US2702384A - Stapling machine - Google Patents

Description

Feb. 22, 1955 H. RUsKlN 2,702,384

STAPLING MACHINE Filed Dec. 7. 1949 2 Sheets-Sheet l 52 g5 5 37 50 3 28 2f 15 2 u K A z ORA/EY United States Patent() STAPLING MACHINE Henry Ruskin, Bayside, N. Y., assignor to Speed Products Company, Inc., New York, N. Y., a corporation of New York Application December 7, 1949, Serial No. .131,600

41 Claims. (Cl. 1 3) This invention is a miniature stapling machine wherein the cover is adapted to be bodily shifted rearwardly relative to the magazine for promptly inserting a staple Strip in the latter. 'One object of the invention is concerned with the 4provision of a normally compressed coiled spring `straddled by spaced cheeks of a slidably guided staple vpusher adapted to extend this coiled spring in proportion to the size of the staple strip inserted within the magazine and adapted to apply a reactive thrust to the staple strip for urging the latter vtowards the staple ejecting guideway at the front part of the magazine. Another important object resides in the provision of a cover slidably guided bythe magazine to prevent upward displacement of the staple strip 'within the magazine and carrying a normally elevated staple driver having a biased shank spaced from and above the cover and including Va rear part Aanchored to the rear portion of .the cover and including at its forward end a depending blade slidably guided at the front end of the linearly guided cover. Another salient object resides in the provision of a spindle or 'rod to which the front end ofthe extendible but normally compressed spring is anchored and having at .its rear end Va hooked shaped member detachably interlocked with a depending rear Vvportion or block of the linearly guided cover. Another object resides in the provision of a one Vpiece magazine to which is secured in part a leaf spring having a rear arcuate portion con stituting a cantilever for disconnectably "interlocking with the slidable cover to maintain the latter in a closed relation with the magazine. A further .object has to do with the provision of Ameans on the driver for interlockingwith a plastic casing which conceals the driver. Other important objects will appear .from the following description taken with the accompanying drawings:

Fig. 1 is a side elevational v iew of the miniature stapling machine according to my invention shown in its actual full size.

Fig. 2 'is a view similar 'to Fig. 1 however showing the magazine Opened to receive `a supply of staples.

Fig. 3 is v4a plan view of Fig. l.

Fig. 4 is a front view `of Fig. l.

Fig. 5 is a rear view of Fig.v 1.

Fis. 6 is a `plan view of 'Fia '2.

6A isV a sectional view on the line oA-.6A of lFig. 6b is .a sectional view on the line Ab--bof Fig. 6.

-AFig. 7 is a sectional v-iew on the line 7-7 of Fig. 3 however ,with the case removed to illustrate the rectilinearlyguided cover carrying the depress'ible catch and having 'its rear block interlccked with an arcuate cantilever portion of a leaf spring secured to the bottom wall of the magazine, and illustrating the driver normally raised with .the blade thereof slightly above the foremost staple of the staple strip confined within the magazine.

Fig. .8 is a sectional view taken on the line 8-8 of Fig. 7 however with the staple strip partly broken away to .illustrate the expanded relation of the normally compressed follower spring.

Fig. 8A is a sectional view on thelinefSzz-.a of Fig. 9.

Fig. 9 is a sectional view on'the iine 9--9 of Fig. '1.

Fig. 10 is a'sectional view on the line `1010of Fig. l.

Fig. 1l is an Yunderneath plan Vview vof the staple follower and Aslidable cover and illustrating the extendible follower spring Vin .its normally compressed relation.

Pig. 111 is a 7perspective view 'of `the `follower shown inverted on its guide spindle -to illustrate `the normally compressed spring.

Fig. 1lb is a view similar to Fig. 1la but showing the normally compressed follower 'spring extended.

Fig. l2 is a top View of the magazine shown 'attached to the swingable base.

Fig. 13 is a bottom view vof the magazine and base in an unfolded relation.

Fig. 14 is a side view of Fig. 1'3 with the magazine swung away from the base .in the `direction indicated by the arrow.

Fig. 15 is a perspective and inverted View of `the plastic case.

Fig. 16 is a perspective view showing the driver secured to the cover.

Fig. 17 is a fragmentary view illustrating the manner of interlocking the rear end of the cover with the lrear end of the magazine.

Fig. 18 is a sectional view on the line 18-18 of 5Fig. 8.

Fig. 19 is a fragmentary view on the -line 19-19 of Fig. 7, and

Fig. 20 is a perspective view of the catch.

The miniature stapling machine SM includes inter alia the swingable base B, the Vmagazine M, the slidable cover C, the case CS, the staple pusher SP, the normally compressed but extendible coiled spring ES, the staple drivesgenerally denoted D and the locking leaf spring LS.

The staple magazine M (Figs. 6 and 9) is a one piece hollow member vhaving the spaced upstauding sides -10 merged with the front transverse wall FW, having margins 11 and the intermediate outwardly conveXed portion 12. The lower wall of the magazine is characterized by the inwardly turned iianges 13 defining with the front wall 11 lthe alined gaps 15 constituting a staple guideway for the foremost staple for the staple strip SS closely guided by the spaced sides 10.

Fixedly anchored within the magazine along spaced flanges 13 by (Fig. 13,) suitable pins 16 is theliatleat` resilient spring LS which extends rearwardly beyond anges 13 and between sides V10 and embodies the .downwardly curved terminal 18 (Fig. 7) to constitute a re-v flexed cantilever spring extending beyond the magazine.

ASides 10 of the magazine are interrupted by the alined slots 19 Whichreceive wings or lugs (Figs. 9 and 11) e1;- tending laterally of the cover C. By such construction cover C is slidably or linearly ,guided relative `to 'the magazine to provide for opening of the magazine (Fig. 2) to allow loading or dropping a strip of staples therein when desired. VThe laterally extending lugs l20 strike the rear Walls of slots 19 to .limit opening of the cover C which when closed serves to limit 'upward displacement of the staple strip.

The slidablyguided cover C is provided at its frontend with a T-shaped extension TS having its reduced portion or neck 21 projecting into elongated rectangular opening 22 of the driving blade DB forming a part ofthe staple driver generally denoted D whichy is in the form of a one piece spring having its 4rear part 61 fastened by spot welding to the rear end of cover VC or by rivet 24.

The T-shaped lug 23 is vintegral with part 61 and extendsV beyond the downwardly turned lug or block 26 of the cover C. This block 26 is provided with a reduced projection 27 .adapted to snap into and 'interlock with opening 28 -at the rear part of the locking spring LS having struck out therefrom the downwardly extending arcuate spring finger 3 0 coacting with base B to hold magazine M in spaced relation .to the base and appreciably away from the staple clinching anvil A.

The base B is a one piece metal stamping lembody-ing the spaced upstanding sides 31 having rear .extensions 32 (Fig. 14) interposed between andstraddled by the .spaced ears 33 'extending from `and at the rear of the spaced sides 10 of the magazine. Fulcrum pin 34 pivotally holds ears 33 to extensions 32. By the present arrangement base B when in an opened relation may .be swung under the magazine to its clinching position shown in Fig. 1 or base B may be swung to rear of the magazine (Figs.13 and 14) in which case the stapling machine may be employed as a tacker `as is well understood.

The spaced sides '10 of the magazine include the .alined detents or projections 36 vadapted to snap 'into 'and re movably interlocked with the alined apertures 37 in the spaced upstanding sides 31 of the base B at which time spring or tongue holds base yieldingly spaced from the magazine.

Referring back to the at spring driver D, theinter mediate part or shank 38 thereof slopes upwardly and forwardly away from the rear part of cover C. For strengthening purposes shank 38 includes the longitudinally arranged rib 39. The sloping shank 38 also includes the locating opening 40 (Fig. 7) for receiving projection 41 (Fig. 9) depending from the top wall TW of the oating but ornamental plastic case CS pursuant to projection of manipulating portion 70 and the upper part of wall 71 of the depressible catch K into opening 42 at the rear of the case CS.

Catch K has its forwardly projecting wings or sides 72 extending from wall 71 provided with depending shoulders or cams 73 seated on the arcuate terminal 18 of leaf spring LS, thus holding catch K normally elevated. Of importance, depending shoulders permit catch K to be rocked or tilted when the head or manipulating portion 70 is depressed, thereby downwardly deilecting terminal 18 from projection or lug 27 of the cover C thus unlocking the latter to permit both casing CS and cover C to be linearly and bodily displaced from the front part of the magazine. This action is possible in that after casing CS has been mounted on and to straddle the slidable cover C, projection 41 is upset, thereby retaining the casing'CS in place. However it should be observed that the tiltable catch K is also retained in place and loosely on the reduced neck 25 which forms a part of the T shaped lug or tongue 23 extending rearwardly from the slidable cover. Specifically neck 25 projects through vertical slot 74 in wall 71 of catch K and the latter is maintained thereon by the head of the T shaped lug 23. By the arrangement disclosed, catch K may be said to freely and slidably straddle the T shaped lug 23 and may be conveniently displaced relatively thereto by depressing the accessible crank or manipulatable portion 70. In the assembled relation of the stapling machine, catch K is normally held raised by the cantilever spring 18 permitting manipulating portion 70 to be spaced from and above boss 77 of casing CS provided with depending lng 79 which serves to conceal parts of the internal construction of the stapling machine and also serves as a rest to support the latter.

The driving blade DB of the one piece driver D is Y slidably confined and guided in the spaced notches 44 (Fig. V19) defined by the web or neck 21, the shoulders 45 of the cover C and the shoulders 46 of the head H ofthe .T shaped extension TS.

On closing of the magazine, cover C slides towards the front Wall of the latter at which time reduced projection 27 of the block 26 of the cover snaps into opening 28 of the locking spring LS. At such time the cover or staple driving carrier C is prevented from longitudinal displacement relative to the magazine at which time also (see Fig. 17) the rear laterally projecting flanges or wings 48 of the cover C are within the reentrant and alined notches 49 at the rear of the magazine to interlock therewith to prevent bodily upward ktilting of the cover or carrier and driver.

Arranged within the magazine and riding along the spaced anges 13 thereof is the staple pusher SP which is in the form of an inverted U-shaped rectangular member having the top wall 50 (Figs. 8 and 18) and depending spaced sides 51 (Fig. 11a). Offset outwardly at the forward part of sides 51 are the spaced fingers 52 co operating under the action of the extendible spring ES to urge the staple strip SS forwardly towards the staple guideway defined by the alined gaps 15 (Fig. 12) for receiving the foremost staple of the staple strip and under driving blade DB. Y

More specifically the staple pusher SP is slidably guided along a cylindricalspindle 53 having a flattened hook 54 at its rear ,end which is adapted to be received in opening or notch 55 of block 26 of cover C to removably interlock with the latter. By this action the rear end of the spindle is held spaced from the bottom wall of the magazine. The intermediate part of the spindle is also effectively retained between spaced cheeks or bearings 56 turned inwardly of the sides 51 of the pusher SP. Cheeks 56 (Fig. 18) rotatably straddle spindle 53 and when thelatter is unhooked from the cover or carrier C 4 and if this pusher be removed from the magazine, the pusher may be rotated relative to the spindle.

Loosely encircling spindle 53 is the normally compressed coiled spring ES. The rear end of this spring is slightly spaced apart to define parts AA and BB (Fig. 11) to receive and straddle cheeks 56 whereby the rear portion of this spring acts as an abutment when the spring ES is extended from its normally compressed relation. Such action takes place after insertion of a staple strip within the magazine since the forward end of spring ES is anchored to the front of the spindle. This is readily accomplished by flattening the front coils FE against the reduced front end RE of the spindle.

In the assembled and closed relation of the stapling machine, the driver D is raised as illustrated in Fig. 7 with the blade DB thereof just above the front staple. The casing CS is held locked and secured to the carrier or cover C and telescopes over the top part of the magazine and conceals the cover Cand the driver. Since as shown there is a supply of staples within the magazine; spring ES is extended, namely,.pulled rearwardly due to the' coaction of cheeks 56 against coils BB. In this connection, it should be observed that the pusher is also slidably or linearly guided on spindle 53 by the straddling spaced cheeks or guard means 56. Thus the greater the supply of staples within the magazine the greater will be extension of the extendible spring ES away from its anchored front part FE. Stated in another way, spring ES is an elastic member having its front end anchored to the spindle or rod 53. Consequently if the cover be opened and thereafter closed, the action of cheeks 56 of the follower causes the spring ES to stretch away from the anchored end in proportion to the size of the staple strip inserted into the magazine. This tension on spring ES is utilized reactively when the spindle is locked to the carrier C to always urge the staple strip forwardly whereby upon depressing of the casing CS, the driver D which is secured to the casing, is correspondingly depressed to permit blade DB to expel the foremost staplel against the anvil A for clinching purposes.

To unlock the cover, terminal 18 is flexed away from the stop or fulcrum pin 34 and downwardly by' cams or curved lips 73 on depressing Vof the slidably guided but tiltable catch K, thus unlocking block 26 of the cover C from leaf spring LS. With this accomplished and where the magazine is empty of staples the casing is initially shifted automatically, that is, partially rearwardly to open the magazine due to the residual tension in the extension spring ES and thereafter the casing is manuallyk shifted to further and fully open the magazine to allow full reloading thereof.

Where the last staple in the magazine has been ejected by the driving blade DB, spring ES is almost fullyV compressed. To reload the stapling machine, catch K is actuated to permit opening of the magazine, and the cover C is rearwardly displaced. At this time the staple pusher SP is correspondingly. and rearwardly displaced, permitting dropping of a staple strip into the empty magazine. On closing of the magazine, casing CS is thrust towards the guideway. Thus fingers 52 of the staple pusher abut the rear end of the staple stripY andcome to a stop yieldingly abutting the staple strip. However cover C and casing CS continue to slide towards the staple guideway of the magazine, causing spring ES to progressively expand. Eventually ca ms or shoulders 73 is under maximum tension or extension which progressive,

ly decreases in proportion to the number of staples driven from the magazine but as previously mentioned, spring ES is never .completely collapsed, hence always at this time urging the staple pusher forwardly. VWhere the hinged magazine is loaded with staples andthe slidable cover C is closed and locked, spring ES is under appreciable tension. If therefore catch K be depressed, cover C is unlocked and spring ES contracts, thus automatically sliding cover C to fully open the magazine.

It should be observed that due to the biased or offset part 60 of shank 38, the swingable driver D is normally maintained in a raised position. This action is possible in that rear part 61 which embodiesvthe overhang-v ing T shaped projection or tongue 23 is permanently anannesse S chored Lto the cover., thereby :also :providing fa: localized hinging 'area for .shank 38 :at the conuence of the rear part 61fand the stifenedihiased portion .60 of 'the driver. It should also be 'observed that `terminal .18 is maintained normally yunder tension against fulcrum pin 34, preventing its `full retraction.

vlf desired, the herein `described machine may be .employed as a .tacker vby rst overcoming the frictional :relation between detents 36 in Yapertures L37, :and thereafter swinging the hinged base rearwardly and away .from the magazine.

'The stapling machine just described Vis of .the 'miniature type and particularly adapted to be carried `vabout the person lfor prompt use. It is also adapted for childrens use in schools or within .the home, since :itis couvenient .to operate and .requires no special Askill V.to load with staples.

Various changes :may be made in ldetails of construction aud arrangement vof Aparts without departing .from the :scope of the invention or sacrificing any of the advantages thereof inherent therein.

.Ti :claim:

-1. .In a tstapling machine, a magazine for housing La strip vof staples and having a guideway, a Vcover for said magazine, said cover and magazine including means for slidably guiding said cover -to open or close .said .magazine, a .spindle within said magazine, means holding said spindle to said cover, a normally .contracted coiled spring loosely surrounding said .spindle but .having its frontend anchored to the frontpart of said spindle, a staple pusher within and slidably guided bysaid magazine and shiftable relative to said spindle and having means retaining the rear loose .end of-saidicoilcd spring for extending .the latter pursuant to reception of said -strip .of staples Vwithin said magazine and upon closing `ofsaid magazine by .said cover to urge said strip towards :said guideway, spring means secured .to said magazine, said-.spring means and cover yhaving cooperative disengageable means vto prevent longitudinal displacement of said cover relative .to said magazine, andnormally'raised spring driving meansabove said cover vand securedat .the rear part-of the latter vfor ejecting 'the foremost staple of said lstrip out of said guideway.

.2. In a :stapling machine, a magazine for yhousing a strip yof staples .and having'a guideway, a cover .for .said magazine including -a depending .portion having an opening,.saidcoverandmagazine includingmeans for slidably guiding said cover .to .open or .close .said magazine, a spindle Within said magazine vhaving :at its rear -end 'a hookfor interlocking Awith walls of said opening, a `normally contracted coiled spring loosely Vsurrounding said spindle `but :having its frontend :anchored to the front part t.ofzsaid spindle, a :staple'pusher within and slidably guided :by 'said magazine Aand shiftable relative to said spindle and having meansstraddled by .the :rear loose end of said coiled spring for extending the latter kpursuant to reception'of said strip of staples Within lsa'idmagazine and uponclosing of said magazine Yby said cover to yurge said strip towards said guideway, spring .means secured to :saidtmagazine and 4having `means cooperating with said depending :portion to prevent :longitudinal :displacement of .the latter :relative to Ysaid magazine, zand a one piece normally elevated .resilient .driver including a'shank above and extending longitudinally yofsaid cover and including a rear portion secured thereto vand Vincluding a depending blade for ejecting the foremost staple of said -strip out of .said guideway.

AIn a .stapling machine, a magazine for housing a strip vof staples and 'having a guideway, .a cover for lsaid magazine, said cover and magazine including means for slidablyfguiding said :cover to open lor close said .magazine, a spindle within said magazine, means detachably holding said spindle ato said fcover, .a normally contracted coiled spring .loosely surrounding said spindle but having its .front end anchored .to the front part of Asaid spindle, a staple pusher within and slidably guided by said magazine and .shiftable relative to said spindle and having means straddled by the rear loose end of said coiled spring for extending the -latter pursuant to yreception of .said strip of staples -within said magazine and upon closing of said magazine Vby .said cover 'to urge said Astrip towards'said/guideway, spring means secured to said magazine, said spring means :and =eover having disengageable means to :prevent 'longitudinal displacement 'of said cover relative ito :said magazine, :la casing mounted over said cover and having sides straddling Asaid magazine, .a one piece :normally elevated resilient idriver ihaving fa sloping shank above `and spaced from :said cover and Yertending longitudinally ythereof vand including a rear portion fan. chored to .said :cover and 'having a :depending blade for ejecting the foremoststapleof saidstrip outof said guideway, and means :securing .said casing to said cover.

4. vIn a .'stapling machine, 'a .magazine .for homing a strip 'of staples .and .having a guideway, a :cover for :said magazine, .said cover `and magazine including :means for slidably guiding lcover 'to open or close said .magazine, a spindle within 'said magazine, means holding said spindle .to said cover, anormally .contracted coiled spring loosely surrounding said spindle but having its :front end :anchored to .the `trout part of said spindle, a staple pusher within .and slidably yguided by said magazine :and shiftable relative "to :said Vspindle `and having .fmeans 'straddled by the lrear .loose end of said Icoiled .spring "for Ytert-- tending the `latter pursuant 'to reception of said strip of staples within said magazine and upon closing of said magazine by said vcover to Vurge .said strip towards said guideway, leaf spring means secured .to said magazine Vand having v*means lfor vreceiving .a ipart of said :cover `to prevent longitudinal displacement of the latter .relative to said magazine, a casing mounted lover and secured `to said cover including an opening at the rear end thereof, a one piece normally elevated Iresilient 'driver having :a shank spaced .from and extending longitudinally .of `said cover and including .a rear portion secured .to the latter and having a tongue extending from said rear portiomsaid driver having'a .dependingblade for lieiecting the foremost staple .of .said strip out 'of `said magazine, a :movable catch guided `by said tongue .and having means projecting through said opening and accessible .outside of vsaid opening 'and adapted to be manipulated for Ydelectfing said leaf spring :means to unlock said cover to permittdisplacement thereof .lengthwise .of said magazine.

5. The stapling machine in .accordance with claim 4 wherein .said :catch embodies spaced sides loosely .seated on the rear end of saidleaf spring means.

6. The :stapling machine according to clairn-4 'further characterized in that the .catch includes cam .shaped por tions .seated ou the terminal 'of vsaid leaf spring means;

7. The staplng machine vaccording to claim z6 wherein said cam shaped portions are spaced apart and are at the lower parts of said catch and ride upon said terminal on-closing Vof said .magazine b y said cover.

8. The stapling'machine according 'to claim 7 -wh'erein the spindle embodies a hook receivable in an opening 'in a depending block of the cover and adapted to interlock with said block.

9. The stapling 'machine in accordance with claim '8 gheein said catch also has .an :opening vfor receiving said l0. in a stapling machine, .a magazine for holding fa strip of staples and embodying at .its front end .fa staple guideway and .including upwardly extending spaced .sides having talined 'rectilinear slots, a cover between said sides and Ahaving means .projecting 'into said slots 'for slidably guiding said cover longitudinally of said image azine, a one piece resilient staple driver having an 1inclined shank labove and spaced 'from said coverand Ihaving a rear intermediate portion biased relative A'to vsaid shank and including a portion extending rearwardly of said intermediate `portion and permanently Vsecured lto the rear partof said cover, ablade for ejecting the foreimost staple of said strip out of said guideway and `forming a part .of and depending 'from the 'forward portion of said driver and including a gap, a head .extending from the front part of said cover and having :'a reduced portion projecting into said gap for slidably guiding said blade, aspindle within said magazine, means holding saidV spindle to said cover, .a normally contracted coiled spring loosely surrounding said spindle but having its front Aenil anchored Ato the front end of said spindle, .a .staple pusher within .and sli'dably guided by said magazine and shiftable relative to said spindle and having means straddled by the rear loose end of said coiled spring for extending strip of staples and embodying at its front end a stapley guideway and including upwardly extending spaced sides having alined rectilinear slots, a cover between said sides and having means projecting into said slots for slidably guiding said cover longitudinally of said magazine, a one piece resilient staple driver having an inclined shank above and spaced from said cover and having a rear intermediate portion biased relative to said shank and including a portion extending rearwardly of said intermediatel portion and permanently secured to the rear part of said cover, ya blade for ejecting the foremost staple of said strip out of said guideway and forming a part of and depending from the forward portion of said driver and including a gap, a head extending from the front part of said driver and having a reduced portion projecting into said gap for slidably guiding said blade, a spindle Within said t magazine, means holding said spindle to said cover, a normally contracted coiled spring loosely surrounding said spindle but having its front end anchored to theA front end of said spindle, a staple pusher within and slidably guided by said magazine and shiftable relative to said spindle and having means straddled by the rear loose end of said coiled spring for extending the latter pursuant to reception of said strip of staples within said magazine and upon closing of said magazine by said cover to urge said strip towards said guideway, locking means to prevent longitudinal displacement of said cover relative to said magazine in the closed relation of the latter, and supplementary locking means to prevent upward tilting of said cover in the closed relation of said magazine.

12. In a stapling machine, a magazine for holding a strip of staples and embodying at its front end a staple guideway and including upwardly extending spaced sides having alined rectilinear slots, a cover between said sides and having means projecting into said slots for slidably guiding said cover longitudinally of said magazine, a one piece resilient staple driver having an inclined shank above and spaced from said cover and having a rear intermediate portion biased relative to said shank and including a portion extending rearwardly of said intermediate portion and permanently secured to the rear part of said cover, a blade for ejecting the foremost staple of said strip out of said guideway and forming a part of and depending from the forward portion of said driver and including a gap, a head extending from the front part of said cover and having a reduced portion projecting into said gap for slidably guiding said blade, a spindle within said magazine, means holding said spindle to said cover, a normally contracted coiled spring loosely surrounding said spindle but having its front end anchored to the front end of said spindle, a staple pusher within and slidably guided by said magazine and shiftable relative to said spindle and having means straddled by the rear loose end of said coiled spring for extending the latter pursuant to reception of said strip of staples within said magazine and upon closing of said magazine by said cover to urge said strip towards said guideway, locking means to prevent longitudinal displacement of said cover relative to said magazine, said sides embodying reentrant means, and means extending from said cover adapted to be received by said reentrant means to preclude upward displacement of said cover relative to said magazine.

13. In a stapling machine, a magazine for holding a strip of staples and embodying at its front end a staple guideway and including upwardly extending spaced sides having alined rectilinear slots, a cover between said sides and having means projecting into said slots for slidably guiding said cover longitudinally of said magazine and including a depending block having a projection, a one piece resilient staple driver having an inclined shank above and spaced from said cover and having a rear intermediate portion biased relative to said shank and including a portion extending rearwardly of said intermediate portion and permanently secured to the rear part of said cover, a blade for ejecting the foremost staple of said strip out of said guideway and forming a part of and depending from the forward portion of said driver and including a gap, a head extending from the front part of said cover and having a reduced portion projecting into said gap for slidably guiding said blade, a spindle within said magazine, means holding said spindle to said cover, a normally contracted coiled spring loosely surrounding said spindle but having its front end anchored to the front end of said spindle, a staple pusher within and slidably guided 4byl said magazine andshiftable relative to said,

spindle and having means straddled by the rear loose end of said coiled spring for extending the latter pursuant to reception of said strip of staples within said magazine and upon closing of said magazine by said cover to urge said strip towards said guideway, a sloping cantilever leai:` spring secured to said magazine'and including an opening for interlocking with said projection on complete closing of casing and to prevent -longitudinal displacement of the latter relative to the magazine.

14. The stapling machine according to claim 13 Vwherein a base is pivotally secured to said magazine and said leaf spring embodies a spring iinger for yieldingly holding said magazine spaced from said base.

l5.` In a stapling machine, a magazine for holding a strip of staples and embodying at its front end a staple guideway and including upwardly extending spaced sides having alined rectilinear slots, a cover between said sides and having means projecting into said slots for slidably guiding said cover longitudinally of said magazine, a one piece resilient staple driver having an inclined shank above and spaced from said cover and having a rear intermediate portion biased relative to said shank and including a portion extending rearwardly of said intermediate portion and permanently secured to the rear part of said cover, a blade for ejecting the foremost staple of said strip out of said guideway and forming a part of and depending from the forward portion of said driver and including a gap, and a head `extending from the front part of said cover and having a reduced portion projecting into said gap for slidably guiding said blade.

16. In a stapling machine, a magazine for holding a strip of staples and embodying at its frontend a staple guideway and including upwardly extending spaced sides having alined rectilinear slots, a cover between said sides and having means projecting into saidv slots for slidably guiding said cover longitudinally of said magazine, a one piece resilient staple driver having an inclined shank above and spaced from said cover and having a rear intermediate portion biased relative to said shank and including a portion extending rearwardly of said intermediate portion and permanently secured to the rear part of said cover, a blade for ejecting the foremost staple of said strip out of said guideway and forming a part of and depending from the forward portionof said driver and including a gap, a head extending from the front part of said cover and having a reduced portion projecting into said gap for slidably guiding said blade, a base hingedly connected to said sides, an anvil carried by said base, spring means for normally holding said magazine spaced from said base, and disconnectable means interlocking said base and magazine.

17. In a stapling machine, a magazine for holding a strip of staples and embodying at its front end a staple guideway and including upwardly extending spaced sides having alined rectilinear slots, a cover between said sides and having means projecting into said slots for slidably guiding said cover longitudinally of said magazine, a one piece resilient staple driver having an inclined shank above and spaced from said cover and having a rear intermediate portion biased relative to said shank and mcluding a portion extending rearwardly of said intermediate portion and permanently secured to the rear part of said cover, a blade for ejecting the foremost staple of said strip out of said guideway and forming a part of and depending from the forward portion of said driver and including a gap, a head extending from the front part of said cover and having a reduced portion projecting into said gap for slidably gliding said blade, driving means above and spaced from said cover, means securing the rear end of said driver to the rear end of said cover,

and a casing concealing said driving means and movably straddling said magazlne.

18. 'In a stapling machine, a staple magazine comprising a front wall, spaced sides integral with said wall and embodying inwardly turned anges spaced from said front wall but extending part way along the bottom portion of said magazine along the length of said sides, an anvil carrying base, 'a hinge pin carried at the rear parts of s aid sides and swingably sustaining said base, and a leaf sprlng having its front part secured to said anges and having its rear part extending beyond the latter and abutting said hinge pin and depressible downwardly relative to the rear parts of said sides.

19. The stapling machine according to claim 18 wherein said leaf spring constitutes acantilever embodyarcanes in; a' -downwardly and rearwardly extending terminal disposed under and normally resiliently urged upwardly against xsaid pin.

20. In combination, a spindle, a shiftable staple pusher having sides straddling a part of said spindle and including guard means to permit displacement of said pusher relative to said spindle, and a normally contracted lcoiled spring having .its front end `anchored to the -front end of said spindle and having its rear end interlocked with said Aguard means to provide for extension ofsaid spring rearwardly away from said front end in proportion to the displacement of .said pusher towards therear'end of said spindle.

21. -In combination, a spindle, a shiftable staple pusher having sides straddling a 'part of said .spindle and including inwardly turned guard means constituting an opening about said spindle to -permit displacement of said pusher relative to said spindle, and a normally contracted coiled .spring having its front end anchored to the front end `of said spindle and vhaving its rear end fastened to said guard means to provide for extension of said spring rearwardly away from said front end in proportion to the displacement of said pusher towards the rear end of said spindle.

y.22. In combination, ya magazine, a cover, ymeans movablyguiding said cover relative to said magazine, a spindie bodily movable with said cover Vrelative to said magazine, a -shiftable staple pusher within said magazine and having sides straddling :a part of said spindle and including guard means to provide for displacement of said pusher relative to said spindle, and a normally contracted coiled spring having its frontend anchored to the front end of said spindle and having rear parts locked with said guard means to provide for extension of Said spring rearwardly away from said front end in proportion to the displacement of said pusher towards the rear end of said spindle.

23. A stapling machine wherein a staple strip -is adapted to be housed in an open top magazine and between spaced side walls .of the latter :and wherein the bottom wall of said magazine embodies a Vguideway contiguous fto the Vhoot Wall of -said magazine, .and wherein a cover is Vsubstantially coextensive with the length of said magazine and disposed slightly above said :strip to prevent displacement of the latter away from said bottom wall, and wherein fsaid cover and :side walls include means for slidably yguiding said .cover longitudinally of said magazine to Vopen or close the latter; comprising, a spindle within said magazine and 'disposed below said cover, means holding the rear end of said spindle spaced from said bottom wall and to the rear part of said cover to permit bodily displacement of said spindle with said cover, a pusher movable relative to said spindle and supported by said bottom wall and guided between said side walls and having means slidably arranged on said spindle and supporting the latter to maintain said spindle spaced from said bottom wall, helicoidal spring means about said spindle and adapted to be stressed pursuant to insertion of said staple strip through said open top and in to said magazine between said pusher and said front wall and during and after closing of said magazine by said cover for urging said strip towards said guideway, normally raised staple driving means above and spaced from said cover and having a rear portion anchored to the rear part of said cover and having at its front end a depending blade normally above the foremost staple of said strip and adapted to be shifted downwardly against said foremost staple to drive the latter through said guideway upon downward manipulation of said driving means towards asid cover in the fully closed relation of the latter, and locking means cooperating to detachably hold said cover in its fully closed position and against longitudinal displacement relative to said magazine.

24. The stapling machine according to claim 23 wherein a casing is secured to and conceals said driving means and includes depending spaced sides straddling the spaced side walls of said magazine.

25. The stapling machine according to claim 24 wherein said casing has a top wall secured to said driving means, said top wall serving as means to receive linger pressure thereon for depressing said driving means relative to said cover and magazine.

26. The stapling machine according to claim 25 characterized in that said top wall of said casing includes a slot, and a catch is movably seated on said downwardly '1"0 extending rear part of said leaf spring and vincludes means projecting loosely through said slot, and 'an accessible overhanging portion extending from the vupper part vof said catch vand spaced from said slot.

v2.7. "The stapling machine in accordance with claim 26 wherein said catch vembodies cam means seated on said downwardly 4extending rear part of :said `leaf spring'.

.28. The stapling machine according lto claim further characterized in that said vspaced side walls :ofthe magazine include aligned slots, and `said cover embodies spaced :lugs slidably guided by the walls of said slots, said side walls including at their rear ends aligned notches, and `said cover having means at its rear end removably receivable in said notches to preclude tilting of :said cover relative to said magazine.

29. The stapling machine according to claim 23 wherein said spring means is normally compressed and closely surrounds said spindle and has .its frontend anchored to the frontend of said :spindle and vhas `its Arear end retained by said means vslidably arranged on said spindle.

30. A stapling machine wherein a staple strip is adapted to `be housed in an open top magazine and `between spaced side ywalls of the latter :and wherein 4the bottomwall of said magazine embodies a guideway contiguous to the front wall of said magazine, and wherein a cover :is substantially coextensive with the length of said magazine and disposed .slightly above Vsaid staple strip to prevent displacement of the latter away from said bottom wall, and wherein .said cover and side walls include means for slidably guiding :said cover 'longitudinally of said magazine to open or close the latter; comprising, a spindle within safid magazine and disposed below said cover, means holding the Vrear end of lsaid spindle spaced from said bottom wall and to the rear part of said cover to permit bodily displacement of said spindle with said cover, a staple pusher movable relative to said spindle and supported by said zbottom wall .and guided :between said side walls .and having .means slidably arranged on said vspindle and supporting the latter to maintain said spindle spaced yfrom said bottom wall, helicoidal spring means about said spindle and adapted to be stressed pursuant to :insertion of said `staple strip through said open top and in to .said magazine between vsaid pusher and said front wall and during vand after closing of said magazine `by said .cover for urging `said strip towards said guideway, normally raised staple .driving means above and spaced from said cover and having a rear portion anchored :to .the :rear part of `said :cover and having at'its front end a depending `blade normally above the foremost staple of said strip and adapted to be shifted downwardly against said foremost staple to drive the latter through said guideway upon exertion of finger pressure downwardly on said driving means in a direction towards said cover in the fully closed relation of the latter, and locking means cooperating to detachably hold said cover in its fully closed position and against longitudinal displacement relative to said magazine, said locking means comprising a leaf spring having its front part secured to said bottom Wall and including a downwardly and rearwardly extending rear part overhanging said bottom wall and having an opening, and said rear part of said cover including depending meansfor removably interlocking with the wall of said opening.

3l. The stapling machine according to claim 30 Wherein the corresponding rear parts of said spaced side walls of said magazine carry a fulcrum pin resiliently and normally abutted by said downwardly extending rear part of said leaf spring.

32. The stapling machine according to claim 30 lrther characterized in that an anvil carrying base has corresponding rear portions pivotally mounted on said pin, and said leaf spring includes a downwardly extending inclined finger for normally maintaining said magazine spaced from said base.

33. The stapling machine according to claim 30 wherein a catch it movably seated on said downwardly extending rear part of said leaf spring and includes an overhanging extension to receive finger pressure thereon.

34. ln a stapling device, a body forming a staple feed chamber having a staple ejection slot adjacent one end thereof and an opening in one side for loading staples therein, a staple driving blade positioned to enter said slot, said blade being formed as a part of a closed V, means slidably mounting one leg on said body to open and close the loading opening therein, and the other leg serving as an actuator for said driving blade which closes the open end of the V.

35. In a stapling machine, a staple receiving magazine having an open top for loading a staple stack within said magazine and having means constituting Va staple ejection raceway, driving means comprising a sheet metal blade normally slightly above said stack for ejecting the foremostr staple thereof out of said raceway, a sheet metal actuating member having its upper part integrally merged with the upper part of said blade, a substantially rectilinear cover for said stack having its major part vertically spaced from said member and having its rear part united within the rear part ofy said member, said cover and magazine having means for linearly guiding said cover to open or close said open top, an extension projecting from the front end of said cover, said blade having a slot for receiving said extension to movably guide said blade towards or away from said raceway, the upper wall of said slot limiting downward displacement of said blade and the lower wall of said slot limiting upward displacement of said blade.

36. In a stapling machine, a staple receiving magazine having an open top for loading a staple stack withinV said magazine and having means constituting a staple ejection raceway, driving means comprising a sheet metal blade normally slightly above said stack for ejecting the foremost staple thereof out of said raceway, a sheet metal actuating member having its upper part integrally merged with the upper part of said blade and sloping downwardly and rearwardly away from said upper part, a substantially rectilinear cover for said stack having its major part vertically spaced from said member and having its rear part united with the rear part of said member, said cover and magazine having means for linearly guiding said cover to open or close said open top, an eXtension projecting from the front end of said cover, said blade having a slot for receiving said extension to movably guide said blade towards or away from said raceway, the upper Wall of said slot limiting downward displacement of said blade and the lower wall of said slot limiting upward displacement of said blade.

37. In a stapling device, a body forming a staple feed chamber having a staple ejection slot adjacent one end thereof and an opening in one side for loading staples therein, said body being formed of a single piece of metal, a staple driving blade positioned to enter said slot, said blade being formed as a part of a closed V, means slidably mounting one leg on said body to open and close the loading opening therein, and the other leg serving as an actuator for said driving blade which closes the open end ofthe V. Y

38. In a stapling, device, a body forming a staple feed chamber having a staple ejection slot adjacent oneend thereof and an opening in one sidewfor loading staples therein, said body being formed of a single piece of'metal and having a generally U-shaped crossl section, a staple driving blade positioned to enter said slot, said blade'being formed as a part of a closed V, means slidably mounting one leg on said body to open and close the loading opening therein, and the other leg serving as an actuator for said driving blade which closes the open end of the V.

39. In a stapling device, a body forming a staple feed chamber having a staple ejection slot adjacent one end thereof and an opening in one side for loading staples therein, said body being formed of a single piece ofV metal and having a generally U-shaped cross section, said one end of said body being closed to form a head plate,l a staple driving blade positioned to enter said slot, said blade being formed as a part of a closed V, means slidably mounting one leg on said body to open and close the loading opening therein, and the other leg serving as an actuator for said driving blade which closes the open end of the V. A A

40. In a stapling device, a body forming a staple feed chamber having a staple ejection slot adjacent one end thereof and an opening in one side for yloading staples therein, a staple driving blade positioned to enter said slot, said blade being formed as a part of a closed V, means slidably mounting one leg in opposed slotted means on said body to open and close the loading opening therein, and the other leg serving as an actuator for said driving blade which closes the ropen end of the V.

41. In a stapling device, a body forming a staple feed chamber having a staple ejection slot adjacent one end thereof and an opening in one side for loading staples therein, a staple driving blade positioned to enter said slot, said blade being formed as apart of a closed V, means slidably mounting one leg on said body to open and close the loading opening therein, and the other leg serving'as an actuator for said driving blade which closes the open end of the V, means forming an extension on said one leg, said blade having a slot to engage said extension to limit the opening motion of the legs of the V.

References Cited in the le of this patent UNITED STATES PATENTS

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