US1675779A - Clincher for wire-stapling machines - Google Patents

Description

July 3, 1928. 1,675,779

H. G. ALLEN CLINCHER FOR WIRE STAPLING MACHINES Filed July 17, 1926 Patented July 3, 1928.

UNITED STATES PATENT OFFICE.

HOWARD G. ALLEN, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO. MORRISON STITCHEB CORPORATION, OF NIAGARA FALLS, NEW YORK, A CORPORATION OF NEW Your.

Application filed July 17,

This invention relates to the clincher of a stapling or stitching machine whereby staples or stitches of wire are applied to pamphlets, books and the like for holding of paper or other material these legs do not always travel in straight lines and often comev out at different distances from the center line of the staple and the ends of these legs are often clinched so that they are arranged at an angle to the center line of the staple and therefore produce an unfinished and unsightly ap earance. This is due to conditions hereto ore beyond the control of the stapling or stitchin machine, such as uneven reeling of the wire on the spool or coil and the quality of the wire, all of which produce a variation in the driving capacity of the wire staple. Experience also shows that the straightness with which wire will be driven de nds a reat deal on the condition of the ives w ioh sever the wire in lengths suitable for making the staples, inasmuch as the knives when dull produce either a bevel or frayed out and this causes the legs of the staple when passing through a pad of material to leave off to one side of the center of the staple.

Heretofore each of the clincher blocks in stapling machines has only been provided on, its face with one longitudinal guide groove the walls or sides of which are inclined or beveled and this roove served to direct the oint or end a staple leg after it assed through the pad of material toward t e center line of the sta le with the result that often the sta le e'n s would be inclined or arranged ob iquely or twisted out of shape and therefore lacked neat-ness in appearance. a

It is the object of this invention to pro: vide a clincher for stapling machines which will cause the ends or points of the 'le after passing through the material to be c inched or bent against the material in a direction parallel with the center line of the staple and thus present a better appearance.

To that end this invention consists in ,providing each block of the clincher with a plurality of guide grooves any one of which s adapted to receive the point or end of a cnmqnnn FOR wmn-s'rarnme mcnnvns.

1926. serial No. 123,221.

staple leg and bend the same parallel with the center of the staple.

In the accompanying drawings: a i

Figure 1 is a top plan view of a clincher embodying one form of my invention. a

F gure 2 is a side elevationthereof with one side plate or Wall of the clincher box removed. 1 e

Figure 3 is a vertical section taken on line 33 ofFigure 2. i j

'Figure 4 is a vertical cross section, on an" enlarged scale, of one of the clincherblocks or jaws provided with three guide grooves corresponding to Figures 1 and 3; 1

Figure 5 is a vertical longitudinal section of a pad of material and the stapledriving and chnching mechanism of a stapling mach ne in elevation showing the manner of drivingthe legs of a staple through a pad ofmaterial and turning over or bending the legs against the material inaccordance with my 1I1V8I1t1011.

Figures 6, 7, 8 and 9 represent fragmentary. bottom views of a pad showing the manner in which the ends or points of the staple legs are bent or turned parallel with the center of the staple by the use of my inventions Figures 10, 11 and 12 are vertical crosssections through a pad and a clincher block showing the manner in which the points or ends of the staple legs are turned into paraL. lelism with the center of. the staple corre sponding to the position of the parts shown lnFig'ures 6, 7 and 8.

Figures 13, 14 and 15 are bottom views showing different forms of the staple ends relative to the center of the staple when applying the same to material by the means heretofore employed. a e

Figure 16 is a vertical section similar to Figure 4 but showing five guide grooves on the face of the clincher block.

Similar characters of reference indicate like parts on the several views of the drawings.

Although this invention is applicable to machines for stapling or stitching together two various kinds of materials by means of wire staples the same is shown in the draw in gs in connection with a pad or pile of superposed sheets or layers "20 which are connected by a U-shapedwire staple having its legs 21, 21 passing throughfthis pad, a q

50 v r and engages with notches iormed' on the cross bar 22 connecting the upper or rear ends of said legs and engaging the real or upper side ofthis pad, and two points, ends or toes 23, 23, arranged at the lower or front ends on the legsamt bent: or turned against the underor front. side oi asshawu in Figure 5.

The staple driving mechanism maybe oi any suitable construction and is represented generally in the drawings by the vertically homovable driver or hammer 24; which is adapted to engage with the cross bar of thestaple and push or force its legs through the pad of material untilthe cross bar rests against the rear or top side of the pad as shown in Figure 5.

After the legs ofthe staple have been thus driven through the pad their points, ends or toes are bent toward each other and ressed against the lower or front side of t e pad 7. by a'clincher mechanism which also may be filling pieces 28', 28 arranged between the corresponding ends of the side plates and screws 29, 29 connecting said side plates and filling pieces.

The clincher blocks are pivoted at their outer ends onthe side plates by means of horizontal pivot pins 30, 30 so. that the. inner ends of these blocks can swing vertically. \Vhen the legs of the staple emerge "fromthe under side of the pad of the material they engage the clincher blocks which are in their lowered position as' shown in Figure 2 and are turned or 'hent toward each other and: thereafter the clincher blocks are raised and operate to press the points or ends of the staple legs against the underside of the pad", as shown in Figure 5. The raising and lowering of the clincher blocks is efiected by a T-shapedf lifter 31 which is guided in a slot 32 in the lower part of the clincher box opposing inner sides of the clincher blocks and a vertically movable ush rod 3 f on which said litter is mountedi In the clinchin devices as heretofore constructed each bloch was rovided on its upper side or face with a singe longitudinal "de groove, the guide grooves of both h" cks being in a li'nement. If therefore the legs of a sta le were both driven straight through the andfengaged the guide grooves of the respective clincher blocks then the ends or points of these. legs would? be folded, bent or turned properly toward each other into a position parallel and vertically in line with the longitudinal center of the staple which- I'ine is represented iy the cross bar of the staple, as shown in Figures 6 and 10. If however one leg of the staple would be diverted. iron a straight path imprnetrating the. pad its point or and 11pm emerglng from the underside of thecpaab maybe defleeted by thegu-id'e groove in the respective block toward the center line of the staple and thus' assume an angular position, as shown in F igurel'3. In some instances botlrlags of the staple ma be divertedfrom a'stra-ight path! through t'li which case both' oints or ends of the'staple' may he cleflecte by the ruide grooves of the clincher blocks towar the center line of the staple and thus assume angular posi:

tions, as shown in Fi ure 14. Or the legs of the staple may be diverted in op osite directions from the center line of t e staple and their ends or points may be deflected back toward this line by the'gui'de grooves of the clincher block u on emerging from the underside of the pa as shown in Fig;

ure 15. In some instances the points of'thef legs may miss the guide grooves ofthe clincher blocks in which case those points would be turned over by the flat surfaces of the block in a more or less twisted form.

When the points or end's of the staples are thus arranged in an angular or twisted formrelatively to the center line oft he fstaplethe work presents an unfinished and de 'ect'i'vef' appearance which is unsatisfactory to the trade and is the cause of rejecting work which is otherwise acceptable;

To avoid this the present invention provides each of the clincher blocks withla lura-lity of guide-channels or grooves w ich are arranged lengthwise of these blocks and; parallel with each other and the grooVes'in one block being in line with corresponding grooves in the other block. 1 These} grooves are preferably of an odd number andcomprise a central or'main groove and one or e pad and the same di j rection from the center line ofthe staple in If the legs of astaple alliedrjven 's'trai'gl'it through the'padthe oints or ends oi the same hoth enterthe 'main'celltlt'a'l groove 35 and are foldled hent or turned towardeach other arallel' with each other andthe center line 0 the sta le represented by its cross her,

- as shown in igures 6 and I0; lfone'of ithe legs shouldbe diverted from a straight path in penetrating the ad, its point or end on; emerging from the luldersitle of the pad will engage the respective auxiliary guide groove 36, as shown in Figure 11, and be bent or turned thereby into a position in which this end is parallel with but ofi-set from the turned end or point of the other leg of the staple, as shown in Figure 7. If both legs of the staple are diverted away from opposite sides or the center line of the staple the points of the same will engage with the auxiliary guide grooves on opposite sides of the central or main groove, as shown in Figure 12 and then be bent or turned toward each other on the underside of the pad so that the same are off-set but arranged parallel with each other and with the cross bar of the respective staple, as shown in Figure 8. In some instances both legs of the staple may be diverted laterally from the-same side of the staple center line in which case the ends of the same upon emerging from the underside of the pad will engage with corresponding auxiliary grooves of both clincher blocks and be turned thereby into a position in which they are in line with each other and parallel with the center line of the staple as shown in Figure 9. i i

If desired more than three guide grooves may be employed, for example, as shown in Figure 16, each clincher block may be provided with a main central guide groove 35 and two auxiliary grooves 36 on opposite sides ofthe main groove.

In order to cause the ends or points of the staples to aline themselves properly in the guide grooves upon entering any portion thereof these grooves are made V-shaped in cross-section, as shown in Figures 4, 10, 11, 12 and 16 so that the sides or walls are inclined and deflect the staple ends toward the center of the respective groove.

The summits or walls between adjacent guide grooves in each clincher block are very narrow so as to prevent the points of the staple legs from resting thereon, but in order to prevent such summits from presenting too sharp an edge and wearing rapidly these summits are flattened, as best shown at 37 in Figures 1, 4, and 16. In practice it is pref erable to make the flat faces on the summits of the walls between the guide grooves no greater in width than about one-third of the width of the grooves at the top thereof, thereby preventing lodgement of the staple ends on such summits and insuring good work.

In all of these several results the ends or points of the staple legs are parallel with each other and the length of the staple thereby maintaining a well finished and satisfactory appearance of the work and increasing its value accordingly.

I claim:

1. A clincher for wire stapling machine provided on its face with a plurality of guide grooves arranged parallel and lengthwise of the clincher, each of said grooves being of the same V-shape cross-section throughout its length and the summit of the walls between adJacent grooves being flat and of the same width throughout the length thereof.

2. A clincher for wire stapling machine

Images