US3031907A

US3031907A - Sheet perforating devices

Info

Publication number: US3031907A
Application number: US570355A
Authority: US
Inventors: Marshall E Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-03-08
Filing date: 1956-03-08
Publication date: 1962-05-01
Anticipated expiration: 1979-05-01

Description

May 1, 1962 M. E. STEWART SHEET PERFORATING DEVICES 5 Sheets-Sheet 1 Filed March 8, 1956 M45H4AL 5. 575144427,

IN VEN TOR.

May 1, 1962 M. E. STEWART 3,031,907

SHEET PERFORATING DEVICES Filed March 8, 1956 5 Sheets-Sheet 2 FIG. 4.

MRS/44; 5 572714427;

IN VEN TOR.

Isl/W w firraemsn y 1962 M. E. STEWART 3,031,907

SHEET PERFORATING DEVICES Filed March 8, 1956 5 Sheets-Sheet 3 Mflesy/ux. 5. 572M427;

IN VEN TOR.

May 1, 1962 M. E. STEWART 3,031,907

SHEET PERFORATING DEVICES Filed March 8, 1956 5 Sheets-Sheet 4 FIG. 7

z L l 9 50 FIE-.12.

55 MARS/7644A 5 572714427,

I INVENTOR.

BY I 11- Wag/L May 1, 1962 M. E. STEWART SHEET PERFORATING DEVICES 5 Sheets-Sheet 5 Filed March 8, 1956 IIIi]IIIIIIIllI/I/I/IIIIIIIIll/IIIIII/IIIIIIIII/IIIII INVENTOR.

I firraewavr flit rates 3,ii3i,9ii7 Faterrted May 1, 1962 3,031,937 SHEET PERFURATENG DEVEQES Marshall E. Stewart, 1011 Ave. A, Redondo Beach, Calif. Filed Mar. s, 195e, 5261. No. s'iasss 13 Ciaitns. {@i. 253 146) This invention relates to perforating devices and more particularly to perforating devices adapted to pattern perforate sheet and strip materials and still more particuiarly to perforating devices adapted to pattern perforate sheet and strip material utilizable as picture projection screens to adapt same for theprojection of sound waves therethrough.

The object of the invention is to provide an improved pattern perforating device for sheet and strip materials.

Another object is to provide an improved pattern perforating punch for perforating devices.

Still another object is to provide a pattern perforat ing device for sheet and strip material which is adapted to perforate the sheet or strip material in a plurality of end and side aligned punching operations with each punch operation producing a parallel sided perforated pattern having spaced peripheral punch holes aligning with the spaced peripheral punch holes of an adjacent end and side aligned pattern to form an unbroken continuation of the pattern on the strip of sheet material.

A further object is to provide a sheet perforating device specifically adapted to pattern perforate sheet and strip material suitable for utility as picture projection screens thereby to adapt the screen for the projection of sound waves therethrough.

Another object is to provide an improved pattern perforated picture projection screen.

Other objects will be apparent as the invention is more fully hereinafter disclosed.

In accordance with these objects I have devised an improved pattern perforating device for pattern perforating sheet and strip material, one specific embodiment of which is illustrated in the accompanying drawings, in which device the sheet or strip material is pattern perforated over all or any desired area thereof, in a suc- I each punch operation producing identical substantially A parallel sided perforated pattern of a determined size having spaced peripheral perforations therein adapted to align with the spaced peripheral perforations of an adjacent end or side aligned pattern to form a continuation of the pattern in the strip or sheet material.

In the device of the present invention the sheet or strip material is sustained for intermittent movement in a horizontal plane through a perforating zone extending across the sheet or strip transverse to the direction of sheet or strip movement and a punch means is provided to perforate each transverse section of the sheet or strip material moved into position in the perforating zone or any desired part thereof in a succession of equisized end aligned parallel sided patterns of perforations the peripheral perforations of which are so arranged as to align with the peripheral perforations of an adjacent end or side aligned pattern of perforations to form therewith a continuation of the pattern.

The perforating device of the specific embodiment has been devised particularly for the pattern perforating of sheet and strip material utilized in the forming of picture projection screens to adapt the screen for the projection of sound waves therethrough. It is to be understood, however, that the invention is not limited in its scope or utility to picture projection screen material.

Heretofore in the art of picture projection screens two main types of screens have been produced. One type is translucent for rear picture projection and the other type is opaque for front picture projection. The'latter type is the one most generally adapted for theater screens and in this type of screen it has been found necessary, for realisnnto perforate the screen to adapt the-screen for the rear projection of sound waves therethrough. As the size of such perforatedtheater screens increased, however, the perforated areas of the screen became more apparent to the viewer and it has been found necessary to perforate the screen over substantially its entire viewing area in a substantially unobservable pattern con sisting of uniformly close spaced small diameter perforations providing the minimum loss in reflected radiation from the viewing face of the screen andthe minimum in terference with sound waves passing through the screen.

One piece of seamless theater screens of substantially any desired large size may now be produced by spray. methods utilizing synthetic'resins, plastic and rubberoid compounds in combination with filler and coloring compounds. The particular spray method or spray composition employed in the forming of these one piece seamless screens forms no part of the present invention anda disclosure of same is unnecessary for one skilled in the art to understand the present invention. In general the seamless screen produced by spray methods is fl'e'iiible enough to be rolled upon a large-diameter roller and strong enough to be sustained taut about it's periphery in a vertical plane without distortion. Theater-screens vary widely in height and width but may be as high as 40 feet and as Wide as 70 feet. The thickness of the one piece screens also may vary widely but in general the larger sized screens have a thickness approximating .015 inch.

The device of the specific embodiment has been adapted to perforate this type of seamless picture projection screen material in a uniform pattern having perforations of .042 inch diameter disposed in a diagonal diamond shaped pattern having 36 equ'i-spaced perforations per square inch with the pattern extending over substantially the entire viewing area of the screen. This pattern of perforations has been found to provide with picture projection screen material comprised of the plastic rriix tures above identified the minimum loss in reflected radiation from the viewing surface thereof with the minimum interference with the projection of sound waves throughthe screen. With other types of picture projection screen material and other compositions comprising the same the perforated pattern employed may vary either as to the diameter of the perforations or as to the number of perforations per square inch or as to the pattern arrangement of the perforations employed therein without departure from the invention;

Before further disclosure of the specific embodiment of the present invention reference should be made tothe accompanying drawings wherein;

FIG. 1 is a side elevational view of the sheetlperforating device of the present invention;

FIG. 2 is avertical section of one end of the device taken along the vertical plane 22 of FIG. 3;

FIG. 3 is a cross sectional view taken along plane 33.

FIG. 8 is a sectional View taken along plane 8 8 of" FIG. 7;

FIG. 9 is an enlarged broken away cross sectional view taken along plane 9-9 of FIG. 7;

FIG. is a plan view illustrating the perforating pattern of the perforating punching head of the device of the present invention;

FIG. 11 is a sectional view taken along plane 11-11 of FIG. 4;

FIG. 12 is a sectional view taken along plane 1212 of FIG. 4; and

FIG. 13 is a schematic view illustrating the compressed air actuating means adapted to operate the perforating head of the present invention.

Referring to the drawings it is believed apparent that the device of the present invention is provided with a punching head denoted generally by the letter H mounted on a carriage, denoted generally by letter C, rollably sustained by wheels ww and w'w on parallel tracks T-T' with a punch P sustained on the punching head H to be actuated vertically by an actuating means, generally denoted by the leter A, towards and away from anvil plate, generally denoted by the letter K, sustained horizontally on the punching head H below the punch P with the space gap between the punch P and the anvil plate K defining a horizontally disposed punching plane extending over the entire distance of travel of the head H and carriage C along the tracks T-T'.

In combination with the head H, and its associated instrumentalities, the device is provided with a means to feed the sheet S through the horizontally disposed punching zone defined by space gap between the punch P and the anvil K in such manner as will provide for the successive perforation of any part or all of contiguous transverse areas of the sheet by the punch P in a succession of end andside aligned punching operations. The means to feed the sheet S through the horizontally disposed punching zone comprises the reels R and R horizontally sustained in parallel spaced relation on opposilte sides of the punch P by the trestl support means F- to be rotatable about their respective horizontal axis by an end support means general-1y denoted by the letters E-E'.

Also in combination with the above identified instrumentalities the device of the present invention includes a brake means B-B, one on the end of each of the reels R and R to control the rotation of the reels R and R a means D to control the movement of the carriage C along the tracks TT' and guide bars G and G to align each transverse section of the sheet S horizontally in punching position under the punch P in the space gap between punch P and anvil plate K.

As may be noted in FIG. 1 the length of the reels R -R is many times the Width of the punching head H. In the specific embodiment shown punch P of the punching head H has an actual punching area of 6" x 6" and the length of the reels R R is about 35 feet. The length of the reels R and R however, may be varied widely without departure from the invention as it merely limits the maximum Width sheet or strip material utilizable by the device.

The sizcof the punch P also may be widely varied without departure from the invention depending upon the material to be punched, the punching power available and the number of punching pins carried by the punch P of the punching head H.

The pattern punching device of the specific embodiment shown in the drawings was designed for the pattern perforating of relatively large sized one piece seamless picture projection screens used in theaters, the screen be ing comprised of an opaque plastic composition of the type above identified having a thicknessof about .015 inch. In this type of sheet material experiments have determined that the punching pressure required to punch a hole of about .042 inch diameter in the material approximated 8 pounds.

This punching pressure will vary with variation in the plastic composition employed in the forming of the sheet S. Experiments have further determined that a pattern of equi-spaced holes of this diameter having approximately 36 holes per square inch arranged in a diagonal diamond shaped pattern was substantially undetectable by the viewer at the usual minimum viewing distance provided in most theaters. Experiments have further determined that this size perforation arranged in this type of pattern provided little, if any, interference to the projection of sound waves through a screen comprised of this type of plastic material.

The punching head H Was designed to provide for the pattern punching of all or of a selected portion of a one piece seamless screen of this thickness and composition in a uniform pattern having equi-spaced .042 inch diameter holes in a diagonal diamond shaped pattern having 36 holes per square inch. In the design of this punching head the means A adapted for actuating the punch P is a reversible compressed air cylinder 10, arranged to actuate pivoted lever arm 11 to move the punch rod 12 downwardly a determined punch stroke in one direction of cylinder 10 actuation and reversely upward to first position onthe reverse actuation of the cylinder It Any other equivalent means for actuating the punch P may be substituted for the means shown without departure mm the invention.

In the specific embodhnent shown the cylinder 16 is actuated by compressed air at 125 pounds pressure from tank i3 (PEG. l3). Compressed air from the tank 13 passes through the dust and oil filter traps 14-15 into lines id-17 to actuating valve V and reversing valve V respectively. When button 18 of the valve V is pushed inwardly manually the compressed air at 100 pounds pres? sure in the line i6 passes into line 19 and toone end of the cylinder it to actuate the lever 11 and the punch rod 12 in the direction indicated by the arrows. As the punch rod 332 is thereby moved downwardly the adjustable stop means moves therewith to a position actuating button 21 of the reversing valve V Actuation of valve V passes the compressed air in line 17 into line 22 and into valve V in such manner as to shift the valve V back into first position with the air pressure passing into line 23 and into the opposite end of the cylinder It} to reverse the cylinder 1% and to return lever arm 11 and the punch rod 12 to first position and to hold rod 12 in this position until button 13 is again actuated manually.

The punch P attached to the bottom end of the punch rods 12'l2 is limited as to size by the punching power provided by the cylinder 1d and lever arm 11. In this instance with each punching pin requiring about 8 pounds punching pressure to perforate a hole in the specific screen material described and with each square inch of pattern perforated area containing 36 holes a pressure of 288 pounds is required for each square inch of perforated area. The punch P is provided with a total number of 1380 punch pins equi-spaced over a six inch square area which would require a punching pressure of 11,040 pounds which is beyond the power possibilities of the cylinder it) and lever arm 11 at the air pressure employed. However, I have discovered that by providing a plurality of di erent length punch pins with each length being equispaced on the punch P the punching pressure required may he reduced by the number of different pin lengths employed.

In the specific example shown I employ four (4) different lengths of punch pins, each length being equispaced over the 6" x 6 square area of the punch I, thereby reducing the punching pressure required from 11,640 pounds to 2,760 pounds which is well within the power limits of cylinder it) and lever arm 11. By this arrangement of punch pins the 6 square inch area covered by'the punch P is perforated in one punch stroke in four (4) successive punching operations.

One of the features of punch P is that the pins 55 are so arranged in the punch P that the peripheral pins along each side of the punch P form spaced perforations that align with the spaced perforations formed by the pins on the opposite side of the punch P to form an unbroken continuation of the pattern in contiguous end and side aligned punch areas.

Referring now to FIGS. 1, 4, 5 and 6 it will be noted that the punching head H mounted on the carriage C is comprised essentially of a yoke (denoted by the letter H) vertically sustained on the carriage C, having the punch P mounted on the upper jaw and the anvil plate K mounted on the lower jaw with the means A mounted on the top of the yoke or head H. The unwinding reel R is sustained horizontally through the throat of the yoke or read H and the Winding reel R is sustained in parallel spaced relation to the reel R :but at a lower horizontal level adjacent to the opposite side of the punch P with a tensioning guide bar G disposed in parallel spaced relation thereto having an upper surface, over which the sheet S passes, lying in the same plane as the punching plane provided by the space gap between punch P and anvil plate K.

it is believed clear from FIG. 4, for example, that each six (6) inch transverse section of the sheet S may be sequentially moved into punching position under the punch P by appropriate rotation of reels R and R and that the entire length of each six (6) inch transverse section of the sheet S may be pattern perforated by the punch P as it is moved, forwardly or reversely, along the tracks TT in successive end aligned six (6) inch movements between each punch actuation in an edge aligned pattern and that the successively punched end aligned patterns in each transverse section may be similarly side aligned to form a continuation of the pattern along the entire length of the sheet screen material.

The means D provided to limit the forward or reverse movement of the punch P to a distance bringing the rear edge of the punch Pinto alignment with the forward edge ofthe previously punched area of the sheet S thereby to edge align each successively punched pattern area consists of the means shown more particularly in FIGS. 4, ll and 12; This means D comprises essentially a. shaft 39 vertically sustained by bracket 31 on the carriage C to be rotatable about its axis. A gear 32 is mounted on the bottom end of the shaft to engage rack 33 horizontally mounted in parallel spaced relation to the track T With this arrangement any movement of the carriage C along the tracks T-T will rotate shaft 30" about its axis inone direction or the other. On the other end of the shaft 30 is mounted disc 34 to rotate therewith. In the upper face of this disc 34 (see FIG. 11) is provided an annular traclrway 35 limited as to its length by spaced holes 36-36 to the precise distance of forward and reverse movement desired in carriage C to bring the rear face of the punch P into alignment with the forward edge of the previously punched pattern of sheet S.

A spring urged stop pin 37 is vertically sustained to be axially moveable against the urging of the spring means 38 by the toggle means 95, 96, 97 and 98 manually operable by the handle lever 99, with the free end of the pin 37 riding in the trackway 35. With this arrangement the forward and reverse emovement of the carriage C along the tracks T--T is limited to the length of the trackway 35 lying betweenthe holes 36 provided therein to receive the pin 37. The carriage C may be moved freely along the entire length of the tracks T'T' by manually restraining the pin 37 from being spring urged into stop position in the holes 36. Any alternative means for obtaining the same result may be used without departure from the invention.

Referring now more particularly to H68. 6, 7, 8, 9 and 10, the details of construction of the punch P may be recognized. The punch P is comprisedof a base plate 40 adapted to be secured for vertical up and down movement on the end of punch rods 12-12 by a means such as set screws 411-41, a punch pin anchoring plate 42' and means, such as bolts 43, to secure the same to the base plate 40,

a punch pin guide stripper plate 44 and means such as depending side plates 45-45" to sustain the guide stripper plate 44 in parallel spaced relation to the

plates

40 and 42 and in parallel spaced relation to the anvil plate 50 (K) mounted on post 51 forming an extension of the carriage C and a part of the yoke or head H. The space gap between the anvil plate 50 and the guide stripper plate 44 forms the perforating plane and pathway traversed by the sheet S between reels R and R As may be noted in FIGS. 7 and 8 particularly the punch pin anchoring plate 42 is provided with a plurality of equi-spaced holes forming the desired perforating pattern. in this specific embodiment the punch pin holes each have a diameter closely approximating .042 inch diameter and are equi-spaced in a diagonal diamond shaped pattern providing 36 holes per square inch and a total number of 1380 holes in the 6 inch by 6 inch square area of the anchoring plate 42.

The punch pins 55 are comprised of any suitable metallic composition such as, for example, piano wire. In the forming of the punch pins 55 from piano wire the wire is square cut into the desired length and one end of the wire length is bent over at a right angle to form a head 56 thereon. As indicated in H6. 9, in this specific embodiment the punch pins 55 are provided with four (4) different lengths (55a, 55b, 55c and 554!) with each length punch pin distributed uniformly in equi-spaced relation in the openings provided in the anchoring plate 42. The object of this plurality of lengths of the punch pins 55 is to limit the perforating power required at any one time to one-fourth of the total required during each stroke of the punch P. The provision of a plurality of different length punch pins 55, each uniformly dispersed over the punching area of the punch P also materially lessens the punching shock on the sheet S and materially reduces pattern distortion. In picture projection screens pattern perforated for the projection of sound waves therethrough any non-uniformity in the perforating pattern is readily discernabie by a viewer.

Referring now to H6. 10, the perforated pattern provided by the punch P in the sheet S is illustrated in this figure. It is to be noted that the perforations about the periphery of the pattern are so arranged that the spaced perforations along the pattern edge a will align with the spaced perforations along the pattern edge b and the spaced. perforations along the. pattern edge c will align with the spaced perforations along the pattern edge d to form a continuous and unbroken pattern in the sheet S, as successive end and side aligned punched areas are formed in the sheet S in successive transverse areas.

The forming of successive and aligned pattern punches in the sheet S in each transverse section is obtained by means of the, control means D. The forming of side aligned pattern punches in the next transverse sectionof the sheet Sis obtained by rotating the reels R and R sufficiently to locate the next adjacent six inch transverse section of the sheet S in punching position under the punch P and locking the section in position by means of thebrake means B-B' under suflicient tension to hold the same tautl'y in the horizontal plane defined by the guide. bar G and reel R Referring now to FIGS. 2 and 3, the details of the end support means E-E for the reels R and R may be noted. The reels R and R are each comprised of light Weight tubular material such as seamless aluminum tubing and the means E-E is provided in each end of each reel R and R to rotatively sustain the tubular reels R and R in a non-sagging horizontal position on the trestle supports F-F.

The non-sagging horizontal support means for the tubular reels R and R must be variable to permit adjustment of the means as the Weight of the sheet S on the unwinding reel R decreases and as the weight of the sheet S on the winding reel R increases.

To obtain these desired results i have provided for each end of the reels R and R the variable non-sagging sup port means illustrated with particularity in FIGS. 2 and 3. In this means I provide a rotatably fulcrumed lever arm insert consisting of a tube shaft 7! having spacer plates 71 and 72 secured thereon having an outside diameter fitting closely the inside diameter of the tubular reel R (or R thereby to locate the tube "It? centrally within the reel R Spacer plate 71 is secured to the reel R by means of a plurality of counter sunk bolts 73 to be axially rotatable with the reel R A plurality of triangular reinforcing webs 74 are concentrically mounted in spaced radial relationship on the outer surface of the tube '70 and are end secured to the inner surface of spacer plate 71. The overall length of the insert lever arm may vary widely but I have found that the most effective length is that locating spacer plate 72 at a point approximating onefourth of the length of the reel R The extending end of tube 79 is rotatably fulcrumed by means of an annular bearing 80 side secured to the outer surface of spacer plate 71 to be rotated therewith and the extending length of tube-7t is reinforced by radially extending triangular fins 81 weld-secured to the tube 76 and to the bearing St Roller supports 8'283 are sustained on the cross bar 84 by an adjustable support 85 so that each end of the reel R may be sustained with the rotating axis of the reel in a horizontal plane adjacent the horizontal plane of the punching zone provided between punch P and anvil plate K.

The means to actuate the lever arm insert on its rotatable fulcrum provided by the annular bearing 86' and rollers 82-83 to straighten the reel R and to overcome sag therein consists of a means to apply a variable downward pressure on the extending end of the tube 7 t thereby to cause the tube '76 to pivot on its fulcrum and to cause spacer plate 72 to press upwardly against the inner surface of the reel R sufficiently to remove the sag from the reei R The particular means to apply this pressure shown consists of a rod or stub shaft 86 rotatably mounted in spaced bearings 37-38 and a turn buckle means 89 having one end anchored to the floor and the other end secured to the rod or stub shaft 86 to apply the desired or required variably downward pressure onto the rod or shaft 86. Any other alternative means to apply the required variable downward pressure to the rod or stub shaft 86 or directly to the lever arm tube shaft 70 may be used without departure from the invention.

It is believed apparent that the turn buckle tensioning means shown is widely variable as to the amount of pressure exerted as to meet substantially any condition of sag present in the reel R and that by the provision of such a rotatably fulcrumed lever arm insert and variable tensioning means therefor in each end of the reels R and R the said reelsmay be sustained under variable load conditions in a non-sagging horizontal position as is desired by this support means.

The brake means B provided at one end of each reel R and R to hold the reels R and R in any desired position of axial rotation with the length of sheet S lying therebetween in sufficient tension to maintain the length in horizontal coincidence with the punching plane between the guide bar G and R may be widely varied without departure from the invention.

In the specific embodiment shown the brake means B comprises a split strap 90-91 having one end of each strap secured together and anchored to the frame F adjacent to and under the end of the reel R by any convenient means such as a threaded bolt means 92. The opposite ends of the strap are secured together by a manually operable means such as a bolt 93 and thumb screw 4 to actuate the straps 90-91 into and out of frictional engagement with the outer surface of the reel R The provision of one of these brake means B at one end of each reel R and R will maintain the reel in any desired position of axial rotation during the pattern punching of each transverse section of the sheet S with the length of the sheet S extending therebetween maintained under tension between the reels R and R in a plane coinciding with the punching plane. Any alternative brake means providing this desired result may be employ without departure from the invention.

It is believed apparent from the above disclosure of the present invention that the pattern perforating device of the present invention is adapted for the pattern perforating of sheet material of substantially any perforable composition and thickness, metallic and non-metallic, and that the geometric pattern arrangement provided in the specific embodiment for perforating picture projection screens may be widely varied without essential departure from the invention. It is also believed apparent that the various operating elements of the device of the specific embodiment each may be widely varied without essential departure from the invention and all modifications in, changes of and departures from the pattern perforating device of the present invention as herein disclosed generically and specifically and as illustrated in the drawings in one specific embodiment are contemplated as may fall within the scope of the following claims.

What I claim is:

1. A perforating device for perforable sheet and strip materials, said device comprising in combination a punch and an anvil and unitary support means vertically sustained on a carriage sustaining the punch and anvil in vertical close spaced alignment with a horizontal perforating zone defined therebetween with said anvil mounted on the lower portion of the support means and the punch mounted on the upper portion of the support means, guide means for mounting said carriage thereon to engage it to sustain the carriage, said carriage being freely movable relative to said guide means to actuate the vertically aligned punch and anvil simultaneously forwardly and reversely in a straight line horizontal path of determined length, a rack mounted in parallel spaced relation to the guide means, a gear sustained on said carriage in a position to engage said rack and to be rotated thereby, a shaft connected to said gear to be rotated there by, a cam connected to be rotated by said shaft and a releasable spring urged pin stop means limiting the rotation of said cam to that representing the precise distance of travel of said carriage along said guide means required for end to end alignment of said punch to limit the distance of travel of the punch and anvil along said path to a distance providing successive end to end movements'of the punch and anvil along said path, means to feed successive transverse sections of a length of the sheet and strip material through the perforating zone defined by the space gap between said punch and anvil in a direction at right angles to the said path, said means including means sustaining each transverse section in substantial horizontal coincidence with the said perforating zone, and means to actuate said punch into perforating engagement with the anvil at any position of end to end movement along said path.

2. A perforating device for perforable sheet and strip materials, said device comprising in combination a punch and an anvil and a yoke vertically sustained on a carriage sustaining the punch and anvil in vertical close spaced alignment with a horizontal perforating zone defined therebetwcen with said anvil mounted on the lower jaw of the yoke and the punch mounted on the upper jaw of the yoke, a trackway and wheels mounted ,on said carriage to engage said trackway and to sustain the carriage movably thereon to actuate thevertically aligned punch and anvil simultaneously forwardly and reversely in a straight line horizontal path of determined length, a rack mounted in parallel spaced relation to the trackway, a gear sustained on said carriage in a position to engage said rack and to be rotated thereby, a shaft connected to said gear to be rotated thereby, a cam connected to be rotated by said shaft and a releasable spring urged pin stop means limiting the rotation of said cam to that representing the precise distance of travel of said carriage along said trackway required for end to end alignment of said punch to limit the distance of travel of the punch and anvil along said path to a distance providing successive end to end movements of the punch and anvil along said path, means to feed successive transverse sections of a length of the sheet and strip material through the perforating zone defined by the space gap between said punch and anvil in a direction at right angles to the said path, said means including means sustaining each transverse section in substantial horizontal coincidence with the said perforating zone, and means to actuate said punch into perforating engagement with the anvil-at any position of end to end movement along said path.

3. The device of claim 1 wherein said punch comprises a base plate having a plurality of punching pins mounted thereon in a desired straight sided and four sided geometric pattern, the peripheral pins along each straight side of the geometric pattern being arranged to form spaced perforations aligning alternately with the spaced perforations formed by the peripheral pins on an opposite side thereby to provide a continuation of the geometric pattern in contiguous end and side aligned perforated pattern areas in the sheet.

4. The device of claim 3 wherein a pin guide stripper plate is mounted in determined spaced relation to the said base plate, said guide stripper plate having a plurality of pin guide bore openings therein equal in number to the number of pins mounted in the base plate and aligned axially in the same geometric pattern provided by the said pins, said openings each having a diameter approximating but slightly larger than the diameter of the pin slidably seated therein.

5. The device of claim 3 wherein the said pins consist of pins having a plurality of lengths with each length pin uniformly distributed in the geometric pattern on the base plate surface.

6. The device of claim 4 wherein the said guide stripper plate has a thickness at least approximating the difference between the longest and shortest length of said pin and wherein the spacing between the said base plate and guide stripper plate approximates but is less than the length of the shortest pin.

7. The devce of claim 1 wherein said anvil is provided with a plurality of substantially conical bore openings therein and therethrough arranged in the same geometric pattern as provided for the said pins on said base plate with the smaller diameter of each bore opening approximating but larger than the diameter of the pin seating therein.

8. The device of claim 1 wherein the anvil is immovable and the punch vertically movable towards and away from the anvil.

9. The device of claim 8 wherein means are provided for actuating the said punch into and out of engagement with the said anvil with suflicient force to pattern perforate a sheet of perforable material disposed in the space gap therebetween.

10. The device of claim 9 and means to movably sustain a sheet of perforable material to be moved into and out of punching position in the space gap between the punch and anvil.

11. The device of claim 10 and means to movably sustain a sheet of perforable material with a transverse section thereof lying in the horizontal plane coinciding with the space gap between the punch and anvil and means actuating the said punch to traverse the said transverse section in a series of end aligned punching operations.

12. The device of claim 1 wherein said punch is provided with a plurality of punching pins mounted thereon in a determined straight sided geometric pattern with the peripheral pins on each straight side being arranged to form spaced perforations aligning alternately with the spaced perforations formed by the peripheral pins on an opposite side thereby to form an unbroken continuation of the geometric pattern in adjacent end and side aligned perforated patterns in the sheet and strip material and said anvil being provided with a plurality of pin receiving recesses arranged in the same geometric pattern equal in number to the number of punching pins mounted on said punch.

13. The device of claim 1 wherein a plurality of pins of different lengths are mounted on said punch with the different length punching pins each being uniformly dispersed in the said straight sided geometric pattern and wherein a guide stripper plate is sustained intermediate the punch and anvil and in spaced relation to the said punch to be movable therewith, said guide stripper plate being provided with a plurality of pin guide bore openings therein arranged in the same geometrical pattern with one bore opening for each pin, the thickness of said guide stripper plate being that approximating but larger than the difference between the longest and shortest length punching pins.

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