarged detail longitudinal sectional view of the male and female dies showing them together.

The particular machine herein set forth to illustrate the present invention comprises, generally, a frame 10, two female die parts 11, two male die parts 12, one adapted to cooperate with each of the female dies 11; a mechanism 13 foroperating the male dies 12, and an automatic feeding mechanism 14 adapted to automatically feed sheets of paper to the co-operating male and female die parts. rThe die

parts

11 and 12, the operating mechanism 18, and the feed mechanism 14, are all suitably arranged and mounted on the frame 10. The female die parts 11, hereinafter termed the female dies, are spaced apart in the frame l0 and are oppositely disposed. The male die parts 12, hereinafter termed the male dies, are oppositely disposed,lbeing mounted on opposite sides of a cross-head 15 arranged between the female dies 11 and carriedby suitable guides 16 supported by the frame 10. VThe Acrosshead 15 is reciprocated by the operatpair of co-operating dies. With thek generalA arrangement pist described, a single operat-y ing mechanism 13 properlyv operates two separate and independent die mechanisms.'

n other words, byproviding two die mech'- anisms in connection with the operation gif mechanism, a cup is formed at each movement of the cross-head 15. By this particular arrangement the invention provides a simple, compact machine, capable of torming cups very rapidly.

The die mechanisms, each of which coinprises male die and a female die, and the feeding mechanisms 14e, struction and operation, so, therefore, l will proceed to'describe in detail only one ot the die mechanisms and the Yfeeding mechanism for that particular die mechanism, it being understood, of course, that such description is applicable also to the other die mechanism and its co-operating feed mechanism.

rlhe female die 11 comprises, generally, three parts, an outer part 18, an inner part 19, and a central member or finger 20. The

kouter part is formed with a suitable YFlange 22 by which it is solidly mounted on a solid frame member 21. The inner part 19 ot the female die is separate from the outer part 18 and is carried concentrically in the outer part 1S by astem 23 carried in a suitable guide 241. rlhe stem 23 is preferably in the form of a tube and the guide 24.- is preterably in the form or a tube which slidably carries the stem 23. The inner part 19 may be detachably carried at the outer end et the stem 23, say, for instance, it may be screw-threadedly connected to the stem 23, in the manner clearly illustrated in Figs. 2 and 10 ot the drawings. The outer part 18 of the female die is termed with a central concentric opening. 25 which is adapted to receive the inner part 19 so that. the inner part can be moved into the outer part to a position where its face 26 forms a continuation of the tace 27 of the outer part. A shoulder 28 is provided in the opening 25 to support the inner part 19 and prevent it being moved inwardly trom `the position where its tace 26 iorms a continuation ot the face 27 of the outer part. A helical spring 30 is arranged in the stem 27 and guide 24- between the inner part 19 and a plug 31 adjustably removably carried in the end ot the guide 24s. in practice the plug may be screw threaded in the end ot the guide 241 in the manner illustrated in the drawings. The spring 30 is under compression between the plug 31 ant inner part 19, so that it tends at all times to hold the inner 'part 19 yout into the outer part 1S in a position such asis shown at the lett in Fig. 2. It will be obvious how the pressure with which the part 19 is held out may be suitably regulated by adjusting the position ot the plug 31 in the guide 2a. The outward movement ot the inner part may be limited by a pin 170 extending from the guide 24 into a groove 171 in the stem 23.

The finger 20 is slidably carried in a suitable opening 'termed concentrically in the inner part i.

are identical in conits outer end. The linger is adapted to be pushed or moved inwardly through the opening 33 until the head 311 seats in a suitable recess 35 i'j'ormed in the inner part 19. When the heal 3a is seated in the recess 35 it forms a continuation orn the face 26 ot the inner part 19. At the inner end or" the finger 2O there is a head 36 slidably carried in a guide 37 extending rearwardly from the inner part 19 within the helical spring 30, stem 23 and guide 24, in the manner clearly illustrated in Fig. 10 oi" the drawings. A suitable plug 37n is adjustably removably carried in the end ot the guide 37 and a helical spring 38 is arranged in compression between the head 36 and plug 37ZL to normally hold the finger 2O outwardly in the opening 33 in which position the head 3-1 is removed from the vrecess 35 and is substantially in line with the forward end or mouth oft the outer portion 18, as clearly illustrated at the lett in Fig. 2. The head 36 at the inner end ot the Finger O engages the inner part 19 to limit the outward movement ot the finger 20. The pressure with which the finger 2O is held, may be suitably regulated by adjusting the position ot the plugv37 in the guide 38. fllhe construction herein sotar described provides a female die formed of two relatively movable parts, an inner part and an outer part, the inner part being normally held out in the outer part and being adapted to be moved inwardly in the outer part to position where it. forms a continuation ol the outer part. Further, it will be readily understood how the linger 2O is slidably carried in the inner part 19 and how it is normally held in position when the head 34C at its outer end is atA the outer part ot the die, and how it may be moved to a position where its head 311 is seated in the recess 35' to fill the recess and 'torni a contination of the inner part 19. The construction provided by the present invention permits ot the several -parts ol the female die being readily sparated or taken apart tor purpose ot inspection, repair, etc. y

The male die 12 con'iprises, generally, an outer part adapted to co-operate with the outer part 18 ot the female die, an inner part L11 adapted to co-operate with the inner part 19 ot the female die, and a ,finger 5&2 adapted to co-operate with the finger 29 Vof the female die. The outer part 49 oit the male die is rotatably carried on the cross head 15 coneentrically with the outer part 18 ot the female die. The outer part 40 may be secured to the cross head 15 in any suitable manner. ln the drawings it is shown formed with a flange part lle, which is engaged by a retaining ring 15 secured to the cross head 15 by suitable screws 16. The outer part e() is formed with surface -17 which conforms or corresponds to the surand has a head 34 formed attace 27 of the outer part 18 of the -icinale die, and has a surface 48 which forms an acute angle with the surface '47 and lwhich corresponds to the surface 49 of the outer part 18 of the female die which forms an acute angle with the surface 27 thereof.

The inner part 41 of the male die 12 is detachably mounted on the outer e-nd of a stem 50 which is slidably carried in a suitable guide 51 formed concentrically on the outer part 40.' The inner part 41 has a surface 52 which corresponds or conforms with the. surface 26 of the inner part 18 of the female die and which is adapted to form a continuation of the surface 47 of the outer part 4() when the inner part 41 is seated against the outer part 40 in the manner clearly shown in Fig. 10. A stop 53 is adjustably carried on the stem`50 and a suitable helical spring 54' is carried onthe innerend portion .of the stem 50 between the cross head 15 and the stop 53, so that it normally holds the stem 50 outwardly in the guide 51, thus causing the inner part 41 of the male die to normally bey spaced or removed from the outerpart 40 in the manner illustrated at the left in Fig. 2. Stop 53 engages the end of the guide 51 torlimit the outward movement of thc .stem 50. The amount that the stem 50 extends outwardly in the guide 51 may be regulated byl suitable adjustment of the stop 53.

The finger' 42 is slidably carried in open ings and 61 formed concentrically in theA stem 50 and inner part 41, respectively. There is a head 62 on the inner end of the finger 42. The head 62 is slidably carried in a suitable opening 63 formed concentrically in the stem 50. arranged in compression between a plug adjustably removably carried in the end of the stem 50, and the head 62. The spring' 64 normally moves the finger to its outermost position in which position it extends considerably beyond the inner part 41. The head 64 limits the outward movement of the finger 42. The amount that the spring64 is under compression may be suitably adjusted or regulated by adjusting the position of the plug 65 in the end of the stem 50. lVhen the finger 42 is in its innermost posi,- tion its outer end forms a continuation of the surface 52 of the inner part 41.

The operating mechanism 13 provided by the present invention 'for operating the die mechanism comprises generally. a drive shaft 68 adapted to be operated through a pulley 69, shaft 70 operated from the shaft 68 through suitable bevel gears 71, crank disks 72 mounted on the shaft 70, crank pins ecccntrically mounted on the disks 72, and oonnecting rods 74 connectingthe crank pins 7 3 with the cross head 15. The particular operating mechanism herein set forth embodies two crank disks 72, two crank pins 73, and two connecting,r rods 74 merely in order ythat the cross head 15 may be driven from both sides A helical spring 64 is4 and suitable guide ways 78 are provided in the connecting rod to slidably carry the blocks 77. Compressionsprings 79 are arranged between the ends ofthe guide ways 78 and the blocks 77 to normally yieldingly hold the blocks 77 vcentrally between the ends of the guide ways. The crankpins are eccentricallv carried on the crankdisks 72 so that theyutend to move the cross head a distance greater than the distance between the female dies 11. The male die is therefore moved into vco-operative engagement with the female .die before the cross headhas reached the end of its stroke or movementand when the crank pins 73 are in the pesition shown in Fig. 8. Movement vof the crank pins rfrom the positihon shown in' Fig. 8 to that shown in Fig. 9'tends to further move the male die in the direction of the female die. The female die being Asolidly mounted in the frame 10 prevents movement of the male die and therefore causes thel cvertravel of t-heoperating mechanism to be taken up by springs 79. However7 as the springs 79 are Acompressed in taking up the over travel of the operating mechanism the male die is held with greater'y pressure in the female die. It will be obvious that the pressure with which the male die is held in the female die will depend upon the amount of overtravel-of the mechanism and upon the strength of the springs 79.

In accordance with the presentl invention means is provided in connection with the kdie mechanism to cause relative rotary movement between the two parts of the die mechanism while they are, in co-operative position, or are together as shown in Figs. 8, 9 and 10. in the present form of the invention the male die is supported or carried by the retaining ring 45 so that it can be turned or rotated. A suitable bracket 80 attaches to the male die and an arm 81 extends from the brackets 8O and engages a cam 82 `mounted on one of the connectingrods 74. .The various parts just described are arranged and proportioned so that the cam 82 moves the outer part of the arm 81 vertically during the time that the crank mechanism over/-` travels thus causing the male die to be rotated between the positions shown 1n Figs.

5 and 6. This particular means rotates 'the l male die throughonly a few degrees a's. that is all that is necessary for effective operations ofthe present machine. It will be understood, however, that various mechanism may be provided for rotating a part of the die mechanism and that the means provided in any particular' machine may be such as to cause the proper' amount of rotation of the die parts.`

The particular feed mechanism provided by the present invention comprises, generally, a platform or table 85 adaptedl to carry the sheets of paper which are to be cupped, feed rollers 87, a carrier for carrying the paper from the table to the feed rollers and suitable guide means for the paper. The sheets of paper A are arranged in a pile on the table 85 and are held in the proper piled relation by a suitable iinger 89 carried in guides 90 and held in engagement with the top sheet of the pile by a suitable spring 91.

The carrier 86 is a pneumatic device and comprises a cylinder 92 connected to the crosshead 15 by an adjustable connecting rod 93, al plunger94 arranged in the cylinder 92 and carried on a rod 95 which conf nects to a stationary frame member 96, and

a tube 97 in communicationv with the cylinder 92 and adapted to have its outer end brought into engagement with the top sheet of the pile of papers A on table 85. An annular tip 180 of rubber or the like is preferably mounted on the outer end of the tube 97 to engage the sheets of paper. The connecting rod 93 is pivotally connected to the forward end of the cylinder and is loosely adjustably connected to the cross head, while therod 95 is loosely connected to the frame member 96. The connections of the various parts are such, therefore, that the cylinder and plunger can be moved vertically. When the cross head 15.- is in, so that the male die is in placein the female die, the plunger 94 is at the forward end portion of the cylinder 86. .As the cross head moves outwardly, carrying the male die away from the female die, it carries with it the cylinder 86 thus causing the plunger 94E which is held stationary,'to move through the cylinder toward the rear end thereof. rlhis movement of the plunger relative to the cylinder tends to decrease Wthe pressure in the forward end of the cylinder or to rarify the air in the forward end of the cylinder. When the cross head is in and the plunger is at the forward end of the cylinder the tip 130 at the end of the tube 97 is in engagement with, or is closed by, the topsheet A of the pile of paper on-table 85. As the plunger moves in the cylinder, as above described, decreasing the pressure in the outer end thereof, and

therefore in the tube 97 the top sheet A of the pile of paper on the table 85 is held at the end of the tube 87. As the cylinder is moved by the cross head in the manner described rollers 98, which are connected with the cylinder by suitable arms 99, engage an inclined cam track 100. The cam track 100 causes the cylinder and therefore the various parts of the carrying` mechanism to move upwardly as well as outwardly thus causing the sheet of paper at the end of the tube 97 to be lifted from the pile on table 85 and be carried to the feed rollers 87. In practice the finger 89 and the spring 91 in connection therewith permit of the upper sheet of paper being pulled or romoved from the pile of paper on the table 85 in the manner just described. ln the preferred form of the invention suitable guide members- 101, say in rthe form of wires, are provided to keep the sheet of paper, being carried by the carrier, substantially fiat on a suitable'guide table 102 so that it will be fed in a smooth flat condition to the feed rollers 87.

The feed rollers 87, which are preferablyy comparatively narrow, are mounted on a rotating shaft 108 so as to engage the middle portion of the piece of paper fed to them by the carrier 86. The feed rollers 87 `rotate in the direction indicated by the arrow in F ig. 7 and carry the paper over an idler roller 109 yieldingly held upwardly against the guide rollers by suitable springs 110. The shaft 108 may be rotated at the proper speed, or in synchronism, with the other parts of the machine through any suitable drive mechanism, say a belt drive mechanism such as is shown in the drawing. lAs the paper passes from between the feed rollers and the idler roller it is turned and diy rected downwardly by guide rollers 111, After passing the guide rollers 111 the paper passes downwardly between a face plate 1.12"

female die in order to bend or deflect the sheet of paper outwardly as it passes between the face plate and the guide members so that it will not catch on the edge of the female die.

After the carrier 86 has delivered the sheet of paper to the feed rollers 87 and upon inward, or return, movement of the cross head 15 the rollers 98 engage a suitable cam track 120 suitably spaced from the cam track 100. The cam track 120 causes the cylinder 92 to move inwardlyl and downwardly until the tube 97 engages the top sheet of the pile of paper on table 85. p

From the foregoing description it will be readily understood how a sheet of paper A is automatically fed or delivered into position in front of the female die 11 while the male die is removed from the female die thus causing the sheet of paper to be between the male die and the female die. male die is moved toward the female die the finger 42, in extending from the inner part 41 of the male die, engages the center of the paper and holds orclamps it to the head 34, of the finger 20 extending from the inner part 19 of the female die. The fingers 2() and 42 co-operate to engage or clamp the center of the paper before any other parts of the die mechanism are brought into co-'operative engagement and continue to hold or clamp the paper to hold it centrally in the die mechanism throughout the operation of the die mechanism. After the paper has been gripped by the

fingers

20 and 42 and as the male die continues to move toward the female die, the finger 20 moves inwardly in the inner part 19 of the female die against the resistance of spring 88 until the head 34 is seated in the recess 35. The finger 42 then moves inwardly in the inner part 41 of the male die against the resistance of the spring 64 until the inner part 41 of the male die engages the paper and presses it against the inner part 19 of the female die. The inner part 41 of the male die, is, of course, shaped to accurately lit the inner part 19 of the female die so that theentire'center portion of the sheet of paper is clamped or shaped between these die parts. v

As the operation continues, the inner part 19 of the female die is pressed or moved inwardly in the outer part 18 of the female die against the resistance of spring 30 until it is seated inthe outer part `18 and the outer part 40 of the male die engages the paper and presses it against'the outer part 18 of the female die. Theouter part of the male die accurately lits 'the outer part of the femaledie so that theouter portion of the sheet of paper is clampedor formed between these two die parts.4 Thesuccessive move# ments of the various parts of the die mechavnism, are, of course, due to the relative strengths of lthe springs Vwhich resist the movement of the various parts ofthe die mechanism. At the same time that the outer portion of the paper is clamped between the surfaces 27 and47 of the outer die parts 18fand 40, respectively, the periphery portion of the sheet of paper is clamped or pressed between the

surfaces

48 and 49 of the 'outer part 40 and the outer part 18, respectively. The

surfaces

48 and 49 co-operate to form a flange at the edge of the cup formed by the other parts of the dies. As the operating mechanism continues 'to operate, as hereinbefore described, the sheet of paper is tightly pressed between the two die parts and is ironed by the rotation of the male die part. The ironing of the paper between the die parts while they vthe die after it has been removed fromthe As the Y are held together with yconsiderable pressure causes the paper to be permanently pressed or shaped so that it will retain the form of machine.

In vthe preferred form of the, invention means is provided for heating the die mechal nism in order that the paper 4will be pressed and ironed hot. Inthe present machine an electric heating element 140 is varranged around the outer part 18 of the femaledie 11. It has been found in practice that the heating element around the outer part of the fe`.

male die will properly and effectively heat kp' f' the entire die mechanism. 4

\ After the sheet of paper has been formed, pressed and ironed, the male die i'smoved away from the female die allowing-the fingers and inner parts of the die parts to eject the cupped sheet ofpaper from the ldie mechanism. i

Having describedr only vav preferred em# bodiment of my invention, I donotfwish to limit myself tothe specific details .hereinabove set forth, but wish to Vreserve to myself any changes or variations that may appear to those skilled in the artv or that mayfall within the scope of the followingclaims.

Having described a preferred 'form' of'my invention, I claim:` 1

1. In a machine for cupping paper, two cooperating die parts, one of the die parts including two relatively movable paper cupping portions normally spaced apart and adapted to fit together, `and means for moving the die parts together so that said por-y tions cooperate with the otherydie part to successively cup different portions ofl thel paper in a: single operati-on of the machine. A '2. In a machine for cnpping paper, two cooperating die parts, one of the vdie parts' in'-v cluding two relatively movable paper'c'upping portions normally spaced apart and one adapted to'seat on the otherto form -a continuation thereof, means for moving the die parts together so the said portions cooperate v with the other die part `to successively cup` operation of the machine. d n

v3. `In ay paper cupping machine,`two cooperating die parts, means" for moving the adjacent portions of thev paper in a` single die parts together withv pressure tocupthe f paper, and means for causing relative rota-l tion between the die parts while they press the paper to iron the paper.

4. yIn a paper clipping machine, twocooperating die parts',` one of rthedie parts lli 5 L1nV a paper cupping machine, two cooperating die parts, means for moving the die parts 'together with pressure to cup the paper, means for heating the die parts, and means for causing relative rotation between the die parts while they press the paper to iron the paper.`

f 6. 1n a paper cupping machine, two cooperating die parts, one of the die parts including a plurality of `relatively movable paper cupping portions adapted to successively cooperate with` the other die part to successively cup dilierent parts of the paper upon movement of the die parts together, means for heating the die parts, and means forv 'causing relativeA rotation between cooperating vdie parts to ironl the cupped paper.

7. In a paper cupping machine, two relatively movable cooperating die parts, one ot the die parts including two relatively movable paper cupping portions adapted to successively` cooperate Awith the other vdie part to successive-ly cup different parts of the paperupon movement ot the die parts together, and 1in gers carried by the die parts to cooperate to hold the paper while the die parts Iare moving together and before the die parts operate on itl 8. 1n combination two cooperating die parts, lone of the die parts comprising a plurality of relatively movable portions adapted to operatively engage the other die part at different times during movement of the die parts together, I means `for moving the die parts together and holding the-m in pressure engagement, and means forrotating one or the die parts relative to the other while they are held in pressure engagement.

9. In a paper cupping machine, a'female die comprising an outer portion and an innerportion normally spaced'from the outer portion and adapted to be actuated tov form continuationof the outer portion, and a male die vcomprising an outer portion, and an inner port-ion normally spaced from the outer portion and adapted to be actuated to form, a continuation of the outer portion, the .male and female dies being shaped and adapted to be movedgtogether so that the inner portions cooperatetocup a portion of the paperfand actuate each other so that the outer portions cooperate to cup another portion of the paper. I

10. Ina papercupping machine, a male die, a female die, each of said dies comprising an outer part, an inner part normally eX- tendmgrom the outer part and adapted to be actuated to form a continuation of the outer part, anda central finger normally ex tending from the inner part( and .adapted to be actuatedto a position where itdoes not extend/from the inner part, and means for moving the dies together causing first the fingersy to cooperate to hold apiece of paper and actuate eachother, then the inner parts to cooperate to cup a portion of the piece olb paper and actuate each other, and then the outer parts to cooperate to cupl another portion of the piece of paper.

11. 1n a paper cupping machine, a male die, a female die,"each of the dies comprising an outer part and an inner part normally extending from the outer part and adapted to be actuated to a position where it forms a continuation of the outer part, means ttor actuating the dies so that the inner parts cooperate to cup a portion of the paper and actuate each other and then the outer parts cooperate to cup another portion ofthe paper adjacent the portion of the paper cupped by the inner parts, and'means for rotating one of the dies relative to the other.

12. 1n a paper cupping machine, a male die, a female die, each of the dies comprising an outer part and an inner part normally extending from the outer part and adapted to be actuated to a position where it forms a continuation of the outer part, means ior actuating the dies so that the inner parts cooperate to cup a portion of the paper and actuate each other and then the outer parts cooperate to cup another p0rtion of the paper, means for heating the dies, 'and means vfor rotating one of the dies relative to the other when the dies are comi pletely actuated to iron the paper.

13. In a machine of the character vdescribed, a frame, two opposite-ly disposed die parts carried in spaced relation by the frame, two die parts connected together and movably carried by the trame so that they can be actuated so that each one cooperates with `one ofthe lirst mentioned die parts, and a single operating mechanism for said movable die parts.

14. In a machine ofthe character described, a frame, two oppositely disposed. die partscarried in spaced relation by the frame, a cross head slidably carried by the frame between said die parts, die parts mounted on opposite sides of the cross head, and means for reciprocating'the cross head so thateach of the die parts thereon cooperates with one of the first mentioned die parts. i i

15. 1n a machine of the character described, two cooperating dies one adapted to be moved relative to the other, a crank mechanism having a reciprocating movement greater than the movementy of the movable die, and means connecting the crank mechanism and movable die so that the crank mechanism moves the movable die into engagement with the othery die and then holds it in pressure engagement ywith the other die. l v 16. In a machine of the character described7 a Jtrame, two oppositely disposed die parts carried in spaced relation by the frame, two die parts connected together and movably carried by the frame so that they can be actuated so that each one cooperates with one of the first mentioned die parts, and a single operating mechanism for said movable die parts, said mechanism embodying yielding means whereby it operates yto bring the Cooperating die parts into yeld- 10 ing pressure engagement. y

In Witness that I claim the foregoing I have hereunto subscribed my name this 19th day of May 1921.

WALTER R. SCHINDLER.