US1242934A - Stapling-machine. - Google Patents

Description

J. H. FULLER.. sAPLlN MAcHlNE.v APPLICATION FILED DEC. 19. I9l6.

, Patented 001,; 16, 1917.

"Lmwm J. H. FULLER.

STAPLINGMACHINE.

APPLICATION man vEc.19. 1915.

Patented 001;. 16,1917'.

3 SHEETS-SHEET 2.

l. H. FULLER.

STAPLING MACHINE.

APPLICATION FILED DEC-19.1916. LQIQ-. Patented m1512917.

3 SHEETS-SHEET 3.

narran earns STARLINGMACHI1TE speiacation of Letters Patent.

Patented Unt# I6, 191'?.

Application led December 19, 1916. Serial No. 137,880.

To all 'whom t may concern.'

Beit known that I, JAK H. FULLER, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented 'certain new and useful Improvements in vStapling-Machines, of which theV following is a fullv and clear specification.

The present invention relates to improvements in the type of stapling machines in which wire is intermittently fed from a continuous roll into the staple forming and inserting mechanism, which cuts 0E a length of wire, furnis it into a staple and inserts it in a bunch of sheets, signatures or other articles to be bound together.

The object of the present invention is to improve and simplify the construction of this type of machine and to this end the invention comprises a stapling head in which is mounted a reciprocating recessed wire cutting and staple forming plunger, with v a male die member coperating therewith for forcing a length of wire into the recess of said forming plunger and a staple driviillg plunger mounted upon the forming plunger and adapted to force the formed staple through the object to be bound against a suitablefstaple clenching anvil. An oscillating operating head is connected through an eccentrically pivoted pitman with the staple driving plunger which reciprocates upon and with the staple forming plunger,

and an automatic dog is mounted betweenI the pitman/ and driving plunger to engage a shoulder upon the forming plunger and prevent relative movement between the forming and driving plungers during the initial stroke in forming the staple, so as to insure placing a completed staple within the forming plunger and pressing the charged plunger against the object to be bound prior to the movement of the driving plunger, which forces the staple through the object and causes its inner ends to be clenched underneath. This oscillating operating head may be operated by hand or power. The operating head with the pitman connecting the staple driving plunger constitutes, in effect, a toggle mechanism 1n which the pivot of the operating head and the pivotal connections vof the pitman with j the head and drivingv plunger are brought in line with the pitman atthe oo mpletlonof each stroke. In performing thls operative stroke with the toggle operating mechanism, the automatic dog retains its engagement with a shoulder on the forming plunger until near the completion of the stroke when an engagement between the pitman and the [upper end of the dog disengages it from the forming plunger andv allows the driving plunger to move downwardly through the e forming plunger.

Any suitable wire feeding -mechanism may be employed in my improved stapling machine, but in the preferred form of wire feed I provide the stapling head with a pair l of wire gripping rolls, one off which is spring-pressed and eccentricallymounted to engage and hold the wire against backward movement, and an oscillatry feed lever carrying in its lower end a pair of wire gripping rolls of the same description as those referred to and having operative engagement atits upper end with the oscillating operating head above described.,

In the staple forming mechanism the male die member, which presses the length of wire into the recess of the staple forming plunger, is actuated by suitable cam mechanism to move it out of the path of the forming and driving plungers at the completion of its work. 'Ihis member may be in the form of a spring pressed -hook moved `out of active position by a cam face on the forming plunger ^or it may be in the form of a sliding head held in position by a suitable spring and pressed vout of active position by a cam face on the forming plunger.

In order that my invention may. be fully understood it will first be described with reference to the accompanying drawings and afterward pointed out more particularly in the annexed claims. f

In said drawings, c v

V Figure l is a front elevation ofthe preferred form of my improved stapling ma'n chine;

Figs. 2 and 3 are detail views of the main portions ,of the same, showing successive shifted positions of the parts in the formation and driving of a wire staple;

Fig. 4 is an edge view Yof' the machine, partly in section to better show the operative parts;

Fig. 5 is a detail view looking from the of the bearing block, which is shown removed rom the head; i

we y

rear of thestapling head at the inner face by set screws supply wire,

iet

from a base plate 1 isa stapling head 2,

supported by the curved bracket arm 3, and carrying the upright bracket arm 4 and a horizontal bracket arm 5.

The front-:face of the stapling head 2 1s formed with;l a shallow vertical guideway or recess 10, of-the proper width to receive the staple forming and driving plungers presently front plate, secured to the stapling head 2, 16 and formed upon its inner face with a vertical guideway or channel 17, which is complementary to the guideway 10 of the head.

20 is' the staple forming plunger inthe shape of an oblong block, having recessed upper end 21 and recessed lower end 22. The lower edge of the plunger block 20 is formed with wire receiving, grooves 23, best shownin Fig. 5a of the drawings. vThe inner faces of the two arms of the lower end of plunger 20 formed by recess 22, have vertical wire receiving grooves 24, one of which is seen in Fig. 5. The plunger 2O has a thickened portion at one side, upon its rear face, as shown at 25, with a lower beveled cam face shown at 26, for the purpose here-l inafter explained. The side face of plunger 20 at the lower end of the thickened portion acts as a cutting off knife for the in the manner which will be presently explained. The upper bifurcated portion 21 of the plunger 20 is cut out sufliciently to receive the head of the staple driving plunger, presently to be referred to and the upper end 27 of the thickened side of the plunger constitutes a shoulder for the engagement of the automatic dog, which connects the forming and driving plungers, as hereinafter explained.

30 is the staple driving plunger formed of an elongated bar of steel which rests snugly in a channel 28, formed in the front face of the plunger 20. Atthe lower end of the driving plunger 30 is an integral rearwardly projecting block 31, formed with laterally presented vertical ribs 32, which engage and slide in the vertical grooves 24 inthe side walls of the bottom recess of plunger 20. The vertical thickness of the block 31 is approximately one-half the vertical depth of the reces 22, so that when the plunger 30 is raised to its limit upon the plunger 2O the unoccupied'recess beneath the block 31 `will determine the depth of the staple formed in the plunger '20.

to be referred to. 15 is a removable Mounted between the pitman 40 and the i plunger head 35 is the freely journaled automatic dog 45,'whose lower end is adapted to engage the shoulder 27 of plunger 20 to latch the Atwo plungers together. The upper arm of dog 45 is formed with an inwardly projecting lug 46, which is presented between the pitman 40 and a shoulder 43 formed on the oscillating operating head which will presently be explained. The pivot screw 41 is threaded into the head 35.

50 is the oscillating operating head freely journaled upon the main supporting pivot 51, extending through the upright bracket arm 4. Head 50 is formed with an integral operating hand lever 52. A retracting spring 55 is wound upon the journal 51 and secured thereto at its inner end, while its outer end is secured to a pin 56, carried by the oscillating head 50. The spring 55 tends to hold the operating head and parts connected therewith in their initial position ready to operate and to return the parts to this position, after each operation.

The pitman 40 yis its upper end by pivot screw 44, with the oscillating operating head 50, the pivotal connection being made at a point eccentric to the pivot 5l. This pivotal connection 44 is made in a milled out face 50a of the head 50, thereby forming the shoulder 43 above referred to and providing the space within which the pitman 40 and automatic dog 45 partly rest. A stop lug 52a formed integral with the handle 52, is designed to contact with the stapling head 2 at the completion of the operating stroke of the head, for lim`' iting movement in this direction.

The verticalchannel 1 0 in the stapling head 2 is enlarged at the lower end of the head to receive a disk shaped body 60, carrying the male die member in the form of an oblong lug or head having squared upper and rounded lower ends. This die member 65 is mounted upon a supporting rod.61, which passes freely through an opening 62, extending rearwardly through the lower portion of the stapling head, a wire spring 63 being mounted upon the stapling head and engaging the rod 61 for holding the die member 65 pressed normally forward in the plane of the staple forming and receiv ing grooves 23 and 24 of plunger 20. The disk-shaped portion 60 of this die member has a segmental cut out portion to present the straight edge 60a in the path of the cam 26, above referred to, so that in the reciprocation of plunger 20 the cam 26 will engage the edge 60a of the die member and forcethe die rearwardly against its spring plungers 2 0 and 30.

pivotally connected at i igiene/i,

The front plate 15 is cut out at the left, as shown in Fig. 1 to receive an eccentrically mounted spring pressed wire gripping roll 75, mounted upon set screw' 76, threaded into stapling head 2. A spring coiled upon the screw 7 6 and engaging the eccentric pin 77 holds the roll 75 with a yielding pressure in engagement with the wire which passes in from that side of the stapling head. The wire is supported below by the face of cut out portion of front plate `15, although, if desired, a suitable anti-friction roller may be provided for supporting the wire. The wire passing beneath the grip roller enters a suitable opening shown at 80 directly beneath the transverse grooves 23, iny the' lower end of plunger 20, provision being made for the feed of a sufficient length of wire beneath gripping roll 75 to form a staple of the desired size.

Mounted upon the horizontal frame arm 5 is a cylindrical box or casing 85, in which is mounted a rotatable wire spool 86 held in place by a tension nut 87, threaded upon a bolt 88 which passes from arm 5 through the boX 85. The tension spring 89 (shown in dotted lines in Fig. 1) is confined between the spool 86 and the back of the lcylindrical casing 85, so that by adjusting the nut 87 the proper tension can be vplaced upon the spool 86 to meet the requirements of the wire feeding device.

90 is an oscillating feed arm pivotally mounted upon the screw 91 threaded into the frame arm 5. Upon the lower end of this arm 90 is a grooved wire supporting roller 92, over which the wire from the spool 86 passes. Coperating with the supporting roll 92 is an eccentrically mounted spring-pressed feed roll 93, journaled at 94 en arm 90 and engaged eccentrically by a suitable spring (not shown), coiled upon screw 94. The upper end of the arm or lever 90 is formed with a laterally, presented head 95, which rests normally in the square socket 50" formed in the oscillating head 50. This socket 50b is out approximately parallel withthe horizontal diameter of the oscillating head while it is resting in its normal retracted position. The head is projected beyond the wall of theI socket 50h to form a nose 50c which is designed to engage the feed lever 90 upon the return stroke for restbring the feed lever to its initial position. The oscillating operating head 50 also has a concentric surface 50d which engages the upper end 95 of lever 90 during the stapl/e forming and driving stroke.

Mounted directly beneath the staple forming and driving plungers 20 and 30 is a staple clenching anvil which may be of usual construction, with provision for properly adjusting the clenching anvil either as a whole or in parts. is a gage plate mounted upon the forward end of a supporting rod 106, which passes through an opening in the bracket arm 3 and is held in the desired adjusted position by a set screw, such as shown at 107.

In Figs. 6 and 7 I show a slight modification of the stapling head in which is employed a hook-shaped die member to take the place of the die member 65, above referred to. This member 110 is journaled upon a rod 111, mounted in the forwardly presented studs 112 of the stapling head and engaged by U-shaped spring 113, which is coiled upon the rod 111 and has its opposite ends engaged by the front plate. A shoulder upon the hook is presented beneath the bifurcated lower end of the staple forming member 20, in substantially the same position as the member 65, is presented in the preferred form. When the staple is formed in member 20 bythe engagement of the hook 110 with the wire, said hook is moved out of the path of the two plungers by the cam action of the lower en'd of one of the plungers on the projecting portion of the hook.

The operation of the machine will be understood from the following brief description.

Assuming the wire to be properly threaded into the stapling head through the feed rolls of the feed arm 90, the papers to be stapled are placed in position against the gage 105 above the anvil 100. rlhe operating head is then moved quickly to the right with the result that the toggle connection g with the driving plunger and the latching of the driving plunger to the staple forming plunger, through dog 45, will cause these plungers to move downwardly together, irst cutting od a length of wire (which is fed in during this kinitial movement of the plungers) between the edge of the face plate 15 and the edge of the plunger 20, then forming a staple by bending said wire over the head 65 up into the grooves 24 of recess 22, then causing head 65 to recede out of the path of the plungers and finally moving the plungers downwardly until the plunger 20, charged with the formed staple, is in contact with the papers 'above the anvil, the downward movementof the plunger being thus arrested by its engagement with the parts on the anvil, and the continued movement of the operating head forcing dog 45 out of engagement with the shoulder 27 .of plunger 20, which unlatching of the two plungers, permits the staple driving plunger 30 to pass on downwardly alone, with the result that the staple will be pushed out of the grooved recessed lower end of plunger 2O and forced through the papers and have its ends turned and clenched upon the under side. Upon the release of the handle 52, its spring will return it to its initial position, restoring the operating parts to their 1. In a stapling machine, the combination of a stapling head, suitable Wire feeding means, relatively movable staple forming and driving plungers mounted in said stapling head, an oscillating operating head,

a pitman pivoted at one end to one of saidl plungers and at its opposite end to said operating head, and a dogD normally locking said plungers against relative movement and formed with a part Which projects into the path of parts of said operating head and said pitman.

2. In a stapling machine, the combination of a stapling head, suitable wire feeding matassa means, relatively movable `'staple forming and driving plungers mounted one u on the other in said stapling head, an oscillating operating head, a `pitman having a pivot at one end to connect with said driving' plunger and another pivot at its opposite end to connect With said operating head, and a dog mounted upon the Pitman-plunger pivot and adapted to engage said forming plunger.

3. In a stapling machine, the combination of a stapling head, a reciprocating staple forming plunger mounted in said head and formed with recesses in its opposite ends, a

staple driving plunger mounted upon sald forming plunger, a dog pivoted upon said i driving plunger in position to engage a shoulder on said forming plunger and movable out of said engagement into the recess in the upper end of said forming plunger, qmeans for feeding Wire to the stapling head, a staple clenching anvil coperating with the forming and driving plungers, operating means for said plunger-s, and means for automatically engaging With and dis-engaging said dog from the forming plunger. i

HJAK H. FULLER.

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