US2619637A

US2619637A - Plier type stapler

Info

Publication number: US2619637A
Application number: US111412A
Authority: US
Inventors: Frank S Boroughs
Original assignee: Arrow Fastener Co LLC
Current assignee: Arrow Fastener Co LLC
Priority date: 1949-08-20
Filing date: 1949-08-20
Publication date: 1952-12-02
Anticipated expiration: 1969-12-02

Description

1952 F. s. BOROUGHS PLIER TYPE STAPLER Filed Aug. 20, 1949 3 Sheets-Sheet 1 S. U m0 mm V B S K N A R F ATTORNEY 1952 F. s. BoRoue-Hs ,6 ,637

PLIER TYPE STAPLER Filed Aug. 20, 1949 SSheets-Sheet 2 INIIIIIF' \y/my//// HS Z3 V FRANK S. BQROUG ATTORNEY 2, 1952 F. s. BOROUGHS PLIER TYPE STAPLER 3 Sheets-Sheet 3 Filed Aug. 20, 1949 FRANK S. BOROUGHS Ob \mb v ATTORNEY ing s top wall formed with a slot and a split Patented Dec. 2, 1952 UNITED STATES 2,619,637 'PLIER TYPE stems Frank S. Boroughs, New York, assignor to Arrow Fastener 00., Inc, Brooklyn, N. Y, a

corporation of New York Appl'i-estion iugust 20, 194E saris-1' Nail-1 112- 6 Claims.

This nvention rel shes to 51'1 e r type staplers;

object'oi thisinvention is to provide a stapler or the harabti dscrihed comprising a frame provided with anvil, a staple magazine; a handle ivoted to the Staple magazine and. Said name being: formed with hook Shaped grooves, and the pivotal connection between the handle and the magazine inducing a pivot pin having outward extensions engaging in said groove" 1'01" pivoting the Magazine and the han-' dle relative to the frame, and spring means temg' prdvided to retain the outer ends er the pivep pin within half bearihgs at the inner ends of the grooves, for retaining the handle; frame and magazine is assembled interpivoted relation.

Another object of this invention is' to provide a staple magazine of the character described in which the pivot pin serves th 1601! tli- Spring- 110 th -magazine.

Yet; another object of "his invention is to provide ih a stapler of the racter described, a staple magazine having side walls which are notched and a frontjcover for the magazine haw ing lugs received in the notches to accurately d' termine the size opening in! the" staple which is driven from the magazine: n I

Xet anothi" object of this invention is to isvide in as'tapler of the char dfrihd, a stapiemag azme comprising fiiagazihe'hbdy new m qq j v W an rw n'yi x ndin gfiefiand side walls and a channel shaped staple ple" magazine incliiding pusher rod and a latch attached to the rear of the pusher and releasably engageahle with the top w 'llf of the staple gnid in a novel marnier to permit withidrawal of the pusher rod at will, and to; retain the pusher rod inplace pn-s'aid guide when the pusher is assemble with the enter", r

Y'etari object tr ms inventionis to provided. staple magazine fora stapler'bfth character described comprising a staple pusher slidable on the magazine. Said staple pusher hav sleeve having outwardly extending wings pass ing through the slot for attaching the sleeve tn the push'efi'the pusher fi'irtherniore being pr"o= vifd'ed with means at its front 'ehdto contact the driver blade" andprevent it from getting un= der the drivr'bladf. Still another objector this iiivention is to provide a plier type stapler of the character described in which the frame, staple magazine and the combination handle and plunger driving mechanism is readily assembled and held in assemble'd relation by a single spring made or strip spring material, said spring havingmeans to pivotally move the handle relative to the frame, and also means to rotate the staple magazine relative to the frame andhand'le;

Yet a further object of this invention is to provide a plier type stapler of the character described in which the main frame has hook shaped slots or embossed grooves open at one end so that the pivot pin which pivotally c'onjnects the handle withthe, staple magazine can enter the hook shaped slots or grooves through its open end and 'move into the" hooked end portion of said slots or grooves to be retainedin such position by a spring but permitting the handle and the magazine to be readily diass'embled from the main frame by manipulating the handle in such a way that the pivot pin is moved out of said hook shaped slots or grooves, the construction being such, furthermore, that the hooked ends of said slots or grooves serve as half bearings for the pivot pin;

Yet a further object of this invention is to provide a stapler of the character described in which a one piece anvil is welded or rivetedto the main frame, and said anvil serves to retain the main frame against opening up.

Still another object of this invention is to provide a plier type stapler of the character de scribed which is so constructed that when the handle is first squeezed the staple magazine is first moved with the handle toward the anvnat the front of the magazine until it reaches the work being stapled. Continued squeezing of the handle will drive the bladej against the work while the handle rotates relative to the maga zine, thereby ejecting a staple for stapling the work, the construction being such that the movement of the staple ags-answe ed the frame when the handle is released; is controlled by the" front end of a spring assembled with the mega: zine, and the return of the driver end of the handle and the handleitself to normal position is controlled by the rear end of the spring,

anvil fixed to the front end of the frame being hollow and the front end of the spring being received beneath the anvil.

Yet a further object of this invention is to provide a plier type stapler of the character described in which the lower end of the front cover is provided with clearance to assure that the staple will not clog up in the track, as happens when the device is used fast, without paper between the jaws. In staplers as heretofore made if the machine is used fast without paper being placed between the jaws the closed staple instead of remaining on the anvil remains in the track, and when the machine is used again the next staple instead of being clamped inwardly opens up using the under staple for an anvil. This next staple within the track sometimes jams the mechanism, requiring clearing. By providing a clearance at the lower end of the front wall of the front cover of the staple magazine, any staple that sticks in the front end 'of the track can readily be ejected. The clearance helps the ejection of the jammed staple. Such ejection may be done by putting a pencil behind the anvil and then pressing the pliers to retain the staple magazine against coming down toward the anvil but permitting the blade to be driven, to force out the jammed staples.

A still further object of this invention is to provide a strong rugged and durable stapler of the character described which will be rela tively inexpensive, easily assembled, with can be cleaned easily and repaired easily, which shall be smooth and positive in operation and yet practical and eflicient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts, which will be exemplified in the construction hereinafter described, and of which the scope of invention will be indicated in the following claims:

In the accompanying drawings in which is shown various illustrative embodiments of this invention,

Fig. 1 is a side elevational view of a plier type stapler in normal position, with parts broken away and in cross section,

Fig. 2 is a side elevational view of the handle assembled with the staple magazine and the spring, but removed from the main frame, and with parts of the handle broken away and in cross section,

Fig. 3 is a side elevational view of the staple magazine,

Fig. 4 is a side elevational view of the pusher rod and latch,

Fig. 5 is a top plan view of the structure shown in Fig. 2,

Fig. 6 is a bottom plan View of the structure shown in Fig. 5,

v Fig. 7 is a longitudinal cross sectional view through the staple magazine and showing the front or driving end of the handle,

Fig. 8 is a side elevational view of the stapler and showing the handle fully squeezed, and with parts broken away and in cross section,

Fig. 9 is a front end view taken along line 39 of Fig. 7 and with parts broken away and in cross section,

- Fig. 10 is a cross sectional view taken along line l0l0 of Fig. 3,

Fig. 11 is a bottom view taken along line I ii of Fig. 4,

Cir

Ill

and forward edges as described before.

Fig. 12 is an enlarged cross sectional view taken along line l2l2 of Fig. 8,

Fig. 13 is a cross sectional view taken along line l3!3 of Fig. 1,

Fig. 14 is a cross sectional view taken along line M-hi of Fig. 8,

Fig. 15 is a cross sectional View taken along line i 5-l5 of Fig. 4,

Fig. 16 is a cross sectional view taken along line i6l5 of Fig. 8,

Fig. 17 is a cross sectional view taken along line l?i! of Fig. 6,

Fig. 18 is a cross sectional view taken along line [8-48 of Fig. 6, and

Fig. 19 is a cross sectional view taken along line 59-49 of Fig. 7.

Referring now in detail to the drawings, 59 designates a plier type stapler embodying the invention. The same comprises largely a frame II and handle [2 and a staple magazine 13. The frame H may be made of sheet metal and comprises a top wall 16 from which extend downwardly parallel side walls 11. The top wall it has a front edge 18 and a somewhat downwardly curved rear edge [9. The side walls ll have front edges 20. Extending rearwardly from the lower ends 2! of the front edges 20 are end edges 22 extending rearwardly about one quarter the length of the frame. Atthe rear ends of the edges 22 are substantially semi-circular downwardly and forwardly curved edges 23, from which extend forwardly and downwardly edges 24. The top wall !6 of the'frame has a substantially horizontally intermediate portion 15a from which extends forwardly a downwardly sloping portion IBD, and also from which extends rearwardly and upwardly, sloping portion 560. The edges 28 may be'inclined somewhat forwardly and downwardly. The edges 22 are substantially at right angles to the edges 20 but are inclined downwardly and rearwardly.. The edges 2% are inclined downwardly and forwardly substantially the same angle as the edges 22, thus forming a mouth or jaw at the front end of the frame.

Extending downwardly from the front ends of edges 24 are downwardly extending edges 25. Extending from the side walls I! just rearwardly of the curved edges 23, are neck portions 26 from which extend forwardly, lower jaw portions 21. The lower jaw portions 27 haveupper edges 24 Extending inwardly from the lower ends of portions 2'! are aligned fiat portions 28 having meeting edges 29. Said walls or portions 28 are inclined downwardly and rearwardly. Extending from said walls 28 are upwardly curved portions 30 terminating in edges 3 I. The side walls !1 have rear edges 33 extending down substantially vertically. Extending from the edges 33 are downwardly and forwardly sharply inclined edges 34 from which extend forwardly horizontal edges 35. The edges 35 extend to the neck portions 25. Extending from said edges 35 aredownwardly and forwardly curved edges 36 forming a pair of small symmetrically disposed, hook shaped, outwardly embossed grooves or slots 53 (Figs. 1 and 13). The grooves or slots 49 are open at the rear edges 35 just above the edges 3| forming mouths. From said mouths said grooves extend forwardly as at 4 I, decreasing in width. Extending from the portions 4| of said grooves are upwardly and rear- Wardly curved portions d2 terminating in semicircular groove portions 43 forming semi-circular half bearings for the purpose hereinafter appearmg.

"The-centers of the -=semi"-circu1ar half-tearing: portions 43 are in' ahoi izontal "-plane bisectingf thesemecire flaredgesm;

. Within th'ei r ame lit-is the staplezmagazine le. Said staple magazine 13 (Figs; 2 and 'i' comstare-spaced hem one ri'othef, form ing a slot theretetween; Bet-tom want-t ts rorm wat its-rear edge 54' with-1 a pair of parallel notches Or-S'lots 55,"likijace'llt the side Walls 52; The slots 55" are similar and symmetrically dispesed' one with re pe t tethe other; 'Th 'e bottoin wa i'er furthermore has a front: edge" 56' spaces treat} wardly-ofthe front edges 5f! of the side" walls 52'. Said frontedge "SG is-E'Qrmedat its-ends withei pair;

extend to the sid'e walls 52 and aresim-il'ar and s mmetrically disposed one with respect-tethe other; "rne totmmwan' si is erm-eewithet ans ve'rseslot' 59 (Fi'g. e) a11e the-sidewalls 52- are formed with -do wnwardly extending ears F01 Th earsfill maybe made from the metal taken from the teem-m wall to form the slot 59]. The ears 6U are formed with aligned openings 6 I through which is inserted a pivot pin 62', extending be: yondsaid ears, as at 63, shown in Fig}. 6 of the drawing; for the purpose hereinafter appearing.

Thj l ivot pin 62} is thll's located somewhat belowthe nnderSide of 'theb'ot-tom wall 51 Extend ing upwardly from the inner ends of the'i'ront p ti ns. f the'fiane's 53 of wallet? areparall'ei neck portions 6 1. Extending outwa'rdlyfroxn said neck. n s 3 a e; flan s 'fiiintra l t he flanges 53. Extending upwardly from thefianges 65 are sidewalls Eli in'yalighment with sidewalls 52. Extending inwardly front the side w ns ts arealignedfront flanges 6] (Fig; 5'). The inner" edges offsa'id flanges" 6T are-spaced apart" to form a slot 68 thereb'etvv'ee n, for the purpose herein": after a pearing; Th-aside walls 52 are formed;- just rearw ardly of the slotsf58 with a pair of notches 69 (Fig. The notches are aligned withoneanother; M I, 4 x g I v Attached to the: front en'dfoi the body Bil is a front cover UL Said front cover 'jmfhas a front wall H- formed at the sides thereof with'yeap weirdly recessed shoulders 12 (Fig); 6-). EX-tending froni the shoulders 12 are-parallel side-wens I3; Said WaII'sIWcOntact the outer surface; oi the side walls 66 fiFigs'. 5 and 10). The shoulders 12 eontactthe front edges 579i the sidewalls'jjg of the body 50. Theside walls ,lhmay be spot weldedto the side walls 66' or riveted er otherwise fixed thereto; The lower edges of the side walls 13 are flush with the undersi e er the bot-- tom wall 5]. Theiro'nt wall ll of cover T01 is formed with a; central longitudinal slot which re isters with the slot' as between. flange 6-1 or side w lets} The front wen H is} stat d mm the: flanges 51 of side' ,wall's'lifi' leaving a track It therebetween. The front edges 51; oi the side walls 52 contact the-inner sides or the shoulders 12'. The side walls-13 areformed with' indenta tions is; w ch are received within the notches 69 of sidewalls 5 2: soas to" accurately locate the front coverrelativeto the staple magazine-body. to insurelan accuratetrack for a plunger'or driv er blade 30 slidably mounted' in the track 16, and also forthe staples 8| which are driven from the staple strip as Will be explained hereinafter.

Thewlower end .ofl h I is formedwi-th a notch la' terminating inwardly front wall 1 l of cover dfthe isidewallsn fbr the purposehereinafter appearing. v

Eixed within the body -5'0is a staple guide -83" (Figs. 7' and 17):. Said stafileguide e3 comprises;

a top wall' '84, parallel to the flanges 53, and spaced :therebelow. Extending downwardly from thetop' wall" 84 are side walls 85 paraneito and spaced inwardly of the side WallsBZ. Thus, be--' tween the guide 83andthe body '50 i's 'a' channel shaped chamber throug h which the staple strip passes. Punched from the top' wall 8Tare'downa wardly extending tongues 84a having tabs 86 at their lower ends welded vto the upper surface of the bottoin'wall' 5 I The rtun'ching'of the tongues 84'a form slots 81 in thetop wall 8' 1. A pair-oi sai'd'tongues are' shown in (Fig. 7). 'Th'e' i'ea'r slot side walls are formed withtongue extensions 991 projecting into the slots 5'8 and contabting the inner edges of said slots. 'With such co nstruo'tion the staple guide 83- is not only semiatel'y centered with respect to the magazine; body; but lengthwise shifting or movementof the staple guide, relative to the maga'zine'hody} is prevented. H

The front edges 9T of the side walls KS Of the staple guide 83' are in alignment withthe front edges 51' of the sidewalls 52' and hence s aced rearwardlyfrom the front walls 11' of end sufficiently to provideaf track through which the foremost staple 8*! may be ejected by t e blade 30. The staple strip; designated by the letter S, thus rides onth'e' guide-83 and within the body. 7 v

Pusher means is provided to" press the staple strip "S fOlWa rd 1y against the from Wall 'H. To this end there is sl'id'ablv mounted on the staple guide 83a pusher 93 o'ffchanne1 shapeand having a top Wall 94 and? downwardly extending side parallel walls 95. The topwalle' i is formed adjacent its forward edge with a" slit fil andthe metal in front of the s litis pushed upwardly to, form an upwardly projecting strip sl the front I edeof which is flush" with the front e ge (if the pusher asp, whole. if 'al'l the staplesiare' usedu-p the strip 91' will' cont'aot the front edge of the blade and will not allow the pusher to move beneath the blade:

the upwardly recessedportion 98 is a sleeve member lllii for slidablycarryingia pusher rod NH. The sleeve member IOll comprises a' split sleeve" 102' from which extend contacting portions I63 passing through the slot 99. Extending outi wardly from the lower ,ends or the contacting portions Hi3 are wings [04 engaging the eraser:

sideof the upwardly recessed portion;

The: puSh I'Od" mlis formed' with a" flattened stop me Q05 at its irontlend. Riveted to; the

.reafr end of the push rod ml is a latch member me for disengage'ably connecting'th'e, recite the stapleguide. Saidfllatch member I06 comprises a vertical wall" 101 forrhedwith a through opening-through which the push rod passes. The rear end of the push rod i s riveted to the wall [01.

Extendingforwardly from the lower end 6f the wall I! is a horizontal wall I08. At the end of the wall I08 is a bent back portion I 99 from which extends a downwardly and rearwardly inclined wall IIO. Extending downwardly from the rear end wall I I0 is a tab I I I. The bent back portion I09 is formed with a slot and the metal taken from the slot is pressed forwardly and upwardly to form lip I I2. Wall I98 contacts the underside of wall 84. The lip II2 engages the edge88 of the top wall 84. Pressed from wall H0 is an upwardly extending strap shaped lug H3.

It will be noted that the engagement of the lip II2 with the edge 88 retains the push rod on the guide member 83. The wall IO'I contacts the rear edge of the top wall 84. The tab III contacts the rear edge of the bottom Wall i of the body 50. By pressing upwardly and rearwardly against tab III, lip H2 is disengaged from edge 88 and the pusher rod can then be pulled rearwardly off the guide.

Interposed between the sleeve I 89 and wall I9! is a coil compression spring II4 which normally pushes the pusher 93 forwardly. The forward end of the pusher engages the rear end of the staple strip S to press the foremost staple 8I against the rear surface of the front wall II. In such a position, the foremost staple 8I is in the track 16, and when the plunger 89 is depressed, in the manner hereinafter explained, said staple will be ejected.

Mounted on the bottom walls 23 of the lower jaw of the main frame I I is an anvil I I5 against which driven staples are pressed. The anvil IIE comprises a top wall I I6 (Fig. 16) from which extend downwardly side walls I I1. The side walls II! contact the inner surfaces of the side walls 21. Extending downwardly from the front end of the wall H6 is front wall H8 interconnecting the walls H1. The Walls II! are preferably welded to the side walls 27. The anvil thus interconnects the walls 28 and serves to retain the main frame from being pulled apart. The anvil furthermore holds the side walls ll of the main frame in parallel relationship with each other. The upper surfaces of the top wall I I6 of the anvil is formed with the usual notches H9 for opening inwardly arms Bill of the staple BI, as shown in Fig. 12 of the drawing.

In the event that the stapler is used fast without a paper within the slot 27a, between the lower jaw 27 and the upper jaw or the upper front portion of the frame, when the blade is released, it will rise and instead of the closed staple remaining on the anvil it may remain in the track. The next driven staple instead of being pushed inwardly may then open, that is, the arms Bla might engage the stuck staple which serves as an anvil and will be pushed outwardly. Such action causes jamming of the staples. By providing the clearance IIa in the cover III, a pencil may be inserted behind the anvil H5 and within the slot 27a between the jaws, and the next time the plunger is pressed downwardly, as will appear hereinafter, the track will be cleared of the jammed staples.

In assembling the staple magazine with the main frame I I the outer ends 63 of the pivot pin 62 are pushed through the mouth of the embossed grooves or slots 49 (Figs. 1 and 13) and work into the half round hook ends 43 of said grooves which serves as a bearing for the pivot pins, allowing rotation of the staple magazine I3 relative to the frame II.

The handle I2, as will be explained hereinafter,

serves as a means for depressing the blade 80. Said handle I2 is a combination handle and driver and may be made of a single piece of properly shaped sheet metal. Said handle comprises a downwardly and rearwardly curved bottom wall I29 from which extend upwardly parallel side walls I2I. Extending from the side walls I2I are longitudinal inwardly extending shoulders I22 from which extend upwardly, parallel side walls I23, slidably engaging within the inner surfaces of the side walls I! of the main frame (compare Figs. 1 and 8). At the front ends of said walls I2l are shoulders I24 from which extend forwardly and upwardly, parallel walls I25. The walls I25 are formed with aligned circular outwardly embossed hub portions I26 (Fig. 13), c0- axial with the pivot pin 62. The portions I26 are formed with central bearing openings I21 for the outer ends of the pivot pin 62. The portions I25 are inclined upwardly and inwardly as shown in Fig. 8 of the drawing, and extending forwardly therefrom. are portions I38 from which extend portions I3I inclined toward each other and decreasing in height. The portions I3I thus have downwardly and forwardly inclined upper edges I32 terminating in forwardly extending contacting fingers I33 passing through the slot 83a in the upper end of the blade 88. Thus the fingers I33 pass through the slot 15 in the front wall II. It will now be understood that when such handle member I2 is squeezed and moved in a counterclockwise direction, looking at Fig. 8 of the drawing, the fingers I33 will depress the blade 89 as the fingers move through the slots I5 and 63. The lower endof the blade will then depress the foremost staple 8| of the staple strip S thereby forcing the arms of the staple against the anvil. The contacting fingers I33 may be welded to each other or otherwise attached together if desired.

It will be understood that the handle member can rotate relative to the staple magazine and also relative to the frame, and that the staple magazine can also pivotally move relative to the frame and handle member.

Spring means is provided to control the pivotal movement of the handle and the staple magazine. To this end there is provided a spring I35 (Fig. 2) made of a strip of spring steel. Said spring I35 comprises a portion I36 which passes between the pivot pin 52 and the underside of the staple magazine body 53. The pivot pin is spaced sufficiently from the underside of wall 5| to permit the spring to pass between said pivot pin and said wall. Portion I36 is formed at opposite sides with notches I 3'! (Fig. 6) to receive the arms 69 and thereby to prevent longitudinal shifting of the spring relative to the staple body. Extending forwardly from portion I36 is a downwardly inclined portion I38 from which extends a downwardly inclined tongue I39. The tongue I39 is received beneath the anvil. The underside of the anvil is hollow, and thus the tongue I39 extends between the wall I I6 of the anvil and walls 28 of the bottom jaw of the main frame. In inserting the tongue I39 into the anvil said tongue must be pressed upwardly and has a tendency to press downwardly against the bottom of the lower frame jaw for urging rotation of the staple magazine in a clockwise direction relative to the frame.

Extending rearwardly from portion I36 of the spring I35 is a downwardly curved portion I49 from which extends a bent back portion I4 I. Extending from said bent portion I M is a forwardly extending tongue I 42 which contacts the upper at ract? surfaces of the; bottom: walls-1:20. of the handle. "lllieispringf portions 14.11;. 1411 and. M21 tend. to press d'ownwardlvaga'inst the "rear end:- of the handle and therebyurgerotation' of the; handle in ass-clockwise.idirectionrelative to the frame. JIh'e;istaplemagazinei'isfnormallyin the. position sh'oiwrriir Fig; '1' of'the drawing; Whenthe rear: end "ofithe handle is squeezed upwardlyitowardt'the frame; the staple: magazine. is. first to:- tat'ed by'the rearfendl of the springin a counterclockwise. direction to depress the forward .end of. :the' staple: magazine: When. the. front: end of the. stapletmagazin'e contactstthe paper or'wor-k to-be stapled, itstops rotating. ;However; :the squeezin gmovementof thehan'dle will causerthe plunger or: blade ,80 to: bedepressed :to driver the staple" through; the work. The workzfisadesignatedxin the drawing. by the: letter, W. (see-.Fi'g. 8).. When-thehandleisthen released the handle will first. rotate relative to the. staple: magazine until; the fingers I 3 3 reacht'he" top of the?slot1l5; then both the-. hand'leand the staplemagazine will; rotatein a clockwise direction together, :relative to, the frame, back to normalposition;

Itwillbe notedthat the pivotpin locks the spring to themagazine; In assembling the device; first take the staple magazine, lay in the spring in position, insert thedriver blade in the staple magazine so; that the top ofvthe blade is'zfiush withgthe. top of, the front; cover, then slip the; handle ontothe spring, from: the rear of the niagizine. Locate thefrqnt end ofthe'driver fingers I33 on the handlewithinthe slotted blade .15 registering in theslot in the front cover, and

with the front end of the handle passing through both slots. Align" the holes :of' the handle with the pivot holes of the magazine frame. Then insert'the pivot pin, making sur'ethat'the spring I35 is between the pin and the 'niagazine. The outer ends of'the pin will protrude sufliciently on both sides of the handle to form a pivot to assemble, with the mainframe. The ends of the pivot pin are passed through the embossed grooves dolthrough their rearends andthe pin ends are worked into thehoohed' inner ends- I-B of the embcssed grooves It will he noted that as the ,handle is "squeezed the. pivot pi-n presses upwardly; the b a ing.v 4 3 to. keep the pivot pin ends their; hooked, bearings; .When you squeezeythe? handle youifirst rotate- .the staple magazine with the. handle. .When. the magazine reaches; the work; being stapled, continued squeezing drives the blade because the handle then rotates relative to the magazine. The movement of the front end of the magazine toward the cover is controlled by the front end of the spring. The return of the driver end of the handle itself to normal position is controlled by the rear end of the spring.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention I claim as new and desire to secure by Letters Patent:

1. A plier type stapler comprising a frame having side Walls formed with a pair of aligned hook shaped slots each formed with a mouth at one end and: with. a half round: bearing at its opposite endi'r'a; staple magazinewithinthe frame, a pivot pin on said staple magazine, the outerends of said pivot pin engaging saidhalf rou-nd bearings 'of said slots, and a ha'ndle having-J side walls, located between the staple magazine and the side walls of th'e frame and formed withbearing openings through which the ends of the said pivot pin pass; theouter' ends ofth'e' pivot pin being movable through said hook shaped slots for withdrawing the handle and magazine-from said frame, said magazine including means to carry a-s'tapl'e-"stripga driver blade-for ejecting the foremost staple in the staple strip; and said handle having means to engage said bladefor moving the -bladerelative 'to the staple magazine. r

f2; A plier type stapler comprisingaframe having si'de walls formed with a pair of aligned'hook shaped slots each formed with a mouth atone endand with ahalf'round bearing-at its opposite end, a staple magazine within; the frame',-'a pivot pin on said staple magazine, the outer ends of said pivot pin engaging saidhal'f round-bearings of-said-slots; anda handle having: side walls; located between the staple magazine and the-side walls of the f-rame 'and formed with bearing openings through which the ends of the said pivot pin pass; the outer ends of the pivot pin beingmovable through said 'hooksha'pedslots for withdrawing the handle and magazinefrom said frame, said magazine including means it carry a staple 5 strip, a driver blade for ejecting the foremost staple in the'staple strip,andsaid handle having means -to I engage said blade for mov ing the blade relative to the staple magazine, springmeans to rotate" the staple magazine relative t'o the fr'a'me -and' springmeansto rotate the handle relative to the staple magazine.

' "3. A-plier typestapler'comprising'a frame having a top wall and downwardly extending side walls, said sidewalls having down-ward extensions from which'extend forwardly; 'lowenjaw members, spaced from the forward end's of"the side Walls of-the frame, an anvil'mount'ed on said lower jaw-members; said extensions-having h'o'ok shapedslotseiach slot having arearwardly'opeiiing mouth from which-the slot extends-forwardly and' then upwardly, terminating ahalf bearing; a s'taple' magazine within said frame; a pivot pinch-said staple magazine, the outerends-of said magazi ne being" adapted" "to pass into said slots and said T outer ends of said pivot pin being movable into the half bearings, a handle pivoted on said pivot pin and having side walls located between the staple magazine and means on the handle to engage the blade from moving the blade upon squeezing the handle relative to the frame.

4. A plier type stapler comprising a frame having a top wall and downwardly extending side walls, said side walls having downward extensions from which extend forwardly, lower jaw members, spaced from the forward ends of the side walls of the frame, an anvil mounted on said lower jaw members, said extensions having hook shaped slots each slot having a rearwardly opening mouth from which the slot extends forwardly and then upwardly, terminating in a half bearing, a staple magazine within said frame, a pivot pin on said staple magazine, the outer ends of said magazine being adapted to pass into said slots and said outer ends of said pivot pin being movable into the half bearings, a handle pivoted on said pivot pin and having side walls located between the staple magazine and means on the handle to engage the blade from moving the blade upon squeezing the handle relative to the frame, a spring made of strip spring metal and having a portion disposed between the pivot pin and the staple magazine, a portion extending forwardly from the first portion and engaging the lower jaws of the frame and a portion extending rearwardly from the first portion and interposed between the handle and the underside of the staple magazine.

5. A plier type stapler comprising a frame having a top Wall and parallel side walls, said parallel side walls being formed with slots extending rearwardly from the front ends forming lower jaws, said side walls being formed with outwardly embossed grooves, said grooves opening to the rear and extending inwardly and then being curved upwardly and rearwardly terminating in half round bearings, a staple magazine comprising a staple body having side walls and a bottom wall and ears extending downwardly from said side walls and said body, said ears being formed with through openings, pivot pins extending through the openings in ears and extending beyond said ears at opposite sides, the outer ends of said pivot pins projecting into said slots, a handle member having rearward handle extension disposed below said staple magazine and said handle extension having side walls disposed between staple magazine and the side walls of the frame, said handle member being formed with bearing openings through which the ends of pivot pin pass, and said handle member being provided with a forwardly extending finger, said staple magazine comprising a front cover attached to the front end of the magazine body and formed with a slot, a staple guide fixed within said body and forming a track with the front wall of the cover, a driver blade within said track, said driver blade being formed with a slot, the forward end of said handle member passing through the slot in the blade and projecting into the slot in the first cover.

6. A plier type stapler comprising a frame having a top wall and parallel side walls, said parallel side walls being formed with slots extending rearwardly from the front ends forming lower jaws, said side walls being formed with outwardly embossed grooves, said grooves opening to the rear and extending inwardly and then being curved upwardly and rearwardly terminating in half round bearings, a staple magazine comprising a staple body having side walls and a bottom wall and ears extending downwardly from said side walls and said body, said ears being formed with through openings, pivot pins extending through the openings in ears and extending beyond said ears at opposite sides, the outer ends of said pivot pins projecting into said slots, a handle member having rearward handle extension disposed below said staple magazine and said handle extension having side walls disposed between staple magazine and the side walls of the frame, said handle member being formed with bearing openings through which the ends of pivot pin pass, and said handle member being provided with a forwardly extending finger, said staple magazine comprising a front cover attached to the front end of the magazine body and formed with a'slot, a staple guide fixed within said body and forming a track with the front wall of the cover, a driver blade within said track, said driver blade being formed with a slot, the forward end of said handle member passing through the slot in the blade and projecting into the slot in the first cover, an anvil mounted on said lower jaws and a spring made of spring strip steel and having a portion clamped between the pivot pin and the underside of the staple body and a portion extending forwardly of the first portion and engaging beneath the anvil and contacting said lower jaws, and a portion extending rearwardly from the first portion and interposed between the rear handle extension and the underside of the magazine.

FRANK S. BOROUGHS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,983,397 Polzer Dec. 4, 1934 1,994,567 Cavanagh May 19, 1935 2,040,647 Fodor May 12, 1936 2,088,404 Bunnell July 27, 1937 2,165,572 Pankonin July 11, 1939 2,310,529 Krantz Feb. 9, 1943 2,438,712 Lindstrom Mar. 30, 1948 2,461,165 Lindstrom Feb. 8, 1949 2,469,984 Pankonin May 10, 1949 2,469,985 Pankonin May 10, 1949 2,472,032 Wandel May 31, 1949