US2769173A - Staple magazine and feed means for stapling machines - Google Patents

Description

Nov. 6, 1956 c. M. LINDSTROM STAPLE MAGAZINE AND FEED MEANS FOR STAPLING MACHINES 3 Sheets-Sheet 1 Filed May 27, 1955 Arrows.

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Nov, 6, 1956 c. M. LINDSTROM 7 2,769,173

STAPLE MAGAZINE AND FEED MEANS FOR STAPLING MACHINES Filed May 27, 1955 3 Sheets-Sheet 5 IN V EN TOR. C'lzzzrlesMLz'ndslram wig;

A T T OR/VEYJ STAPLE MAGAZINE AND FEED MEANS FOR STAPLING MACHINES Charles M. Lindstrom, Westerly, R. I., assignor to Bostitch, Inc., Stonington, Conn., a corporation of Rhode Island Application May 27,1955, Serial No. 511,650 12 Claims. (Cl. 149) This invention relates to improvements in fastenerapplying implements and more particularly to hammertackers, so-called, for. use in driving staples, doublepointed tacks, and similar fasteners to attach labels, tags and the like to shipping cases, fasten carpets to floors and upholstery to furniture, nail roofing and siding to buildings, and for many other purposes.

One object of the invention is to provide an implement of the type indicated of strong and rugged construction, economical to manufacture, convenient to use, and especially efficient in performing its intended functions.

Another object is to provide an implementof the type indicated having. a hollow magazinefor containing a supply of fasteners with means for loading staples of the like into the under side of the magazine.

Another object is to provide an implement of the type indicated having a retractible staple-corewhich may he slid into the magazine to support a full supply of staples in straddled relationship thereon. 7

Another object is to provide an implement of the type indicated in which the retractible core may be used to withdraw the staple-pusher therewith for opening the under side of the magazine to load it. 7

Another object is to provide an'implement'of the type indicated having a cover slidable on the magazine to open it and attached to the core for retracting it. Y

Another object is to provide in an instrument of th type indicated automatically-operated latching means for retaining the cover in its forward closed position with the core in operative relation to the driving mechanism of the device.

Further objects of the improvement are set forth in the following specification which describes a preferred form of construction of the implement, by way of example, as illustrated by the accompanying drawings.

In the drawings:

Fig. 1 is a side elevational view of a fastener-applying implement embodying the improvements of the presen invention;

Fig. 2 is a longitudinal sectional view of the main handle-member of the implement showing the stapledriving means and magazine assembled in the interior thereof;

Fig. 3 is a longitudinal sectional view of the implement including the magazine, and also showing the staple-driver with the parts in operative position during the driving of a staple;

Fig. 4 is a similar longitudinal sectional view showing the slidable cover for the magazine with its attached staple-core as withdrawn and the staple-pusher retracted for loading the magazine through its under side;

Fig. 5 is a front elevational view of the fore-part of the implement showing the parts in normal position with the magaine swung downwardly from the handle-member;

Fig. '6 is a similar view showing the staple-magazine swung upwardly during the driving of a staple into the work;

Patented Nov. 6, 1956 Fig. 7 is an end elevational view of the implement viewed from the rear;

Fig. 8 is a transverse sectional view on line 8-8 of Fig. 2;

Fig.9 is a transverse sectional view through the handlemember of the implement taken on' line 9-9 of Fig. 1;

Fig. 10 is a perspective view of the spring for retaining the magazine pivot-pin in place;

Fig. 11 is a longitudinal sectional view through the fore-part of the implement showing a modified form of construction at the front of the staple-magazine below the staple-throat;

Fig. 12 is a fragmentary detailed view of the forward end of the staple-magazine in its modified form; and

Fig. 13 is a transverse sectional plan view at the forward end of the magazine showing the throat or driveway for the staple-driver.

Fastener-applying implements of the so-called hammertacker type are used quite generally for attaching tags, labels, and the like to articles of commerce and for fastening many other objects in place, tacking upholstery fabrics to furniture, fastening carpets and matting to floors, and nailing shingles and siding to buildings. Such implements are swung in the manner of an ordinary hammer with the fastener-driving mechanism actuated by impact of a movable part with the work in which the fastener is reversed bottom side up. The present improvement also provides a slidable cover for opening the under side of the magazine with said cover carrying a staple-core which is withdrawn therewith to also retract the staple-feeding means or pusher,

Referring to the drawings, Fig. 1 illustrates the implement as comprising a hollow handle-member 2, preferably constructed of sheet-metal with a weighted head at its forward end and a handle 3 on its rearward extension of substantially oval conformation (Fig. 9) to adapt it to be conveniently gripped by the fingers. Pivoted substantially intermediate the ends of the handle-member 2 between the sides thereof is a hollow staple-magazine 5 containing a retractible staple-core 6 attached to or forming a part of a cover 7 that is slidable longitudinally of the magazine to open its under side. The magazine 5 i constructed of sheet-metal folded into inverted channel-shape (Fig. 9) with a top wall 8 and depending side walls 9. Fastened to the top of the staple-magazine 5 is a bearing member 10, preferably constructed with a fiat base-portion having lugs 11 inserted through holes in the top of the magazine and welded or otherwise suitably fastened thereto. The bearing member 10 has a raised portion 12 (Fig. 2) from the center of which a rectangular lug 13 projects upwardly and is formed with a transverse hole 14 for receiving a pivot-pin 15. Referring to Fig. 9, the ends of the pivotpin 15 project through holes in the side walls of the handle-member 2 for hingedly connecting the magazine thereto. Preferably, an insert 16 formed of sheet-metal and arched to fit around the interior of the handle-member 2 is applied thereto for extending and reinforcing the bearing holes for the pivot-pin 15. The pivot-pin 15 may be removably secured in place by means of a flat springelement 17 (Fig. 10) apertured at its center to receive the projecting lug 13 of the bearing member 10 and overlie abutments 18 at the ends of its base portion, the metal of said base being cut away at 19 to form said abutments.

The pin 15 is scored on its under side with transverse grooves 20 (Fig. 9) engageable by the relatively narrow pin 15 may be transversely slotted at 22 for receiving a screw-driver to adapt it to be rotated in the holes in the sides of the handle-member 2. The pin 15 is first inserted through the holes above the spring 17 and then rotated to engage the narrow portions 21 of the spring with the slots 20. By this means the pin 15 may be securely fastened in place for pivotally mounting the magazine within the interior of the handle-member 2 while adapting the pin to be conveniently removed by rotating it to release its slotted engagement with the spring 17 should it become necessary to disassemble the parts of the implement for repair or replacement.

The forward head portion of the handle-member 2 is shaped with its top wall rising upwardly and then extending horizontally in a flat wall 24 attached to a front closure-plate 25. The front plate 25 is of relatively thick metal formed to fit snugly against the forward edges of the top and side walls of the handle-member 2 and fastened thereto by welding or other suitable means to provide closed joints. Extending vertically on the inside of the front closure-plate 25 is a relatively narrow projecting strip 26 constructed integral with the plate or suitably attached thereto.

Underlying the top wall 24 at the head end of the handie-member 2 is a rectangular pad 30 of resilient material such as fiber, rubber or preferably cemented fabric layers impregnated with a suitable adhesive such as latex. The pad 30 serves as a bufier to cushion the blow in striking the implement against the work, being held in place against the front plate 25 and above the strip 26 by means of a curved ear 31 sheared from the metal of the handlemember 2 and bent downwardly to engage against the rearward end of the pad. At the rearward end of the pad 30 is a cylindrical hole 32 serving as a pocket for containing a helical spring 35 which has dual functions, later explained, for normally swinging the forward end of the magazine 5 downwardly as shown in Fig. 4 and also operating latching means for the cover 7.

Rising from the forward end of the magazine 5 are a pair of laterally-spaced plates 40 (Fig. 5) welded or otherwise suitably fastened to the sides 9 thereof and having inturned flanges 41 at the front with their edges disposed in spaced relationship. Welded or otherwise fastened to the bottom edges of the side plates 40 is a rectangular foot 42 of thicker metal which is rounded on its under side throughout its marginal portions. The upper portion of the side plates 40 are reinforced by an insert 43 consisting in a folded U-shaped member having side walls 44 welded thereto and a front wall 45 spanning the space between the edges of the flanges 41. The flanges 41 are reduced in thickness along their inner faces to form shoulders 46 which cooperate with the sides of the front wall 45 and provide vertical grooves 47 constituting a throat or guideway for the reciprocable staple-driver 50, see Fig. 3. As shown in this view the foot 42 is formed with a rectangular opening 48 with grooves 49 in its sides providing a continuation of the grooves 47 to complete the staple-throat.

The staple-driver 50 is of relatively short length having its main vertical portion provided with projecting flanges 51 at the sides adapted to slide in the grooves 47 which form the throat for the staple being driven. The upper end of the driver 50 is formed with a forwardly-projecting head 55 arranged to project through an opening 56 cut through the lower end of the front plate 25. Preferably, the head 55 of the driver 50 i beveled along its top toward the front with a rearward flat portion adapted to engage' 5 is'swung upwardly into the interior of the handle member 2. Normally, the forward end of the magazine 5 is swung downwardly into the position shown in Fig. 4 by the action of the spring 35 pocketed in the hole 32 of the pad 30. The lower coils of the spring 35 surround a plug or button 58 with this end of the spring seated on a rim or flange at the bottom thereof. The button 58 has a projection or teat 59 on its bottom engaging in a hole in the outer end ,of a lever or arm 60 pivoted on a pin 61 held in holes in the side plates 40 of the magazine 5. The outer end of the lever 60 is shaped to form a bevel-sided cam 62 for engaging a roller 63 which is rotatable on a pin 64 held in the sides of a rockable latch-lever 65. The pin 64 is riveted through holes in paced ears 66 projecting upwardly from the lower portion of the lever (Fig, 3).

The latch-lever 65 is rockably mounted between spaced cars 69 projecting rearwardly from the side plates 40 by means of a pivot-pin 70 inserted through holes in the ears and riveted over at its ends. The pivot-pin 70 extends through a bore in the lever 65 which is slotted at the bottom to form spaced lugs 71 and 72 with a bevel-sided opening therebetween; this formation in the bottom of the latch-lever 65 being provided to adapt it for engagenent with detent-means at the forward end of the covermember 7 for holding the latter in its closed relationship as later explained.

The cover-member 7 is preferably constructed of sheet-metal struck up in tubular form to provide a bottom wall 75 and vertical side walls 76. The side walls 76 of the cover 7 are folded inwardly at the top to form flanges 77 overlying the top of the magazine 6 to adapt the cover to slide thereon. A space is left between the ends of the flanges 77 (Fig. 9) to provide clearance for the bearing member 10 when the cover is slid rearwardly on the magazine to open its under side. Adjacent the forward end of the cover 7 the flanges 77 are formed with transverse slots 78, thereby providing detent-members 80 with which the lug 72 on the latch-lever 65 engages for locking the cover in its forward position shown in Figs. 1 and 2. The lug 72 is preferably extended at the sides (Fig. 8) to increase the area of the engaging faces. At the forward end of the cover 7 its sides are fluted or indented to form closely spaced vertical slots 81 separated by narrow bars which provide gripping surfaces for the fingers during manual manipulation in sliding the cover forwardly or rearwardly on the magazine 5. The bottom wall 75 of the cover 7 is offset upwardly throughout its length to provide a raised platform for mounting the staple-core 6 (Fig. 8) which may be welded or otherwise suitably fastened thereto. At the front end of the cover 7 its bottom wall 75 is extended forwardly beyond its side walls 76 to provide a stop engageable with the inturned flanges 41 on the side plates 40 to limit the forward sliding movement of the cover and locate the end of the core 6 in operative relation to the grooves 47 forming the staple-throat. The rearward end of the handle-member 2 is formed with indentations in its sides providing inwardly-projecting metal loops 82 (Fig. 7) engageable by the end of the cover 7 for preventing its complete withdrawal from the handle-member. The forward end of the handle-member 2 is similarly indented to form stops 83 (Fig. 5) for engagement by the projecting ends of the pin 61 to limit the downward swinging movement of the magazine 5.

As shown most clearly in Figs. 7 and 8, the staplecore 6 is constructed of sheet-metal folded into hollow rectangular form in cross-section with a bottom wall 84 and side walls 85 folded inwardly to a slight extent at the top. At its forward end the side walls 85 have relatively narrow tabs, 86 folded inwardly with their ends substantially meeting at the center. The flanges 86 are. inclined upwardly at a slight angle to adapt them to conform to the crowned crossbars of the staples s (Fig.

' 9) used with a preferred type of fastener-applying, de-

Referring to this latter view, a staple-pusher 90 of structed of sheet-metal with side walls 91 for straddling the sides of the core and a top wall 92 crowned to con= form to the crossbars of the staples s.

A relatively narrow blade 93 (Figs. 3 and 9) projects downwardly within the interior of the pusher 90, being fastened in place by a portion 94 at the top inserted through a slot in the top wall 92 and soldered, welded or riveted in connection therewith. Projecting rearwardly from the blade 93 is a small tongue 95 for engaging within the forward end coils of a compression spring 96 enclosed in the core 6 with its rearward end abutting a cross-pin 97 held in holes in the sides of the core. The forward end of the central blade 93 is adapted to engage against the tabs 86 (Fig. 5) at the front end of the core 6 to limit the forward sliding movement of the pusher under the force of the spring 96. It will be observed by reference to Figs. 3 and 11 that the core 6 projects forwardly beyond the side walls 76 of the covermember 7 to the end of its bottom wall 75 so that this end of the core may be positioned in alinement with the grooves 47 in the side plates 40 so that the staples may be fed off the end of the core and into the staple-throat by the advance of the pusher 90.

Figs. 11 and 12 of the present drawings illustrate a modified form of construction for the fore-part of the staple-magazine 6 and foot 42, the front of the foot being slotted rearwardly to provide an opening 99 forming an extension of the opening between the flanges 41 on the side plates 40. The purpose of this construction is to provide access to the staple-throat for reaching a staple jammed therein to remove it should the throat become clogged. Otherwise, the construction of the fore-part of the implement shown in Figs. 11 and 12 is similar to that previously described.

The construction and arrangement of the present improved machine having been described in detail its method of operation will next be explained.

To prepare the implement for operation the magazine 5 is opened for loading it with aples by sliding the cover 7 rearwardly therealong antil its end strikes the stops 82. This may be accomplished most conveniently by gripping the fluted sides at its forward end in the fingers of the hand. This operation withdraws the core 6 which is fastened within the cover and also acts to retract the staple-pusher 90 therewith as the end of the blade 93 in its interior is engaged by the tabs 86 at the forward end of the core. Normally, the cover 7 is held in its forward closed relationship (Fig. 1) by the engagement of the lug 72 on the latch-lever 65 with the detent-members 80 at the front end of the cover;

the spring 35 acting to maintain the lever 60 depressed and cause its cam-shaped end 62 to pry the roller 63 toward the rear and hold the latch cocked. When, however, force is applied to withdraw the cover 7 the latchlever 65 will be rocked counter-clockwise against the pressure of the spring 35 by the engagement of the detent-members 80 with its lug 72. As the spring 35 is contracted the latch will be rocked into the position shown in Fig. 4 with the roller 63 riding under the camshaped end 62 of the lever 60. After the cover 7 has been withdrawn to the extent indicated in Fig. 4 where its end strikes the stops 82, the implement may be inverted in position with the open under side of the magazine 5 above for inserting the staples thereinto. Usually, the staples are cemented together in a stick or refill strip and one or more of the sticks may be readily dropped into the magazine through its open side. Before the implement is reversed in position the cover 7 is slid forwardly on the magazine 6 by gripping it in the fingers and as its detent-members 80 ride into the opening in the latch-lever 65 and engage against the lug 71 to rock the latch-lever clockwise, thereby'causing the roller 63 on the lever to ride under the cam-shaped portion 62 of the lever 60 and engage its beveled end as shown in Fig. 2. The force of the spring 35 will then react against the lever 60 to apply pressure against the roller 63 for holding the latch-lever in' locking position with the cover 7 in its foremost relationship with the end of its bottom wall 75 engaging the inturned flanges 41 on the side'plates 40. i I g The implement may now be applied to use by wielding it in the manner of a hammer to cause the foot 42 at the forward end of the magazine 7 to be struck against the work at the point where a staple is to be inserted. Under the force of the blow exerted in this manner the magazine 5 will be swung upwardly within thethandlemember 2 (Fig. 3) as the spring 35 is compressed. As the forward end of the magazine-5 moves upwardly into the head of the implement the head 55 of the stapledriver 50 will be engaged by the end of the projecting strip 26 to slide the driver downwardly in the grooves 47. The bottom edge of the driver is thus caused to engage the staple s in the throat at the end of the magazine to drive its legs into the work, indicated at W in Fig. 3. After each staple has been applied to the work the implement is swung upwardly a convenient distance and thereafter another blow is struck with the foot 42 on the magazine 5 striking the work to repeat the same cycle of operations. In this way, any number of staples may be driven in rapid succession by simply striking repeated blows with the implement without other exertion on the part of the operator. After. the large supply of staples contained in the magazine has been exhausted the implement may be easily and conveniently loaded again in the manner first explained by withdrawing the cover 7 to open the side of the magazine.

While the'improvements are herein shown as embodied in a hammer-type implementof preferred construction, by'way of example, it'is to be understood that modifications may be made both in thestructure and arrangement of the elements of the device and the manner of applying the improvements thereto without departing from the scope -of the invention as expressed in the following claims. Therefore, without limiting myself in this respect, I claim:

1. In 'a fastener-applying implement, a supporting member, a magazine for fasteners hinged to said member to pivot realtively thereto, said magazine having an opening in its side for loading fasteners thereinto, a cover having means for slidably mounting it on said magazine for opening and closing said opening in its side, a staple-core extending longitudinally within said cover and fast therewith, means for advancing the fasteners on said core to feed them forwardly in the magazine, a latch,.means at the forward end of the magazine for pivotally mounting said latch thereon, detent-means on said cover engageable by said latch for retaining the cover in position to close the opening in the magazine, and resilient means for controlling said latch to hold it in engagement with said detent-means, said resilient means also acting between the supporting member and latch to swing the forward end of said magazine downwardly relatively to said member.

'2. In .a' fastener-applying implement comprising a handle-member having a head at one end, a magazine for fasteners hinged to said handle-member to swing downwardly therefrom, said magazine having an opening in its side for loading fasteners'thereinto, a lever, means at the forward end of said magazine for pivotally mounting said lever thereon, a latch-lever, means at the forward end of the magazine for pivotally mounting said latch-lever adjacent'said first-named lever, a spring held in the handlemember and acting against said first-named lever to engage it with the latch-lever for swinging the magazine downwardly, a cover constructed to slidably mount it on the magazine to close the opening in its side, and means at the forward end of said cover engageable by said latchlever to hold the cover in closed relationship on the magazine under the force of the spring applied against said latch-lever.

3. In a fastener-applying implement comprising a handle-member with a head at one end, a hollow magazine pivoted to said handle-member to adapt its forward end to swing downwardly therefrom, said magazine being open on its under side for receiving a supply of fasteners, 21. throat at the forward end of said magazine, means within the magazine for feeding the fasteners successively into said throat, a lever, means at the forward end of the magazine for pivotally mounting said lever thereon, a latch-lever, means for pivotally mounting said latch-lever at the forward end of the magazine, said latch-lever being engageable by said first-named lever to cause it to rock clockwise about its pivot, a spring arranged between the head of the handle-member and said first-named lever to act thereagainst for normally swinging the forward end of the magazine downwardly relatively to the handle-member, a cover for closing the open side of the magazine, said cover connected to said magazine to adapt it to slide rearwardly thereon to open the magazine for loading fasteners thereinto, and means at the forward end of said cover engageable by the latch-lever to maintain said cover in closed relationship.

4. In a fastener-applying implement comprising a handle-member having a head at one end, a hollow staplemagazine hinged to said handle-member to adapt it to pivot realtively thereto, said magazine having an opening in its side, means extending upwardly from the forward end of the magazine and provided with a throat for receiving staples fed from the magazine, means in the magazine for successively feeding staples into said throat, a lever formed with a cam-shaped end, means at the forward end of the magazine for pivotally mounting said lever thereon, a latch-lever, means for pivotally mounting said latch-lever adjacent said first-named lever, said latch-lever having means engageable by the cam-shaped end of said firstnamed lever, a spring held in the head of the handle-member and operative to rock the first-named lever downwardly to pivot said latch-lever, a cover connected to said magazine and slidable thereon to close its open side, and detentmeans at the forward end of said cover engageable by said latch-lever to normally maintain the cover in closed relationship on the magazine.

5. In an implement of the type indicated comprising a handle-member having a hollow head at one end, a hollow magazine for containing a supply of staples, said magazine open on its under side for loading the staples thereinto, means for pivoting said magazine to the handlemember to adapt its forward end to swing downwardly relatively thereto, an upright member at the forward end of the magazine formed with a throat for receiving staples fed from the magazine, a lever pivoted to the upright member on the magazine and formed with a beveled end, a latch-lever pivoted to said upright member and having means engaged bythe beveled end of said first-named lever, a spring in the head of the handle-member engaging said first-named lever to cause it to act against said latchlever to rock it, a cover connected to the magazine and slidable thereon to close its open under side, and detentmeans on the cover engageable by the latch-lever to normally lock it in closed relationship on the magazine, said cover being slidable rearwardly to open the magazine for loading staples thereinto and said latch-lever being rockable against the tension of said spring when the cover is slid in either direction.

6. In a stapling implement comprising a hollow handlemember open on its under side, a staple-magazine pivoted between the sides of said handle-member to adapt its forward end to swing downwardly relatively thereto, said magazine having an opening in its under side, means at the forward end of said magazine providing a throat for receiving staples fed from the magazine, a cover connected to the magazine and slidable relatively thereto to open and close the opening in its under side, a latch, means at the forward. end of the magazine for pivotally mounting the latch thereon, means on the cover engageable by said latch to retain said cover in its forward closed relationship, and a spring in said handle-member operating to normally maintain the latch in position to lock the cover in closed relationship while being adapted to yield to unlock the cover to adapt it to be retracted for opening the under side of the magazine.

7. In a fastener-applying implement, a hollow magazine for containing a supply of fasteners, said magazine having an opening in its side for inserting a supply of staples therethrough, a throat at the forward end of the magazine, a cover connected to the magazine and slidable longitudinally thereon to close the opening in its side, a staplecore fast in said cover and slidable therewith when said cover is retracted to open the magazine, said core being slidable through a series of staples held in the magazine when the cover is slid to close the opening in the magazine, a latch, means at the forward end of the magazine for pivotally mounting said latch thereon, detent-means on the cover engageable by said latch to normally maintain the cover in its closed relationship on the magazine, and a spring for normally holding said latch engaged with said detent-means while allowing it to pivot to release the detent-means when a force is applied to the cover to retract it on the magazine.

8. In a staple-applying implement, a channel-shaped magazine for containing a supply of staples, said magazine open on its under side for loading the staples thereinto, a cover slidably mounted on the magazine and adapted to close its under side, a staple-core mounted fast within said cover to adapt it to slide therewith for inserting it through a series of staples held in the magazine, a pusher slidable on said core for advancing the staples in the magazine, resilient means for sliding the pusher forwardly in the magazine, releasable latching means at the end of said magazine for normally holding said cover in closed relationship relatively thereto, and means on the cover engageable with said pusher for retracting it with the core when the cover is slid to open the magazine.

9. In a staple-applying implement, a channel-shaped magazine for containing a supply of staples, said magazine having an opening extending longitudinally of its under side, a cover slidably mounted on said magazine and formed to close its open side, resiliently-actuated latching means on said magazine and cover engageable for normally maintaining said cover in its closed relationship on the magazine, a tubular staple-core fast within said cover to adapt it to slide therewith for insertion through a series of staples contained in the magazine, a pusher slidable on said core for feeding the staples forwardly thereon, a spring extending longitudinally within the core and engaging the pusher for sliding it to feed the staples forwardly in the magazine, and means engageable between the core and pusher for withdrawing the pusher during the retraction of the cover for opening the magazine.

10. In a fastener-applying implement, a hollow magazine open on its side for loading it with fasteners, a cover slidably mounted on said magazine to open and close said opening, a core extending longitudinally of said cover for supporting fasteners thereon, means slidable on said core for feeding the fasteners forwardly therealong, a latch having an opening in its lower end, means for pivotally mounting said latch at the forward end of the magazine, detent-means at the forward end of said cover engageable with the opening in said latch to pivot it and lock said cover in closed position as it is slid forwardly on the magazine and to release said latch when the cover is slid rearwardly on the magazine, and a spring for controlling the position of said latch to maintain it engaged with or released from said detentmeans.

11, In a stapling implement, a hollow magazine having a top wall and depending sides forming an opening on its under side for loading staples thereinto, a cover enclosing said magazine and having a bottom wall and upstanding sides with inwardly-projecting flanges at the top overlying the top of the magazine for slidably mounting it thereon, a core fast in the cover extending longitudinally of the bottom wall thereof and projecting upwardly through the opening in the bottom of the magazine, said core having a bottom and upstanding sides, a

staple-pusher mounted to slide on said core for feeding the staples therealong, and a spring extending between the side walls of the core and engaging said pusher to slide it forwardly on the core.

12. In a stapling implement, a hollow magazine open on its under side for the insertion of staples to load them therein, a cover enclosing said magazine and having a bottom wall and upstanding side walls with inwardlyprojecting flanges at the top overlying the top of the magazine for slidably mounting said cover thereon, a U- References Cited in the file of this patent UNITED STATES PATENTS 2,325,341 Polzer July 27, 1943 2,342,818 Polzer Feb. 29, 1944 2,345,267 Keil Mar. 28, 1944 2,667,638 Segal Feb. 2, 1954 2,680,245 Morano June 8, 1954

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