US2037461A - Stapling machine - Google Patents

Description

April 14, 1936. w. DRYPOLCHER 2,

' STAPLING MACHINE Filed May 10, 1934 2 Sheets-Sheet INVENTOR 64' NIALIHM .DR'Y OLcNER.

ATTORNEY I 4, 1936'. w. DRYPOLCHER 2,037,461

STAPLING MACHINE Filed May 10, 1934 2 Sheetg-Sheet 2 '74 73 CD as '73 5 7/ F3; 5, Fl 'Z, 76 f 29 INVENTOR' W/Lufln .DRYPOLCHER. Pi .5, BY

ATTORNEY Patented Apr. 14. -196 UNITED STATES- PATENT 7 OFFICE STAI'LING MACHINE William Drn lcner. Valley Stream, N. 1., assignor to Lou Obstfeld, and Abraham 1. Obstfeld, New York, N. Y. Application at, 10, 1934, Serial No. 124,911

40 claim. (on. 1 -49) This invention relates to improvements in stapling machines and has reference particular- 1y to stapling machines of the plier type, i. e., a stapler especially adapted for oflice use and capble of beingoperated b a single movement of the hand to eiiectthe clinching of a staple.

The present invention is a further development of the invention forming the subject of an application for Letters Patent in the-United States, filed October 27, 1933, Serial Number 695,473.

In practically all of the successfully operated stapling machines in use today, the staple is clinched by means of a plunger which is driven downwardly against the staple by a blow struck with the palm of one hand. Wherever the attempt has been made utilize the plier type of stapler and especially in connection with a magazine feed for the staples, considerable leverage has been required in order to effect the proper drive in causing the staples to first pierce the work to be fastened and then to clinch the ends 7 of the staple in its final fastening position.

with the foregoing in mind it is the purpose,

of this invention to avoid the dimculties in construction and operation heretofore encountered in this type of stapling device, and to construct the latter so that it may contain in its magazine a libe a supply of staples and at the same time utilize the magazine as one of the plier arms and as a carrier for the staple driving plunger and work holder, the other arm or lever being part of a system operating the driving plunger and work holder and being operatively mounted upon the magazine arm. In accordance with this construction, it requires but the simple function of moving. the second arm towards the magazine arm to initiate and bring about one complete stapling operation.

I have accomp is d the purpose of my invention by means of a stapling device, one embodiment of which is described in the specification,

set forth in'the appended claims, and illustratively exemplified in the accompanying drawings.

prevent'the unintentional projection of staples from the magazine; a

Figure 5 is a section onthe line 5-5 of'Fig. 4, and also shows in section the lower end of the staple driver;

Figure 6 is a sectional view ofa further modification of the retractor for the staples;

Figure I is a plan view of the jaw bracket a 1 Figure 8 is and a fragmentary sectional view at the forward end of the device, showinga modifica- 'tion;-

Figure 9 is a side elevational view showing a modified connection between the plunger and levers;

Figure 10 is a sectiononthe line li -l0 of Fig. 2, with parts removed; 7

Figure 11 is a fragmentary top plan view of the combined handle and staple magazine, showing the staple pusher locked in retracted position; and

Figure '12 is afragmentary top plan-viewer the guide plate at the forward .end of the staple magazine.

B Referring to the drawings, l0 denotes the magazine holder forming one arm of the device and comprising a substantial length, of channel bar II, the upright side walls of which along their upper free ends are each provided with a head or groove l2. 'Mounted within the bar II and attached thereto by-meansof spot welds is a second channel bar B, the closed side contacting with the bottom ,oi the bar I l and the upright sides 'being spaced slightly from the sides of the first bar H to form a channel for the staples M.

'The upper ends of the sides of the inner bar l3 are turned inwardly towards each other and parallel'to the closed side to form flanges 15 uponwhich the closed ends of the staples H may be supported and guided throughout the channel in the magazine. Spaced above the flanges l5, and

mounted at its sides in the beads or grooves. i2

of the bar H, is a guide plate l6 which not only serves as the upper wall of the magazine channel, but which is provided with a longitudinal slot ll throughout its length to accommodate the staple pusher and latch l8. The staple pusher and latch. l8 comprises a fiat plate in slidably mounted in the magazine channel and having itsleadingend [8b slightly inclined with respect to. thetransverse axis of the magazine to accommodate the end of a clip of staples M which are arranged as described in United States Letters Patent No. 1,811,060 issued June 23,- 1931.- Spacedirom the leading end of the plate is amounted the restricted portion of 9. depending arm or stop l9 of the latch proper, the depending arm l9 projecting into and substantially forming a movable wall within the walls of the inner channel bar l3. The latch is an angular member and the angle between the stop l9 and plate is raised into a bead 20 which overhangs the flanges 15 to prevent the latch being removed. The rearward end of the latch plate is turned upwardly to form a finger piece .2l by means of which the latch may be set. Beyond the finger piece the latch projects to form a lip 22 loosely arranged beneath the turned over end of the plate. The finger piece 2| is provided with a lip 23 at one side to engage a notch 24 cut in the wall of the guide l6 so as to enable the latch to be locked against movement toward the feeding end of the magazine to unintentionally pro- .iect the staples. The stop l9 of the latch [8 receives one end of a rectangular coiled spring 25 housed within the inner bar l3 andabutting at its rear end a stop 26 which is formed by an angle bar mounted in the end of the bars II and I3. The tendency of the spring 25 is to expand within the housing and to yieldably urge the staples toward the leading end of the magazine. The staple pusher plate l8a can be moved rearwardly against the pressure of the spring 25 to the retracted position illustrated in Fig. 11 and by alateral movement of the finger piece 2| permitted by the loose mounting of the arm l9 in'the slot I80 the lip 23 is caused'to engage the guide plate l6fin the notch 24 thus releasably locking the staple pusher in retracted position.

The leading end orhead of the magazine l0 comprises an upright housing 21 formed by a rectangular wall in its upper portion above the magazine and depending side plates 28 embracing the sides of the outer bar II at its extreme end. A plunger 29 which reciprocates in the housing 2'! drives the staples. The plunger 29 is a rectangular member having a slot 30 in its rear wall to receive a projecting end of a lock spring member 3|, the end thereof being projected through an opening 32 in the housing 21 and into the slot 30. The spring 3| is of the fiat type which projects substantially parallel with the rear upright. wall of the housing 21 and has its attached lower end mounted in a strap 33 stamped out of the wall of the housing.

The front wall of the plunger 29 carries a. driver or blade 34 which is set slightly at an angle with respect to the front wall of 'the housing to coincide with the position of each staple I4 as it takes its position beneath the driver. A tapered filler plate 35 is arranged over the driver 34 to give the proper alinement of the plunger 29 in the housing 21.

The forward end of the guide plate [6 forms a through alined openings in the extreme upper end of the plunger 29 and through corresponding openings in a cap 40 embracing the upper end of the plunger above the housing 21, and which projects beyond the cap at opposite sides to form f crum points for one end of a lever system hereinafter described.

As previously stated the lower end of the housing 21 consists of side walls only, so that the leading end 61 the magazine in is open and it is at this open end that the magazine is both loaded and discharged. As a consequence of the con-- struction just described, the staples M are constantly being urged towards the front end of the magazine ill by the action of the spring 25 and in order to hold or limit this forward movement, to bring each staple directly beneath and in line with the driver 34, the leading end of the inner bar l3 stopsshort of the front of the housing 21 by the width of one staple so as to allow the driver to pass, and a door or gate 4| is hinged in a bracket 42 on one side of the housing 21 and releasably locked or latched in a bracket 43 on the iopposite side of the housing, to close over the end of the magazine l0 and cover the entire space from the lower end of the closed portion of the housing 21 to the bottom of the magazine or outer channel bar II and to prevent the staples from being projected beyond the delivery end of the magazine. The hinge connection for the'door 4| is provided with a spring 45 which tends to yieldably urge the door to take its closed position.

It should be pointed out at this point in the description that they purpose of the latch construction !8 in the magazine is to prevent the spring 25 from projecting the staples l4 from the magazine at its open end when the door 4| is opened for the purpose of removing a defective staple or reloading. It is necessary for the operbar l3 on a pin 41 carried by and disposed transversely thereof. A spring 48 is coiled about the pin 41 between the arms, and its ends are disposed against the cross piece and a bracket 49 forming an integral part of the inner bar l3 and embracing the dog 46. The spring 49 tends to urge the cross piece, which projects towards the door, upwardly against the under sides of the flanges IS. The free end of the cross piece 460 projects into the path of the driver 34 and supports the foremost staple fed into delivery position by the staple pusher. Thus, when the driver 34 is actuated'to drive a staple it engages said staple and forces the latter downwardly together with the free end of the cross piece against the force of the spring 48. Thefree end of said cross piece moves on the arc of a circle so that near the end of the downward movement thereof it assinnes a position inwardly of the driver 34 out of the pathgof the latter, as illustrated in Fig. 2, releasing the staple for its final motion to clinching position. The succeeding foremost staple is held from forward movement by the upper portion of the driver blade, and as the latter lifts and returns to its initial position the free end of the cross piece 46a follows the end of the blade in its upward movement which finally reaches an elevation above that of the staples,

ing end ofthe clip. The staples take substantially theposition'illllfibrated in Flgure and it will be seen that the main pressure exerted-by the magazine spring 25 is against the barb 50 so that when :the door is opened 'the most that can happen is that the staples may be forced slowly past the barb which will prevent the danger of allowing the spring 25 to rapidly project the staples with sufiicient force to cause danger to the operator or one handling the stapler. In this construction the downward movement of the driver 34 causes. the latter to engage the tip of the cross piece of the dog 45 and to move downwardly out of engagement with the staples which normally move forward to bring the outermost staple of the clip into engagement with the face of the driver. Withdrawal of the driver allows the end staple to take its place in readiness'for the nextstapling operation. a

lnFigure 6 the tip of the crow piece of the dog 45 is turnedzup to form'a lip 5| which re places the barb and allows the end staple of the clip to stop against it, the lip being depressed with the dog by downward movement of the driver, whereupon the end staple is projected against the latter and into driving position when the driver is retracted. Thedog 45 provided with the barb 50 or with the lip 5| constitutes means to releasably resist projecting the staples beyond the end of themagazine but said dog operating in the manner hereinbefore described permits the staples to be fed successively to delivery position into the path of said driver when the latter is actuated to move the cross 45a downwardly against the force of the spring 48.

v Referring now to the means used to operate the plunger 29, 52 denotes the other arm of the plier, which 'arm is virtually the movable one of the two, the other am being the magazine in. The lever-arm 52 comprises a-rounded free end and a yoke shaped pivoted end, the arms 53 thereof loosely embracing the sides of the plunger housing 21 and being pivotally connected to the arms 54 of a U-shaped bracket 55, which in turn embraces the sides of the magazine in and is pivotaliy mounted on a pin 55 carried by a bracket 51 spot welded or otherwise attached to the underside or bottom of the bar Ii at a point just backof the housing 21. The sidesof the bracket 55 between its pivotal connections with the lever arm 52 and pin 55 are provided with rearwardly and upwardly inclined arms 58, tothe ends of which the ends of parallel links 59 are pivotally connected, the opposite ends of the links being arranged on opposite sides of the upper portion of the housing, 21 and being pivotally connected to the lower ends of depending links 50, which have theirupper ends pivotally. carried upon the ends of the pin 39 projecting beyond the sides of the cap 40 of the-plunger 29.

Downward movement of the links 59 to depress the plunger 29 through links. BI! is effected by means of a link 5| mounted between the links hand to points of less leverage.

the arcuate movement in the lower closed end of the bracket 55 to clamp the papers or ma-.

terial to be stapled into position beneath the leading end of the magazine and head. The closed end 54 of the pivoted bracket 55 operates beneath the leading end of the'ma'gazine l8 and comprises a channelled upper face, a longitudinaily disposed slot 55 in its mid web portion and a stepped up rearwardlyprojecting lip 56 beyond the pivotal connection 55. The lip is brought into close contact with the under side of the magazine I I) when the is at rest and the arms separated, and this position is ylldably held by means of a spring 51 which consists of a flat strip disposed against the under side of. the bar It and pivotally mounted laterally thereof by a pin 58, the forward end of the spring being bent back upon itself to form a loop which rests in a groove in the under side of the lip 55; Beyond the loop the spring 51 is curved forwardly and then downwardly to form a finger grip 59. Rearwardly'of the pin 58, the spring projects along the under face of the magazine and at the rearwardend is turned up and forked to engage opposite sides of the end of the bottom of the bar I I. Inorder to facilitate operation of the stapler with-one hand, the upper arm 52 is also provided with a'rest '10 against which the joint of the hand between thumb and index finger rests while the first finger hooks over and about the-grip 55. In this manner the hand is allowed to exert pressure against the two arms II and 52 at the points where the maximum leverage consistent with the ease of operation may be obtained and said grip 55 and rest I0 obstruct movement of the tion of the device the leverage and link systems are so proportioned as to cause the closed end or jaw of the bracket 55 to first move upwardly at its forward end adjacent the under side of the magazine In before the plunger starts on its In the operaengagement with an anvil ll adjustably mounted in the channel upper face or jaw of the bracket 55 :and provided with spaced cuts or dies 12 and .13, respectively, to permanently and temporarily clinch the staples at their free ends. The positions of the anvil II are set bya winged or set screw 12d at the end of a screw stud I3 which is carried by the anvil and projected through the slot 55. A guide pin 14 with an enlarged fiat head depends from the anvil and moves in the slot 55 to correctly hold the anvil in its lateral position for any adjustment.

In operation the loaded stapling machine is taken in one hand which grips the arms in and 52 as previously described and the leading end of the magazine arm III is moved to position over the papers to be stapled and the jaw and anvil 1! take their positions directly underneath. The two arms are brought together and initially the anvil is raised to clamp the paper in position beneath the staple in the path of the driver 34.

Continued movement of the arms causes the plunger 29 to descend and with it the driver, which engages the end staple and forces it downwardly between the door or gate 4| until its endspierce the layers of material clamped between the under side of the magazine ill and anvil ii, and are turned by engagement with one of the dies of the latter.

Features which are made possible by the present construction are first, that by means of the compound leverage arrangement the arm II, which is virtually the movable member, is capable of exerting extreme force in the plunger and driver with the very least amount of exertion on the part of the operator. The lower arm iii, in addition to being a suitable grip in connection with the upper arm 52, is the magazine as well. Another point of importance is the fact that greater leverage results in this construction without a corresponding spread between the two arms being necessary. The particular arrangement of the parts of the present invention enables the same to enjoy the advantages of front feedor reload to the magazine, as well as facilities for making a temporary and permanent clinchingo operation of the staple.

The door or gate, which has heretofore caused some difllculties in manufacture, may be made according to this invention, as illustrated in Figure 8, of less height than in the construction illustrated in Figs. 1 and 2, the upper portion of the door being replaced by a projection 15 which is bent outwardly and downwardly over the path of movement of the upper or closed end of the staples so that when the latter are ejected from the machine, as the door is opened, the staples will be deflected downwardly. The loading of the magazine having the projection 18 would notbe impossible because there is suiiicient flex in the clip to enable the same to bend about the pro--- jection as it is fed into the magazine.

A modification which permits easy and quick access to the interior of the machine is shown in Fig. 9 where the links 6|! are cut out at 16 so that they may be engaged or disengaged at the ends of pin 38 to allow assembly or disassembly" of the plunger when desired.

Having now described my invention and the manner in which the same operates, what I claim and desire to secure by Letters Patent is:

1. In a stapling machine, the combination of a richer arms relatively movable toward each other and a lever-and-link mechanism pivotally associated with the arins and operated thereby,

@ the lower arm being a magazine to receive and deliver a clip of staples, means to urge the clip toward the driving end of the arm, and a driver at the end of the lower arm operated by said mechanism and relative movement of the arms toward each other to pick of! a single staple and the path of the staple beneath drive it through the material to be engaged, and a an anvil carried by a part of said mechanism in the'driver to turn the ends.

2. In a stapling machine, acombination of a pair of arms' relatively movable toward each other and a lever-and-link mechanism pivotally asso ciated with the arms, the lower arm forming a magazine to receive and deliver staples from the same end, a spring to project the staples, means to prevent the staples from being projected beyond the delivery end of the magazine, a reciprocating plunger operating at the delivery end of the lower arm and having connection with said mechanism to reciprocate with the movement of the arms toward each other, a driving blade carried by the plunger to engage the staple at the'end of the magazine and move it downwardlyto pierce thematerial to be attached, and

an anvil beneath the magazine operable by said mechanism to move upwai 'ily in the direction of the magazine before the plunger starts downwardly to drive the staple against the anvil.

3. A stapling machine of, the plier type, comprising a pair of arms adapted to be moved together to drive a staple, the lower arm forming a magazine to receive and deliver staples from the same end, a spring to feed the staples into neath the driver to clinch the ends of the staple during its downward movement, said bracket having arms extending upwardly of the lower arm and .Divotally supporting one endof the other arm ofthe pair, and a system of links between the arms of the bracket, the plunger, and the second arm of the pair, whereby movement of the pair of arms toward each other will first move the anvil toward the magazine 'and in line with the staple and then operate the plunger downwardly to drive the staple against the anvil to clinch its ends.

4. A stapling machine, as claimed in claim 1, in which said magazine has a receiving and delivery end for the staples and including a spring operated hinged gate for closing the delivery and receiving end of said magazine. a

5. A stapling machine as claimed in claim 1, including a spring operated hinged gate for the delivery'and receiving end of the magazine, and means within the magazine and frictionally engaging between the end staples of a clip 'to op-' pose continued forward movement of the staples when the gate is open. 7

6. A stapling-machine, as claimed in claim 1, in which the part which carries'the anvil is movable -and.in which a springis pivotally carried on the under-side of the magazine to resiliently engage and balance said part during movement of the other moving parts to reciprocate the plunger.

7. A stapling machine, as'claimed in claim 1,

including finger stops carried bythe two arms the operator's hand for in which the anvil comprises a plate having twov sets of dies, one thereof for temporary clinching and the other for permanent clinching of the ends of the staples. i

9. A stapling machine, asclaimed in claim 1, including a lever pivoted within the magazine and having a barb to engage between adjacent staples of the clip, and a spring to urge-the leverupwardly and the barb into frictional engagement with the staples, the end of the lever projecting into the path of the downward move- I ment of the, driver drive a staple.

10. A stapling machine, as claimed in claim 1, in which the part which carries the anvil is slotted when the latter is actuated to longitu'dinally thereof and the anvil has a stud I projecting through said slot, and a'thumb screw adjustable over-the stud and against the anvil; the latter having spaced sets of dies in its surface to register with the staple. k

11. A stapling machine, as claimed in "claim 1,

in which said clip urging means includes aslide in said magazine and a latchfor said slide. to ening a magazine constructed to receive and progage the magazine and hold the clip urging means in retracted position and the staples tree of any tension to feed them toward the driver.

12. A stapling machine, as claimed in claim 1, in which the magazine has a delivering and receiving end for the staples and including a spring operated hinged gate for closing said delivering and receiving end of the magazine, and a projection arranged in advance of the gate to deflectthe staples which may unintentionally be ejected from the magazine when the gate is open.

' 13. In a stapling machine, the combination of l resist projection oi! the staples beyond the end of the arm, and a driver at the end oi. the lower arm operated by said mechanism and movement of the arms toward each other to pick of! a single staple and drive it through the material to be engaged, and an anvil operated by said mechanism in the path of the staple beneath the driver to turn the ends or the driven staple.

14. In a stapling machine, a combination of a pair of arms and a iever-and-link mechanism pivotally associated with the arms, the lower arm forming a magazine to receive and deliver staples from the same end, a spring to feed the staples, a reciprocating plunger operating at the delivery end oi the lower armand having connection with said mechanism to reciprocate with the movement of the arms toward each other, a driving blade carried by the plunger to engage the foremost I staple fed into delivery position and move ,it downwardly to pierce the material to be attached, and an anvil movably positioned beneath the magazine and operable under the control of said mechanism to move upwardly-in the directionoi the magazine before theplunger starts downwardly to drive the staple against the anvil. V

'15. A staplingmachine oi the plier type, comprising a pair of arms relatively movable toward each other to drive a staple, the lower arm formvided with means to deliver staples at the same end, a spring to feed the staples into delivery position, the delivery end of the lower arm having a reciprocating plunger with a driving blade to drive the foremost staple fed into delivery position, a bracket attached to the lower arm and having an anvil supported beneath the driver to clinch. the ends 01' the staple during its downward movement, said bracket having arms ex-.'

tending upwardly of the lower arm and pivotally supporting one end of the other arm, a system of links between the arms of the bracket, the plunger, and the second arm whereby relative movement of the arms toward each other will first move the anvil toward the magazine. and in line with the staple and then operate the plunger downwardly to drive the staple against the anvil to clinch its ends. a I

16. In a stapling machine, a pair of arms relatively movable toward each other, a bracket piv otally connected to both of said arms, a hous 'g carried by one of said arms, a plunger movable in said housing, a staple driver operated by said plungezylinks interconnecting said plunger with said bracket and with the' other of said'arms, whereby said driver is actuated to drive a staple when said arms are moved relativelytoward each other. r i

17. In a stapling machine, a pair of arms relatively movable toward each other, a bracket pivotaliy connected to both of said arms, a housing carried by one oi. said arms, a plunger movable in said housing, a stapledriveroperated by said plunger, ,link's interconnecting said plunger with 5 driver, said anvil having permanent and temporary staple-clinching dies and movable with relation to the driver for selectively positioning either of said dies tor coaction with said driver in clinching a staple.

18. In a stapling machine, a pair of arms rela- 1 tively movable toward each other, a bracket pivotally connected to both of said'arms, a housing carriedby one of said arms, a plunger movable in said housing','a staple driver operated by said plunger, links interconnecting said plunger with said bracket and with the other of said arms whereby said driver is actuated to drive a staple when said arms are moved relatively toward each other, and an anvil carried by said bracket and movably positioned below said housing-carrying arm and in the path of said driver, said bracket being operable under the control of said levers to move said anvfl toward said housing-carrying '19. In a stapling machine, a pair of arms relatively movable toward e'achother, a bracket pivotally connected to both of said arms, a housing carried by one of said arms, a plunger movable in said housing, a staple driver operated by said plunger, links interconnecting said plunger with said bracket andwith the other of said arms "whereby said driver is actuated to drive a staple when said arms aremoved relatively toward each other, and an anvfl carried by said bracket and movably positioned below said housing-carrying arm and in the path 01' said driver, said bracket being operable under the control of said levers to' 5 move said anvil toward said housing-can'ying arm. said anvil having permanent and temporary staple-clinching dies and movably "mounted in said bracket for selectively positioning either of said dies for coactionwith said driver in clinching a staple.

20. In a staplingmachine, a pair of arms relatively movable toward each other, a'bracket pivotally connected to both of said arms, a housing carried by one of said'arms, a plunger movable in said housing. a staple driver operated by said plunger, links interconnecting said phmger with said bracket and with the other of said arms whereby said driver is actuated to drive a staple when said arms are moved relatively toward each other. and a spring engaging said bracket to resiliently oppose the relative movement oi said arms toward each other. w

21. In a stapling machine, a pair of'arms relatively movable toward each other, a bracket pivotally connected to bothoi said arms, a housing carried by one of said arms, a plunger movable in said housing, a staple driver operated by said plunger, links interconnecting said plunger with said bracket and with the other of said arms whereby said driver is actuated to drive a staple when said arms are moved relatively toward each other. and a spring in. said housing resiliently opposing the'movement of said plunger when said arms are moved relatively toward each other.

22. In a stapling machine, a pair oiarms relatively movable toward each other, a housing carried by one of said arms, a plunger and a staple said arms toward each other actuates said plunger and the staple driver carried thereby.

23. In a stapling machine, a pair of arms relatively movable toward each other, a housing carried by one of said arms, a plunger and a staple driver carried thereby movable in said housing, a lever pivotally connected to said arms, a first link pivotally connected to said plunger, a second link pivotally connected at one end to said first link and at its other end to said lever, and a third link pivotally connected to said second link intermediate the ends of the latter and to one of said arms whereby relative movement of said arms toward each other actuates said plunger and the staple driver carried thereby, and a jaw carried by said lever and movably positioned adjacent said housing-carrying arm to clamp the material to be stapled between said jaw and said housing- .carrying arm.

24. A stapling machine as defined by claim 23, in which said jaw comprises a staple clinching anvil. r

25. In a stapling machine, a pair of arms relatively movable toward each other, a housing carried by one of said arms, a plunger and a staple driver carried thereby movable in said housing, a lever pivotally connected to said arms, a first link pivotally connected to said plunger, a second link pivotally connected at one end to said first link at its other end to said lever, and. a third link pivotally connected to said second link intermediate the ends of the latter and to one of said arms whereby relative movement of said arms toward each other actuates said plunger and the staple driver carried thereby, and a jaw carried by said lever and movably positioned adiacent said housing-carrying arm to clamp the material to be stapled between said jaw and said housing-carrying arm, said Jaw comprising a staple-clinching anvil, and operable under the control of said arms and said lever and links to move into clamping position before said plunger is operated to actuate said staple driver to drive the staple through thematerial. V

26. In a stapling machine, a pair of armslrelatively movable toward each other, a housing carried by one of said arms, a plunger having a staple driver movable in said housing, a lever pivotally connected to said housing-carrying arm and having an anvil supported beneath the driver to clinch the ends of the staple, said lever having upwardly extending arms and pivotally connected to one end of the other of said relatively movable arms, and a system of links between the arms of the lever, the plunger and the second arm, whereby relative movement of said arms toward each other will first move the anvil toward the housing-carrying arm and then operate the plunger downwardly to drive the staple downwardly against the anvil to clinch its ends.

27. In a stapling machine of the plier type, a pair of arms relatively movable toward each other, a staple driver and an anvil movably carried by one of said arms and operable by relative movement of said arms toward each other to approach each other for clinching a staple, 9.

bracket in whichsaid anvil is mounted pivotally connected to both of said arms, and a flat spring secured to said anvil carrying arm and engaging said bracket to resiliently oppose the relative movement of said arms toward each other.

28. A stapling machine as defined by claim 2'7, in .which said spring is pivotally mounted on the anvil carrying arm.

29. A stapling machine as defined by claim 27,

31. In a stapling machine, the combination of a pair 01 arms relatively movable toward each other and a system of levers pivotally associated with the arms, one of said arms forming a magazine to receive and deliver staples from the same end, a spring to project the staples, means to prevent the staples from being projected beyond the delivery end of the magazine, a reciprocating plunger operating at the delivery end of the magazine and having connection with the system oi levers to reciprocate with the movement of the arms toward each other, a driving blade carried by the plunger to engage the staple at the end of the magazine and move it downwardly to pierce the material to be attached, and an anvil in the system of levers beneath the magazine to move upwardly in the direction of the magazine before the plunger starts downwardly to drive the staple against the anvil.

32. In a stapling machine, the combination of a pair of arms relatively movable toward each other and a system oflevers pivotally associated with the one of said arms comprising a magazine to receive and deliver a clip of staples at one end thereof, means to urge the clip toward the delivery and receiving end of the magazine,

a driver at said end 01' the operated by the system of levers to pick oil a single staple and drive it'through the material to be engaged,

a gate for the delivery and receiving end oi the magazine, means within the magazine and i'rlctionally engaging between the end staples of a clip to oppose continued forward movement of the by the system 01' lovers to pick off a single staple and drive it through the material to be eng ged, a. lever pivoted within the magazine and having a barb to engage between adjacent staples of the clip, a spring to urge the lever upwardly and the barb into frictional engagement with the staples, the end of the lever projecting into the path of the driver when the latter is moved: downwardly to drive a staple, and an carried by the system of levers in the path or the staple beneath the driver to turn the ends.

34. In a. stapling machine, the combination of a pair of arms relatively movable toward each other and a system or levers pivotally associated spam-101 with the arms, one of said arms comprising a magazine to receive and deliver a clip of staples at one end thereof, means to urge the clip toward the delivery and receiving end of the magazine, a driver at said end of the magazine operated by the system of levers to pick oil. a single staple and drive it through the material to be engaged, a projection arranged in advance of the gate to deflect the staples which may unintentionally be ejected from the magazine when the gate is opened, and an anvil carried by the system of levers in the path of the staple beneath the driver to turn the ends.

35. In a stapling machine of the plier type, a pair of arms relatively movable toward each other,

- a staple driver and an anvil movably carried by one of said arms and operable by relative movement of said arms toward each other to approach each other for clinching a staple, a bracket in which said anvil is-mounted pivotally connected to both of said arms, and resilient means secured to said anvil carrying arm and engaging said bracket to resiliently oppose the relative movement of said arms toward each other.

36. A stapling machine as defined by claim 35, in which said resilient means is pivotally moimted on the anvil carrying arm.

3'7. In a stapling machine, a pair of arms relatively movable toward each other, a bracket pivotally connected to both of said arms, a housing carried by one of said arms, a plunger movable in said housing, a staple driver operated by said plunger, links detachably interconnecting said plunger with said bracket and with-the other of said arms whereby said driver is actuated to drive a staple when said arms are moved relatively toward each other, and a spring in said housing resiliently opposing the movement of said plunger when said arms are moved relatively toward each other.

38. In a stapling machine, a pair of arms relatively movable toward each other, a housing carried by one of said arms, a plunger and a staple driver carried thereby movable in said housing, a lever pivotally connected to said arms, a first link pivotally and detach'ably connected to said munger, a second link pivotally connected at one end to said first link and at its other end to said lever, and'a third link pivotally connected to said second link intermediate the ends of the latter and to one of said arms whereby relative movement of said arms toward each other actuates said plunger and the staple driver carried thereby.

39; In a stapling machine, a pair of arms rela tively movable toward each other, a housing car-- ried by one of said arms, a. plunger movable in said housing, a staple driver operated by said plunger, a pin extending transversely of said plunger, and means detachably connected to said plunger and actuated by the relative movement oi! said arms toward each other to operate said plunger, said means including links removably en agin sa 40. In a stapling machine, a pair of arms relatively movable toward each other, a housing carried by one of said arms, a plunger movable in said housing, a staple driver operated by said plunger, a pin extending transversely of said pllmger, and means detachably connected to said plunger and actuated by the relative movement of said arms toward each other to operate said plunger, said means including links having slotted ends removably engaging said pin.

WILLIAM DRYPOLCI-IER.

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