US2624878A - Stapling machine - Google Patents

Description

Jan. 13, 1953 H. w. MARANO STAPLING MACHINE Filed April 27, 1950 3 Sheets-Sheet l ff W' mi" /f l/ `A M@ i vI A TTORNE lY' Jan. 13, 1953 H. w. MARANO STAPLING MACHINE Filed April 27 1950 55 Sheets-Sheet 2 WIIIII ,fe-Reger h. Mp/wa ATTORNEYS Jan. 13, 1953 H. w. MARANO 2,624,878

STAPLING MACHINE Filed April 27, 1950 3 Sheets-Sheet 3 ATTORNEYS Patented Jan. 13, 1953 STAPLING MACHINE Herbert W. Marano, Brooklyn, N. Y., .assignor to Wilson Jones Company, Chicago, Ill., a corporation -of Massachusetts Application April 27, 1950, Serial No. .158,462

6 Claims.

The present invention relates to stapler or tacking devices. In particular, the present invention relates to a stapler of the hand-grip type, which may be held entirely within one hand for Vactuation, either by forcing one component against the other, or by resting one component thereof on a suitable support and hand-forcing the other component thereagainst.

The main object of the present invention is the provision of a device of the character `described wherein the staple advancing pusher is automatically locked in retracted position during the staple loading operation so as not to interfere with the staple loading, and is automatically released for advancing pressure against lthe staples lwhen the loading thereof is completed.

Still another obfect of the Vinvention `is the provision of a device of the character described including a staple pusher, which lstaple vpusher is normally slidable lflatly along a suitable support, but, on retraction .to permit staple loading, is rockable from the flat position and locked out of engagement with the staples.

Another object of the present invention is the provision of a hand stapler of the -character described which has substantially increased staple -capacity in relation to length.

Other and further objects of the present invention will in part be obvious, 'and in part specifically pointed out in the following description of an illustrative embodiment thereof.

In the drawings annexed hereto and forming .a part hereof,

Figure '1 is a longitudinal vertical section through one form of stapler device constructed according to and vembodying the `present invention;

Figure 2 is an enlarged similar .section of the hinged yrear end of the device, illustrating the staple ,pusher in retracted and locked position;

Figure 3 is an enlarged vsimilar .section of the front end of the stapler cove-r, in staple driving position;

Figure 4 is a section on the line 4--4 rof Figure 1.;

Figure 5 .is .a section .on the line .5--5 .of Figure 1;

Figure 6 is a Ipart plan :and part .horizontal section of the staple housing, trackway and staple pusher assembly;

vFigure 7 isa section'on the line 'I-l -of Figure 1; and

.Figure 8 is yan exploded perspective v.View of the components '.of a stapler constructed according Eto and embodying the :present invention.

, thereof for pivoting, as at 36.

The devi-ce of the present invention, indicated generally by reference numeral I0, comprises a base plate I2,.a cover 3D including a cover guide 50, and a staple magazine assembly, all of which elements are pivotally pinned together at one end thereof.

Base plate I2 comprises an elongated member having an anvil I4 secured to its forward end as by rivets I6., I6.. Anvil I4 may be fixed to base I2 as shown, but within the present invention may ybe shiftable lengthwise of base I2 and may have more than one set of staple guide grooves, as I 8, I8, to bend the staple legs inwardly or outwardly as desired, this being conventional in the art. The sides of base I2 are bent upwardly progressively from the front end 20 thereof towards the rear 22, to form - side walls 24, 24 of increasing height, walls .24, 24 .being extended rearwardly past end 22 .as at 26, 2-6, the extensions being transversely apertured .as vat .28, 2'8, .for pivoting purposes.

Cover Suis substantially as Vlong as base I2, and is provided with a downwardly depending skirt wall 32, Y32., transversely apertured at the rear 34 A drive member 38 of ,flat spring steel is provided and secured `to the underside of cover 30 as by rivets-4G, 40, member .3,8 having an integral downwardly projecting staple driver component 4,2 at the forward end thereof `and an .integral rearwardly and downwardly angled spring arm 44 .at the rear thereof.

Afcover guide 50 is provided, comprising a pair of spaced side bars .52, 52 connected by a narrow integralcrossstrip 54 near the front, and an integral .cross platform .5.5 at the middle. Bars 52, 52 .arespaced apart as to .t inside cover Sil, and they are transversely apertured -at the rear ends, as at 58, 58 to pivot with cover .30, apertures 58, 58 lining up with apertures 35, -36 in cover 3.0. Staple `driver 42 is notched along its upper sides, as Aat lil), .60, to a depth suicient to receive fingers 62, S2 projecting forwardly thereof from the top of side vbars 52, 52. Thus, when cover 30 and cover guide 50 :are pivoted about a common center, and :lingers .62, 62 fitted ,into notches 60, 60 `(see Figures r1 and 4.)., the pressure of spring arm 44' against platform -56 locks guide 50 within head 3.0, since the , projections 62, 62 extend well past staple driver 42 and are trapped within the notches 60,60..

The staple magazine assembly includes housing 64, staple support trackway 66, .staple pusher 168 and a staple feed yspring 1l), the latter `being mounted .about fa locating 4and guide rod 12 trapped Within strackway I66, lengthwise thereof.

Housing 64 comprises a floor portion 14 and upstanding side walls 19, 16 and an upstanding front wall 16. Sides 16, 16 are extended rearwardly of oor 14, as at 80, the extension being horizontally apei'tured as at 82, 82 for pivoting purposes. Wall 18 is notched, adjacent the top thereof, as at 19, to limit downward movement of cover guide 50 during a stapling operation. Staple driver blade 42, locked to cover guide 50, as guide 60 pivots into housing 64, slides against the inner aspect of housing wall 18, and is guided thereby in its straight line downward movement.

As seen in Figure '7, base I2, housing 64, cover guide 50 and cover 30 are pivotally connected at their rear ends, as by a rivet 84 passing through registering apertures 28, 82, 58 and 36, the respective elements being nested as shown. A base spring leaf 86 is secured to the upper surface of base I2 by rivets 88, 88, the free end 90 thereof angled rearwardly and upwardly bears against the underside of housing floor 14 to resist, to some degree, movement of housing 64 towards base I2. Within housing 64 is disposed the staple support trackway 66, including pusher 68 of the present invention.

Trackway 66 comprises a floor 92 and upstanding side walls 94, 94, the upper edges 96, 96 of which are flanged outwardly flatly and at right angles to walls 94, 94, as at 96` 96, flanges 96. 96

being so spaced apart as to permit conventionally7 sized staples to rest llatly thereontop, with the staple legs extended downwardly. As seen in Figures 4, and 6. the overall height of walls 94, 94 and flanges 96, 96 is such as to equal the length of conventional staple legs, as 98, the base |00 of the staples resting flatly atop flanges 96, 96. Floor 14 is cut away behind front wall 18, as at |02, to permit passages of staples therethrough under the influence of staple driver 42. Floor 92 is bent up adjacent the front end thereof as at 04, and the rear end thereof is bent up as at |05, the bendings defining parallel lugs at opposite ends of the trackways and having aligned transverse apertures |08, ||0 therethrough respectively. Trackway 66 is disposed within housing 64, atop floor 14, positioned so that the front end of the flanged portion is spaced one staples thickness from the inner aspect of housing wall 18, as indicated at |I2; the spacing at ||2 being in vertical alignment with opening |02 in the floor of housing 64.

Staple pusher 68 comprises a flat body portion II 4 with depending side Walls ||6, II6. A wing ||8 is struck out from body II4 and bent downwardly at right angles thereto. A second wing is struck out from body I 4 and bent upwardly therefrom at right angles thereto. Depending wing IIB is apertured, as at |22 to permit the passage of rod 12 therethrough, opening I 22 being larger than the diameter of rod 12. The forward ends of sides I6, I|6 are provided with integral inwardly direct-ed and extended spring lingers |24, |24, and the rear ends of sides I I6, ||6 are provided with integral, inwardly and rearwardly directed spring lingers |26, |26. These two pairs of inturned lingers serve to retain pusher 68 slidably and flatly atop trackway 66, while permitting a rockingor tilting action thereof at one portion of the trackway. It is to be noted that while the rear lingers |26, |26 are substantially the full height of sides IIS, II6, the front fingers |24, |24 are formed some little distance below body II4 thereby providing a space. as |28 between body ||4 and lingers |24, |24 (see Figure 2). The rear ends of flanges 96, 96 are bent downwardly, as at 91, 91, the bending limiting rearward movement of pusher 68.

Referring to Figure 8, it will be seen that flanges 96, 96 are notched as at |30, |30, near the rear end thereof. In assembling trackway 66, pusher 68 is slid over flanges or rails 96, 96 from the front thereof. The spring 10 is then threaded on rod 12, and the leading end of the rod passed through wing aperture |22 of pusher 68. The leading end of rod 12 is then passed through aperture |06 in lug |04, and the rear end of rod 12 p assed through aperture |I0 in lug |06. The projecting ends of rod 12 are then upsetras at |32, |32 to lock the parts together, and. the assembly is then secured, as by spot welding at |34 (see Figure 5) within housing 64 as above detailed.

Cover 30 and cover guide 50 are assembled, and fitted within the rear walls of housing 64, and thence between extensions 26, 26, and the parts pinned together for pivotal movement by rivet 64. As will be obvious, cover 39 and cover guide 50 will pivot substantially as one, while relatively swingable through the degree of arc permitted by fingers 62, 62, along notches 60, 60 in ram 42. Housing 64 is swingable with respect both to base I2 and the cover and guide assembly, but I provide means to releasably lock housing 64 to the cover and guide. These means comprise upwardly extended wings |36, |36 (Figures 5 and 8) formed atop side walls 64, 64, wings |36, |36 being transversely apertured as at |38, |38, these apertures lining up with outwardly bumped projections |40, |40 on the sides of bars 52, 52 of guide 50, the interit of the bumpings in apertures |38 spring holding the parts together against disengagement (except for permitting the insertion of staples into the magazine) during ordinary use of the device. located, there is suilicient space between the underside of guide bars and the top of flanges 96, 96 to permit sliding movement of pusher 68 under the inuence of spring 10. The relative pivoting movement of guide 50 towards housing 64 is limited by fingers 62, 62 resting atop notches 19, 19 in housing wall 18 (Figure 4).

To load a supply of staples onto trackway 66, within housing 64, the cover and guide assembly 60 is released from the engagement of lugs |40, I 40 in apertures 38, |38 (Figure 5) and swung away from housing 64, into the position of Figure 2, thereby exposing the interior of housing 64 and tr-ackway 66 therewithin. Pusher 68 is then slid rearwardly on trackway 66 by manual pressure against upstanding wing |20, until the pusher passes notches |30, |30, this rearward movement being limited by downturned flange portions 91, 91.y As fingers |24, |24 pass notches |30, |30, a tilting movement is developed on pusher 68 by compression cf spring 10, due to the location of the points of action, and the front end of the pusher tilts upwardly and ngers |24, |24 raised above the level of notches |30,

|30. Thus, on release of the moving force', fin# gers |24, |24 will be spring pressed against the forward edgesof notches |30, I 30, to hold the pusher 68 temporarily in that position and out of the way while a strip of staples is laid into housing 64 with the staple bodies |00, |09 lying flatly atop flanges 96, 96 and the staple legs 98, 98 projecting downwardly into the space between housing walls 16, 16 and flanges 96, 96. When the staple supply strip is thus positioned,

cover 30 and guide 50 are swung, as a unit, over As so' against andv onto housing 64. Pusher 68 is locked,

at the rear ofthe device, nearer the pivot point, and as it is contacted by the lower edges of guide side bars 52, 52, bearing against the top of pusher body II 4, it will be retiltedv to force fingers |24, I24 down below flanges 96, 96, and out of engagement therewith, whereupon the normal expansile biasing of spring 'Ill will shift the pusher against the rear staple in the supply strip, forcing the 'staple strip forwardly until the first staple in the strip is urged against the inner aspect of housing wall 18, over opening |02, and in line with staple driver 42, as in Figures l and 4. Lug IM serves as a stop to engage wing I I8 on the underside of pusher 68, limiting the forward movement thereof.

'Io operate the device to drive `a staple, cover 38 is forced downwardly towards v .and against base I2, against the normal biasing of spring leaf 90, pressing against the underside of housing 74. As spring 90 is overcome and flattened, cover 36, guide E) and housing 'i4 approach base I 2, at which time staple driver 42 moves downjward behind wall 'I8 and through the channel opening II2, separating the leading staple from the strip and driving samel against anvil I4.

The cover 30, guide 50, housing 54, trackway 56 and base 24 are all formed, as by stamping or otherwise of fiat sheet steel. The parts are heat treated at locations where wear occurs, and the device, as a whole, may be brightly plated or otherwise treated to enhance its appearance.

With my trackway and pusher arrangement, it will be seen that the staple holding capacity of my device is substantially that of the length of the trackway, less the length of the pusher. The particular coil spring shown, which has a plurality of coils of different diameters, while operating quite well with my device, is not essential thereto, same being the subject of a copending patent application Serial No. 83,750, led March 16, 1949, which matured into Patent No. 2,528,444 on October 31, 1950, and which was reissued under No. Re. 23,349, dated March 27, 1951. As will be readily appreciated from the foregoing, my device may also be used to drive staples without deforming the legs thereof, as the cover 3U, guide 50, and housing assembly I4 may be swung away from and used independently of base I2. In view of the relatively small size it is possible to achieve with a stapler of the present invention, a chain C may, if desired, be linked to the end thereof, as in Figure 1, so that it can be hung on a suitable support.

Having now described my invention, what I claim and desire to secure by Letters Patent is: Y

l. In a stapling machine including a base, an upper member of inverted channel shape, and a staple driver blade projecting downwardly therefrom at the front end thereof, with the rear end of the upper member being pivotally supported on the base; the improvements comprising a lower member of channel shape open at the top and forming a magazine for staples, the rear end of the lower member being pivotally supported at the rear end of the upper member; a means at the front end of the lower member for retaining the staples; a staple supporting trackway disposed within the lower member and spaced from the sides thereof and from the staple retaining means; a pusher movably supported on the trackway for engaging the staples; yieldable means in the magazine to urge the pusher forward for moving the staples towards the retaining means; inwardly directed fingers on the opposite sides of the pusher'extending towards each other, the

trackway at the rear thereof having detentsifor the fingers, means for tilting the pusher with its front end upwards of the trackway upon manual retraction thereof for engaging the detents by the ngers thereby preventing the pusher from being moved by the urging means; a driver guide' between the cover and the upper member and interengaged with the cover to pivot therewith,"

the driver guide for yieldably depressing the raised front portion of the pusher when the `upper member and guide are moved downwardly therebyv releasing the pusher for forward movement under action ofthe urging means.

2. A stapling'machine as in claim 1, whereinf the pusher comprises a base portion disposed atop the trackway and is provided with walls depending from the sides of the base, `and the fingers extend inwardly below the trackway during movement of the pusher under the influence of the slide urging means.

3. In a stapling machinev including a base, an upper member of inverted channel shape, and a staple driver blade projecting downwardly therefrom at the front end thereof, with the rear end of the upper member being pivotally supported on the base; the improvements comprising a lower member of channel shape open at the top and forming a magazine for staples, the rear end of the lower member being pivotally supported at the rear end of the upper member; a means at the front end of the lower member for retaining the staples; a staple supporting trackway disposed within the lower member and spaced upwardly of the bottom of the lower member and from the sides thereof and from the staple retaining means in the front thereof; a pusher movably supported on the trackway for engaging the staples; yieldable means in the magazine to urge the pusher forward for moving the staples towards the retaining means; fingers on the opposite sides of the pusher bent inwardly towards each other, the trackway at the rear thereof having detents for the fingers, means for tilting the pusher with its front end upwards of the trackway upon manual retraction thereof for engaging the detents by the ngers thereby preventing the pusher from being moved by the urging means, a driver guide between the cover and the upper member and interengaged with the cover to pivot therewith, means to limit movement of the cover and guide towards and away from each other, the cover and the guide being manually separable from the lower member substantially simultaneously to expose the interior of said lower member and the pusher therewithin; and means forming part of the driver guide for yieldably depressing the raised front portion of the pusher when the upper member and guide are moved downwardly thereby releasing the pusher for forward movement under action of the urging means.

4. A stapling machine as in claim 3, wherein the driver blade has notched sides up from the bottom thereof, and the driver guide has forwardly extending spaced apart fingers at the front thereof passing through the notches in the blade for interengagement therewith.

5. A stapling machine as in claim 3, wherein yieldable means are provided between the cover acs-raarsv and the guide to urge them apart-saidv meansv comprising aleaf spring. 1' t 6. In a stapling machine including a base, an upper member the rear end of which is pivotally supported on the rear of the base, and a staple magazine between the base and upper member, the rear end of which magazine is pivotally supported on the rear of the base, the free ends of said base, magazine and upper member being separable at the unconnected ends; wherein the magazine is of channel shape open at the top with means at the front end thereof for retaining the staples; wherein a U- shaped member is secured within the magazine with the upper ends of the arms of the U-member bent over and outwardly to form a staple supporting trackway, the edges of which platform are spaced from the sides of the magazine and the front of which trackway is spaced from the staple retaining means at the front of the lmagazine whereby staplesfcan move within the magazine along the trackway and towards the retaining means; wherein a staple pusher is disposed atop the trackway, the pusher comprising a body portion resting atop the trackway, walls depending from the sides of the trackway and fingers on said walls at the front thereof bent inwardly under the trackway; wherein yieldable means are provided in the magazine between the arms of the U-member to urge the- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATNTS Number Name Date 2,073,819 Vogel Mar. 16, 1937 2,279,584 Vogel Apr. 14, 1942 2,309,779 Maynard Feb. 2, 1943 2,311,412 Pankonin Feb. 16, 1943 2,354,760 Lindstrom Aug. 1, 1944 2,427,156 Percoco Sept. 9, 1947 2,489,050 Ruskins Nov. 22, 1949

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