US2343203A - Stapling machine - Google Patents

Description

Feb. 29,'1944. w. a PANKONIN STAPLING MACHINE Original Filed July l, 1940 5 Sheets-Sheet l INVENT OR. WILL/Am G. FHM/0MM a z A TT o R NEY.

Feb. 29, 1944. W, G, PANKQN|N 2,343,203

STAPLING MACHINE Original Filed July l, 1940 3 Sheets-Sheet 2 ATTORNEY.

l aff/@AJ` Feb. 29, 1944. w. G, PANKONIN STAPLING MACHINE Original Filed July l, 1940 3 Sheets-Sheet 5 a fL/M/ ATTORNEY Patented Feb. 29, 1944 i sTAPLmG MACHINE William G. Pankonin, Chicago, Ill. Original application `uly 1, 1940, Serial No.

343,380. Divided and Serial No. 387,006

8 Claims.

This invention relates generally to improvements in stapling machines.

This application is a division of the copending application of William G. Pankonin, applicant herein, Serial No. 343,380, led July l, 1940, for Stapling machines."

One of the objects of the invention is to provide a stapling machine of neat and simple appearance, adaptable for use as a desk type stapler, as a hand-held plier-type stapler, and as a tacker device.

The foregoing object is accomplished by constructing the stapling machine of elongated arms pivoted at one end of each by a single pintle. One arm forms a base for the support of the other arms and also carries a staple clinching anvil. Two other arms, an operating arm and a magazine arm, are interrelated to form a staple storing and driving mechanism. This driving mechanism is operable by moving the operating arm relatively toward the magazine arm. This occurs whenever the motion of the magazine arm is arrested by the base arm or material being stapled. The base arm and operating arm are designedand dimensioned so that the operator can grasp them between the palm and lingers of one hand and operate them by squeezing the hand. The base arm is also adapted to be positioned on a supporting surface so that the operator may operate the operating arm by merely applying downward pressure. To use the machine as a tacker, the base arm is provided with brackets so that it can be swung away and out from under the magazine arm. The magazine arm may then be placed directly on the material and the staple driven therein vwithout clinching by merelypressing downwardly on the operator arm.

The novel features, which are considered characteristic of the invention, are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of a specic embodiment when read in connection with the accompanying drawings, in which:

Figure 1 is a View in side elevation showing a stapling machine embodying the present invention;

Figure 2 is a sectional view in side elevation showing a stapling machine embodying the present invention, the section line meandering from the center plane to a plane just inside the Side 55 I this application April 5,

wall of the magazine arm and back to the center plane again for sake of clarity;

Figure 3 is an exploded view in perspective showing the various parts comprising a stapling machine embodying the present invention;

Figure 4 is a sectional view in side elevation showing the stapling machine embodying the invention with the staple follower unit in retracted position;

Figure 5 is a fragmentary view in side elevation showing the stapling machine embodying the invention with the operating arm swung upwardly from the magazine arm;

Figure 6 is a sectional view taken on the line 6--6 of Figure 4.

Referring now to the drawings, the stapling machine generally comprises an operating or presser arm I overlying and interrelated with a magazine arm 2 and a base arm 3, which latter is adapted to support the stapling machine. 'Ihese arms are all pivoted about the same axis.

The base arm 3 comprises an elongated, inverted, channel-like member which carries at its forward end a staple-clinching anvil 5. The anvil 5 has' two differently acting chnching cavities, and is shiftable forwardly and rearwardly of the arm 3 to aline a selected one of the clinching cavities with the ejection chute. A spring 6, extending between the downwardly extending ends of the anvil 5, has an upwardly bowed portion which bears against either side of a downwardly projecting ridge I to urge and maintain the anvil 5 to and in one of its selected positions. At its front and rear ends the base arm 3 is provided with rubber foot pads 8 and 9. Intermediate its ends the base arm 3 is narrowed, as is evident from Figure 3, to permit it to be readily grasped in the fingers of the operators hand when the stapling device is used as a plier-type stapler. At the rearward end of the base member 3 there are provided two parallel spaced slots I0 and II piercing the upper surface thereof. A supporting bracket I2 has a web portion I3 positioned below the surface of the base arm 3 and two upwardly extending flanges I4 and I5 extending through the slots I0 and II, respectively. The web portion is spot-welded or otherwise fastened to the base arm 3 to secure the bracket I2 in position. At the upper ends of the iianges I4 and I5 there are alined apertures which receive the nutted pintles 4a and lib.4

The bottom of the base arm 3 vhas a cover plate 22,'held by a tight frictional grip to the inner surfaces of the edges of the base arm 3. The cover plate 22 is co-extensive with the narrow portion of the base arm 3 and furnishes a smooth portion which is easily grasped in the hands of the operator when the device is used as a plier-type of stapler.

The magazine arm 2 has a laminated core 23 upon which the staples S ride in straddle fashion, as is indicated in Figures 2 and 3. Folded longitudinally about the forward end thereof is a hou-sing member having a front wall 24 and side Walls 25 and 25. Each of the side walls has a bottom portion bent underneath and secured to the bottom of the laminated core 23. The side wallsy are spaced from the sides of the core 23 to form a guide for staples on the core 23. The front wall is spaced from the front end of the core 23l to form an ejection chute through which staples are driven. The top edges of the side walls 25 and 25 are providedv at their forward edges with upward projections 21 and 28 which are adapted to limit the relative rriovement` between the operating or presser arm I and the magazine arm 2. At the rearward edge of these projections there are rearwardly projectingteeth 2.9 and. 3! offset outwardly from the side of the respective walls and adapted to interlock withv spring-biased clips to prevent the operating arm I; from separating fromk the magazine arm` except at the will ot the operator. At the rearward end of thel sijdes 25 there are pintle brackets 3l and 32 havingy apertures in their upper ends adapted to receive the nutted pintles 4a and 4b. Staple guides 35iy and 34 are inserted within the confines of the walls 25 and 2G, and are secured thereto by small flush rivets or other suitable means. The guides 33 and 34 have lower inwardly projecting flanges 35` and 35, which are spaced from the top of the staples riding onA the core 23.. At their forward ends guides 33 and 34 are of greater height, and their corners are: beveled at 31. and. 3,8 to provide any easy entrance for the staple-driying` tool carried by the operating arm I.

On the upper edges of the. guides. 3.3- and 34, intermediate the ends thereof, are locks 39A and 40 to detachably hold the retaining bracket M, which in turnV loosely slidably holds the. follower rod. Adjacent they locks 39,. and 49 are pedestalsv ii and 42 providing a bearing for compression springs urging the operating arm I away from the magazine arm 2.

The staple follower mechanism. is more completely described and claimed in the aforemen-V tioned application of. William G. Pankonin and forms no part of` thepresent invention.

The operating.k arm I is formed of a single piece of sheet metal folded about the forward wall 53. The side walls extend rearwardly from the forward wall 53 and have their upper edges inturned and joined by tongue and groove means, indicated at 54. At the rear of the arm I` the sides are pierced to receivethe nutted pintlesA 4a and 4b. The arm Iv slidably` fits over the magazine arm 2 and b oth are pivoted' to the flanges MI` and I by the pint-les 4d and 4b. The rear portions of the sides of arm I are offset inwardly at the` rear and'slide against theV inner surfaces of' the flanges Id and I5. There is sufficient clearance between the walls and 26 and thewalls of arm I to. accommodate-the shanks of the clips 65 and t6 therebetween. Thebottom edgesof theA frontl and. sidewalls of the arm II are peenedL inwardly, as indicated in Figure 2; A pair ofv springs 5 5 and 55 are, positioned within the connes 'of the arm i and are frictionally. held on guides secured to the under surface; of ther a-Irn. They rest,-

75;, base. arm. 31 resting dat thereon, to; drive; and

against the upper surfaces of the pedestals 4I and 42, respectively, when the operating arm I is in operative position. These springs resiliently urge the operating arm I away from the magazine arm 2. A spring clip 51, adapted to detachably grasp and hold the sleeve 41, is soldered or otherwise secured to the top inner side of the operating arm I adjacent its rear end. At its top forward end the operating arm l is provided with a slot 58 adapted to receive a projection on the driving blade 59. A latch arm S0 is provided with'a forward extension 60a adapted to pass through a crescent-shaped slot in the top of the blade 59 and enter into a similarly shaped slot 6i in the wall 53 to hold the driving blade 59 in the slot 58l and in abutment against the inner surface of the top: of the operating arm I. A small compression spring 62 is positioned between the inner surface of the forward wall 53 and the driving blade 59. The spring 62 urges the blade 59 against the shoulders formed at the base of the extension 59a and thereby flexibly maintains the blade in alinement with the ejection chutedened by the wall 211, the forward edges of the staple guides 33 and 34 andthe beveled corners 31' and 38. The latch arm 69 is retained in position by a pin 63 havingr thereon a compression spring 6d fitting within a semi-circular hump in the latch 60. The pin 93 is in turn retained in position by the action of two clips 65 and 6G of identical construction except that one is right hand and the other is left hand. The clips 65` and 65 are positioned within the armA I and have at their upper endsv small anges ttable within slots 61.-58, (-61v not shown) cut in opposite sides of the operating arm I. near the front thereof. The spring 6 4 resiliently maintains the small flanges on the clips 65-66 in position. within the slots B8, thereby locating the pinand clips with respect to the operating arm I.. The clips B5. and 545 are provided with teeth Sil-19, which normally engage with the offset teeth 29 and 39 on the magazine arm 2 to limit the movement of the operating arm I away from the magazine arm 2'. By pressing inwardly on outwardly extending tabs T at the bottom ofcl'ipsv 55j andt, the teeth 69 and 10 will be moved out of alinement with the teeth 29y and 3E), respectively, and the operating arm I may be moved about the pintles lia. and 4b away from the magazine arm 2. The sloping edges of the teeth 29, 3, 69, and' 10 are bcveled so that they will knife by each other when the a-rm I` is swung into operating position.

Notches m and m in guides 33 and1 36'., notches.

n3 (not shown) and m in walls 2,5 and 2.5, provide clearance space permitting the tabs T to be moved inwardly. Notches nt (not shown) and'ns in the walls of arm I accommodate the tabs T of the clips 65 and 66.

YA. handle 1I, shaped and recessed as shown in Figures 1 and 2, fits over the top of the operating; arm I and isseciuedthereto` by counter-sunk screws or other suitable fastening means. The handle 1-I is preferably formed of transparent material. A card 12 bearing indicia is inserted between, the top of thevarm Ir` and the handle 1I. This card is of course` interchangeable,l and a card with appropriate insignia.v and indicia maybe used; as desired. ThecardI is viewed through the handle which protectsv it from deterioration. The handle 1I, however, may be made of other materials.. which produce a smooth surface and attractive appearance.

Withv the device positiorieciA on, a desk',A and the,

clinch staples, it is only necessary to apply force to the top of the operating or presser arm I or handle ll. The first action merely compresses both the operating arm I and the magazine arm 2 against the top of material inserted between the ,r

magazine arm and the anvil 5. Further compression causes the operating arm I to move donwardly relative to the magazine 2, thus forcing the staple driving blade 59 against the bridge of a staple, ejecting it downwardly between the wall 24 and the forward end of the core 23, whereby its legs are caused to pierce the material and be bent over in the clinching cavities formed in the top of the anvil 5. To assure this action the spring 29 has less eiiective compressive force than the two springs 55 and 56. When pressure is released the operating arm I is moved relatively away from the operating arm 2, and both of these arms are moved upwardly from the base arm 3 to assume the position shown in Figures 1 and 2. The relative movement between the arms I and 2 is limited by the engagement between the upper edges of the projections 2l and 28 and the top of the arm I in the down direction, and the engagement between the offset teeth 29 and 30 and the teeth 69 and I0 in the up direction. The total relative movement is suiiicient to permit the edge of the driving blade to move a distance sufficiently in excess of the over-all length of the legs of the staples adapted for use in the machine to completely drive the same one by one from the magazine.

In the event that a staple is jammed, and it is necessary to obtain access to the interior of the magazine arm 2, it is only necessary to compress the tabs T, thereby disengaging the teeth 69 and l from the teeth 29 and 30, whereupon the op.- erating arm may be moved about the pintles 4a and db upwardly and away from the magazine arm 2. Upon moving the operating arm I into operative relation with the magazine arm 2, the driver blade 59 is guided by the beveled portions 31 and 38 on the guides 33 and 34 and the beveled portion B on the edge of the forward wall 24. The beveled sloping portions on the teeth 29, 39, 69 and 'I9 guide those teeth laterally past each other until snapped into alinement by the action of the spring 64.

The flanges I4 and I5 on the supporting bracket I2 are of sufficient height so that the ends of the operating arm I and magazine arm 2, and the handle (when the follower rod is fully inserted), may readily clear the base arm 2 as the arms I and 2 are swung away from the base arm 3 about the pintles 4a and 4b. With the base arm 3 swung 180 degrees away from the arms I and 2, these arms may be used as a unit, and the device operated as a tacker device. That is, the staples are driven into material without clinching the legs, the action of the anvil being eliminated. In other respects the device acts in identically the same manner as when the staples are being clinched as heretofore described.

If it is desired to operate the device as a pliertype stapler, the device may be grasped in the hand of the operator, the fingers encircling the narrow portion of the base arm 3 and the handle II resting in the palm of the hand between the ngers and the thumb. Merely squeezing the hand causes the material to be clamped between the arm 2 and the anvil 5. Further squeezing causes the arm I to drive the staple through the material and clinch the legs thereof against the anvil.

Because of the height of the supporting bracket I2 it is preferable to provide the magazine arm 2 with pressed-out portions 'I3 at the lower rear of the sides 25 and 2B, respectively. These pressed-out portions have a sliding fit with the lower inner sides of the flanges I4 and I5 of the supporting bracket I2, thereby providing a guide to assure the proper alinement between the ejection chute and the cavities in the anvil 5.

Although there are shown and described certain specic embodiments of the invention, many modifications thereof are possible. The invention is not to be restricted except in so far as is necessitated by the prior art and by the spirit of the appended claims.

I claim: v

1. A stapling machine comprising a magazine varm having an ejection chute at one end and a loading opening at the other end, said magazine arm at its loading end being provided with upwardly extending pivot holding portions, an operating arm overlying said magazine arm and having at one end a driving blade reciprocal in said ejection chute and at its other end pivot holes, a base arm underlying said magazine arm and having at one end a clinching anvil in alinement with said ejection chute and at the other end upwardly extending brackets adapted to straddle said magazine arm and operating arm, and means pivotally interconnecting all of said arms at a common axis.

2. A stapling machine comprising, a magazine arm, an operating arm and a base arm having a common pivotal connection at one end of each, a compression spring operable between said magazine arm and said operating arm, spring means for urging said magazine arm away from said base arm, a spring-biased clip on said operating arm, an offset tooth on said magazine arm engageable with said clip to limit the extent of the operation of said compression spring in forcing said operating arm and said magazine arm apart.

3. A stapling machine comprising, a magazine arm, an operating arm and a base arm pivoted at one end of each, said magazine arm comprising an elongated core forming a staple track, a member folded about said core from the forward end thereof and providing forward and side walls, the top edge of said forward wall being curved outwardly, guide members secured to said side walls and spaced from said core, the forward edges of said guide members being spaced from said forward wall and having their top corners beveled, said operating arm having a driving blade operable between said forward wall and said forward edges.

4. A stapling machine comprising, a magazine arm, an operating arm and a base arm pivoted at one end of each, said magazine arm comprising an elongated core forming a staple track, a member folded about said core from the forward end thereof and providing forward and side Walls, the top edge of said forward wall being curved outwardly, guide members secured to said side walls and spaced from said core, the forward edges of said guide members being spaced from said forward wall and having their top corners beveled, said operating arm having a driving blade operable between said forward wall and said forward edges, said guide member having pedestals adjacent their rear ends, and springs acting between pedestals and said operating arm.

5. A stapling machine comprising, a magazine arm, an operating arm and a. haseA arm pivoted at one end of each, said operating arm comprising an elongated piece of metal folded about a forward wall to provide sidewalls, the top vportions of said side wallsvbeing folded inwardly and. interlooked by key and notch means formed integrally thereon.

6. A stapling machine comprising, a magazine arm, an operating arm and a base arm pivoted at one end of each, an operating'handl'e positioned on said operating arm and substantially co-extensive therewith, said handle being of non-metallic transparent material, and an identification marking card positioned between said handle and said operating arm.

'7. A stapling machine comprising, a magazine arm, an operating arm and a base arm pivoted at one end of each, means releasably holding said operating arm in relation to said magazine arm, a. staple driver blade positioned in said operating arm and cooperable with said magazine arm to drive staples therefrom, and means cooperably. interengaged with said rst mentioned means for holding said blade in operative position Within said operating arm.

8. A stapling machine comprising a magazine armr having an ejection chute at one end and a loading opening at the other, an operating arm overlying said magazine arm, a staple driving blade carried by said operati-ng arm and operable in said ejection chute, a base arm underlying said magazine arm, a clinching anvil on said base arm in alinement with said ejection chute, means pivotally inter-connecting all of said arms at a common axis disposed adjacent said loading opening, and a feeder mechanism havingA a loose siding connection with said magazine arm and operable Within said loading opening to permit loading of the magazine without disconnection between the stapling machine and said feeder mechanism.

WILLIAM G. PANKONIN.

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