US1048522A - Paper-stapling machine. - Google Patents

Description

N. E. GIBSON.

PAPER STAPLING MACHINE.

APPLICATION FILED DEG.27, 1910.

1,048,522., Patented Deum, 1912.

2 SHEETS-SHEET 1.

" v Allarm g N. E. GIBSON.

PAPER STAPLING MACHINE. APPLIOATIO'N FILED DEG. 27, 1910.

1,048,522. Patented 1m31, 1912.

4UNITED sauras PATENT OFFICE.

NICHOLAS E. GIBSON, 0F CHICAGO, ILLINOIS.

PAPER-STAPLING MACHINE.

Appueaaon mea December 27, 1910. seran No. 599,348.

an 'l appropriate length of wire from a continuoust strand, the formation of such wireintov a staple, the insertion of such staplefinto' an a propriately positioned paperody or the l1 e,

leration of the mechanism.

e clenching of the staple, and an automatic lfeeding of the wire to present a fresh-staple-length thereof to be cut and formed by the next succeeding op- In the drawings, wherein I have illustrated an embodiment of my invention 1n 'a small hand-operated stapling device: Figure 1 is a front eleyation with the cover part removed. Fig. 2is a plan view with parts in section; Fig. 3 is a-vertical section on line 3-3 of Fig. 1; Fig. 4 is an enlarged detail, showing in perspective in disassembled relation, several of the plunger parts; and Flg. 5 is a sectional detail on line 5-5 of Fig. 1.

In the drawings, 10 indicates in general a frame casting comprising' a base4 11 bearmg an anvil 1-2, and a flat web or arm 13 at one end merging into the base, and at its opposite or head end overhanging `and spaced apart from the anvil 12. The anvil 12 carries a work plate 14 screwed thereto and also supports a removable forming d1e .15, located in an appropriate recess and having its upper surface appropriately grooved as at 16 to deflect towardeach other the ends of the staple in well known manner.

Above the anvil 12 there is mounted, on the end of the arm 13, a head block, 18, providing left and right side walls 19 and 20and a rear wall. 21, secured to arm 13 as by screws 22. The guide way between the aforesaid head walls is overlain in part by a front plate 23, secured to the head-block as by screws 24 and in the rectangular guideway thus 'encompassed works a two-piece lunger mechanism, 25. Specifically, 26 1nicates the plunger element constituting the Specification of Letters Patent.

Patented Dec. 31, 1912.

reciprocating cutting .and bendin instrumentality, or Shaper member c anneled vertically as at 27 alon its rear face, the right-hand side wall o the said member providing near its lower edge a cutter blade 28 and the opposite side-wall carrying a spring-depressed gage pin 29, projecting from socket 30 through the bottom of said side wall and normally maintained against its lower limitation stop 31,`by a sprin 32.

seated between the gage pin and the en of the socket 30. Normally to sustain the shaper member of the plunger in raised position, I provide withm' the face plate 23 vertical spring recessesk 33, in which Vare disposed extension springs 34, each engaging a I pin 35 at the top of the recess and a pin 36 upon the shaper member 26.

Within the vertical guide recess 27 of the shaper member 26 of the plunger is slidably mounted the driver member thereof, numbered 37, and consisting of a rectangular driving head 38 with a stem extension 39 to which is attached the prime mover, in thepresent instance a handle 40, appropriately shaped to receive impacts of the operators hand. The driver head 38 is capable of an amount of vertical movement relative to the Shaper member defined b a pin ,.41 on the front face of the driver ead playing in a slot 42 in the Shaper member and the driver member is held normally raised relative to the Shaper member by a spring 43, at one end bearing under the handle 40 and at its other end bearing on a collar 44 slidable on stem 39 and resting upon the top of the shaper member 26.

In`the right wall 20 `of the head block 18,

-is mounted an annular die or` stationary shear member, 45, having its central opening formin part of a wire guide path 46 throu h Whlch a wire A may be fed until its end a uts againstithe left wall 19 of the face 50 and a transverse wire-receiving' groove 51 cut inwardly and downwardly` rom its front edge. An elongated, vertical slot is made in the ,back wall 21 of the head V110- block 18, and in it said saddle lever is pivoted on a pin 53v in such fashion that the upper end of the lever normally contacts with and is stopped by the front surfaceof the frame arm 13, yin. which position the head of the lever projects into the slideway for the plunger and the front recess 51 of the saddle alines with the wire guide 46, so that a wire inserted through said guide may pass through the recess 51 and lie just back of the guide pin 29. The saddle mem- 'ber is yieldingly pressed to the aforesaid walls of the cut-ter member and the inner wire. Obviously, however, W

' for temporarily faces of said walls are, therefore, preferably channeled, as at 57, neatlyl to receive the enthe driver member of the plunger performs its driving function, the saddle member must be moved out of its path, and to this end, the lower extremity of the drivingmember is provided witha curved corner 58, to act upon the cam surface 50 of the saddle member to move the head of the latter rearwardly into recess 52 against the tension of spring 54 as the driver member is i descent.

The last described operation presupposes a movement of the two plunger members in unison until the Shaper member has performed its function, and then a further depression of the driver member, sliding it downwardly relative tothe shaper member. In order that a single depression of the prime mover 40 niay-thus occasion a depression of both plunger members in unison until the shaper member has performed its function, and then occasion the further depression Iof the driver member to vperform its driving, function, I provide means for coaction between the Shaper and driver members to transmit movement from the driver member to the Shaper member during a portion only of the rangeof movement'of the driver member. To this end, I provide locking the two members of the plungertogether by a lever member 60 suitably arranged to receive motion .from the driver member of the plunger during a port-ion only of its stroke, and to impart said motion to the shaper member. Specificallv, lever 60 is of bell-crank construction, mounted on'a pivot pin 61, in the upper rear corner of slot 52 in the headblock 18 to from the driver member of the plunger,'I

.spring 63 acting -on the vertical arm 62.

stand normally with its pendent arm 62 substantially vertically positioned by a leaf spring '63, mounted on the rear face vof the frame arm 13 and proj ect-ing through a suit.- able aperture 64 in said arm; the horizontal arm 65 of said bell crank'u'ndersuch conditions extending forward to engage bo'th members of the plunger. The portion of said lever arm 65' YJwhich receives motion will lterm its receiving-nose 66, and the portion thereof which delivers motion to the Shaper member of the plunger- I will call its delivery-nose67.` The receiving-nose 66 is preferably curved on its'upper surface, as best shown in Fig, 4, and stands normally engaged in a recess 69 in the rear face of driver head 38, said recess opening into an elongated depressed channel 70 formed inf said rear face of said head.v The delivery nose 67 has its lower extremity appropriately shaped to coact with a shoulder 72 forming the'bottom of a recess 73, made in the left side wall (right of Fig. '4) of the Shaper member, so that when the driver member is depressed the upper surface of its recess'69 acts upon the receiving nose 66 to tilt the bell crank lever 60, depressing the horizontal arm`65 against the tension of Consequently the vertical component of movement imparted to the receiving nose 66 is vtransmitted through the delivery nose 67 to the shoulder 72 of the Shaper member,

and the driver member and shaper member 100 I descend in unison until the receiving nose 66 slips into the channel 70, and rides on the front surface thereof, leaving the extremity of delivery nose 67 resting idly upon the shoulderv 7 2 of the Shaper member. 105 l The proportion and shape of the parts is such, of course, that the lower end of the shaper member is brought down to a short distance from the work plate 14,-that is,

sufliciently far to perform its intended func? 110 tions, before the receiving nose 66 slips into the channel 70.

The feeding mechanism for delivering the wire is arranged for automatic operation in appropriate timed' relation to the ments of lthe plunger 'parts and preferably comprises primarily a vibrating feed dog,

which i. s moved by .the plunger against spring tension to condition it for operation,

is automatically locked in such position, and 120 is tripped automatically by the plunger at the extreme end of the plunger up-stroke, thereby to release the feed dog for a spring actuated feeding movement.

75 indicates a wire holding` stud on the arm 125 13 provided with ra detachable retaining head 76,' screw-threaded thereintq and receiving the coil of wire-'A the end of which is led through the feeding mechanism and through the wire guide 46. To prevent ac 130 movey Specifically, y

cidental retraction of the wire from said guide 46, I provide on the right side of the head block 18 a lug 77 having a guiding aperture 78, through which'the wire is led to lie upon the top surface of the lug 77 and be acted upon by a retaining pawl 79, pivoted to a suitable stud 80, and having its toothed lower surface pressed by spring 81 against' the wire in position to clamp it against retraction, but to accommodate the forward feeding operations of the wire. The vibrating feed member preferably com-l prises a lever 83, pivoted as at 84 upon the arm 13, said lever providing a horizontal projection 85 and a vertical leg 86, provided bet-Ween its ends with a lateral spur 87 and at its lower extremity having a foot plate 88 presenting at; its end an apertured guiding offset 89. Against the foot 88 works a pawl 90 pivoted as at 91 to the leg and having its toothed lower surface yieldingly depressed by a spring 92 to clamp the wire for the forward-feeding operation but to slip easily along'the wire in direction toward the'wire supply. A long coiled spring 93 at one end attached to the spur 87 and at its other end to a pin 94 serves to actuate the vibrating feed member on its forward or feeding stroke. The projection 85 of saidA vibrating lever extends .through an elongated slot 95 made therefor in the side wall 20 of head block 18 and its tip extends into an aperture 96 in the side wall of the shaper member of the plunger to lie directly in the path of reciprocation of the shoulder 97, the proportions of the parts being such that while theshaper member is being depressed, shoulder 97, acting on the tip of the projection 85, moves the lever 83 to the full extent of its intended retraction, which is limited by a stop pin 98 upon the frame. To latch the vibrating lever in this position of retraction I provide a vertical latch dog 100 disposed in a slot- 101 in the rear wall of the head block 18 and mounted upon the pivot pin 53. Said latch dog 100 is provided with a latching nose 104, positioned to overlie the tip of the projection 85 when the latter is depressed, and is also provided with a lower cam surface 105, for coaction with the surface 106 at the bottom of the slot 96 in shaper member 26 of the plunger'. Springs 107 working against the rearside of the dog 100 tend Ato press the latter forward into the path of the projection 85 of the feed lever, so that when the projection is depressed the latch nose 104 engages its upper surface and restrains it against return to original position until the shaper member of the plunger has completed substantially its entire up stroke and its suifaee 106 strikes the cam projection 105 of said dog and forces the dog back into its recess 101 against thetension of springs 107, thereby to release the feed levler for spring-return under the influencel ofl spring 93 to normal position, so to effect a feeding operation upon the wire A. The precise'extent of feedin throw of the feed lever is regulated by adjustment of a screw 108 which acts as a stop to limit the upwar movement of lever projection 85.

As a refinement in the machine, I preferably provide means for insuring a complete reciproeation of the prime mover each time it is depressed, thereby to prevent such partial operations of the machine as would result in short-cut, mutilated, or partially folded staples. With this end in view,Ipro vide on one sideof the driver'body 38, a vertical rack 110, with terminal switch recesses 111 at its ends, and on the face plate 23 I pivot a switch pawl 112 playing through the slots 95 and 96 in the head block 18 and Shaper member 26, so that the toe of the pawl may stand normally in the lower switch-recess 111, below `the rack 110. A pawl spring 113 connected between the tail of the pawl and a spring post 114 on the base plate serves normally to hold the pawl with its toe horizontal, but it will be apparent from Fig. 1, the pawl will act as a means to. prevent reversal of movement of the driver member at any time save at the opposite extremities of the stroke, when the toe of the pawl enters one of the switch recesses 111. l

Now, it willbe apparent that the operation of the machine speciically described is briefly as follows: The machine is threaded with wire and normally stands with the parts in the positions shown in Fig. 1, the wire passing through the guide 46 across the saddle recess 51 to abut against the remote wall of the head block 18. Now, the material to be stapled is inserted in the space between the head block 18 and the work plate 14. The prime mover or handle 40 is depressed generally by a sharp blow, with sufficient force to drive the reciprocating driver part to its lowest limit of travel. The resultant downward movement of the driver member of the plunger acts upon the receiving nose 66 of bell crank lever 65, and the delivery nose 67 thereof acts to move the Shaper member 26 downward against the tension of springs 34, so that its shear 28 severs the wire at the stationary shear member 45, and its side members bend the wire length so out around the saddle 47 into U- shape, the legs of the staple lying in the slots 57 in the side walls of the Shaper member. Such downward movement of theV shaper member likewise forces down the feed lever projection 85, throwing the 'foot 88 outward and upward along the wire, against the tension of spring 93, so that the feed pawl il() takes a fresh grip upon the wire nl an elevated point :ind as the feed lever projection 85 reaehesits depressed position nose 104 of latch 100 engages and locks it. I When the cutting and bending functions of the shaper 'member of the plunger have been performed, the receiving nose work plate 14 but the driver member continues to descend compressing the spring 43. When the surface 58 Vof the driver member strikes the cam surface 50 of the Saddle member 47, the latter is pressed rearwardly into its recessagainst the tension of spring 54, releasing the staple and leaving it standing with its legs upon the material to be stapled, and guidingly maintained by the recesses 57 in the Shaper member of the pluner. Thus, when the driver ymember contacts with the transverse or yoke portion-ofA the staple, the legs are driven through the material on the work plate until the ends of the legs meet the forming die plate 15, and by reason of the contour of the recess 16 therein, are turnedinwardly so that when the driver reaches the bottom of its travel,

the staple is completely closed. It will be observed, that when once the driver member starts in its descent the nose of the Switch 4awl 112 turns downwardly and coacts with rack 110 to hold the driver member against retraction. When the bottom of the downstro-ke is reached the switch pawl Slips into the upper Switch recess, and as ,the back stroke of the driver commences the pawl'is switched to present its nose upwardly, thereby to act to prevent a second operation of the device until the parts have all been restored to normal'position. On the up-stroke of the plunger the driver member rises under the tension of itsgstrong spring 43, until the Stop pin 41 engages the end of slot 42, and the,weaker Springs 34 lift the Shaper e member back t'o its normal raised position.

Justbefore Vthe Shaper member reaches its normal position its surface 106 acts upon cam surface 105 o f holding pawl 100 for the.

feed lever to press the holding pawl back into its recess, releasing the projection 85 of the feed lever, so that said lever is Springretracted to normal position, the adjustment of stop screw 108 being Such that just enough wire is fed forward through the path 46 to bring its extremity into contact with the opposing wall of the head block; s lct 51 in `the saddle and guide pin 29, both exerting a guiding effect to insurethe proper emplacement of a fresh staple-length of wire for the-succeeding stapling operation.

While I have herein described in Some detail a specific embodiment of my invention it will be apparent to those 'skilled in the art that numerous changes in the construction employed might be vmade without departure from the spirit of my invention and within the scope of the appended'claims.

What I claim is:

l. In a machine of the character described, a head frame providing a guideway and a space confronting said guldeway, a twopiece plunger working 41n Said guideway comprising a driver member and a Shaper member, a prime mover connected with said driver member, and a lever mounted.on a

transverse pivot in said Space within the head frame, Said lever lying wholly within said space confronting the driver and Shaper members and provided with oppositely disposed nose portions coperating with the respective members of the plunger,.and imy parting motion from the driver memberl to' the Shaper member during a portion only of the travel of the driver member.

2. In a hand-operated stapling machine,

the combination of a channeled' frame a v channeled Shaper vertically reciprocable therein, a driver member Slidable in the channel of the Shaper member, Va handlestem above and connected to the driver member, a spring surrounding said Stem for con-I f nection between the driver and Shaper mem bers, said driver and shaper'members having like faces provided with opposing shoulders, and a wide lever, 63, pivoted on an `axis parallel with said 'faces and providing oppositely facing nose portions, within the width of the lever, arranged to 'coact with the opposing shoulders on said members, substantially as described.

3. In a hand-operated stapling machine, 4 i

the combination of a head frame; a Shaper member channeled throughoutits length, ex-

tending above said frame, and' slidable in said frame; a driver member slidable in the Shaper member; a handle-stem above and connected to the driver member; a Spring surrounding the said stem, for interposition between the driver and Shaper members; means for connection of the driver and shaper members during a portion only of the stroke of the driver member; spring means for restoring the Shaper member; an anvil coperating with the driver member at the end of the stroke, and a saddlenormally eX y movable automatically to escape from `...the path of the driver.'1 'A ,r

4. In a hand-operated *stapling machine, the combination of a head frame; a Shaper member channeled throughout its length, ex-

-able by the driver member and moving the -tending into thechannel of the Shaper, and' Shaper member during a .portion only of the Stroke of the driver member; Spring means for restoring the Shaper member, an an'vil coperating with the driver member at the end of its stroke; and a saddle normally extending into the ychannel of the Shaper member and movable automatically to escape fromv the path of the driver member.

5. In a hand-operated Stapling machine, the combination of a head frame having a guidevvay and a confronting Space therein, a channeled Shaper member slidable vertically in the guideway of said frame, and extending thereabove, a driver member Slidable in the'shaper member, like faces of the driver and Shaper members being provided with opposing shoulders, a handle stem above and connected with the driver member, a Spring Surrounding said Stem interposed between the driver and Shaper members, and a spring-pressed latch lever mounted in said head space confronting the Shouldered face of the driver and Shaper members and providing, as a continuation of the body of the lever, nose portions for coaction with the opposing shoulders of Said members, to receive motion from the shoulder of the driver member and communicate it; to the shoulder of the Shaper member.

6. In a hand Stapling machine, the combination of a frame providing a head and an anvil therebelovv, a channeled Shaper slidable in the head and extending thereabove, a driver Slidable in the channel in Said Shaper, said Shaper and saidl driver having shoulders on corresponding faces; a handle extending upward from the driver, a springL Surrounding Said stem acting on the driver and Shaper, a spring connection between a stationary part of the head and the Shaper; a bell-crank lever pivoted on the frame coacting With the Shoulder on the driver and Shaper to receive movement from the former and communicate itv to the latter,"

Shaper member, said driver member having therein a rack provided at its ends with Switch recesses, and a paivl pivoted on the frame, coperating with Said rack and switch recesses. substantiallyY as described.

S. In a stapling machine, the combination of a frame, providing a base. an anvil, and an arm overhanging the anvil, and a guiding head upon'said arm, a two-piece plunger gnidedly supported in said head. and comprising a driving member and a shaping member, a prime mover for .said driving member, means for connection of .said shaper member to the drivel' member for actuation thereby, vvire guiding and supporting means upon Said head. wire-reading means upon said arm including av vibrating feed lever moved to set position b v the plunger, and a latch arranged to hold said arm in .set position, arranged for release b v the plunger.

9. In a stapling machine, the combination of a frame providing a base. an anvil. an arm overhanging the anvil. a guiding head upon Said arm. a'tn'o-piece plunfgm` guidedlv supported-in said head. and comprising a driver member and a shaping member. a prime mover for said driving member. means -for connection of said driving member with the shaping member. 'for actuation thereof. wire guiding' and shaping means. upon Said head. vvire-feeding means upon Said arm includingr a vibrating feed lever. a Spring for effecting the feeding movementsof .said lever. means operable bv the plunger to condition said lever for its teeding movement. a latch for holding said lever against the tension of .said feed spring. and meansupon .said plunger for releasing .said latch.

10. In a hand-operated .stapling machine. a frame providing a head. an arm. and a base. the head having a face plate. and an interior guideivav: a channeled shapermember slidable in the guidewav. Springs connecting the tace plate and Ishaper member: a driver member slidahle in the channel oi the Shaper member. said driver-having a .stem and a handle thereon. a collar surrmunling the stem and bearing on the Shaper member, and a springinember between said collar and handle.

In testimony whereof I hereunto set my hand in the presence of two vvitneSceS.

NICHOLAS E. GIBSON. In the presence of- W. LINN ALLEN, GEO. T. MAY, Jr.

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