US2228372A

US2228372A - Paper perforator with automatic reinforcing device of the paper at the holes

Info

Publication number: US2228372A
Authority: US
Inventors: Skrebba Ida
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-09-12
Filing date: 1936-05-20
Publication date: 1941-01-14
Anticipated expiration: 1958-01-14

Description

J 14 1941 I. SKREBBA, GEB. STUHLINGER 2 22 372 PAPER PERFORATOR'WITH AUTOMATICREINFORCING DEVICE OF THE PAPER AT THE HOLES Filed May 20, 1936 2 SheetS -Sheet 1 n I v Q INVENTOR gzzu A Sham. BY (1. Nl uv ATTORNEY I. SKREBBA,- GEB. STQl- ILINGER 2 228,372

PAPER PERFORATOR WITH AUTOMATIC REINFORCING DEVICE OF THE PAPER AT THE'HOLES I Filed May 20, 1936 2 Sheets-Sheet 2 Jan. 14, 1941.

INVENTOR BY 3m ATTO NEY also supported by walls Patented Jan. 14', 1941 one srA'rss PAPER PERFORATOR WITH AUTOMATIC RE- INFORGING DEVICE OF THE PAPER AT THE HOLES Ida Skrebba, geb. Stiihlinger, Lahr in Baden, Germany I 1 Application May 20, 1936, Serial No. 80,842 In Germany September 12, 1935 12 Claims.

This invention relates to ofiice machines which serve to perforate sheets of paper, cards, copies and other paper documents to allow them to be threaded for instance, on the ispindles' of files, "and the invention relates more particularly to the type of machine which comprises an automatic feeding and sticking device for cutting reinforcing strips which are laid on the document, are stuck to it and which are perforated at the same time as the document to reinforce it at the place where the holes are made. I

One of the objects of the invention is to realize a machine of this type in which the feeding mechanism for the reinforcing strips may be locked at will, to effect perforations only when it is not desired to reinforce the documents. Another object is'to combine the mechanism and its actuating part in such a manner that when movement of the mechanism has started, no other movement of the mechanism canbe started or eflected before the completion of the started movement. v

Other important objects and advantages of the invention will appear in the course of the following description of the appended drawings, in which a Fig. l is' a front view of the machine,

Fig. 2 is a top view,

Fig. 3 is an end view, I

Fig; 4 is a section along line IV-IV of Fig. 2.

Fig. 5 shows details of the feed-drums for the reinforcing strip,

Fig. 6 shows details of a knife.

The machine comprises a rigid underpart or support I for example vided with vertical edges 2 which serve to support the various elements mentioned hereafter. Those two vertical edges or walls extend along about the half of the length of the support I, the other part of said support being covered by a table 4 for reception of the documents to be perforated. At its side adjacent to walls 2, the table 4 is provided with stops such as 5 against which the documents. abut and the table 4 is formed to provide holes 6 in which the perforating punches 'I' will enter during perforating operations.

These punches arecarried by a perforating top 8 extending transversally to the table 4 and fixed to the top end of a lever 9 pivoting around shaft it supported by the walls 2. A spring ll tends-to push lever 9 away from table 4. Around shaft l2, 2, ispivotably carried a lever i3 provided with a handle I4; This lever l3 embraces the top of lever 9 and, when pushed down, it is applied on to a. rotatable roller l5 I6, passesthrough a made of sheet-iron, pro- I carried by top 8. When top 8 is pushed down, the punches 1 are actuated to perforate the documents not by a direct action on lever 9, butover. lever l3 and roller l5. On account of the proximity of pivot 52 and top 8, this arrangement 5 considerably lowers the effort necessary to perforate a certain number of documents at the same time. As shown by the drawings, when the perforating punches penetrate in the documents, the direction of the effort on roller I5 is exactly par- 10 allel to the downward movement ofthose punches. This permits all of the force to be applied to the perforating action and makes the device operate with a minimum of effort.

Each vertical wall 2 supports on the outside a 15 drum or bobbin l6 carrying a reinforcing strip of paper l'l. This paper strip unrolled from bobbin feeding device which will be described hereafter and is then lead by the downward movement of lever 9 above the-docu- 2o ments supported by table 4 exactly over the holes 6. Each of the punches I carries an elastic pressure pad l8 which when perforation is effected, presses strongly on strip I! brought above the document to maintain said strip over the 25 holes 6 during perfor ion and cutting operation and to stick it on the document.

Progress of strips IT is realized between two drums 'or bobbins l9 and 20, for each strip; the two bobbins is are locked on the same shaft 2| carried by walls 2 and which carries a metallic "disc 22, provided with teeth 23 protruding from the plane of the disc. Preferably, those teeth are obtained by cutting out the edges of the disc and by bending down the'cut-out parts at right angles 35 to the plane of the disc. Lever 9 carries the pivot -of a small lever or pawl 25 which is thus suspended under lever 5 and is resiliently applied against the end of an arm 21, by mean'sof spring 26, said arm being pivoted at 28 and protruding 0 outside of top-part 8, to be actuated. The end of said arm is obtuseangled (see Fig. 2). Whe n the arm is in an extreme position and presents to lever 25- the small side of its terminal edge, said lever 25 is pushed back towards the pivot of lever 5 9, compressing spring 26, whilst in the other extremeposition, the spring 26 acts and pushes lever 25 away from the'pivot of lever 9.

In this last named position, when lever 9 is lowered, to realize a perforation, pawl 25 engages 5o disc 22 by one ofits teeth and provokes rotation thereof according to a determined angle, so that drums l9 are rotated sufficiently to advance the ends of the reinforcing strips l1 over the holes .8.

' Thus, in this position, the machine perforates and 5s provides the document with reinforcing strip. In the other position of arm 21, pawl 25 does not contact with disc 22 and the machine only perforates.

5 Because of this actuating device of bobbins l9,

it will be understood that if, for any reason whatsoever, arm 9 has not been fully lowered and has risen disc 22 will be kept in the position which pawl 25 has conferred to it, through incomplete lowering of lever 9, any later movement to lower said lever will only determine movement of disc 22 from the moment when pawl 25 will engage said disc. That is to say in this later movement disc 22 will only rotate sufficiently to conclude its 15 normal complete movement. The quantity of paper I! which has advanced and has been fed during incompletemovement will thus not be lost and will be exactly 'comple-ted during the following movement of lever 9.

To ensure proper and sure progress of reinforcing strips I1 and to ensure that they possess enough rigidity to enable proper cutting operation of said strips by means of head 8, the feeding drums or bobbins I920 are of special form to confer to the strips which comes out of between them, a transversally non-plane form, for instance arched. To that end the two lower bobbins 20 have their axis 29 carried bythe end of a spring blade 30 combined with another lower blade 3|. Blade 30 carries on its upper face a forked blade 32 passing over axis 29, said forked blade passing over axis 29 and its arms extending substantially to the neighborhood of the extreme edge of table 4.

In one position, a rotating arm 33 playing the part of a cam, pushes back upwards, the assembly of springs 303|, to resiliently apply the drum or roller 20 against the upper drum or bobbin [9.

Rollers 2|) have their round surfaceprovided with teeth or ribs and in cross section said ribbed 40 edge is arched correspondingly to the form to be conferred to strip IT. The drums l9 comprise in their cylindrical surface a medium off-set part 36 (hollow), the edges of which are transversally ribbed as shown at 34, the smooth parts of said 45 cylindrical surface being lined by an edge such as 35 which guides strip 11. Roller 20 engages itself in the hollow part 36, so that strip l1 which passes through, between drums l9 and 20 is transversally. arched, feeding being realized thanks to 50 the ribs 34 and to the teeth of roller 20.

' To lighten the construction, drums l9 may comprise three parts: a full or solid central part 36 to which are connected (by welding, etc.) the two hollow side parts. Solid part 36 can also be in form of a cylinder or ring with ribbed or grooved cylindrical surface lodged between two smooth cylindrical parts (see left of Fig. 3). In that case, roller 20 possesses a cylindrical surface the cross section of which is. of frusto-conical form and which is ribbed on its small base.

The protruding arms of fork 32 serve to guide and support the edges of strip 11, between drum l9 and perforating table 4.

This guiding, in the direction exactly perpendicular to that of table 4 can however only be realized by said fork to a-certain extent because the arms of said fork cannot extend up to the table. To ensure this guiding until cutting operation by head 8 takes place, two protruding arms 39 for each knife 38 are provided, said arms extending longitudinally on each side of a knife. As soon as head 8 gets nearer to table 4, said two arms thus embrace the two sides of strip H which is well maintained against any transversal displacement 75 during later lowering of knife 38. Moreover those guiding arms could be provided at the edge of the table itself.

To render the cutting operation more easy the 'cutting edge of the moving knife is inclined in .same time a reinforcing strip provided with gum,

consists in that the small discs cut out by the punches fall on the ground or on the support and soil other objects to which they could stick. To avoid this disadvantage, there is provided under that part of table 4 which juts out on each side of the support I, a small receptacle such as 40, pivoted at 4| and which is normally under a hole 6 of plate 4. The small discs removed by the punches are received. in said receptacles which may be emptied from time to time by pivoting them away from the table as shown .by the dotted lines in Fig. 2.

Thedescribed machine is provided to work with strips I! one side of which is coated with a dry paste or glue for use without heating. The machine can however be foreseen for use with strips coated with a sticking paste containing rubber and which necessitates a certain amount of heating. To that end, table 4 is provided with an isolated plate 42 to which a heating current is lead by means of wires 43 and terminals 44.

Plate 42 is lodged in or under table 4 in the neighborhood of perforation holes 5 and it heats up table 4 suificiently to ensure that the coating mass of strips II becomes plastic and sticky.

Having now fully described my said invention, what I claim and desire to secure by Letters Patent is:

1. In a paper perforating device in combination, a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches, an operating lever for actuating said punches, two reels of adhesive strip 'rotatably mounted on said base, means actuated by the operating lever for feeding said strips between said punches and dies, said means comprising an arm pivotally connected with said operating lever, and means for restoring said operating lever and said pivotal arm into their original positions if said operating lever is released after precedingly being actuated, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged and rotated by said arm if said operating lever is actuated, one drum at each end of said shaft,.on e roller adjacent to each drum, resiliently mounted on said base, between which rollersand drums said adhesive strips are drawn each time the operating lever is actuated, means for disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punches for simultaneously pressing said strips into contact with the paper and severing predetermined lengths from said strips.

2. In a paper perforating device in combination, a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches, an operating lever adapted to be depressed for actuating said punches, two reels of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strips between the punches and dies, said means comprising'a shaft mounted on said base, a ratchet wheel mounted on said shaft, an arm' pivotally connected with said operating lever and adapted to engage a tooth of said ratchet wheel while said operating lever is depressed and to rotate said ratchet wheel at about an angle corresponding to the distance said operating leveris depressed, one drum at each end of said shaft, and one roller adjacent to each drum, resiliently mounted on said base, between which rollers and drums the adhesive strips are drawn each time said operating lever is depressed and means for restoring said operating lever and said pivotal arm into their original positions if said operating lever is released after precedingly being depressed, means for disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punches for simultaneously press= ing strips into contact with the paper and severing predetermined lengths from said strips.

3. In a paper perforating device in combination,

a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches, an operating lever adapted to be depressed for actuating said punches, two reels of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strips between the. punches and dies, said means comprising a shaft I mounted on said base, a ratchet wheel mounted resiliently mounted on said base, between which rollers and drums said adhesive strips are drawn each time said operating lever is depressed, means for restoring said operating lever and said pivotal a'rm' into their original positions if said operating I 'lever is released after precedingly being depressed whereby'the operating arm reengages the'same tooth of the ratchet wheel and finishes the rotation if released before finishing the rotation of the ratchet wheel corresponding to one tooth and activated again, means for disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punches for simultaneously pressing strips into contact with the paper and 'severing predetermined lengths from said strips.

. 4. In a paper perforating device in combination, a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches; an operating lever actuating said punches, two reels of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strips between said punches and dies, said means comprising an arm pivotally connected with said operating lever, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged and rotated by said arm if said operating lever is actuated, one drum at each end of said shaft, one roller adjacent to each drum.

resiliently mounted on said base, between which rollers and drums said adhesive strips are drawn each time the operating lever is actuated, springs adapted to press said rollers against said adhesive strips, and means for removing said rollers from contact with'said adhesive strips, means for disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punches for simultaneously pressing said strips into contact 5. In a paper perforating device in combination, a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches, an operat inglever actuating said punches, two reels of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strips between said punches and dies, said means comprising an arm pivotally connected with said operating lever, a shaft mounted on said base, a

ratchet wheel mounted on said shaft adapted to be engaged and rotated by said arm if said operating lever is actuated, one drum at each end of said a shaft, one roller adjacent to each drum, between which rollers and drums said adhesive strips are drawn each time said operating lever is actuated, springs mounted on said base for supporting said rollers and means for bringing said rollers supported by said springs in or out of contact with said adhesive strips, means for disengaging said pivotal ,arm from said ratchet wlfeel at will and means mounted on said punches for simultaneously pressing said strips'into contact with the paper and severing predetermined lengths from said strips; 4

6. In a paper perforating device in combination,

abase, at least one punch mounted thereon, at

least one die cooperating with said punch, an operating lever for actuating said punch, at least one reel of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strip between said punch and said die, said means comprising an arm pivotally connected with said operating lever, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged by said arm, a drum at at least one end of said shaft and a roller resiliently mounted on said base, between which roller and drum said adhesive strip is drawn each time the operating lever is actuated, said drum having a peripheral surface with a centrally disposed angu- .lar channel and said roller having a peripheral surface substantially complementary to the peripheral surface of said drum and adapted toengage with said angular, channel, means for disengaging said pivotal arm'from said ratchet wheel at willand means mounted on said punch for simultaneously pressing said strip into contact with the paper and severing a predetermined length from said strip. 1

'7. In a paper perforating device in combination, abase, at least one punch mounted thereon, at least one die cooperating with said punch, an operating lever for actuating said punch, at least one reel of adhesive strip rotatably mounted on said base. means actuated by said operating lever for feeding said strip between said punch and said die, said means comprising an arm pivotally connected with said operating lever, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged by said arm, a drum at at least one end of said shaft and a roller resiliently mounted on said base, between which roller and drum said adhesive strip is drawn each time the operating lever is actuated, said drum having a peripheral surface with a centrally disposed angular channel. said roller having a peripheral sur with the paper and severing a predetermined length from said strip.

8. In a paper perforating device in combination, a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches, an operating lever for actuating said punches, two reels of adhesive strip rotatably mounted on said base, means actuated by the operating lever for feeding said strips between said punches and dies, said means comprising an arm pivotally connected with said operating lever, a shaft mounted on said base, a ratchet wheel mounted on saidshaft and adapted to be engaged and rotated by said arm if said operating lever is actuated, one drum at each end of said shaft, one roller adjacent to each drum resiliently mounted on said base, between which rollers and drums said adhesive strips are drawn each time the operating lever is actuated, said drums having a substantially' concave peripheral surface and said rollers having a substantially convex peripheral surface forming substantially complementary surfaces to the peripheral surfaces of said drums and means for restoring said operating lever and said pivotal arm into their original positions if said operating lever is released after precedingly being actuated, means for disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punches for simultaneously pressing said strips into contact with the paper and severing predetermined lengths from said strips.

9. In a paper perforating device in combination, a base, a pair of punches mounted thereon, a pair of dies cooperating with said punches, an operating lever for actuating said punches, two reels of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strips between said punches and dies, said means comprising an arm pivotally connected with operating lever, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged and rotated by said arm if said operating lever is actuated, one drum at each end of said shaft, one roller adjacent to each drum, resiliently mounted on said base, between which rollers and drums said adhesive strips are drawn each time the operating lever is actuated, said drums having peripheral surfaces with a centrally disposed angular channel, said rollers having peripheral surfaces substantially complementary to the peripheral surfaces of said drum and adapted to engage with said angular channels and means for restoring said operating lever and said pivotal am into their original positions if said operating lever is released after precedingly being actuated, means for'disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punches for simultaneon said base, a ratchet wheel mounted on said shaft and adapted to be engaged by said arm, a drum at at least one end of said shaft, a roller resiliently mounted on said base, between which roller and 'drum the adhesive strip is drawn each time the operating lever is actuated, said drum having a peripheral surface with a centrally disposed angular channel, said roller having a peripheral surface substantially complementary to the peripheral surface of said drum and adapted to engage with said angular channel and means for removing said resiliently mounted roller from contact with said adhesive strip, means for disengaging said pivotal arm from said ratchet wheel at will and means mounted on said punch for simultaneously pressing said strip into contact with the paper and severing a predetermined length from said strip.

11. In a paper perforating device in combination, a base, at least one punch mounted thereon, at least one die cooperating with said punch, an

, operating lever for actuating said punch, at least one reel of adhesive strip rotatably mounted on said base, means actuated by said operating lever for feeding said strip between said punch and said die, said means comprising an arm pivotally connected with said operating lever, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged by said arm, a drum at at least one end of said shaft, a roller resiliently mounted on said base, between which roller and drum said adhesive strip is drawn each time the operating lever is actuated, said drum having a peripheral surfacewith a centrally disposed angular channel, said-roller having a peripheral surface substantially complementary to the peripheral surface of said drum and adapted to engage with said angular channel, serrations on the edges of said channel and serrations on the peripheral surface of said roller adapted to coact with said serrations on said edges and means for removing said resiliently mounted roller out of contact with the adhesive strip, means for disengaging said pivotal arm from said ratchet Wheel at will and means mounted on said punch for simultaneously pressing said strip into contact with the paper and severing a predetermined length from said strip.

12. In a paper perforating device in combination a base, at least one punch mounted thereon,

at least one die cooperating with said punch, an operating lever actuating said punch, at least one reel of adhesive strip rotatablymounted on said base, means actuated by said operating lever for feeding said strip between said punch and said die, said means comprising .an arm pivotal on and.

passing through a slot in said operating lever, a shaft mounted on said base, a ratchet wheel mounted on said shaft and adapted to be engaged and rotatedv by said arm if said operating lever is actuated, a drum at at least one end of said shaft and one roller adjacent to said drum resiliently mounted on said base between which roller and which drum said adhesive strip is drawn each time said operating lever is actuated. means for disengaging said pivotal arm from said ratchet Wheel at will and means mounted on said punch for simultaneously pressing said strip into contact with the paper and severing a predetermined length from said strip.

IDA SKREBBA' c 8. STUHLINGER.

ill