US2655655A - Fastener-inserting machine - Google Patents

Description

Oct. 20, 1953 w. A. BARKER 2,655,655

F ASTENER- INSERTING MACHINE Filed March 8, 1952 4 Sheets-Sheet 1 [IE7 ven for"v Oct. 20, 1953 w. A. BARKER 5 ,6

FASTENER-INSERTING MACHINE Filed March 8, 1952 4 Sheets-Sheet 2 I Inventor W'z'lll'am A.Bar'/ e/" By his'Azzor-n sy Oct. 20, 1953 w. A. BARKER EASTENER-INSERTING MACHINE 4 Sheets-$heet 3 Filed March 8, 1952 53 hzs Attorney Oct. 20, 1953 w. A. BARKER 2 ,655,655

FASTENER-INSERTING MACHINE Filed March 8, 1952 4 Sheets-Sheet 4 lnvenlor Patented Oct. 20, 1953 'FASTENER-INSERTING' MACHINE William Arthur Barker, Leicester, England, as.-

signor to United Shoe Machinery Corporatiom, Flemingtoin. N; .L, a corporation of New Jersey Application March 8, 195.2, Serial No. 275,499 In. Greatv Britain March 21., 195-1 16 Claims. 1

This invention relates to fastener-insertin machines, and is herein illustrated as embodied in a. machine for inserting fasteners in. shoes of the type disclosed in United States Letters Patout No. 1,815,295,, issued on July 21, 1 931, in the name of George Goddu, It will, of course, be understood that the various features. of the invention are not limited to use in machines of the exact mechanical construction shown inv the Goddu patent or in machines for inserting fasteners in shoes.v

Machines of the type disclosed in the Goddu patent comprise a driver for driving fastenings, such as; staples, from a so-called nozzle through the shoe upper and into an insole, to fasten the upper to the insole, and a deflector for engaging the legs of each staple to curve different portions of the legs successively in the driving operation before the different respective portions enter the shoe and thus to cause them to follow curved paths such as. to anchor them effectively in the insole without necessarily penetrating entirely through the latter. In such machines, the driver moves relatively to the deflector at an inclination to that face of the. work into which the staple is driven, and the driving stroke of the driver terminates substantially at the time when the crossbar of the staple is engaged by the deflector. As a result, it sometimes happens that one or more of the staples. are not driven as far into the: work as is desired, particularly when operating on. some kinds. of shoes.

It has, accordingly, been. previously proposed to correct this situation by providin means. for cites-ting relative movement of the staple. driver and deflector, near the end of the operating movement of the deflector, to cause the driver to drive the staple fully into. the work and to embed its crossbar in the work. Thus, as is disclosed in United States Letters Patent No. 2,2d2,423, issued, on May 20,. 1941, in the names of Harold E. Elliott and Lawrence Mawbey, means have been provided for imparting to. the driver, at, a predetermined time in its operating stroke and substantially when the. crossbar of the staple is engaged by the deflector, a dipping movement about an axis extending laterally of the driver in a direction to cause its staple-engaging end to move heightwise of the deflector, toward the work, the axis of dipping, movement being so located as to cause the staple-engaging end of the driver to move in. a path substantially parallel to the deflecting face of the deflector. The driver thus, continued engagement with the staple, acts to force the curved legs of. the staple fully into the work and. to embed the crossbar o1v the staple in the work. More articularly,, as. disclosed in the last-mentioned. patent, the stapleguiding nozzle, or driver slide, has. been. pivotal.- ly supported on a slide, which. carries the. stapleforming and driving. parts and a linkage. mechanism, includin a plurality of links. and levers, has. been utilized for angularly displacing. the staple-guiding nozzle to impart the aforementioned dipping movements to the driver, It has been found, however, because of the spring. of the various elements of the linkage mechanism and/or wear of the pivots oi the driver-dipping means, that. the arrangement previously proposed for dipping the staple driver does not always produce the desired result, 1. e..,. a complete embed-- ding of the crossbar oi the staple in the work. In this latter connection, it may be pointed. out that the actual extent of dipping. movement of the driver is extremely small, bein of. the magnitude of .040", so that relatively slight spring of the parts and/or wear of the pivots. has. a. disproportionately great efiect on the driving of. the staples by the driver.

It is, therefore, an object of this. invention, to provide in the fastener-inserting machine of the type here. under consideration, a novel. and improved staple-driving, and driver-dipping mechanism which is more dependable in operation than the arrangement previously proposed. Thus, in the herein illustrated machine, the nozzle, or driver slide, is carried by a bracket member. which is mounted on the main slide of the machine by means includinga link and a leaf spring, for bodih movement relatively thereto, in a substantially rectilinear path generally parallel to the face of the deflector, so that it is held firmly against undesired lateral deflecting movements, relatively; to this main slide, and mechanism including an eccentric is provided for moving this bracket member, to dipthe slide, which is considerably less subject tov objectionable. spring or wear.

In machines of the typev disclosedin. the aforementioned patents, the curvature of the staple legs may be varied, to. suit different operating conditions, by moving the staple deflector, about a pivotal support, toward. or away from the end of the throat member, through which the staple is driven by the driver. Such movement of the deflector also varies. the anglebetween the operating face of the. deflector and the path of movement of the driver. The driving stroke of the driver is suchthat its driving movement terminates with the driver nearly touching the lower edge of the deflector, when the deflector is adjusted to produce staples of the smallest radius of curvature. Hence, when the deflector is adjusted to produce staples of a larger radius of curvature, there will be a greater gap between the driver and deflector. when the driver terminates its driving stroke. Under some circumstances. i. e., when staples of the largest curvature are being inserted, this gap may be sufiicient to permit the head, or crossbar, of the staple to spring upwardly, as it emerges from the throat, above the driver, thus causing the end of the driver to pass beneath the head of the staple without embedding it into the work. In any event, the gap which exists when staples of any but the smallest curvature are being driven, is sufficient to prevent the driver from properly embedding the head, or crossbar of the staple, into the work.

It is, accordingly, another object of this invention, to provide in a machine of the type here under consideration, an arrangement for eliminating the aforementioned difficulties. Thus, in the herein illustrated machine, the staple deflector is fixed, relatively to the operating stroke of the driver, and the curvature of the staples is varied by adjusting the throat member toward or away from the deflector. More particularly, the fixed deflector is so located, relatively to the staple driver, that there is substantially no gap between the operating face of the deflector and the end of the driver, at the termination of the driving stroke thereof, and means are provided for displacing the throat member, through which the staples are driven, toward or away from the deflector, the arrangement being such that the maximum gap between the throat and deflector is less than the diameter of the wire out of which the staples are formed. Accordingly, regardless of the curvature of the staples which are being driven, it will be impossible for the driver to pass beneath the head, or crossbar of the staple, and hence the heads of all staples will certainly be embedded within the work.

In fastener-inserting machines of the type disclosed by the aforementioned patents, the staples are formed in a remote location and then transferred downwardly. through a channel, one part of which is in an outside former and another in members which are associated with the throat through which the staples are driven. Thus, it sometimes happens that the legs of a staple, which have a tendency to spring apart, become caught in the fissure between the lower side of the outside former and the upper sides of these members, with the result that the staple transferring member jams in the channel. It is, therefore, a still further object of this invention to provide an improved staple-forming and transferring mechanism which avoids this diniculty. Thus, in the herein illustrated machine, the stapletransferring channel has unbroken side walls, extending from a point where the staples are formed downwardly to the location where the staples are driven. More particularly, the throat member of the herein illustrated machine comprises a pair of side plates and a spacing plate and the stapletransferring passage is formed by one edge face of the spacing plate and the side faces of the side plates and the staples are formed in the upper portion of this channel by means of a movable inside former, and then transferred downwardly therein by means of the usual staple-transferrin member. Inasmuch as the walls of this cha ne are unbroken, it is impossible for the staples to catch and thus jam the transferring member.

Thes and other objects of the invention will appear in the following detailed description of the preferred embodiment thereof, which is illustrated in the accompanying drawings, and will be pointed out in the claims.

In the drawings,

Fig. l is a perspective view of a portion of a fastener-inserting machine embodying the features of this invention;

Fig. 2 is a view in side elevation, and at an enlarged scale, of the machine shown in Fig. 1;

Fig. 3 is a view in side elevation of certain of the operating elements of the machine with some of the parts omitted and others shown in vertical section;

Fig. 4 is a view in plan of the operating elements shown in Fig. 3, with certain parts in sec tion;

Fig. 5 is a view in side elevation, and at an enlarged scale, of other operating elements of the machine shown in Fig. 2 as viewed from the opposite side of the machine;

Fig. 6 is a view in plan of the operating elements shown in Fig. 5, with certain parts in horizontal section; and

Fig. '7 is a view in elevation of the operating elements shown in Fig. 5 with certain parts in vertical section.

Referring to these drawings, the machine therein illustrated is generally similar to the fastener-inserting machine disclosed in the patent to Goddu, referred to above, and as will be apparent, Fig. 2 of these drawings corresponds generally to Fig. 4 of the drawings of the Goddu patent. Thus this machine has a lasting gripper, not shown, and a main slide I (corresponding to the slide referred to as 72 in the Goddu patent) which is arranged to slide forwardly and downwardly in the machine, prior to each staple-driving operation, in a direction to cause a staple deflector 3 (corresponding to the deflector referred to as 210 in the Goddu patent) which it carries, to urge inwardly over the margin of an insole I on the bottom of a last L within a shoe upper U. a portion of the upper which has been previously tensioned by the gripper, the slide then being rocked downwardly to cause the deflector to press said portion of the upper more firmly against the insole before the driving operation takes place. In addition to carrying the staple deflector, the main slide l carries staple forming, stapl transferring and staple-driving mechanisms, which are, except as noted below, similar to those of the Goddu patent. The arrangement is such that after the formation of each staple, a transferring member 5, Figs. 2 and 3 (corresponding to the transferring member referred to as 136 in the GOddu patent) carries it downwardly into the path of a downwardly and rearwardly moving staple driver I by means of which it is driven against a staple-deflecting face 9 of the deflector 3 before the legs of the staple actually enter the work, the said deflecting face serving to curve the legs of the staple progressively forward so that, as they pass through th upper and into the insole, they curve upwardly Within the work toward the face of the work which they penetrate when entering it, in the manner explained in detail in the Goddu patent.

For the purposes of this invention, the driver guide member is carried by a bracket II which is slidably mounted on the main slide I, which in the herein illustrated machine is bifurcated at its assume forward end tor this. pmpcse. The slidingbracket II is secured; near the upper end thereol. by clamping plates: 1:3: to; forwardly projecting portions of a leaf spring I5. The. rearward and portion of this: spring is attached, by means of a clamping plate I1, to a horizontal face. provided on the upper portion of the main. slide. I, so that the sliding bracket is resiliently supported for slight upwardand' downward movements, relatively to the main slide, see- Fig. 2. A lower end portion of the bracket I I extends rearwardly'and downwardly to form a pivotal connection tothe rearward end portionv of a relatively short I9, the forward end portion of which is pivoted on the outside of an eccentric bushing 2| which is journaled on a stud 2-3, Figs. 3 and 4, carried by a bracket fixed on a lower portion of the main slide I, Fig. 2-". Thus the bracket H is supported at its upper end by the leaf spring I'5- and at its lower endby the link I9 and the pivots of this link are so related that, as the'bracket H is moved upwardly or downwardly, as hereinafter described, the actual direction or movement of the bracket is not vertical but is inclined at some 14" thereto rearwardly and downwardly for a purpose which will presently appear:

The sliding bracket II also projects forwardly and downwardly to carry a driver gui-d'eway bracket 21" which is positioned thereon by tongue and-groove locating means and is secured thereto by screws 29', Figs. 2 and 3 (the guideway bracket corresponding to the members referred to as 160 in the Goddu' patent). With the exception of the. provision of the sliding bracket I I the staple-driving parts of the herein illustrated machine are similar to those 01' the Goddu patent and include a bell-crank lever 3I, a driveroperating lever 33,, a driver block 35,. a driver slide 31 and the driver 1' (these parts corresponding to the parts referred to in the Goddu patent by reference characters 174, 164.,v 1'68, 158 and 128), the

driver 1' of the herein illustrated machine, however, being rectangular in cross section.

Also carried on the same forward and downward. projection of the sliding bracket I I is the throat 39, Figs. 2. and 3 for guiding staple during the driving operation. For convenience of manufacture, this throat comprises left and right-hand side plates 40, 4'0, a spacing plate M, Fig. 4, and a dovetail plate 43 which .forms the lower surface of the staple guideway 42', Fig. 3. This dovetail plate. is held in position by a clamp. plate, having an. angular groove which, in cooperation with. an angular groove formed. near the lower edge of the left-hand side plate, completes the dovetail in which the dovetail plate is secured. The upper edge of the rearward end. of the dovetail plate (1. e., that part of the plate which lies closest to. the deflector) constitutes a fulcrum about which the legs. of the staple, are subsequently bent by the action of the deflector. Inasmuch as any small inconsistency in the position of that edge. may bring about appreciable variation in the. radius. oi curvature of. the. staple legs, the dovetail plate is thus clamped so that it can readily be set initially in the position desired and replaced in such position, after removal for grinding on the end to compensate for wear. The lower face of the spacing plate M is arranged to be at a distance from the upper side of the dovetail plate whichv is only slightly greater than the diameter of the wire out of which the staples are formed, and the width of the spacing plate is only slightly greater than the width of the staple so that the staple may bemoyedalong the 6 It by the. driver I but is not able to turn therein. The guideway 4.2. and the driver slide. 81 areinclined downwardly and rearwardly at an angle of approximately 30 from the horizontal, Figs. 2' and. 3;

An upwardly extending. rear edge face of the spacing plate 4 I:,. in conjunction with. rear portionsof the side: plates, 40. 4.0... forms a rectangular channel 44, Fig; 4;.open to-the rear, in the. upper portion or which. staples. are termed, the wirefeeding and shearing mechanisms of the. herein illustrated machine. being. similar to those described in the Goddu patent. However, whereas in the machine. described in the Goddu patent, the staples are. formed by the movement of the main slide I. carrying the wire toward a relatively stationary outside. former, in the herein illustrated machine, the staples are formed by a movable. inside former 45, Fig. .3, which forms the staples againstthe unbroken walls of the rectangular channel 44, referred to. above, which ex:- tends from the location in which the staples are formed downwardly to. the. guideway 42 from which they arev driven into the work, leaving no gap or fissure, inwhich. the staple legs might. becomecaught. For thus operating the. inside former, there is journaled in the sliding. bracket II a. headed spindle 41 to which the inside former, which extends downwardly, is attached by screws 48, Fig. 3, and located thereon by a tongue and groove; see "Fig. 4. 0n the right-hand end of the spindle 41 there is fixed an upwardly extending arm 49, Figs. 1 and 2, the upper end portionof which is pivotally conected to a rearwardly extending link 5| which is pivoted at its rearward end to a forward end portion of a main slide-supporting member 53 (corresponding to the supporting member referred to as 70 in the Goddu patent). By this means, as the main slide I moves forwardly, the upwardly extending arm 49 is moved rearwardly, thereby causing the inside former to swing forwardly, about the axis of the spindle 41, until the inside former enters the upper part of the staple channel 44, which serves as an outside former, to form the wire W, which has previously been sheared, into a staple. The lower edge 50 of the inside former 4-5 is of a stepped configuration which is complemental to the upper edge of a filler block 52, Fig. 3. Thus these parts fit together snugly, after the staple has been formed, so that no gap or fissure is'lert on which the staple could catch as it is later transferred downwardly into driving position. The filler block 52 is cut away at '54, see Fig. 3, and the operating end of the deflector 3' fits into the space thus formed between the side plates 40, 40, F1g. 2.

The position in which the staple is formed is at. some distance above the position which 0ccupies, when it is driven and the staple is transferred downwardly along the channel 44 and. into the driver guideway 42., with which that channel communicates. The mechanism for transferring. the staple downwardly into its driving position comprises the transferring member 5 which is shaped to embrace the inside former 45 and the filler block 52 and is housed in the sliding bracket I.I,. being therefore carried forwardly by the main slide I during the staple-forming operation. The. transferring member 5 is fastened at its upper end to a rod 55 which is vertically movable in a bushing 55, fixed in the upper end portion of a vertical bore in the sliding bracket, Fig. 3. A coil spring .58 surrounds. this rod and enases. at lower end, a shoulder 5.1 on the rod,

adjacent to the transferring member and, at its upper end, the underside of the bushing 56, thus urging the transferring member in a downward direction. Fixed on the upper end portion of the rod 55, which projects upwardly through the bushing 56, is a cross head 59, Fig. 2, from which there projects downwardly, into a guide slot 60 formed in the sliding bracket I I, a pin GI which prevents the rotation of the rod 55 and thus insures that the transferring member is in alinement with the staple-forming channel 44. The crcsshead 59 also carries a downwardly projecting adjusting screw 53, the lower end of which abuts on a stop face 65, formed on the sliding bracket. By adjustment of this screw, the lowermost position of the staple-transferring member 5 may be regulated. The underside faces of two lugs 65, 66, extending laterally on either side of the crosshead 59, abut a bifurcated forward end portion of a lifting lever 61, which straddles the aforementioned rod 55, see Fig. 1. The lifting lever is pivoted, at its rear end, on a screw 68, threaded horizontally into a boss portion provided on the main slide I, Fig. 2, and is pivotally connected, approximately midway of its length, to the lower end portion of an upwardly extending link H, the upper end of which is pivotally connected to the arm of a bell-crank lever 13 (corresponding to the lever referred to as M6 in the Goddu patent), the other arm of which is provided with a follower roll engaged by a peripheral cam, not shown (corresponding to the cam 150 of the Goddu patent). By this means, a raised portion on the cam periphery causes the staple-transferring member 5 to be elevated, against the resistance of the spring 53, which, when the follower roll engages a low portion on the cam, causes the transferring member to move downwardly to transfer the staple to its driving position.

For the purpose of moving the sliding bracket II, to cause the driver mechanism to be lowered as the driver 1 is driving the staple into the work and is approaching the end of its driving stroke, the driver-actuating lever 3| is provided with an arm which extends rearwardly and carries a cam follower roll 11, Fig. 2. This roll engages a cam slot 19, formed in a lever BI, hereinafter referred to as a cam lever, which depends from a pivot 83, carried by the main slide I. The cam slot 19 is so formed that, as the driver-actuating lever 3I moves to cause the staple to be driven by the driver 1, the rearwardly extending arm 15 of said actuating lever, when almost at the end of its movement, causes the cam lever 8| to swing rearwardly about its pivot 83. A forwardly extending lug formed on the lower end portion of the cam lever 8|, carries a pivot 85 to which there is connected the rearward end of a forwardly extending link 81. The forward end of this link is pivoted to a downwardly extending arm 89 which is fixed to a laterally extending eccentric shaft 9| journaled in the main. slide I, on the eccentric portion 93 of which a rectangular block 95 is supported. This block engages, on its upper and lower surfaces, a forwardly extending fork 95, formed on the sliding bracket I I, see Fig. 2. The eccentric portion of this shaft is so arranged that, when rearward movement of the cam lever 8I occurs, causing the downwardly extending arm of the eccentric shaft to swing rearwardly, the sliding bracket is caused to move downwardly, this movement being substantially rectilinear but not vertical. Instead the bracket member actually moves downwardly and rearwardly along a path inclined some fourteen degrees from the vertical, because of the action of the short link I9, mentioned above. The purpose of this inclined movement is to cause the end of the driver 1, as the driver mechanism is thus dipped, to move downwardly in a direction substantially parallel to the deflecting face 9 of th staple deflector 3 which, in the herein illustrated machine, is not angularly adjustable, as in the machines of the aforementioned patents, but is fixed to the bracklet member 25 which is carried by the main slide In the herein illustrated machine, the variation of the staple curvature is effected by moving forwardly or rearwardly the sliding bracket II, which carries, among other things, the throat member 39. Such movement of the sliding bracket increases or decreases the distance between the outlet end of the staple guideway 42, in the throat member 39, and the deflecting face 9 of the deflector 3 and is effected by rotating the eccentric bushing 2| to which the sliding bracket I I is connected by means of the link I9. For this purpose, a flange 91 is formed around the mid portion of the eccentric bushing 2I and to this flange an upwardly extending arm 99 is attached, see Figs. 6 and '1. A handle member IN is assembled on the portion of the bushing 2| which is opposite to that on which the short link I9 is pivoted, and this handle is provided with an arcuate slot I03, Fig. 5, through which a screw I00, fixed in the arm 99 on the eccentric bushing 2 I. passes and carries a thumb nut I02. By this means, the angular relationship of the handle IM to the eccentric bushing 2I may be altered. Formed on the handle member IOI is an arcuate projection I05 in which a notch IE5 is provided. This notch is adapted to be engaged by a plunger I01, carried by an arcuate bracket III, fixed to a bracket I I3 which is, in turn, mounted on the bracket 25. The shape of the plunger I01 and notch I65 is such that a stop is formed in one direction and limits the movement of the handle IOI forwardly, while the plunger does not prevent the handle from being moved rearwardly. The arcuate bracket II I is provided with a dovetail groove I I5, Fig. 7, in one end of which a stop plate H1 is secured by a screw II9, Fig. 5. The stop plate I I1 limits the movement of the handle in a rearward direction. Adjustably mounted in the dovetail groove II5 is a block I2: which carries a spring plunger I23 having a frusto conical end portion I22 which is adapted to engage a countersink I24 in the arcuate projection I06. The position of this countersink is such, however, that it is not engaged by the plunger I01 when the handle member I0l is moved. Thus, the spring plunger I23 forms an adjustable intermediate stop for the handle. By this means, the eccentric bushing 2I may be quickly adjusted to vary the position of the end of the throat member in relation to the deflector. By releasing the thumb nut I02 and moving it relatively to the arcuate slot I03, the handle member IOI may be moved relatively to the eccentric bushing 2I and the range of adjustment thus changes. It is, therefore, very easy for the operator to change the staple curvature as the machine is being operated, within the range previously determined by the position of the thumb nut.

The arrangement just described, allows the throat 39 to be moved relatively to the deflector 3, to vary the curvature of the staple without, however, altering the distance between the end of the driver 1 and the deflector, the driver, in all positions of the throat, following through substantially to the deflector and tracking down its inclined deflecting face 9, constantly remaining too close to this deflecting face to permit the head of the staple pass between it and the deflector, and finally coming to rest on the surface of the work. The staple head is thus unable to escape between the driver and the deflector and, therefore, must necessarily be driven into the work and embedded the-rein by the driver. As suggested above, the mechanism for adjusting the throat member 39 toward and away from the deflector 3 is so arranged that the maximum gap between the outlet end of the staple guideway 42 in the throat member, and the opcrating or deflecting face 9 of the deflector 3 is slightly less than the diameter of the wire out of which the staples are formed. Hence, the crossbar, or head, of the staple cannot spring upwardly, as it emerges from the throat member.

Having described the invention, what is claimed as new and desired to be-secured by United States Letters Patent is:

1. A fastener-inserting machine having, in combination, a main slide, a deflector carried by said slide and provided with an operatin face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, a bracket member on which said throat member and said staple driver are mounted, means for supporting said bracket member on the main slide for bodily (movement, relatively thereto, in a substantially rectilinear path generally parallel to the operating face of said deflector, means for operating said driver, and mechanism, actuated by said driver-operating means, for effecting bodily movement of said bracket downwardly toward a workpiece, near the end of the operative stroke of the driver, to cause the operating end of said driver to track down the operating face of the deflector and embed the crossbar of the staple in the workpiece.

2. A fastener-inserting machine having, in combination, a main slide, a deflector carried by said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by' said driver, a bracket member on which said throat member and said staple driver are mounted, means including a link for supporting said bracket memher on the main slide for bodily movement, relatively thereto, in a substantially rectilinear path generally parallel to the o 'oerating face of said deflector, means for operating said driver, and mechanism, actuated by said driver-operating means, for effecting bodily movement of said bracket downwardly toward a workpiece, near the end of the operative stroke of the driver, to cause the operating end of said driver to track down the operating face of the deflector and embed the crossbar of the staple in the workpiece.

3. A fastener-inserting machine having, in combination, a main slide, a deflector carried by said slide and provided with an operating face for engaging and bending the legs of a Staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, a bracket member on which said throat member and said staple driver are mounted, means including a pivoted link and a leaf spring for supporting said bracket member on the main slide for bodily movement relatively thereto, in a substantially rectilinear path generally parallel to the operating face of said deflector, means for operating said driver, and mechanism, actuated by said driver-operatingmeans for effecting bod ilymovement -=of said bracket downwardly toward a workpiece, near the end of the operative stroke of the driver, to cause the operating end of said driver to track down the operating face of the deflector and embed the crossbar of, the staple in the workpiece.

4. A fastener-inserting machine having, in combination, a main slide, a deflector carried by said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, a bracket member on which said throat member and said staple driver are mounted, means for supporting said bracket member on the main slide for :bodily movement, relatively thereto, in a substantially rectilinear path generally parallel to the opera'ting face ofsaid deflector, means for operating said driver, and mechanism, including an eccentric operatively connected between said bracket and said slide, actuated by said driveroperating means, for effecting bodily movement of said bracket downwardly toward a, workpiece, near the end of the operative stroke of the driver, to cause the operative end of said driver to track down the operating faceof the deflector and embed the crossbar of the staple in the workpiece.

5. A fastener-inserting machine having, in combination, a main slide,-:a deflector carried by said slide and provided with an operating ,face for engaging and bending the legs of a-staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, a bracket member on which said throat member and said :staple driver are mounted, means including :a link for supporting said bracket memher on the main slide for bodily movement, relatively thereto, in a substantially rectilinear path generally parallel to the operating face of said deflector, means for operating said driver, and mechanism, including an eccentric, operatively connected between said bracket and said slide and actuated by said driver-operating means, for effecting bodily movement of said bracket downwardly toward a workpiece, near the end of the operative stroke of the driver, to cause the operative end of said driver to track down the operating face ofthe deflector and embed the crossbar of the staple in the workpiece.

'6. A fastener-inserting machine having, in combination, a main slide, a deflector carried by said slide and provided with an operating face for engaging. and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, a bracket member on which said throat member and said staple driver are mounted, means including a pivoted link and a leaf spring for supporting said bracket member on the main slide for bodily movement, relatively thereto, in a substantially rectilinear path generally parallel to the operating face of said deflector, means for operating said driver, and mechanism, including an eccentric operatively connected between said bracket and said slide and actuated by said driver-operating means, for effecting bodily movement of said bracket downwardly toward a workpiece, near the end of the operative stroke of the driver, to cause the operating end of said driver to track down the operating face of the deflector and embed the crossbar of the staple in the workpiece.

7. A fastener-inserting machine having, in combination, a main slide, a deflector fixed to said slide and provided with an operating face for en gaging and bending the legs of a staple as it is driven, a. staple driver, a throat member through which staples are driven by said driver, mechanism for imparting to said driver an operating stroke of a predetermined extent to drive staples through said throat member, a bracket member on which said throat member is mounted and in which said driver is slidably supported, and means for supporting said bracket member on said main slide for bodily movement, relatively thereto, in directions extending toward and away from the deflector to vary the space between the outlet end of said throat member and the operating face of said deflector.

8. A fastener-inserting machine having, in combination, a main slide, a deflector fixed to said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, mechanism for imparting to said driver an operating stroke of a predetermined extent to drive staples through said throat member, a bracket member on which said throat member is mounted and in which said driver is slidably supported, and means including a link for supporting said bracket member on said main slide for bodily movement, relatively thereto, in directions extending toward and away from the deflector to vary the space between the outlet end of said throat member and the operating face of said deflector.

9. A fastener-inserting machine having, in combination, a main slide, a deflector fixed to said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, mechanism for imparting to said driver an operating stroke of a predetermined extent to drive staples through said throat member, a bracket member on which said throat member is mounted and in which said driver is slidably supported, and means including a pivoted link and a leaf spring for supporting said bracket member on said main slide for bodily movement, relatively thereto, in directions extending toward and away from the deflector to vary the space between the outlet end of said throat member and the operating face of said deflector.

10. A fastener-inserting machine having, in combination, a, main slide, a deflector fixed to said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, mechanism for imparting to said driver an operating stroke of a predetermined extent to drive staples through said throat member, a bracket member on which said throat member is mounted and in which said driver is slidably supported, means for supporting said bracket member on said main slide for bodily movement, relatively thereto, in directions extending toward and away from the deflector to vary the space between the outlet end of said throat and the operating face of said deflector, and means including an eccentric for effecting such relative movement of said bracket member and said main slide.

11. A fastener-inserting machine having, in combination, a main slide, a deflector fixed to said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver,

mechanism for imparting to said driver an operating stroke of a predetermined extent to drive staples through said throat member, a bracket member on which said throat member is mounted and in which said driver is slidably supported, means including a link for supporting said bracket member on said main slide for bodily movement, relatively thereto, in directions extending toward and away from the deflector to vary the space between the outlet end of said throat member and the operating face of said deflector, and means including an eccentric bushing, associated with said link, for effecting such relative movement of said bracket member and said main slide.

12. A fastener-inserting machine having, in combination, a main slide, a deflector fixed to said slide and provided with an operating face for engaging and bending the legs of a staple as it is driven, a staple driver, a throat member through which staples are driven by said driver, mechanism for imparting to said driver an operating stroke of a predetermined extent to drive staples through said throat member, a bracket member on which said throat member is mounted and in which said driver is slidably supported, means including a pivoted link and a leaf spring for supporting said bracket member on said main slide for bodily movement, relatively thereto, in directions extending toward and away from the deflector to vary the space between the outlet end of said throat member and the operating face of said deflector, and means including an eccentric bushing, associated with said link, for effecting such relative movement of said bracket member and said main slide.

13. A fastener-inserting machine having, in combination, a main slide, a bracket member mounted on said slide, staple-forming mechanism associated with said bracket member and including a throat member, said throat member being provided with a staple guideway, through which staples are driven, and a staple-transferring passage having unbroken walls extending upwardly from said staple guideway, a movable inside former adapted to cooperate with an upper portion of said transferring passage to form a staple therein, and a staple-transferring member for transferring staples thus formed downwardly along said passage and into said staple guideway.

14. A fastener-inserting machine having, in combination, a main slide, a bracket member mounted on said slide, staple-forming mechanism associated with said bracket member and including a throat member, said throat member being provided with a staple guideway, through which staples are driven, and a staple-transferring passage having unbroken walls extending upwardly from said staple guideway, a movable inside former, pivotally mounted on said bracket member and operable to form a staple in the upper part of said passage, and a staple-transfer-ring member for transferring staples thus formed downwardly along said passage and into said staple guideway.

15. A fastener-inserting machine having, in combination, a main slide, a bracket member mounted on said slide, staple-forming mechanism associated with said bracket member and including a throat member, said throat member being provided with a staple guideway, through which staples are driven, and a staple-transferring passage having unbroken walls extending upwardly from said staple guideway, a movable inside former adapted to cooperate with an upper portion of said transferring passage to form a staple therein, a staple-transferring member for transferring staples thus formed downwardly along said passage and into said staple guideway, and a filler block in the lower part of said passage and interfitting surfaces on the upper end of said filler block and the lower end of said inside former.

16. A fastener-inserting machine having, in combination, a main slide, a bracket member mounted on said slide, staple-forming mechanism associated with said bracket member and including a throat member, said throat member being provided with a staple guideway, through which staples are driven, and a staple-transferring passage having unbroken walls extending upwardly from said staple guideway, a movable outside former, pivotally mounted on said bracket member and operable to form a staple in the upper portion of said passage, a staple-transfer- 20 14 ring member for transferring staples thus formed downwardly along said passage and into said staple guideway, and a filler block in the lower part of said passage and interfitting surfaces on the upper end of said filler block and the lower end of said inside former.

WILLIAM ARTHUR BARKER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,815,295 Goddu July 21, 1931 2,230,375 Clark Feb. 4, 1941 2,358,862 Lane et al. Sept. 26, 1944 FOREIGN PATENTS Number Country Date 527,304 Great Britain Oct. 7, 1940

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