Perforating apparatus

May 21, 1940.

K. J. DOLLAHITE 2,201,481

PERFORATING APPARATUS

Filed.Jan. 12, 1938 3 Sheets-Sheet 1

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ATTORNEY

May 21, 1940.

K. J. DOLLAHITE

PERFORATING APPARATUS Filed Jan. 12, 1938

2,201,481

Sheets-Sheet 2

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ATTORNEY.

May 21, 1940.

K. J. DOLLAHITE

PERFORATING APPARATUS Filed Jan. 12, 1938 3 Sheets-Sheet 3

2,201,481

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INVENTOR

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ATTORNEY

Patented May 21, 1940

2,201,481

UNITED STATES PATENT OFFICE

2,301,481 PERFORATING APPARATUS Kenneth J. Dollahite, Fort Worth, Tex. Application January 12, 1938, Serial No. 184,629

Claims.

This invention relates to the art of printing, and it has particular reference to apparatus for perforating paper stock, card board, etc., commonly known to the printing art, and its prin5 cipal object resides in the provision of a combination of mechanism calculated to operate upon paper stock, effecting economy in labor and other production costs, and executing such operations with precision and celerity.

The principal object of the invention resides in the provision of an arrangement of mechanical parts embodying a coordinating assembly of a stock or paper elevator; a pair of steel feed rollers; a multiple of perforator-pin discs and perforator-pin bars; an equal multiple of rubber discs and a rubber roller; a pair of steel ironing or mangle rollers and a stock delivery.

In this machine the paper is fed, several sheets at a time, to two front guides and one side 20 guide. In proper timing the top feed roller drops into position across the sheets of paper with sufficient tension to carry the sheets between the multiple of perforator-pin discs and an equal multiple of rubber discs; thence between 25 a pair of ironing or mangle rollers.

As the sheets pass through the perforator-pin discs and the rubber discs, the sharp perforatorpins pass through the paper into the rubber dies. The perforator-pin discs are adjusted to 30 revolve over the rubber discs with sufficient tension to press the pins through the paper, the rubber discs being hard enough to resist the paper, yet soft enough to permit the entering qf the points of the perforator-pins.

A lateral or cross perforation is accomplished on this machine by means of a perforator-pin bar, supported at each end by annular heads, rigidly attached to a steel shaft, being supported in the frame work at right angles to the perfora40 tion accomplished by the perforator-pin discs. A rubber roller, or steel shaft, with a rubber covering or sleeve is positioned under and parallel with the perforator bar. As the sheets pass between this perforator bar and the rubber roller, 45 the same effect is accomplished as when passing between the perforator discs .and rubber discs.

This construction permits the accomplishing of as many horizontal and cross perforations as is desired in the same operation, depending upon 50 the number of perforator discs and perforator bars with which the machine is equipped.

After the sheets are perforated, they pass between the ironing rollers, which are adjusted with sufficient tension to flatten the bur resulting 55 on the under: side of the sheets.

(Cl. 164—99) .

It has been found that sheets of paper, when perforated in this manner, will not stick together and may always be perforated before being printed, even though the perforation be in such a! position as to be under the sucker feet of an 5 automatic press.

The machine is so constructed as to permit of a “strike” in any position on the sheet of either the horizontal or cross perforations in the same operation. 10

The chief advantages of this method of perforation are the extremely low maintenance cost of the machine, the accomplishment of horizontal and cross perforations in the same operation, arid the fact that the sheets may always be perforated 1# before being printed.

While the foregoing objects are paramount, other and lesser objects will become manifest as the description proceeds taken in connection with the appended drawings wherein: 20

Figure 1 is a perspective illustration of the invention.

Figured is a diagrammatical view of the rollers and perforating discs as employed in the preferred form of the invention.25

Figure 3 is another diagrammatical view similar to Figure 2 but illustrating the transverse perforating device used in the invention.

Figure 4 is a perspective view of a perforating disc particularly illustrating the pins.30

Figure 5 is a fragmentary portion of the transverse perforating device showing a portion of the supporting discs in cross-section..

Figure 6 is a perspective view of the transverse perforating arrangement, and35

Figure 7 is an illustration of a modified form of roller opposing the perforating discs.

Figure 8 is a vertical sectional view of the form of the invention illustrated in Figure 1.

Figure 9 is a taken on lines 9—9 of Figure 8, 40 and

Figure 10 is a fragmentary view of a portion of the feed roller mechanism.

An object of the invention being to provide suitable means of accomplishing one or several ⁴³series of perforations at one time on a sheet of paper stock, it is desirable to include in its structure a synchronized unit operating, transversely of the sheet of stock and engaging the latter at intervals’determined by adjustments on the unit 50 itself as well as its actuating elements.

Accordingly, therefore, the invention consists primarily of a frame I supporting a vertically adjustable feeding table 2 upon which a quantity of the paper stock is placed so that the topmost ³³

2,201,481 sheet may be engaged by an arrangement of feed rollers 3. The table 2 is connected to the frame I through a pair of rack bars 4 whose teeth are engaged by pinions S secured to the ends of the shaft Ί which extends through the frame 1 and journalled thereto.

The shaft 7 projects from the frame I, preferably on the left side thereof, as illustrated in Figure 1, and a hand wheel 8 is keyed thereon providing means for rotating the same. The racks 4 are slidably engaged in vertical guides 9 arranged within opposing sides of the frame I, as illustrated in Figures 1, 8 and 9. A deterrent or brake ! 0 engages the face of the wheel 8 and is supported by a lever I 1 whose lowermost end is pivoted to the frame ί at a. Tension is applied to the lever i i through a spring 12, one end of which is secured to the vertical guides 9 maintaining the brake block 10 in engagement with the wheel 8.

An inclined delivery or receiving table 13 operates within an integral portion of the frame I opposite the table 2, as illustrated in Figures 1 and 8, and is also adjustable with respect to its inclined plane and inversely to the adjustment of the feeding table 2, the latter being urged upwardly by the hand wheel 8 as the stock is fed into the machine while the delivery table 13 progresses downwardly at each operation of the hand wheel 8. This is accomplished through the reverse operation of the shaft 7, upon which the hand wheel 8 is mounted, with that of a shaft 14 beneath the delivery table 13. Pinions 15 are secured upon the shaft 14 which engage the teeth of rack bars 16 slidably operating within the frame I and secured to the table 13. The shaft 14 is rotated in an opposite direction to the shaft 7 through the medium of a sprocket chain 17 which is crossed between the sprockets 18 and 19 mounted upon the shafts 7 and 14 respectively, as illustrated in Figure 1.

Diagrammatical illustrations of the roller arrangements are shown in Figures 2 and 3 and will be presently described in detail. The ends of the shafts supporting these various rollers are journalled in bearings retained within adjustable bearing boxes 23 and 21 integral with the frame i on each side thereof between the feeding table 2 and the delivery table 13. It will be noted, by reference to Figure 1, that the bearings 22, 23, 24 and 25 are vertically adjustable within the bearing boxes 20 and 21, some of which bearings are adjustably fixed by set screws 2S while others are slidably arranged within the boxes 29 and 21 and are adapted to be operated by a cam and lever arrangement which will be hereinafter more fully described.

The roller assembly is driven through the medium of a motor 27 around whose pulley is arranged a belt 28 which surrounds another pulley 29 mounted on a transverse shaft 30 which is journalled at each end to the frame I. Still another pulley 3! is mounted upon the end of the shaft 39 which projects from one side of the frame I and around which is positioned a belt 32 for engaging a pulley 33 mounted upon the end of a shaft 34 arranged transversely through the assembly and rotatably supporting a . gear 35 which is meshed with other gears mounted on the various shafts of the roller assembly shown in Figures 2 and 3.

As previously stated, the primary object of the invention is that of providing a perforating medium for paper stock in connection with the printing thereof and to provide a means of ar ranging one or more series of perforations longitudinally of the stock, as the latter is passed through the machine, and transversely thereof at pre-determined intervals. It is, of course, desirable to provide means of adjustably spac- 5 ing the perforations to afford various sized detachable forms in the stock in a most economical manner. Provision is therefore made for such adjustments.

Having particular reference to Figure 2, the 10 feed rollers 3, opposingly rotated through the medium of gears 36 and 37, are driven by a gear 38 secured to a shaft 39. A gear 40 is mounted upon a shaft 41 and is meshed with the gear 38. The gear 40 is adapted to engage the teeth of 15 the gear .35 which meshes with the gear 42, whereas the latter engages the teeth of a gear 44 fixed to a shaft 45.

Perforations are impressed into the stock longitudinally of the latter with respect to its pas- ²θ sage through the machine or transversely of the arrangement of the various rollers and the shafts on which these members are mounted. Tire perforations are accomplished through the medium of toothed cylindrical members 46, 25 shown in detail in Figure 4, and which are adjustably mounted on a shaft 47, shown in Figures 2 and 3, to which is also secured a gear 48 for engaging the gear 40 secured to the shaft 41. The cylindrical member 46 primarily con- 30 sists of a disc having an annular flange 49 around which is arranged a series of orifices receiving a multiplicity of pointed pins 50 which extend radially from the outer periphery of the flange 49 of the member 46, in the manner il- 35 lustrated in Figure 4, and having heads 51 arranged around the inner periphery of the flange 49.

The pins 50 are retained in position by a disc 52, whose circumference is such as to be em- 40 braced by the flange 49, and is secured within the latter by screws 53. The members 46 are slidably arranged upon the shaft 47 and secured thereto through the medium of set screws 54. By reason of the slidable adjustment 45 upon the shaft 47, the members 46 may be set to provide a series of perforations desirably spaced.

In order that the pointed pins 50 may completely penetrate the stock, opposing rollers 55 50 are arranged therebelow having yieldable surfaces, such as rubber, leather, fiber, or other suitable material, into which the pins 50 may be depressed. The opposing rollers 55 may be of metal having a circumferential groove slightly 55 greater in width than the diameter of the pins 50 and sufficiently deep to receive the full extended portion of the latter, as shown in Figure 7.

As the stock is fed into the machine from the table 2, the feed rollers 3 engage the material 60 and urge the same beneath the toothed members 46 which bear against the stock feeding the same through the assembly and beneath mangle rollers 56 adjustably mounted upon the shaft 45. These members are also slidable on the shaft 45 65 in a manner similar to that of the members 46 and are adjusted immediately in line with these latter members to engage the stock along the series of perforations made by the pins 50 of the member 46. The rollers 56 bear opposingly 70 against a roller 57 which is preferably of metal. The function of the members 56 is that of smoothing out and pressing down any burs or projecting portions of the stock occasioned by the penetration of the pins 50. This is desirable 75

2,201,481 in order that the stock may lie perfectly flat and smooth and that such projecting portions may not present excessive bulk when the material is stacked and bound.

A transverse series of perforations in the stock is provided through the medium of an adjustable bar 58, illustrated in Figures 5 and 6, which is secured on each end to annular flanges 59 integral with discs 60 which are mounted on a shaft 61 10 and secured thereto through the medium of pins 62. The bar 58 is slidable circumferentially upon the flange 59 and is adjustably secured thereto by set screws or wing-nuts 63, as illustrated particularly in Figure 5.

A series of pins 64, similar to the pins 50 in the member 46, are arranged longitudinally of the bar 58 and adjustably fixed therein by retaining plates 65 which are secured to the bar 58 through the medium of screws 66. The bottom 20 of the plates 65 bear against the heads 67 of the pins 64, as illustrated in Figures 5 and 6, retaining the latter in position. The outer faces of the discs 60 may be graduated, or otherwise provided with a suitable scale, such as afforded 25 by the configurations 68 around the periphery of the discs 60, illustrated in Fig. 6, as an aid to the proper circumferential adjustment of the bar 58 upon the flange 59 of the members 60 to predetermine the contact of the pins 64 with the 30 stock and in proper synchronization with the operation of the members 46, it being sometimes desirable to perforate the stock transversely of the longitudinal perforations at a pre-determined point along the length of the longitudinal series 35 of perforations.

It is urged that the attachment of the transverse perforating assembly is optional and may be omitted if desired. The incorporation of this feature necessitates a minor modification in the 40 arrangement shown in Figures 1, 2 and 8. This charge is illustrated in Figure 3. An additional roller 69 having a yieldable surface similar to the rollers 55 is provided which the points of the pins 64 engage in perforating the stock.

The shaft 61 upon which the members 60 are mounted is rotated through the medium of a gear 70 meshed with a companion gear 71 mounted upon a shaft 72 carrying the roller 69, which is rotated by the gear 38 through the gear 40 50 and an idler pinion 73 on a shaft 74, the said pinion 73 meshing with the gear 71. A long mangle roller 56 is preferably substituted for the small rollers used with the assembly illustrated in Figure 2 in order to press out the trans55 verse perforations as well as the longitudinal perforations provided by the members 46.

As previously stated, the stock is first received by the feed rollers 3, the uppermost of which is vertically operated, as shown in dotted lines in 60 Figures 2 and 3, by rods 75 operatively attached, at their upper ends, to the shaft of the upper roller 3 through the medium of pivoted levers 75' attached to slidable bearings 22', within bearing boxes 20', illustrated in Figure 1. The lowermost 65 ends are pivotally attached to arms 76 rigidly fixed to an oscillating shaft 77, the latter being rocked or oscillated by a cam 78 attached to a shaft 79 extending transversely through the frame 1 through the medium of an arm 80 rig70 idly attached to the shaft 77 having a roller secured to its opposite end engaging the cam 78.

The shaft 47, bearing the toothed members 46 is also vertically movable by a cam 81 adjustably mounted upon the shaft 79 which actuates an arm 82 rigidly fixed, at its opposite end, to an other oscillating shaft 83. An arm 84 secured to the end of the shaft 83 is connected to rods 85 extending upwardly and connecting with the ends of the shaft 47 lifting the latter when the cam 82 is rotated. This is accomplished by reason 5 of the movement of the bearings 22 are vertically movable in the boxes 20.

The arrangement jUst described will permit the perforating members 46 to be disengaged from the paper stock at intervals determined by the 10 adjustment of the cam 81 which may be loosened upon the shaft 79 and freely rotated to properly synchronize the operation thereof with that of the rest of the assembly.

The cam shaft 79 is driven by a sprocket wheel 15 86 and a sprocket chain 87 which surrounds a sprocket (not shown) fixed to the shaft 43 as particularly indicated by dotted lines in Figure 8.

There is an obvious tendency of the stock to· adhere to the pins 50 of the members 46 as these 20 elements pierce the paper, and in order to detach the material from the pins 50, stripper members 89 comprising a flexible strip of metal adjustably arranged immediately in front of the members 46 and behind the feed rollers 3, as illustrated in 25 Figure 1. The strippers 89 are slidably arranged on a small rod 90 which extends transversely of the machine and parallel with the roller assembly. These members are adjustable with respect to the adjustment or position of the 30. perforating members 46 and are fixed in position upon the rod 90 by suitable set screws, or the like. The strippers 09 extend downwardly beneath the members 46 engaging the paper stock and, by reason of their tension, strip the mate- 35 rial from the pins 50 allowing the stock to continue through the machine.

In operation, therefore, the paper stock is placed upon the table 2 after the latter has been adjusted so that the topmost sheet is on a plane 40 with the apron 88 immediately in front of the feed rollers 3. The stock is fed between the feed rollers 3 which separate, by reason of the arrangement previously described, as illustrated in Figures 2 and 3, until the stock has been urged 45 therebetween against automatically operated guides (not shown) immediately in front of the members 46 which have been adjusted with respect to· each other upon the shaft 47.

In operation, the stock is received by the rollers 50 3 and perforated by the pins 50 of the discs 46. As the material passes through the machine the mangles 56 engage the stock and urge the same on to the delivery table 13 which is automatically adjusted in coordination with the feed table 2 55 through the medium of the hand wheel 8 which operates to move, in an opposite direction, the feed table 2 and the delivery: table 13. Thus, as the thickness of the stack of paper stock is decreased on the feeding table 2 and the same is 60 raised proportionately, the delivery table 13 is lowered in like proportion as the amount of the stock increases thereon.

When the transverse perforating assembly is used, the bar 58 is adjusted around the annular ⁶⁵flange 59 and fixed thereto at such a position as to cause the pins 64 to strike the paper at predetermined distances.

Manifestly, the structure shown and described ₇θ is capable of considerable changes and modifications by those skilled in the art and such changes and modifications which may be resorted to from time to time and which may be considered within the spirit and intent of : the in- ₇₅

4- 2,201,481 vention may also be considered as falling within the scope of the appended claims.