US1486639A - Stapling machine - Google Patents

Description

Mmm u 1924., www@ J. B. cRoFooT STAPLING MACHINE.

Filed oct; 27. 1922 k2 shams-sheet 1 Mwah M 1924i@ I lf@ J. B. cRoFooT STAPLING MACHINE Filed Oct. 27 1922 2 Sheets-Shea?. 2

Patented ilil, ilfll.

UNHT@ @FATES JOEE B. CROFOOT, OF CHCAGQ, ELLINGIL'S.

Application filed October 27, 1922. erial No. 597,358.

To4 all whom t may concern.'

Be it known that I, JOHN B. Cnoroo'r, a citizen of the United States, residing at Chicago, in the county of Cook and State of lllinois, have invented certain new and useful improvements in Stapling Machines; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

'llhis invention relates to stapling machines and has for an object to provide a staphng machine which will set the last staple of strip without jamming the machine.

Afurther object of my invention is to provide a stapling machine with a feed pawl adapted" to engage openings in the backs of the staple strip and with a holding pawl adapted to openings in the necks of the staple strip.. p

With these and other objects in vie'w the invention comprises certain novel parts, units, elements, combinations, arrangements and functions, as disclosed in the drawings, together with mechanical and functional equivalents thereof, as will be hereinafter more fully described and claimed.

lln the drawings:

Figure 1 is a view partlyvin side elevation and partly in vertical longitudinal section through a machine embodying the present invention, the staple strip being shown at aflvanced or forwardly fed position;

-Figure 2 is a view taken on the same plane as Figure 1 with a staple unit shown in detached and set position and the feeding means drawn back for feeding the strip;

Figure 3 is a horizontal sectional viewr taken on line 3`3 of Figure 2;

Figure 4 is a vertical sectional view taken on line 4 4: of Figure 2 showing the feed and hold-back in end elevation and a staple K in set position;

` `lEigure 5 is a perspective view of the feed and hold-back in ie of their relative positions but detached from the other or supporting structures;

Figure 6 is a perspective view pf a single staple unit detached from the .strip showing one ofthe many forms in which the staple including the perforations may be made and of the design shown in elevation at Figure 3;

Figures 8 and 9 are views in elevation of the back of staple strips each embodying slight variations in design but each adapted to be operated with the machine of the pres-- ent invention.

Like characters of reference indicate corresponding parts throughout the several views.

As shown in the drawings the stapling machine is designed as a machine for inserting staples into boxes or other bodies or objects as distinguished from employing the staples for fastening together papers or the like, but s uch showing is not intended as in any way limiting the present invention as the feeding. .mechanism is as applicable to a machine for fastening together papers or the like as a specific type of machine disclosed, and the machine shown as it is is only illustrative of a machine for employing the present invention. The machine of whatever type and for whatever purpose will, and as it ordinarily does, employ a plunger 10 which is normally held yieldingly upward by a spring 11 and is depressed by a blow of the hand upon the head 12. The machine also employs a knife 13 serving also as a guide for the staple strip, all in substantially theulsual and well-known manner. No novelty for the features just mentioned or described is claimed in the present instance and it is the intention of the present invention to employ any usual and ordinary machine of the type now known or hereinafter originated for the purpose. rlhe machine will also employ a sliding bolt 14 controlled by a spring 15, the plunger 10 having a cam surface 16 operating against an incline 17 on a sliding bolt so that as the plunger 10 reciprocates in the well-known manner, the sliding bolt also reciprocates. 'llhe sliding bolt carries a feed indicated as an entirety at 18. This feed member is pivoted to the` bolt 14 at 19 as is the common practicein the art and employs a spring 2O for the purpose of holding the feeding extremity of the feed in proper operative engagement with the staple strip to be hereinafter more fully described. A hold-back member or detent 21 is also pivoted at 22 controlled by a spring 23, as is also common in the art..

The present invention resides in the modiication of these feeding and hold-back mem-Y in conjunction vunits and upon opposite si bers by providing the feed member with two `feeding points 24 and the hold-back or detent with a single point 25. To operate with the hold-back having a single point 25 a staple strip is necessary having openings 26 intermediate the staple units, as shown more particularly at Figure 3 which discloses a'v top plan view of the staples as they may be looked down upon resting upon the guide knife 13. These peryforations or openlngs 26 are formed in that section of the staple strip intermediate the units so that the severing ofthe units is brought about by the severing of the two attenuated connecting stri s between the es of said perforation 26. The appearance of these severed stri s is indicated at 27 in Figure 6. Also in t e back of the unit itself an opening or openings are 'provided in the type shown at 28. These openings 28 are prop- `irly spaced to be engaged by the points 24 ofthe feed, the relation of the feed and holdback being such that the feed points 24 enage in the opening 28 whereas the point 25 of the hold-back engages in the perforation 26. The result of this arrangement of the perforations in the units and strip and the co-action of the specific type of feed and hold-back is such that the strip is moved forward so that, as indicated at Figure 1 the very over the end of the knife and into position to be. engaged by the descending an which eliminates the jamming c ogglng of the device resulting from the improper Y' placing of the last one or two units in the strip and enables the user not only to use all of the staples i effect an economy but also prevents vexation and annoyance resulting from the jamming and clogging of the device by the improper implacement of the last one or two units in operative position. While the staples shown at Figures2, 3 and 6 are found to be highly eicient and well adapted for the purpose 1t is obvious that the construction of the perforations circular as therein shown is immaterial and such perforations may be made elongated as shown at 29 and 30 in'Figure 7, or by making the perforations in other shapes, as indicated at 31 and 32 in Figure 9. Also it is obvious that the spacedlperforations in the back of the units as shown at Figures 6, 7 and 9 are immaterial to the present invention as the perforations may obviously be connected to 'form an elongated slot as shown at 33 at Figure 8 and this irrespective of the shape or relation of the .opening intermediate the units as shown at 34 in that figure. i

.While a number of different forms, types and 'designs of staples have been and are shown in the drawings, each adapted for operation with the machine and the improved last unit in the strip may be moved.

lunger in the strip and thereby' parts of the machine hereinbefore described, it is to be understood that the use of the said machine or machine parts is not in any way` limited by the showingy of the staples in the drawings and would include the use of any kind or design of staples adapted for coaction with said improved feed and holdback parts.

What I claim is:l

1. A stapling machine comprising a frame, a plunger therein` a staple strip support adapted to receive a staple strip composed of a plurality of staple units connected by integral connecting portions and provided with perforations in the backs of vthe'staple units, and a bifurcated pawl in said frame having spaced unit-engaging points so mounted on the frame as to engage the -perforations in the backs of said staple units and to feed the same to the plunger.

2. A stapling machine comprisinga frame, a plungern therein, a staple strip support comprising a knife-edge adapted to receive a staple strip composed of a plurality of staple units connected by integral connecting portions and provided with perforations in the backs of the staples, anda bifurcated pawl in the frame having staple unit engaging points so mounted on the frame as to engage the perforations in the backs of said staple units and feed plunger, and adaptedv in its feeding movement to be projected beylond said knife edge.

3. A stapling mac ine comprising a frame, a plunger therein, a staple strip support comprising a knife edge adapted to receive a staple strip composed of a plurality of staple units necting portions and provided with perforations in the backs of the staples, aibifurcated pawl in the frame'having staple unit engaging points so mounted on the frame as to engage the perforations in the backs of said staple'units and feed the same to the plunger, adapted in its feeding movement to be projected beyond said edge, and a detent proportioned' to engage between the units and prevent retroactive movement.

4. A stapling machine comprising a. frame, a plunger therein, a staple strip support adapted to receive a staple strip composed of a plurality of staple units connected by integral connecting portions and provided with perforations in the backs of the staple'units, a yspring-pressed bolt reciprocated by the plunger, and a bifurcated pawl carried by the bolt and having spaced unit engaging points so mounted as to engage the perforations in the backs of said vstaple unit and feed the same to the plunger.

`5. A stapling frame, a plunger therein, a staplestrip support adapted to receive a staple strip composed of a plurality ofstaple units connected vintegral connecting potions and pre1 the same to theY machine comprlsmg a.

connected by integral con-` .cated by the ineens@ vided with perforations in the backs of the staple units, a spring-pressed bolt reciprolunger, a, bifurcated pawl carried by the olt and having spad unit engaging points so mounted as to engage the perforatlons in the backs of said staple unit and feed the same to the plunger, and a detent proportioned to engage between the units and prevent retroactive movement,

6. A stapling machine comprising a frame, a plunger therein, a staple strip support comprising a knife edge and adapted to receive a staple strip composed of a plurality of staple units connected by integral connecting portions and provided with perfora-E tions inY the backs of the staple units, a spring-pressed bolt reciprocated b the plunger, and a bifurcated pawl carried by said bolt having spaced unit engaging points so mounted on the frame as to engage the perforations in the backs of said staple units and.` feed the same to the plunger, and

adapted in its feeding movement to be projected beyond said knife edge.

7. A stapling machine comprising e frame, a plunger therein, a staple, strip support comprising a knife edge adapted to re ceive a staple strip composed of a plurality of staple units connected by integral oonnecting portions and provided with perforations in the backs of theI staple units, a spring-pressed bolt reciprocated by the plunger, a bifurcated pawl carried by said bolt having spaced unit engaging points so mounted on the frame as to engage the perforations in the backs of said staple units and feed the same to the plunger, and adapted in its feeding movement to be projected beyond said knife edge, and a. detent proportioned to engage between the umts and prevent retroactive movement.

In testimony whereof I hereunto ax my signature.

JOHN B. CROFOOT.

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