US2606320A - Stapling tool - Google Patents

Description

Aug. l2, 1952 J. o. REECE ET AL 2,306,320

STAPLING Toor.

Filed Nov. 27, 1951 2 SHEETS-SHEET 1 Aug. 12, 1952 J. o. REECE ETAL STAPLING TOOL 2 SHEETS-SI-XEET 2 Filed Nov. 27. 1951 Patented Aug. 12, 1952 SEIAPLJING': TOOL John' OfReeee and Stanley H. ReeceQ London, England Appuatimmvember 27, 1951, serial No. 258341,

In Great vBritain November 28, 1950 6 claims. (ci. 1448.1)

'This invention relates to improvementsin stapling tools for use in applying individual staples froma strip cf stapling blanks to papers and the like for holding them connected together or for securing labels to boxes or similar uses.

An important object of the present invention is the Aprovision of a container for housing astrip of staples in the blank state, which strip can be of cortisiderable length so that it will. take a long time for a charge to be used up and before 'it will become necessary to put a fresh blank stripin the magazine. y

A further object o'f the invention is to enable the staples to be pre-formed to U-shape one'by one during the staple drivin-g motions of the tool.

Other objects include' the provision of simple means for driving the staples, pre-forming them from a strip of blanks, and for feeding them step by step to the pre-forming and driving positions.

The invention will now be described by wayof example with reference tothe accompanying diagrammatic drawings wherein:

Figure 1 is a side elevation of a tool made in accordance with the invention. The operating handle shown in full lines indicates the normal or inoperative position; the dotted lines=show the operative position of the handle;

Figure 2 is an'underneath plan of Figurel;

v Figure 3 is a sectional View onthe line 3-3 on Figure 2; y

Figure 4 is a Viewsimilar to Figure 3 v'but showing the tool at the position just prior to `driving a .staple and showing Va staple driveninto `the Work;

Figure 5 is a sectional view on the line 5-.5 on

Figure 3;

-Figure 6 is a sectional .View on the line 6-'6 on Figure 5; Y

Figure 'l is a perspective view of .a staple forming and driving tool and adjacent parts and showing a portion ci a strip .of blank staples; and

)Figure 8 is a perspective view of a staplerfeedine block.

The tool comprises a body a shaped to form a 'finger grip a2 and having a front vertical parte1 and an intermediate part a3 connecting the parts a1 and a2. The intermediate part a3 vis Vformed with a chamber a4 to contain a reel a5 of'staples in the form of a strip indicated generally by reference d in which the staples are connected together by a central rib a6 (Figure '7) and eX- tending transversely as wingsag spaced apart along the rib to leave spaces a3 betweenadjac'ent staples.

Thebodyhas aslot d2 leading from the chamber a4 and a horizontal slot d3 leading into a vertical opening d4` `in the lower end of thevertical part a1. The staples are lead throughvthe slots d? and d3 and the end staple enters the opening d'which-is the drivingl position.

ForV driving the staples there is provided a staple driving element b2 at the lower endvv of a plunger b which is slidably mounted in a vertical bore in the part al. The upper end of the bore is lclosed by a'plug`b4. A spring b5 in thebore urges the plunger downwards. The 'bore yand plungerare of enlarged 'diameter at their upper ends whereby the plunger has an annularshoul# der or projection bs and the bore has yarl-annular shoulder bl. The projection b5 engages the shoulder bl to limit the downward movement of the plunger. "The lpart al is slotted vat 'aFI to expose 'part of 4the projection b and to receive thevend c3 of-a handle c that is pivoted on a pivot pin c2 carried by the intermediate part a3 of the body.

lIfliffront end c3. has a cavity containing asliding catch c1 the nose of which projects out of the cavity and is normally held that position by a spring c5 that is in the cavity.V j

The body part al is providedwith-an anvil d4 adjacent the-driving position d5, thisanvil being ofle'ss width than theflat staple. Above the anvil .is a staple formingtool in theforr'n of two projections b3 integral with the driving element b2y on the plunger` b-and spaced apartso as to straddle the anvil and to press the ends of the lwings a9 of the staples downward to formthe staple into U-shape. During each staple driving movement of the plunger b the `projections b3 preform the staple next to the driving position.

For feeding the staple strip step by step 'there is providedfa staple :feeding block e'havng .aslot e? through which' vpasses a pin e .carriedby 4the ybody part al. 'Thelblock uhas a boreeatright angles to the pin e and a spring e3.1in'the1bo're :engages the pin so as to urge the blockback afterfits feedmction. The feed motion is eiected .by means of a 'curved blade spring' c1V that `is Iconnectedat one-A end 'to the handle '1C and `at itsfother end engages the'block e1. The block el has two downwardly extending projections e2 .spaced apart so as to straddle "the Yr'ib d6 and eng-age in-thespaces'a. The blade spring c4 urges the block in the' direction 'to feed the staples and the block also? turns about its'y pivot pine in the direction to cause the projections efto dipinto said spaces but these projections can; ride rup over the staples by rocking-about-said pin ontheretraction-of the blocks l 'l v Onthe rstpartof theroperative stroke of the handle c the catch c1 engages under the projection b6 and lifts the plunger b against the action of the spring b whilst the spring blade c4 moves the block e1 to feed the staple strip to bring the preformed staple from the anvil d4 to the driving position d5. On continued movement of the handle c the catch c1 moves past the projection b whereupon the spring IJ*s drives the plunger b downwards which causes the element b2 to drive the end staple f into the work g and simultaneously causes the projections b3 to form the next staple over the anvil d4. The pawl block e1 in its forward position shown in Figure 4 moves into engagement with or nearly into engagement with the cut back surface of the plunger b lbetween like projections b, this surface being shown by a vertical broken line in Figure 4 (see also Figures 5 and 7). can descend while the pawl e1 is in the forward position.

The spring c4, together with a spring a' located between the handle c and the body a3, returns the handle c to the full line position of Figure 1 .and during this return movement the catch c1 is repressed as it rides over the plunger b. The block or pawl e1 is returned by its spring e3 and the projections e2 ride back over the next staple and are thereby moved slightly upwards causing the block to be momentarily tilted albout the pin e, the rear end of the block riding down the spring c4. The spring c4 then acts on the rear inclined end of the block to tilt it back so that the projections e2 move down and engage behind the next staple.

We claim:

1. A stapling tool having a body adapted to carry a strip of staples, a pivot pin carried by the body, a staple feeding block provided with a slot through which said pin passes, a spring operatively disposed between said pin and staple feeding block to urge said block away from the staple driving position, and means connected between said block and handle for moving said block to effect its staple feeding motion.

2. A stapling tool comprising a body adapted to carry a strip of staples, means for driving the end staple of the strip, a strip feeding element slidably carried by the body, a handle movably carried by the body, a blade spring connected at one end to the handle and at the other end contacting said block for moving said block on its feeding motion, a spring for returning said block, means for driving the end staple, and means for operating said staple driving means when the handle is operated to move said block on its staple feeding motion.

3.1A stapling too1 having a body provided with a compartment adapted to contain a strip of staple elements in the form of a reel, a plunger reciprocatably mounted at one end of the body for driving the staples, a spring which effects the staple-driving movements of the plunger, a feed pawl for feeding the strip step by step, an anvil carried by the body, means carried by the plunger which straddle the anvi1 transversely of the line of feed of the strip so as to bend down the legs of the staple elements on opposite sides of the line of feed of the strip, a lever pivoted to the body at a position nearer to one end than the other thereby forming a long end and a short end, the long end constituting a handle extending over said compartment to a position on the side of the compartment remote from the plunger, means whereby the short end lifts the plunger against the action of said spring during the first part of Thus the plunger b, b2

its operative stroke and finally releases the plunger, means whereby the lever moves the pawl to feed the strip during plunger-lifting part of its stroke, and a finger grip provided at the other end of the body adjacent the long end of the lever on the side of the compartment remote from the plunger with said compartment located between the finger grip and the plunger. 1

4. A stapling tool comprising a body provided with a compartment and adapted to contain a Areel of staples, a movable lever, a pivot carrying said lever nearer to one end of the lever than the other providing a short end and a long end, the latter constituting a handle extending over said compartment to a position on the side of the compartment remote from the plunger, means operatedv bythe lever for feeding the strip step-bystep to bring the end staple to a driving position, staple driving means for driving the end staple at the driving position, and staple forming means for pre-forming the staples at a position preceding the driving position, a plunger slidably guided in a bore in one end of said body, said staple driving means and said staple forming means being carried by said plunger, an anvil carried by the body and located in the position of the staple next to the driving position over which anvil the staples are pre-formed by said staple forming means during the staple driving movement of the plunger, a shoulder on the plunger, a sliding catch located in a recess in said short end of the lever, and a helical spring in the recess in said short end said spring urging the catch out of the bore into engagement with said shoulder, said catch being adapted to lift the plunger then release it and finally move back to its position under the shoulder, and a nger grip provided at the other end of the body adjacent the long end of the lever on the side of the compartment remote from the plunger with said compartment located between the finger grip and the plunger.

5. A stapling tool having a body. an anvil attached to the body, a plunger for driving the end staple and simultaneously deforming the next staple over the anvil, a first spring which effects the staple-driving movements of the plunger, a pivot pin carried by the body, a feed pawl provided with a slot through which said pin passes said pawl forming with said body a horizontal slot leading a strip of staple elements over the anvil, a second spring operatively disposed between said pin and pawl to urge said pawl away from the staple driving position, said feed pawl being adapted also for feeding the strip of staple elements step by step, a lever pivoted to the body at a position nearer to one end than the other thereby forming a long end and a short end, the long end constituting a handle, means whereby the short end lifts the plunger against the action of said spring during the first part of its operative stroke and finally releases the plunger, and means whereby the lever moves the pawl to feed the staples during plunger-lifting part of its stroke.

6. A stapling too1 comprising a body provided with a compartment adapted to contain a strip of fiat staple elements in the form of a reel, a plunger reciprocatably mounted at one end of the body for driving the staples, a spring which operates on the plunger to effect the staple driving movements of the plunger, an anvil carried by the body, a part on said plunger for pre-forming the staples over the anvil at a position preceding the driving position, va lever pivoted to the body at a position nearer to one end than the other thereby forming a long end and a short end, the long end constituting a handle extending over said compartment to a position on the side of the compartment remote from the plunger, an abutment on the plunger projecting therefrom, a sliding catch located in a recess in the short end of the lever, a spring in the recess urging the catch out of the bore into engagement with said abutment, said catch being adap-ted to engage the abutment and lift the plunger against the action of its spring during the irst part of the stroke of the lever on the side of the compartment remote from the plunger and finally release the plunger, a feed paWl engageable in spaces between the staple elements for feeding the strip step by step, means for conveying feed motion from the lever to the feed paWl during the raising of the plunger against its spring, and a finger grip provided at the other end of the body adjacent the long end 6 of the lever with said compartment located between the finger grip and the plunger.

JOHN O. REECE. STANLEY H. REECE.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS

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