US2461165A

US2461165A - Magazine for fastener applying implements

Info

Publication number: US2461165A
Application number: US585486A
Authority: US
Inventors: Charles M Lindstrom
Original assignee: Bostitch Inc
Current assignee: Bostitch Inc
Priority date: 1945-03-29
Filing date: 1945-03-29
Publication date: 1949-02-08
Anticipated expiration: 1966-02-08

Description

c. M. LINDSTROM 2,461,165

Feb. 8, 1949.

MAGAZINE FOR FASTENER APFLYING lMPLEMENTS 4 Sheets-Sheet 1 Filed March 29, 1945 Z7 ueuor:

C/zaZeSMZ/indsmm Feb- 8, 1949 c. M. LINDsTRoM 2,461,155

MAGAZINE FOR FASTENER APPLYING IMPLEMENTS Filed March 29, 1945 4 Sheets-Sheet 2 Feb. 8, 1949. C, M, |ND5TROM 2,461,165

MAGAZINE FOR FASTENER APPLYING IMPLEMENTS Filed March 29, 1945 4 Sheets-Sheet 3 297 -Q/Ql Feb. 8, 1949. C, M, |ND5TROM 2,461,165

MAGAZINE FOR FASTENBR APPLYING IMPLEMENTS Q7 A ma@ /lbmgns Patented Feb. 8, 1949 MAGAZINE FOR FAB IMPL TENER APPLYING EMEN'IS Charles M. Lindstrom, East Greenwich. B. I., al-

signor, by menne assignments. to Boetlteh. Inc.. a corporation o! Rhode Island Anuman Mmm ze, 194s. sum N. man 14 claim.. w1. 144s) The present invention relates to improvements in fastener-applying implements and more particularly to implements oi the plier-type adapted to be held and operated by one hand.

One object of the present invention is to provide an implement o! the type indicated having more convenient means for loading it with fastenera auch as U-shaped staples.

Another object is to provide in an implement of the type indicated improved means for withdrawing the fastener-feeding means or staplepusher to permit loading the magazine with staples.

Another object is to provide in an implement of the type indicated means normally positioned to hold the staples in place in the staple-magazine and adapted to he withdrawn longitudinally thereof to permit the staples to be entered into the Another object is to provide an implement of the type indicated having s. slidable cover on the staple-magazine for normally retaining the staples in place therein and adapted to be withdrawn to open the magazine for receiving the staples and operative automatically to retract the staplepusher.

Another object is to provide improved fastenerfeeding and driving means for preventing the driving of a second fastener before the first one has been discharged from the implement.

Further objects of the improvement are set forth in the following specicatlon which describes a preferred embodiment of the invention e with one modiiled form thereof as illustrated by the accompanying drawings. In the drawings:

Fig. l is a side view of the complete implement shown as of the plier-type;

Fig. 2 is a longitudinal sectional view of the same showing the operating parts thereof;

Fig. 3 is a side view of the implement shown with the parts in position at the completion of driving and clinching a staple;

Fig. 4 is a plan view of the implement with the staple-applying arm shown in transverse section to illustrate the parts enclosed therein:

Fig'. 5 is a longitudinal sectional view of the implement shown with the magazine-cover withdrawn and the pusher retracted and representing a stick or refill of staples as being inserted into the magazine:

Fig. 6 is a plan view of the complete implement illustrating the opening in the staple-applying arm for permitting staples to be inserted therethrough into the magazine;

Fig. 'lis a detailed plan view oi' the implement 1with the staple-applying arm shown in transverse section;

Fig. 8 is an enlarged longitudinal sectional view of the forepart of the implement:

Fig. 9 is an enlarged front view of the same with certain of the parts shown in transverse section:

Fig. 10 is an enlarged view of the forepart of the implement showing the staple-driving means in position after a staple has been fed from the magazine;

Fig. 1l is a transverse sectional front view of the same:

Fig. 12 is a view similar to Fig. 10 showing the staple-applying means at the completion of driving and clinching a staple in the work;

Fig. 13 is a transverse sectional front view of the same: and

Fig. 14 is a side elevational view of the implement shown with a modified form of clinching 'means for stapllng or tacking trouser-omis to the trouser-legs.

The present implement is generally similar to that illustrated and described in my United States Letters Patent No. 2,354,760, dated August l, 1944, and the invention consists particularly in improvements therein. In general. the implement comprises a magazine 2 in the form of a troughshaped arm. a fastener-applying arm 3 pivoted to the magazine-arm in overlying relation thereto. a clinching arm l at the opposite side of the magazine-arm from the fastener-applying arm, and a manually-operable force-multiplying lever 5 connected to actuate the clincher-arm.

The magazine 2 is of channel shape in crosssection comprising a bottom wall B and parallel side walls 9 extending upwardly therefrom. The forward ends of the side walls 9 of the magazine project beyond its bottom wall 8 and are folded inwardly in flange-like portions lll, see Fig. 4. At the forward end of the magazine 2 the side walls 9 are extended upwardly in wing-like portions l2 formed with outwardly-projecting ears I3 bent at right-angles to provide abutments employed for a purpose explained later. Mounted within the magazine-arm 2 and extending longitudinally thereof is a staple-support or core l5 across which U-shaped staples are adapted to be straddled and to feed therealong for delivery to the applying means. The staple-core l5 is of U- shape or channel form in cross-section having a horizontal bottom wall IB and vertical side walls Il, see Fig. 9, with flanges IB, see Fig. 4, at the top of the side walls folded inwardly toward each other. In the present form of construction of the implement the side flanges Il are relatively narrow throughout the greater portion oi' the length of the core Il, but adjacent the forward end they are extended to meet substantially at the center, see Figs. 8 and 9, in rectangularlyshaped portions or tabs 2li. These meeting portions or tabs 20 are inclined upwardly toward the center of the core to provide a beveled rest for staples s having crowned heads or crossbars. In other cases the rest formed by the tab portions 2li may take diiierent shapes either ilat for ordinary U-shaped staples or with a curved contour for other forms of crowned staples.

The forward end of the core il is spaced a slight distance rearwardly of the inwardlyfolded flanges i at the front of the magazinearm 2 to provide vertical guideways or grooves 2| adapted to recieve a slidable staple-driver 2l to be described later. Overlying the top of the core il at its forward end in spaced relation to the tabs is a substantially U-shaped guard-member 22 having its sides welded or otherwise suitably secured to the upstanding wing-like portions I2 on the sides 9 of the magazine-arm 2. The forward edges of the sides of the member 22 are spaced rearwardly from the flanges III on the arm 2 to form a continuation of the grooves 2i for slidably mountingr the staple-driver 28. The bottom transverse portion 2l of the guard member 22 is crowned or shaped to correspond with that of the tabs 20 to conform to the crowned crossbars of the staples as they rest on the tabs.

Referring particularly to the enlarged views. Figs. 8 to 13, inclusive, it is to be noted that the staple-rest comprising the tabs 20 is offset rearwardly from the forward edges of the side walls Il of the core I5 to form relatively narrow shoulders 24 disposed below the rest and at the rear of the grooves 2i. These shoulders 2l serve as detents or auxiliary rests for supporting each staple as it is fed ofi' from the forward end of the core Il, see Fig, 12, it being noted by reference to Fig. 8 that the transverse portion 23 of the guard 22 is cut back to provide an open space above the shoulders 2l. Above the shoulders 24 the sides ll of the arm 2 are sheared to form extruded portions or lugs 3i which project inwardly therefrom for a purpose explained hereinafter.

The staple-driver 25 is in the form of a hardened metal blade of varying thickness from top to bottom and provided with relatively narrow guiding fins or runners 2B adapted to slide in the grooves 2| at the forward end of the magazinearm 2. The blade of the driver 26 tapers in thickness from the top toward the bottom throughout its central portion and then is recessed rearwardly at its lower end. The lower recessed end of the driver 25 is thus formed with an oiset shoulder 2B raised slightly above its forward edge. Near this end of the driver 25 is a. circular hole 2l for connecting it with the staple-applying arm 3. On its rearward face the upper portion of the driver 25 is thickened to provide a substantially rectangular pad or projection 29 having its lower edge in the form oi a horizontal shoulder 30 which overhangs the datent-shoulders 24 at the forward end of the core Il. The lower edge of the pad 2B, thatis the shoulder 30 formed thereby, is straight across the width of the driver, the purpose of this form of construction being explained hereinafter.

As before indicated, the staple-driver 2Iis yconnected to be reciprocated by the am l, this connection comprising a stud 3l fastened in theforward end of the arm 3 and having its projecting portion engaging through the hole 2l near the lower end of the driver. 'me staple-applying arm I is of inverted channel shape in cross-section with its side walls I4 tapering slightly toward its rearward end which is formed with semicircular ears 2l pivotally connected to the sides of the magasine-arm2bymeansofaorosspin I,see Figs. 1 and 7. Substantially midway of its length the arm l is widened transversely by offset por tions Il of its side walls Il while the forepart of the arm narrows again in conformity with its rearward portion. Along its rearward portion the side walls 24 of the arm I are Joined together by a top wall Il, but forwardly thereof throughout its widened and front portions the top wall is cut away with an extended opening Il to provide a window or doorway for inserting staples therethrough into the magasine-arm 2. Adiacent the forward end of the arm I its side walls are staked or punched to force the metal inwardly in a pair of substantially arcuate portions which form abutments 4I, see Fig. 7, adapted to be engaged by the lower edges of the ears or lugs il which project from the sides-of the arm 2, whereof to linut the upward movement of said arm 3 with respect to the arm 2 as indicated in Fig. 5. Buit ably secured to the inner faces of the widened portions of the sides Il of the arm l, as by welding or riveting, are a pair of studs having reduced central portions bounded by flanges as shown most clearly in Fig. 4. The studs Il are engaged by the ends of the manually-operative lever l in a manner as later explained.

The clinching arm 4 is generally of channel shape in cross-section having its forward longitudinally-tapered portion oifset below its main rearward portion, the sides of the latter being of greater depth. At its rearward end the sides of the arm I overlap the sides of the magazine-arm 2 and are provided with holes for receiving the cross-pin $8, previously mentioned, to pivotaily connect the arm 4 to the

arms

2 and 3. Positioned within the forward end of the arm I and welded or otherwise suitably secured to the walls thereof is a handened block l1 formed with clincher-grooves I8 of usual construction. see Figs. ll and i3, which are in substantial alinement with the lower edge of the staple-driver 2l.

The manually-operative lever 5 is of channel shape in cross-section with its rearward portion formed with a rounded bottom wall providing a hand-grip and its forward side walls 49 extended upwardly at an angle to adapt them to straddle the sides of the clincher-arm I. A crosspin 50 projects through holes in the sides of the arm l and the side walls 'of the lever 5 for pivotally mounting the latter on the arm. 'I'he upper ends of the sid-e walls Il terminate in hooks El adapted to engage around the studs l! which project inwardly from the walls of the stapleapplying arm 3, see Figs. 4 and 5, whereby to connect the lever l for rocking said arm downwardly to reciprocate the driver 2l across the end of the magazine-arm 2. Rearwardly of the hook portions 5i of the lever l the sides 49 are formed with cam-faces I2 which operate on the studs I! with an increased pressure or mechanical advantage, see Fig. 3, during the completion of driving and clinching the staples. That is to say, during the last end of the movement of the staple-driver toward the arm I the .force of the lever l is multiplied to increase the clinching action as the less of the staple are bent around and clinched on the under side oi' the work in the manner shown in Fig. 13. The clinching arm l is normally maintained in spaced relation amines to the magazine-arm 2 and the staple-applying arm 3 through the means of a leaf-spring 56 of slightly bowed shape, shown best in Fig. 2. The rearward end of the spring 55 bears on the under side ofthe magazine-ann 2 and its forward end engages under the crosspin 50 while its central bowed portion bears against the bottom wall of the arm l. A tongue 56 formed by the portion of the metal slit from the end of the spring 55 is bent upwardly and curved around the top of the pin 5B to connect this end of the spring therewith.

Referring particularly to Fig. 2 ofthe drawings, the staples s are held from rising up on the core l5 by means of a. cover member 56 which overlies their crossbars and is slidable longitudinally of the magazine 2 to adapt it to open it for receiving the staples inserted through the window or door 40 in the top of the staple-applying arm 3. The cover 5U m-ay be crowned along its central portion to adapt it to conform to the shape of conventionally-crowned staples and at its rearward end it is bent downwardly to form a tail- .plece 6i adapted to be gripped in the fingers to draw the cover rearwardly along the top of the magazine Vt. The cover 50 is formed with a relatively narrow slot 52 extending substantially its whole length as shown in Fig. 6 and intended for a purpose explained hereinafter. The cover Gil is maintained in position overlying the upper edges of the sides 9 of the magazine-arm 2 by means of a leaf-spring 63 bearing against the top wall of the staple-applying arm 3. As shown in Fig. 2 the rearward end of the spring 63 bears against the under side of the top wall 38 of the arm 3, its middle bowed portion bears against the top of the cover 60, and its forward end is fastened to the top wall 38 by a lug 6l of the metal slitted therefrom and bent downwardly to project through a hole B5 in the spring. The spring 53 is slitted longitudinally at its center throughout the greater portion of its length, the purpose of this construction being explained later hereinafter.

The staples s are advanced along the core I5 in the magazine-ann 2 by means of a staplepusher B6 of usual construction adapted to overlie and straddie the core. Referring to Figs. 2, 4 and 5. the staple-pusher B6 is constructed of sheet-metal with a top wall 61 and downwardlybent flanges or side walls 68. The side walls 58 extend forwardly beyond the forward end of the top wall 51 which'is bent downwardly with a portion 69 therebetween as shown most clearly in Figs. 2 and 5. The forward edges of the side walls 68 are adapted to engage the legs of the rearmost staple in the magazine 2 to slide the whole series forward on the core I5. The staplepusher $6 is slid forwardly along the core i5 under the tension of a helical spring 10, the forward end of which bears against the bent down portion 69 of the top wall 51. The rearward end of the spring 10 encloses a hollow stud 1i and bears against its flanged end 12 to press it against the crosspin 36 which pivotally connects the arms 2. 3 and 4. Referring to Fig. 4 o f the drawings, it will be noted that the central portion of the nin is reduced in diameter to form shoulders 13 which engage with the flange 12 on the stud 1| whereby the stud retains the pin against axial movement. The staple-pusher GB is adapted to be withdrawn against the tension of the spring 1li by the retraction of the cover Gil along the top of the magazine-arm 2. For this purpose the stenumusher i: provided with an upstanding lug or linger 15 formed from a portion of the metal sheared from its top wall 61 and bent upwardly as shown most clearly in Figs. 5 and '1. 'Ihe finger 15 is adapted to be engaged by the end of the slot B2 in the cover member 50 whereby the pusher may be drawn into the position shown in Fig. 5 with its rearward end engaging the crosspin 36 to limit its movement in'this direction.

Referring to Fig. 4, it will be noted that the tailpiece or finger-grip Si at the rearward end of the cover 5B is narrowed to form a pair of shoulders 15 at either side of its main portion which are beveled on their under sides, see Fig. 5. These beveled shoulders 16 are adapted to engage with the inclined ends of detent notches 11 at the ends 9 of the magazine-arm 2 and thus tend to hold the cover in its forward position witnits end abutting the U-shaped guard member 22. The more important function of the shoulders 15 and notches 'I1 is to raise the rearward end of the cover 60 as it is withdrawn. As the cover 60 is drawn rearwardly along the top of the arm 2 the beveled shoulders 16 will ride up out of the detent notches 11 to raise the rearward end of the cover and thereby increase the force of the spring G3 which holds it down. Consequently. the forward end of the cover will be pressed down as shown in Fig. 5 with a considerable pressure causing it to frictionally grip or bind against the edges of the side walls 9 of the arm 2 to resist the pressure oi the spring 'lil when it has been contracted by the retraction of the pusher 6G. Stated another way, the friction exerted between the forward end of the cover against the arm 2 by the spring 63 will retain the cover and the pusher in retracted position against the increased tension of the spring 10 so that a stick or refill of staples, indicated at S in Fig. 5, may be inserted into the magazine 2 through the opening 40 in the staple-applying arm 3. Referring to Fig. 5, it will be observed that the purpose of the slit in the spring 63 is to permit the finger or lug 15 to slide back therethrough when the pusher B6 is slid into its rearward position illustrated in Fig. 5.

After the pusher 6B has been retracted in the manner explained above and the stick S of staples has been inserted through the opening 40 inthe arm 3. as indicated in Fig. 5, and placed in position with the legs of the staples straddling the core i5, the cover 6B is slid forwardly on the magazine 2 into the position illustrated in Fig. 2 where its forward end brings up against the guard member 22. The cover 60 will thus serve to hold the staples from riding up on the core I5 and the implement is ready for operation. To apply a staple to the work the implement is grasped with the palm of the hand overlying the staple-applying arm 3 and the fingers pressing against the rounded under side of the operating lever 5. 'I'hen by applying pressure to the lever 5 its hooked connection with the studs 45 on the arm 3 will act to swing the latter and the clincher-arm l toward each other. During this relative movement between the arm 3 and arm I the leaf-spring 55 is compressed. but the spring 63 will resist relative movement between the arm 3 and the magazinearm 2. When, however, the forward end of the magazine-arm is brought into contact with the work W, indicated in Fig. 12, the arm 3 will continue its motion to compress the spring 63. The motion of the arm 3 relative to the magazine-arm 2 will cause the staple-driver 25 to be slid downwardly in the grooves 2i at the forward end of of the side walls themagazinegarm. LWhen the magazine is ilrst supplied with staples s, that is unless staples already remain therein, the first action oi' the staple-driver 26 will be to separate a staple s from the stick S and carry it down onto the detent-shoulders 24. That is to say, as the driver 28 descends the shoulder 30 on its rearward face will engage the crossbar of the foremost staple s in the series on the core I5, see Figs. 10 and 12, to shear this staple from the strip and carry it down onto the detent-shoulders 24. During this action of the driver its edge or shoulder 30 will compress the crowned top of the staple s to straighten it. thereby causing its opposite legs to be spread apart as shown at :c in Fig. 13. This compression of the top of the staple will act to spread its legs against the inner faces of the sides t of the arm 2 directly beneath the inwardlyprojecting lugs Il so that the lugs will prevent the staple from rising to any extent above the detent-shoulders 24.

The staple separated from the strip and moved into reserve position resting on the shoulders 24 beneath the lugs 3| thus will be retained in this positionruntil the driver 25 is raised again by release of' the pressure on the lever 5. As the rearward edge 2B of the driver 25 rises above the shoulders 24, see Figs. 10 and l1, the staple s resting on the shoulders 24 will be pushed o!! therefrom by the legs of the next succeeding staple on the core I as the whole series of staples is advanced by the pusher i6. At the next descent of the staple-driver 25, as the implement is again operated, the driver will engage the top of the staple s advanced into position beneath its edge 28 to force it down in the grooves 2i and drive it through the work as its legs are bent inwardly by the curved clinched-grooves 83 and clinched on the under side of the work, see Figs. 12 and 13. The purpose of this form of construction and arrangement oi' the parts is the same as that shown and described in a prior copending application, Serial No. 563,499, filed by Arthur H. Maynard November 15, 1944, issued on May 20, 1947, as U. S. Letters Patent No. 2,420,830, the present invention embodying simplification and improvement thereover. The object of this arrangement is to prevent a second staple being driven before the nrst one has been discharged from the machine or, in other words, to avoid driving one staple on top of another which would be liable to clog the machine. It will be observed that if the driver 25 should be depressed insuillciently to complete the driving and clinching of a staple, a second staple could not be entered into the grooves beneath the driver until the latter has completed the application of the first staple, that is, the staple being driven and remaining in the grooves beneath the driver will prevent another staple being fed oil' from the detent-shoulders 24.

The implement may be operated continuously in the manner explained above to apply staples to the work in multiple and usually a fresh supply is inserted in the magazine before all the staples have been exhausted therefrom; the opening 40 in the arm 3 and the slot 62 in the cover B0 permitting inspection by the operator to reveal the number of staples remaining in the magazine at any tLme, see Figs. 2 and 4.

Fig. i4 of the drawings illustrates the present implement as having a modified form of clinching means to adapt it ior clinching the legs of staples in stitching or tacking the cuffs of trousers to the legs thereof. In this modified form oi' construction the clincher-arm 8l) is of slightlyV diimanner as portions o! Aof the staple through the outer cuil-layer.

ferent -iorm without a cylindebblock at its forward end. The ciinching means comprises an auxiliary arm 8l pivoted at its rearward end to the erosspin 50 and having its forward end bent upwardly and rearwardly in an overlying portion 82 formed on the top with clinchergrooves 0I. A leaf-spring I4 having its rearward end bearing against the under side oi' the magazine-arm 2 has its forward end bifurcated to underlie shoulders l5 at the sides of the arm Bl. The spring 84 has a linger 86 sheared from its main portion and bent downwardly with its end curved to underlie the semicircular end portion of the arm 8| which engages around the under side o! the pin 50. The spring 84 thus acts to hold the arm 8| in pivotal connection with the main arm 80 while also tending to elevate the outer end of the arm BI as shown by full lines in Fig. 14. The clinching means last described operate in substantially the same manner as explained in my prior patent, No. 2,354,760, re ferred to above, to adapt the inwardly-extending portion B2 of the arm 8i to be inserted between the folds of the cuir and trouser leg so that the staple may be inserted and clinched without its legs projecting through the outer layer of the cloth.

The last-described modified form of the implement is operated in substantially the same that described above except that the clinching means acts to clinch the legs of a staple in a blind stitch so that they will not protrude from certain of the laminations of the work, such as for attaching the cuif to the leg trousers without projecting the legs 1 It will'be observed from the foregoing specification that the present invention provides an extremely simple and compact form of implement 40 oi' the plier-type for applying fasteners while operating it in one hand. The structure and arrangement of the parts of the implement are considerably simplified and improved over previously used devices of the same type to render the implement .more economical to manufacture without loss oi' eiliciency in its operation. Moreover. the improved implement provides for more convenient loading of the magazine with fasteners or staples; the cover member being adapted to be withdrawn to open the magazine while at the same time acting to retract the staple pusher. In other words, the cover is operated for both functions of opening the magazine and retracting the pusher and the latter is held in retracted position without requiring any particular manipulation of the parts.

It is to be understood that while the present improvements are shown as applied to a pliertype of stapling implement they may be adapted for fastener-applying devices oi other types and therefore the invention is not limited in respect to its particular use as herein shown. Likewise, various modiilcations may be made in the structure and arrangement of the parts of the imple ment without departing from the spirit or scope of the invention. Therefore, without limiting myself in this respect, I claim:

1. In a fastener-applying implement, a magazine for supporting a supply of fasteners, a cover overlying the magazine for preventing displacement of the fasteners supported thereby, said cover being manually slidable longitudinally of the magazine to provide for loading it with fasteners. and resilient means acting against the QD of the cover for holding the cover in place on the magazine and applying frictlonal resistance to its sliding movement.

2. In a fastener-applying implement, a channel-shaped magazine for containing a supply of fasteners, a cover overlying the magazine for retainingrthe fasteners therein and slidable longitudinally thereof to open the/magazine, and resilient means bearing against the cover for holding the cover against the magazine and applying frictional resistance to its sliding movement to retain it in position with the magazine open or closed.

3. In a fastener-applying implement, a channel-shaped magazine having a bottom and upstanding sides, a cover overlying the top of the sides of the magazine and slidable longitudinally thereof, a spring bearing against the cover to press it against the sides of the magazine and apply frictional resistance to its sliding movement thereon, and means for supporting the spring above the cover.

4. In a fastener-applying implement, a magazine iorsupporting a supply of fasteners, an arm extending above the magazine, a cover underlying the arm and overlying the magazine to prevent disp'lacement of the fasteners supported thereby, "said cover being slidable longitudinally of the magazine to provide for loading it with fasteners, and a spring acting between the arm and cover to maintain the cover in position on the magazine and apply frictional resistance to its sliding movement.

5. In a fastener-applying implement, a hollow magazine for supporting a supply of fasteners. an arm hinged to the end of the magazine and extending longitudinally thereabove, said arm having a longitudinally-extending opening in its top, a cover overlying the top of the magazine to prevent displacement of the fasteners therein. said cover being slidable longitudinally of the magazine to open it for receiving a supply of fasteners inserted through the opening in the top of the arm, and resilient means for maintaining the cover in either open or closed position on the magazine.

6. In a fastener-applying implement, a hollow magazine for supporting a supply of fasteners, an arm pivoted to the end of the magazine and extending longitudinally thereabove, said arm having an opening in its top, a cover underlying the arm and overlying the magazine for preventing displacement of the fasteners therein, and a spring between the arm and cover for maintaining the latter in place on the magazine and frictionally resisting its movement longitudinally thereof, said cover being slidable rearwardly on the magazine to open it for receiving a supply of fasteners entered through the opening in the arm.

7. In a fastener-applying implement, a channel-shaped magazine having upstandng sides, an arm of inverted channel vshape having its sides pivoted to the sides of the magazine at one end thereof. a cover overlying the sides of the magazine and slidable longitudinally thereof between the sides of the arm, and a spring tensioned between the arm and cover for maintaining the latter in position on the magazine and frictionally resisting its sliding movement longitudinally thereof.

8. In a fastener-applying implement, a magazine for supporting a supply of fasteners. a cover overlying the top of the magazine to retain the fasteners in position and prevent their displacement, said cover being slidable longitudinally of the magazine to open it for receiving a supply of fasteners, resilient means for pressing the cover down on the magazine and frictlonally resisting its ,sliding movement, longitudinally thereof, a pusher inthe magazine for feeding the fasteners forwardly therein, a spring for advancing the pusher, and means onV the pusher engageable by the cover to retract the pusher when the cover is slid to open the magazine.

9. In a fastener-applying implement, a channel-shaped magazine for containing a supply of fasteners, an arm of inverted channel shape pivoted to the rearward end of the magazine with its sides overlying the sides thereof, a pusher slidable in the magazine for feeding the fasteners forwardly, a spring for advancing the pusher in the magazine. a cover overlying the top of the magazine to retain the fasteners therein, a spring within the arm acting against the cover to hold it down on the magazine and frictionally resist lts sliding movement longitudinally thereof, said cover having a slot extending longitudinally thereof, and means on the pusher projecting through the slot in the cover and adapted to be engaged by the end of said slot to cause the pusher to be retracted when the cover is slid to open the magazine.

10. In a fastener-applying implement, a channel-shaped magazine for containing a supply of fasteners, an arm of inverted channel shape pivoted to one end of the magazine with its sides overlapping the sides thereof. a cover enclosed within the sides of the arm overlying the top of the magazine, a spring within the arm acting against the top of the cover to hold it in place in the magazine and resist its sliding movement thereon, and cam-faces between the cover and magazine adapted to lift the rearward end of the cover when it ls slid longitudinally to open the magazine whereby to cause the spring to apply frictional resistance to the forward movement of the cover after it has been withdrawn to open the magazine.

il. In a fastener-applying implement, a channel-shaped magazine for containing a supply of fasteners, a cover overlying the top of the magazine to prevent displacement of the fasteners therein and slidably longitudinally thereof to open the magazine, resilient means for holding the cover pressed against the top of the magazine. notches having inclined edges at the sides of the magazine. and beveled shoulders on the cover adapted to ride up the edges of the notches in the sides of the magazine when the cover is withdrawn rearwardly thereof.

12. In a fastener-applying implement, a hollow magazine for supporting a supply of fasteners. and a lever movable relatively of the magazine and having a rectangular opening in its top wall extending longitudinally thereof and of substantial length through which the fasteners may be supplied to the magazine.

13. In a fastener-applying implement. a hollow magazine for supporting a supply of fasteners, and an arm hinged to the end of the magazine and extending longitudinally thereabove, said arm having a longitudinally extending opening of substantial length in its top to provide for loading the magazine with fasteners.

14. In a fastener-applying implement, a hollow magazine for holding a supply of fasteners, said magazine having a throat at one end through which the fasteners are driven, a pusher ln the magazine for advancing the staples to the throat. and a lever hinged to the end of the magazine 11 l2 and provided with n. rectangular opening in its t0n Number Name Date wm extending throughout substantially one-hal! 1,621,498 Cromos Mar. 22, 1927 the length thereo! through which the fasteners 2,288,500 Vogel 1 June 30, 1942 may be supplied to the magazine. 2,304,293 Wille Dec. 8, 1942 CHARLES M. IJNDBTROM 5 2,309,778 Maynard Feb. 2, 1943 v 2,309,779 Maynard Feb. 2, 1943 REFERENCES CITED 2,311,412 Pnkonm Femm, 194s The following references are of record in the 2343303 Pankonm Feb- 29 1944 me of this patent; lo 'gg332 Ruskin MBI- 14. 1944 8,317 Crosby Sept. 19. 1944 UNITED STTEB PATENTS 2,381,192 Vancora Aug.7, 1945 Number Name Date 823,123 Inman June 12, 1908