US 2781515 A
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Description (OCR text may contain errors)
A. G. JUlLFs 2,781,515
STAPLE FEED MAGAZINE Feb. 19, 1957 Filed March 30, 1953 Eval.
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United States Patent firice STAPLE FEED MAGAZINE Albert G. Juilfs, Newtown, Ohio, assigner to Senco Products, Inc., Cincinnati, Ohio, a corporation of ho Application March 30, 1953, Serial No. 345,490
9 Claims. (Cl. 1-49) My invention relates to an improved magazine for feeding staples into position before a staple driver and is particularly adapted for use with narrow crown staples.
It is an object of my invention to provide a staple magazine which, size for size, is capable of holding a larger number of staples than magazines heretofore developed.
Another object of my invention is to provide a magazine capable of holding a supply of narrow crown staples.
Yet another object of my invention is to provide a magazine having a guide surface adjacent the crowns of the staples, said surface having means projecting within the body of the staple gun to a position llush with the bottom of the track in which the staple driver rides and into which track the staples are to be fed from the magazine. This feature is a specific application of the teachings of my Patent No. 2,585,942 to a magazine for feeding narrow crown staples, the said patent showing the general teaching in connection with the magazine for feeding broad crown staples.
Another object of my invention is to provide means within the magazine for feeding the staples evenly therefrom into position to be driven by the staple driver.
Another object of my invention is to provide a slidable cover having means to insure that the staples placed within the magazine arevuniformly disposed about the bar on which they ride. This same means will prevent the closure means from being jammed or held up by a 4staple which is not llush with the other staples and which may not have been forced all the way down on the bar.
These and other objects and advantages of my invention will become apparent to those skilled in the art from the following description and with the reference to the :accompanying drawings in which drawings like numerals are employed to designate like parts throughout the same and in which: Y
Figure 1 is a plan view of the magazine of this invention, with the cover not quite in its home position of closure,
Figure 2 is a side elevation of the magazine of Figure l,
Figure 3 is an enlarged section taken on the line 3-3 of Figure 2,
Figure 4 is an enlarged section taken on the line 4-4 of Figure 2,
Figure 5 is an enlarged section taken on the line 5 5 of Figure 2,
Figure 6 is a perspective view of a portion of the forward end of the cover or closure means employed with my magazine,
Figure 7 is an enlarged fragmentary section taken on the line 7-7 of Figure 6,
Figure 8 is a perspective view of the pusher or follower employed with the magazine,
Figure 9 is a plan view, partly in section, showing the magazine in operative position with respect to'a device for driving the staples, and
Figure l0 is a section taken on the line lil- 10 of Figure 9. Y
Patented Feb. 19, 1957 0 position as indicated at 16 but it will be understood that any suitablemeans for arranging the bar 14 within the opening 13 may be employed.
The top closure for the opening 13 defined by the members 1t), 11 and 12 -is indicated at 17. This closure means, cover or door is slidable within a pair of slots 18 formed in the members 10 and 11. The front end of the door or cover 17 is provided with a projecting tit 19. The underside of this tit 19 is beveled as indicated at 20 in Figure A7. The importance of this structure will be explained in greater detail shortly.
The door 17 is provided with a longitudinal slot 21.
and with a finger grip portion 22. As is best seen in Figure 1, the bar 14 projects beyond the ends of the members 10, 11 and 12, as indicated at 14a, a distance correspond-ing to the projecting tit 19 of the cover 17.
As best seen in Figures l and 5, a pin 23 is secured within the sides 10 and 11 at one end of the magazine, the pin passing through the bar 14. As shown in Figure 5 this pin may simply be screwed into the magazinev section as illustrated at 24. At the other or forward end of the magazine section I provide a pair of pulleys 25. These are best seen in Figures l and 3. It wil be understood that the pulleys 25 are freely rotatable within the opening 13.
A staple follower or pusher 26 rides on the bar 14 behind the strip of staples 15. This follower is best seen in Figure 8 and will be seen to have a pair of ears 27 extending from the rear thereof. This follower is U- shaped in cross-section and has a button 28 projecting from the top thereof. This button 28 rides within the slot 21 of the cover when the parts are in their operative positions.
Within the opening 13 are provided springs 29. Each of the two springs 29 has one end xed to the pin 23. Each spring then travels around one of the pulleys 25 and is fastened to one of the ears 27 of the follower 26. When the follower 26 is placed upon the bar 14, and the springs 29 attached in the manner just described, it will be observed that staples placed about the bar 14 ahead of the follower 26 will be constantly urged toward the forward end of the magazine.
Means are also provided to maintain the cover or door 17 in either a full closed position or a full open position. To thisV end I provide a boss 30 at the rear end of the magazine. Within this boss 30 there is provided a bore 31. A member 32 is slidable Within this bore. The member has a button. 33 on its upper end which projects above the boss 30. The member 32 is recessed to receive a spring 34. A plug 35 forms a bottom rest for this spring. In this manner the member 32 is urged upwardly. The cover 17 is provided with a pair of indentations 36, one located at the forward end thereof and the other at the rear end. The bore 31 is so located that the member 32 extends slightly beneath the slot 1S in which the cover 17 is slidably positioned.
When the cover 17 is so moved that either of the inden tations 36 yis in registry with the Imember 32, such member will be forced upwardly within the bo-re and will engage within the indentation. This prevents further movement ofthe door 17. To release this catch one simply presses the button 33 so as to move the member 32 from engagement within the indentation. By these means I am able to secure the cover in either a full-closed position or a full-open position as desired. i v
In this magazine it will be observed that the members 10 and 11 are so located as to provide an opening 13 large enough to accommodate the pulleys 25A and the bar 14 lso thatvtlie staples 15 and follower 26 may straddle such bar without interference'. V l I l To load the magazine, the cover 17 is pulled backl until the indentation 36 adjacent the tit 19 registers with the member 32. This will hold the cover 17 in its` full yopen position. When the cover `17 yis pulled in this manner the portion 37 thereof, dened bythe slot 21, engages the button 2S of the follower- 26 and causes the follower to be pulled toward the rear end 1of theY magazine against the resistance of the springs 29. The opening 13 and bar 14- being thus exposed, a strip of staples 15 is placed about the bar 14 ahead of the follower 26. l The button 33 is then depressed and the cover 17 forcedto its home position `of closure as defined by the indentation 36 adjacent the linger portion 22. Because the button 28 is slidable within the slot 21, the cover 17 may move independently of the follower 26. rThis follower will be brought adjacent the last staple of the strip by reason of the action of the springs 29.
Another feature of my invention resides in that con struction which prevents the cover 17 being accidentally pulled completely from the magazine. Thus, should the member 32 fail to register with the indentation 36, the cover will nevertheless be stopped so that the operator cannot pull it free of the magazine. This is accomplished by reason of the fact that the follower 26 will abut against the pin 23. When the follower 26 is stopped by the pin 23, further movement of the cover 17 is impossible for the reason that the button 28 will be engaged by the portion 37 defined by the slot 21. The follower 26 and its button 28, therefore, prevent the cover from being pulled free of the magazine even though the member 32 should fail to register in the proper indentation 36.
It is a feature of my invention that if after a strip of staples has been placed upon the bar 14 there is `a staple or so which does not have its crown liush with the top of the bar 14, the beveled portion 20 of the tit 19 will engage any staple rising above the top plane of the strip of staples and force it into proper position. Were it not for the beveled portion 2Q of the tit 19 it is likely that the forward end of this tit would simply engage such a mispositioned stapie and the cover be prevented from Vfurther movement. By my arrangement, however, such staple is forced to its proper position and the cover may be, slid to its own position of closure easily.
The forward end of my staple magazine, generally indicated at 38, is adapted to abut the body of the staple gun or similar means for driving a'staple. In Figures 9 and kl() I have generally indicated the portion of the gun against which the magazine will abut at 39. Another f member 40 of this staple driving means cooperates with the member 39 to form a track or slot 41 in which a staple driver 42 will reciprocate. The body of the staple 'gun orsimilar means is provided with Van openrngh which leads to track or Yslot 41. it is `through this opening that the staples pass from the magazine into position within the track or slot 41 before the driver' 42. n
The larrangement of the magazine of my invention is such that the forward end 38 thereof abuts the gun or driving means as representedrby the member 39. 1n my arrangement, however, Athe bar 14 projects beyond the end 38 as indicated at 14a so that it extends within the opening 43 to a position ush with the bottom of the track or slot 41. Similarly, the tit 145 of the cover 17 extends through the opening Li3 to a position flush with the bottom of the slot or track 41. The normal arrangement is to have the cover 17 abut the member 39 in the same manner as the end 38 of the feed magazine.
This would create a crack. beneath which the staples would have to pass in order to reach the slot or trackY 4 1; Depending on how accurately the parts were machined and also on the amount and type of use to which the device was subjected, this crack would vary in size. It is possible that staples would rise up within this crack and cause jamming. By my arrangement, however, the cover 17 as represented by the tit 19, extends to the very place at which a staple is picked up by the driver 42. This means that the area adjacent the crowns of the strip of staples is uninterrupted by any crevice or the like. In this way I haye eliminated much of the jam; mir'ig difliculties normally associated with stapling devices of this general type.
In order to insure that the last staple of the strip is positively positioned within the slot 41, it will be observed that the distance between the forward part of the button 2E and the forward end of the follower 26 is the same as the distance between the end of the tit 19 and the area 37 of the cover 17. Thus', when the button 28 engages "the portion 37 the end of the follower 26 will be tiush with the end 14a of the bar 14 and the tit 19 of the cover 17. y v
It will also be observed that the slots 1S in the menibers 10 and 11 are so located that the cover 17 just clears the top of the staples placed about the bar 14. In this way the cover or door 17 serves as an upper guide sur# face `for the crowns of the staples and prevents buckling which might otherwise occur due to the force of the spring 29. It should be observed, see especially Figure 4, that the slot 21 Vin the cover 17 is not so wide as to permit the crowns of the staples to ride therethrough.
It will be understood that when the cover is pulled to its full open position, Vthe opening 13 and bar 14 will be exposed and there will be sufficient room to simply -place the strip of staples 15 about the bar. As described the follower 26 will be pulled out of the way by engagement of the portion 37 with the button 2S. It will also be observed that the slot 21, in addition to providing a suitable guide for the button 28 of the follower 26, enables the operator to determine at a glance how many staples are within the magazine. l
It will also be understood that while I have described my invention as embodied in certain specific structure, I do not intend to be limited to such structure except insofar as it is specifically set forth in the sub-joined claims. Obviously modications may bermade in this structure without departing from the scope and spirit of myrinvention. v
Having thus described my invention, what I claim as' new and what I desire to protect by United States Letters Patent is:
l. A staple magazine and feed structure for use with a stapling machine, said structure comprising a housing, a staple support bar fixed wtihin said housing and arranged to slidably retain a strip of staples thereon, a follower slidable on' said support bar for Vpushing 'said strip of staples in a forwardly direction on said support bar, a cover member mounted in said housing over said support bar and Slidable in a rearward direction to expose said support bar, and means for biasing said follower on said support bar in a forwardly direction, said lastmentioned means comprising a pair of extensible spring members each having one end spaced from said cover member and fixed within one end of said housing and a pair of pulleys spaced from said cover member and fixed within the other end of said housing, said support bar extending between said pulleys and said springs extending forwardly from adjacent the rear end of said housing around said pulleys and being connected at their other ends to said follower.
2. The magazine and feed structure of claim 1 in which said cover member has a portion thereof projecting beyond the forward end of said structure when closed,
of the drive track into which staples are fed by said structure.
3. The magazine and feed structure of claim 2 in which said projecting portion is beveled on its under side whereby the cover may easily be slid over staples which are not in proper depressed position on said support bar.
4. The magazine and feed structure of claim l in which said support bar extends beyond the end of said structure so as to pass through an opening in said stapling machine to a position ush with the bottom of the drive track into which staples are pushed by said follower.
5. The magazine and feed structure of claim 4 in which said cover member is provided with a slot intermediate its ends, said follower having a tab slidable in said slot, the distance between the front of said tab and the forward end of said follower being the same as the distance between the forward end of said slot and the forward end of said support bar when said cover member is closed.
6. A staple magazine and feed structure `comprising a base member having upstanding sides, a lstaple support bar fixed to `said base member, a cover member slidable in said upstanding `sides to expose said bar, a pair of pulleys each supported from a said side member at either side of said support bar and spaced from said support bar and from said cover, anchor means in said side members at either `side of `said bar and spaced from said cover, a staple follower slidable on 'said bar, and a pair of Vsprings each attached at one end to said anchor means yand at the other end to said follower, said springs lying on either side of said support bar and each spring passing over a said pulley, whereby said follower i-s urged 4along `said bar.
7. In a stapling machine a staple magazine and feed structure comprising a base having upstanding iside members, a stable support bar on said base, a cover slidable in said -side members above said support bar, said support bar being arranged to retain lslidably a strip of staples thereon, a follower slidable on said support bar for pushing said Istrip of staples in a forwardly direction on said lsupport bar, and means for biasing said follower on Isaid support har in a forwardly direction comprising a pair of pulley members fixed within Isaid housing adjacent the front end of said support bar one on either side thereof and spaced lfrom `said cover, each of said pulley members lying in a plane vspaced transversely of `the plane of said support bar, a pair of extensible spring members each anchored at one end within said housing adjacent the rear end of said support bar one on either side thereof and spaced from vsaid cover, each Isaid spring means extending forwardly from said `anchored end around a said pulley member and secured at its opposite end to said f-ollower.
8. A staple magazine and feed structure comprising a base having upstanding Isides integral therewith, a cover slidable in lslots provided in `said sides, a staple `support; bar xed to said base beneath said Vcover and between said sides, a `staple follower slidable on said bar, pin means in said sides at the rear end of rsaid structure, a pair of pulleys at the `forward end of said structure one on either side of said bar, said pulleys being mounted on lsaid sides, and a pair of springs one on either -side of said bar, each spring being fastened at one end to said pin means, passed around a said pulley, and fastened at its other end to said follower.
9. The device `of claim 8 in which said cover is slidable between an open and `closed position and including detent mean-s to hold it releasably in either position, said cover and follower having cooperating abutmcnts by which the follower is pulled to the rear of Isaid bar when said cover is moved `to its open position whereby staples may be placed on said bar.
References Cited in the le of this patent UNITED STATES PATENTS 2,585,942 Juilfs Feb. 19, 1952