US2312142A - Stapling device - Google Patents

Description

Feb. 23, 1943. M. ABRAMS ET AL 2,312,142

STAPLING DEVICE Filed Jan. 8, 1941 "Patented Feb. 23, 1943 UNITED STATES PATENT OFFICE STAPLING DEVICE Morris Abrams and George Berger, Brooklyn, N. Y., assignors to Arrow Fastener, Inc., New York, N. Y., a-corporation of New York Application January 8, 1941, Serial No. 373,580

6 Claims. (Cl. 13)

is tov scribed, a staple magazine, and a cover hingedthereto and carrying the combination driver and spring, the cover being depressibleto swing relative to the staple magazine for' driving the staples.

Yet a further object of the present invention is staple magazine being further provided with lm-= proved means to limit relative rotation there between.

Yet a further object of this invention is to provide a stapling device of the character described, comprising a base, a staple magazine pivoted thereto and normally retained in raised position by a spring interposed between the base and the staple magazine, a cover hinged to the staple magazine and provided with spring means to swing the cover upwardly relative to the staple magazine, and driver means to drive the staple when the cover is depressed, to swing the staple magazine downwardly relative to the base, and the cover downwardly relative to the staple magazine.

Yet a further object of this invention is to provide in a stapling device of the character described, means to prevent the spring which moves the cover relative to the staple magazine, frombeing fully compressed'on a full downstroke of the cover.

Still another object of this invention is to provide a strong, durable and compact stapling device of the character described, which shall be and of which the scope of application will be indicated in the following claims.

In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is a side elevational view of a stapling device embodying the invention, with parts broken away and in cross-section;

Fig. 2 is a cross-sectional view taken on line 22 of Fig. 1;

Fig. 3 is a perspective view of the staple magazine, with the inner guide member for the staples removed, and with parts broken away and in I cross-section;

relatively inexpensive to manufacture, comprise few and simple parts whichshall be easy to manipulate, and yet practical and efilcient to a high degree in use.

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

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplifled in the construction hereinafter descrlbed ibo Fig. 4 is a perspective view of the inner guide member for the staples, with parts broken away and in cross-section;

Fig. 5 is a partial perspective view of the pushing device for the staples; and

Fig. 6 is a cross-sectional view taken on line 6-6 of Fig. 3.

Referring now in detail to the drawing, I0 designates a stapling device embodying the invention, comprising generally of a base II, a staple magazine I2, in which are housed staples l3, a staple pusher device I4 for feeding the staples,-and a cover I6 pivoted to the staple magazine and carrying a cap I I,

The base ll carries on its upper face, a usual anvil at its forward end. At the rear end of a base I i are a pair of parallel, upwardly extending walls 22 formed with aligned bearing openings 23. The base H is formed witha notch 24 on the underside thereof, and adjacent the rear end thereof, for the purpose hereinafter appear- Mounted on the Walls 22 and within the bearing openings 23, is a transverse pivot pin 25 on which the staple magazine [2 is pivotally mounted. The staple magazine l2 may be made from sheet metal and comprises a bottom Wall 21 and parallel, vertical, upwardly extending, symmetrical side walls 28. The sidewalls 28, are formed with longitudinal, inwardly curved channel portions 29 extending to the rear ends of the walls 28, but terminating short of the front ends of said side walls. The forward ends of the channels 29 are inclined upwardly and rearwardly, as at 30, for the purpose hereinafter appearing.

Extending inwardly toward each other, from the side walls 28 are aligned, front wall portions 32. The walls 32 form with the ends of the channels 29 tapering guide grooves 34, for the purpose hereinafter appearing. The grooves 34 increase in width from the lower to the upper ends thereof. The front walls 32 are preferably inclined upwardly and rearwardly about one degree, for the purpose hereinafter appearing.

At the rear ends of the side walls 28 are downwardly extending parallel ears 36 formed with bearing openings 31 through which the pivot pin 25 passes. The ears 36 are disposed between the side walls 22 and the base The side walls 28 are formed adjacent the upper edges thereof, and adjacent the rear ends thereof, with aligned bearing openings 38, for the purpose hereinafter appearing. Said side walls 28 are furthermore formed at their upper ends with aligned longitudinal cut-outs, grooves or notches 48 terminating short of the front and rear ends thereof. The edges 4| of the side walls 28 disposed between the notches 48 and the front walls 32 incline downwardly and forwardly, for the purpose hereinafter appearing.

Extending outwardly from one side wall 28, just rearwardly of the rear end of a notch 48, is a projection 43, which engages a slot 11- in cover IE to limit the upward movement of the staple magazine 2.

The bottom wall 21 terminates short of the front walls 32 leaving a space through which the staples may be driven. Mounted on the bottom wall 21. and between the side walls 28, is an inner guide member 58 for the staples l3. The inner guide member 58 has a top wall 5|, parallel to wall 21 and side walls 52, parallel to and spaced inwardly of the bottom portions of the side walls 28. The top wall 5| of the guide memher is spaced just below the channel portions of member I2. Said top wall 5| is furthermore formed with downwardly-depressed tongues 54 cut from the metal thereof and contacting the wall 21, and riveted thereto by rivets 55. The front end 56 of member 58 terminates short of the front walls 32, by a distance sufficiently to permit one staple to be driven between said front walls 32 and the front edge 56 of said inner guide member.

.The staple pusher member I4 is mounted on the inner guide member 58, and comprises a channel shaped member 51 slidably engaging the guide member and made of sheet metal. same has a top wall 58 and side walls 59 contacting the top wall 5| and side walls 52 of the inner guide member. Extending upwardly from the top wall 58 of said member 51, are three parallel vertical tongues formed with through openings 6|. Extending from the openings 6| is a rod 62 formed with projections 63 at its forward end.

The rod 62 has an upwardly and downwardly curved handle portion 62a at its rear end. On the rod 62 is a coil compression spring 64 interposed between one of the tongues 88, and a projection 65 on the rod 82 just forwardly of the handle 82a formed by a compression of the metal, pressed out enough to hold the spring in position.

It will now be understood that the spring 54, presses the member 51 forwardly and the latter in turn presses the frozen staples to always keep a staple in driving position. Channels 28 retain the staples on the inner guide 58. Attached to the upper side of the base II, as by rivet Ila, is a leaf spring H) contacting the underside of the staple magazine I2, to raise the same.

The cover l6 comprises parallel side walls 18 disposed on opposite sides of the side walls 28, and a top wall 1|, inclined somewhat upwardly and forwardly, and front walls 12 being inwardly from the front ends of the side walls 18. The

The

side walls 18 are formed adjacent their rear ends with bearing openings 15 to receive a pivot pin 16 passing through bearing openings 28 and the bearing openings 15. The cover I8 is thus pivoted to the staple magazine l2. One side wall 18 is formed with a vertical slot 11 through which the projection 43 extends. The projection 43 and slot 11 serve to limit relative rotation between the cover l6 and the staple magazine. Attached to the underside of the top wall 1| of the cover, as by rivet 88, is a combination spring and driver member 8| made from a single elongated piece of spring metal and having a downwardly extending driver portion 84, the side edges of which are disposed within the grooves 34, a top portion The portion 88 of member 8| serves as a spring to cause relative rotation between the cover and the staple magazine l2. When the cover is depressed, the staple magazine |2 will move downwardly until it moves no further, and the cover will then move downwardly relative to the staple magazine, and driver portion 84 of member 8| will drive the forwardmost staple towards the anvil 28.

It will be noted that the tapering groove 34 permits variations in the angle of the driver portion 84 as the cover is depressed.

It will be further noted that the forward and downward inclination of the edges 4| will permit the cover to be fullydepressed until stopped by said edges. The cut-outs 48 permit the cover to be fully depressed'without fully flattening the spring portion 88.

The cap I1 is attached to the front top portion of the cover by the rivet 88 and has downwardly extending side Walls Ho and a; downwardly extending front wall |1b.

It will be noted that there is only one projection 43 on one side wall of the staple'magazine, and it serves as a stop for the cover on its return stroke. The reason for not having stops on both sides is that should faulty staples become stuck in a machine, it is an easy matter to wedge something between the staple magazine or frame and the cover, thereby releasing the projection 43 from the slot 11 and permitting the cover to be swung upwardly all the Way, allowing complete access to the inside of the device for removing the faulty staples. If projections 43 were made on opposite sides of the staple magazine, it would not be an easy matter to release the cover from the staple magazine.

The bottom wall 21 of the frame or staple magazine |2 may be embossed or pressed upwardly at the openings which receive the rivets 55, to accommodate the heads of the rivets, so that the rivet heads will not project below the underside of said Wall 21.

It will be noted that the base comprises a front portion ||b having a raised wall He carrying the anvil, and downwardly extending, outwardly inclined, side and front walls I he and Id. The wall He is slightly inclined upwardly and forwardly, as shown in Fig. l of the drawing. Extending from the rear end of said wall I la is a rearwardly and downwardly inclined interconn tin p rtion Hi. from which there extends rearwardly, a flat, horizontal, bottom wall portion llg, from which the side walls 22 extend upwardly.

It will be noted that the spring llb is attached at Ila to the wall I lg. Since the end at which the spring is anchored is below the top wall He, said spring will not be fully compressed during the stapling operation.

The rear end of wall lly terminates short of the rear ends of said walls 22 to form the cut-out or notch 24, to permit the staple magazine and cover to be swung back and used as a tacker in the well known manner.

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

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

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

1. In a stapling device, a staple magazine comprising a bottom wall and upwardly extending side walls, said side walls being formed with longitudinally extending inwardly projecting channels and inwardly bent front walls, the front ends of the channels terminating short of said front walls and forming guide grooves therewith, a cover-having side walls, a top wall and pivoted to the staple magazine, the side walls of the cover being disposed on the outer sides of the side walls of the staple magazine, the side walls of the staple magazine having longitudinal cut-outs in the upper edges thereof; a combina-' tion driver and spring member attached to the underside of the top wall of the cover and having at one end a downwardly extending driver arm received within said guide grooves and at the other end a rearwardly and downwardly in clined spring arm engaged within the cut-outs in the side walls of the staple magazine.

2. In a stapling device, a staple magazine comprising a bottom wall and upwardly extending side walls, said side walls being formed with longitudinally extending inwardly projecting channels and inwardly bent front walls, the front ends of the channels terminating short of said front walls and forming guide grooves therewith,

a cover having side walls, a top wall, and pivoted to the staple magazine, the side walls of the cover being disposed on the outer sides of the side walls of the staple magazine, the side walls of the staple magazine having longitudinal cut-outsin the upper edges thereof, a combination driver and spring member attached to the underside of the top wall of the cover and having at one end a downwardly extending driver arm received within said guide grooves and at the other end a rearwardly and downwardly inclined spring arm engaged within the cut-outs in the side walls of the staple magazine, one side wall of the cover being formed with a slot, and a projection on a side wall of the staple magazine received within said slot.

3. In a stapling device, a staple magazine comprising a bottom wall and upwardly extending side walls, said side walls being formed with longitudinally extending inwardly projecting channels, and inwardly bentfront walls, th front ends of the channels terminating short of said front walls and forming guide grooves therewith, a cover having side walls, a top wall and pivoted to the staple magazine, the side walls of the cover being disposed on the outer sides of the side walls of the staple magazine, the side walls of the staple magazine having longitudinal cut-outs in the upper edges thereof, a combination driver and spring member attached to the underside of the top wall of the cover and having at one end a downwardly extending driver arm received within said guide grooves, and at the other end a rearwardly and downwardly inclined spring arm engaged within the cut-outs in the side walls of the staple magazine, one side wall of the cover being formed with a slot, and

a projection on a side wall of the staple maga-" zine received within said slot, said guide grooves increasing in width from the lower to the upper ends thereof.

4. In a stapling device, a staple magazine comprising a bottom wall and upwardly extending side walls, said side walls being formed with longitudinally extending inwardly projecting channels and inwardly bent front walls, the front ends of the channels terminating short of said front walls and forming guide grooves therewith, a cover having side walls, a top wall and pivoted to the staple magazine, the side walls of the cover being disposed on the outer sides of the side walls of the staple magazine, the side walls of the staple magazine having longitudinal cutouts in the upper edges thereof, a combination driver and spring member attached to the underside of the top wall of the 'cover and having at one end a downwardly extending driver arm.

received within said guide grooves, at the other end a rearwardly and downwardly inclined spring arm engaged within the cut-outs in the side walls of the staple magazine, a side wall of the cover being formed with a slot, and a projection on a side wall of the staple magazine received within said slot, said guide grooves increasing in width from the lower to the upper ends thereof, the front wall of said staple magazine being in clinedupwardly and rearwardly.

5. In a stapling device, a staple magazine comprising a member having a bottom wall and side walls extending upwardly from said bottom wall,

and walls extending inwardly from the front endsof the side walls and forming a front wall, said side walls being formed with longitudinal channels, the front ends of the channels terminating short of the front, wall to form grooves therewith, an inner staple guide member attached to the bottom wall and between the side Walls, said channels serving to. retain the staples on the inner guide member, a cover pivoted to said side walls adjacent the rear ends thereof, and a plunger on said cover and engaging within said grooves.

6. In a stapling device, a staple magazine comprising a bottom wall and upwardly extending side walls, said side walls being formed with longitudinally extending inwardly projecting chan-v rearwardly and downwardly inclined spring arm .engaged with the staple magazine.

MORRIS ABRAMS. GEORGE BERGER.

Images