US2795787A

US2795787A - Fastener applying device

Info

Publication number: US2795787A
Application number: US347718A
Authority: US
Inventors: Herman J Spencer
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-04-09
Filing date: 1953-04-09
Publication date: 1957-06-18
Anticipated expiration: 1974-06-18

Description

June 18, 1957 H. J. SPENCER 2,795,787

FASTENER APPLYING DEVICE Filed April 9, 1953 4 sheets-sheet 1 June 18, 1957 H. J. SPENCER FASTENER APPLYING DEVICE 4 Sheets-Sheet 2 Filed April 9, 1953 INVENTOR.

June 18, 1957 H. J. SPENCER FASTENER APPLYING DEVICE 4 Sheets-Sheet 3 Filed April 9, 1955 1N V EN TOR.

June 18, 1957 H. J. SPENCER 2,795,787

FASTENER APPLYING DEVICE Filed April 9, 1953 4 Sheets-Sheet 4 INVENTOR.

nited StatCS Pat-ent FASTENER APPLYING DEVICE Herman J. Spencer, Ingomar, Pa.

Application April 9, 1953, Serial No. 347,718

6 Claims. (Cl. 149) This invention relates generally to improvements in stapling machines and more particlarly to the type of stapling device held and supported in the hand of the operator and actuated by a gripping movement thereof.

One object of the invention is to provide a better means for connecting the driver and its actuating means wherein there will be no chance of the relatively thin driving .blade becoming bent during the driving of staples.

Another object of the invention is to provide a pivotally mounted staple support member which is of rigid con- ;struction and therefore will give a more positive support :as it travels with a staple as the latter is driven.

A further object of the invention is to provide an 'implement of the type described wherein on manual operation, the jaws are moved to grip the material without .the usual necessity of having the hand lever pivot, there- .by providing Imeans whereby the jaws can be opened `.wider for insertion of material and to provide a machine .in which longer legged staples can be used.

Other objects of the invention reside in certain novel .side of the staple magazine so as to enable the operator ;to retract the staple feeding means when loading of .the

`device is desired.

A still further object of the invention is to provide a better arrangement of the parts and their relation to each tother for reciprocating the driver and for urging the device to grip material to be stapled.

In the accompanying drawings which illustrate a present preferred embodiment of my invention- Figure 1 is a sectional view in side elevation showing a stapling machine embodying one arrangement of the operating levers in starting position with the driver in raised position;

Figure 2 is a View in side elevation showing the device in Figure l with the jaws as having moved towards each other;

Figure 3 is a sectional view taken through Figure l at III-III to illustrate the method by which the upper end of the driver blade is secured to a tube type driver head;

Figure 4 is a view in side elevation showing the device in Figure 2 with the jaws completely closed and the driver as having been lowered to drive a staple;

Figure 5 is a cross-section of Figure 2 at V-V to illustrate how the actuating lever rests on an extruded portion of the magazine frame member;

Figure 6 is a plan view of the slotted tube used to retain the driver blade in engagement with the driver head Figure 7 is an end view of Figure 6;

Figure 8 is a side elevation of a modified construction shown in Figure 1, illustrating the parts in their starting position with the driver in lowered position relative to the frame member, and with an upper pivoted hand grip member resting on the magazine frame member;

Figure 9 is a view in side elevation showing the device 'in Figure 8 with the jaws having been movedtowards Patented June 18, 1957 2 each other land the driver as having been raised in relation to the magazine frame member; g

j Figure 10 is a front view and Figure 11 is a side elevation ,view of the rigid type staple support member;

Figure 12 is a plan view and Figure 13 is a side elevation View of the driving blade;

Figure 14 is a front elevation of the machine head and Figure l5 is a sectional side elevation view of Figure 14.

Figure 16 is an enlarged central sectional view of the driver assembly parts shown in Figures 1. and 3;

Figure 17 is a view in side elevation showing the device in Figure 2 with the actuating lev'er as having been raised upwardly to give access to the staple feeding pusher;

Figure 18 is a partial side elevation of Figure 8 showing the hand-grip part as having been swung from its overlying position over the staple guiding track to a position which gives access to the staple guiding track;

Referring to the drawings, and particularly to Figures l, 2 and 3, the stapling machine comprises generally a magazine frame member 1 which carries a staple ejection chute at its free end and means for feeding staples to the ejection chute and a reciprocably mounted driver assembly 5 to be described later for ejecting the staples S.

An anvil member 2 carries a staple clinching means 80 on its free end, the latter being movable towards the free end of member 1 to grip material there between and to clinch a staple S driven from the ejection chute 8.

A driver actuating lever 3 is connected to rigidly reciprocate the driver assembly 5 and to urge the free end of magazine frame member 1 towards the free end of the anvil member 2 by action of a hand lever 4 pivoted to the anvil member 2 on shaft 43 and through links 6 which connects the hand lever 4 to the actuating lever 3. The magazine frame member 1 and the anvil member 2 are pivoted in relation to each other adjacent their opposite ends by pin 3S. See Figures 1, 2 and 4.

The magazine frame member 1 (Fig. 5) is comprised of an elongated U-shaped frame which has a web 9 integral with spaced apart, aligned and upwardly extending side anges 9a and the latters one ends are formed towards and in alignment with each other to provide spaced apart transversely extending vertical anges 10 with the latters aligned vertically extending edges 10a forming the sidewardly walls of the ejection chute 8. The opposite ends of flanges 9a of the magazine frame member 1 are pierced to receive pin 38 and at a point between their ends, anges 9a have aligned shoulders 41 extending a short distance transversely outwardly to provide a seat for lugs 39 of the actuating lever 3. See Figures l, 3 and 5.

A U-shaped head portion 11 (Figures 14 and 15) has a central web 13 integral with side-portions 12 and the latter at their lower ends are secured to the outward vertical sides of the frames anges 9a at a point adjacent the latters transversely formed flanges 10; side-portions 12 of the head 11 contain aligned closed end elongated slots 26 which extend vertically above the frames flanges 9a to provide a guide for a driver assembly 5. The lower portions of the sides 12 of the head 11 are formed inwardly towards each other and are spaced apart to form vertical flanges 50 and the latters rearward surfaces 50a act as the front wall of the ejection chute 8. See Figures 1, 3, 14 and l5.

An elongated U-shaped staple guide 7 has the outside surface ofrits web83 secured centrally tov the inside surface of the frames web 9 (see Figure 5) and the upper edges 85 of the vertical flanges 84 of the staple guide 7 form a track upon which the staples S ride in straddle fashion to the ejection chute 8. See Figures l and 5.y Extending longitudinally, overlying and spaced apart from edges 85 of the staple guide 7 are hold-down members 49, as disclosed in my application No. 305,943,

ent No. 2,755,473 on July 24, 1956, which are adapted l to move transversely from overlying the staple guide 7 to a position which exposes the staple guide for loading or removal of staples. See Figures l and 5.

A pulley wheel 14 is mounted on pin x1-5 which is supported in "apertured openings in the iianges 84 yof the staple guide 7 at a point near the one end of staple guide 7 which terminates at the 'ejection chuteS. A feeder spring 16 is passed around pulley 14 and has 'one end secured to a lug 17 which extends upwardly from the web portion 83 of staple guide 7 and its other end secured to a lug 18 which extends downwardly from the web loff the inverted U-shap'ed staple pusher 19, the latter being urged by the pull of spring 16 to feed the staples S towards the ejection chute 8.

The actuating lever 3 is an elongated inverted `U shape, has a web portion 81 used as a hand-.grip which is integral with downwardly extending flanges 82. At one "of their ends iianges -82 are adapted to be connected to operate the driver assembly and adjacent their opposite ends flanges 82 ofthe actuating lever 3 have downwardly extending curved lugs 39 for slidably mounting the actuating lever 3 on Vthe magazine frame 1 to urge the latter towards the anvil lever 2. Aligned holes are pierced intermediate the ends of liianges 82 of the actuating lever 3 to receive rivets 45 for connecting links 6 to lever 3. See Figures l and 2.

The anvil member 2 is U-shaped in cross-section, it has a web 2a integral with side walls 2b, the latter are pierced at their opposite ends to receive pin 38 and walls 2b are pierced intermediate their ends to' receive pin 43. An anvil 80 is secured to the one end of member 2 for clinching a staple and gripping material.

The manually operated hand lever 4 shown in Figure l is of channel shape in cross-section with its rearward portion formed with a rounded bottom wall 4b providing a hand-.grip and its forward side walls 44 extending upwardly at an angle to adapt them to straddle the sides of the anvil member 2. A cross-pin 43 projects through and beyond holes in the sides 2b of the anvil member 2 and into the side walls 44 of the `hand lever l vfor pivotally mounting the latter on the anvilrmember 2. The upper ends of the side walls 44 are pierced to Vreceive rivets 46v'for pivotally connecting lever 4 to the opposite ends of links 6. See Figure 1.

The driver assembly '5 comprises a cylindrical tube-like driver head 23 containing a slot -25 which extends along the length of its diameter and has a hole l24 pierced centrally in its diameter opposite from its slot u2S. ASee VFigures ll, 3 andfZO. A driving'bla'de retainer 27 is a zexible cylindrical tube containing a slot 30 which extends along the length of `its diameter and centrally located along one side of its slot 30 is a lug V29 which protrudes into slot 30. A hole 28 is pierced centrally at a point on the ldiameter of the driving blade retainer 27 opposite the latters slot 30. See Figures 6 and 7. A driving blade 20 is prefer'- ably made from at sheet metal, is rectangular in shape, has a centrally located lug 2Y1extending from one of its short lsides and has a hole 22 pierced centrally along its length a short distance from lug 21. See Figures l2, 13 and 20. 4It will be notedin Figure 3 that the-driver head 23 is of greater length than the driving blade retainer 27 `for reasonsA to be explained.

The parts of the driver assembly listed above are assembled together as follows: The outside diameter of the driver head 23 (Fig. 20) 'is approximately the same as the inside diameter of the exible driving blade retainer 27. The 'driver head 23 is inserted inside of the driving blade retainer 27 with their respective slots and centrally located holes in alignment with each other. The driver blade 20 is :forcibly inserted liatwise by its lug 21 and into slots 30 of the blade Vretainer 27 and thereby wedges past the latters lug 29 totherebyslightly expand the diameter of the blade retainer-27. The blade 20 is moved further, through slot 25 in the driver head 23 until lug 21 of the driver blade 20 is in

holes

24 and 28 in the driver head 23 and the blade retainer 27 respectively and lug 2l of the driver blade 20 thereby prevents lengthwise movement between the driver head 23 and the blade retainer 27. See Figure 3. When lug 21 of the driver blade 20 has entered

holes

24 and 28 as explained above, the lug 21 end of the driving blade 20 rests against the inside diameter of the driver head 23 and hole 22 of the driver blade 20 is lined up with and receives lug 29 of the blade retainer 27 as the latter springs back toits unsprung diameter. Lug 29 of the blade retainer 27 thereby holds the driver blade 20 in proper alignment relative t'o the driver head 23. See Figures l, 3 and 20.

When in the device, the length of the driving blade retainer 27 extends transversely in a horizontal plane between the side portions 12 of the head 11 to be limited thereby from moving transversely in the device. See Figure 3. The driver head 23 extends transversely from thel 'center of the device through and beyond the `closed end slots 26 of the side portions 12 to be guided thereby during vertical movement. The portions of the driver head 23 which extend beyond the side portions 12 of the head 11 are entered into openings in flanges 82 of the actuating lever 3 and the latter through its movement Ythereby reciprocates the driver assembly 5 in relation to the magazine 'iframe member 1 when a fastener is to be applied. See Figures 2, 3 and 4.

The manner in which the anvil member 2 and the magazine frame member 1 are moved to grip the material and the assembled driver 5 is lowered in relation to the magazine frame member 1 to secure a staple in the material is shown in Figures l, 2 and `4 but will be de scribed later.

While the retainer 27 is described as being made from 'resilient'material 'and containing a lug 29 along one redge protruding into its slot 30 for engagement with hole 22 of the driver blade 20 to retain the latter in engageme'nt -with the driver head 23, it will be apparent that a lug similar to lug 29 could be added to the driver head 23 t'o `retain the driver blade 20 in engagement with the driver vhe'atzl 23.

The staple .support member 31 shown individually in Figures l-10 and v11 is preferably made from `liat sheet metal. As shown in Figures l and l0, the staple support 'member 31 has its upper end formed into a hook 32, downwardly Vfromitshoolr 32 and formed forwardly is a bump section 33, slightly below its bump 33 are angled iianges V3'4 which extend forwardly at a downward angle and still further downward from its angled iianges 34 it has a toe 35 which extends horizontally ytowards the opposite end of the device. The toe 35 of the staple support member `31 is adapted to kfit between the legs to contact and 'thereby rigidly support the underside of the crown of a staple as the latter'is sheared from a stick of staples and .thereafter ejectedfrom the device into material. In the starting position shown in -Figure l, the driver assembly S is in raised position relative to the magazine yframe 1 and a staple S has been fed into the ejection chute 8 slightly beneath the driving blade 20 ofthe driver assembly 5. The hook 32 of -the staple support member v31 is tted over and extends half-way downwardly around the driving blade retainer 2'7 of the driver assembly 5 and the toe 35 of staple support member'3`1 is 'between the legs and under the crown of the staple S. The bump section 33 of the staple support member-31 is against the rearward vertically extending side 13a-of web 13 ofthe head member 1l to .prevent the staple support member 31 from pivoting .clockwise on the assembled driver 5 to thereby retain the 1toe.35 oil-.the staple support member '31 in staple supporting position. 'See Figure l.

When `thedriver vassembly "Sis moved vertically downward in `relation to the magazine frame member 1, the

following results: The driver .blade 20 of the driver assembly `almost immediately contacts the upper 'side of the crownY of the staple S and urges the latter vertically fdownward into almost immediate contact with toe 35 of staple support member 31. In the latter position, the driving blade retainer 27 of the driver assembly 5 has moved downwardly slightly way from contact with that portion of hook 32 of the staple support member 31 which was fitted over the driving blade retainer 27. Further downward movement of the driver assembly 5 moves the staple S and thereby the staple support member 31 through the latters toe 35 vertically downward .with the bump section 33 of the staple support member 31 rubbing the vertically extending side 13aY of web 13 to thereby hold toe 35 of staple support member 31 in staple supporting position. Note in Figures 4 and 15 that web 13 of head 11 is angled forwardly and downwardly at 13b to provide space into which bump 33 of the staple support member 31 can move to allow the latter to pivot clockwise on the driver assembly 5 as the latter nears the end ofvits downward movement during. the ejection of the staple Also note in Figures 4, 14v and 15, that the upper edges 40 of llanges 50 of head 11 are adapted to be contacted by the angled anges 34 of the staple support member 31 as the latter is moved downwardly to thereby pivot the staple support member 31 in relation to the driver assembly 5. As the driver assembly 5 moves downwardly near the end of its downward movement to eject the staple S, flanges 34 of the staple support member 31 contact edges 40 of anges 50 of head 11 and thereby pivot the staple support member .31 clockwise in relation to the driver assembly 5 to 'thereby move toe 35 from its staple supporting posiation and to move bump 33 into the space provided by the angled end 13b of web 13 of head 11. After toe 35 of :staple support member 31 has been moved from its staple supporting position, the driver assembly 5 continues to move a short distance further downwardly to completely eject the crown of the staple S past toe 35.. See Figure 4.

As the driver assembly 5 is moved upwardly from the position shown in Figure 4 to that shown in Figure l, the following takes place: The driver assembly 5 moves upwardly a short distance into contact with that portion of hook 32 of the staple support member 31 which was fitted over the driving blade retainer 27 of the driver assembly 5 and thereby moves the staple support member 31 upwardly. As the staple support member 31 is moved upward, as just described, the latters bump 33 contacts the angled section 13b of web 13 of head 11 to thereby pivot the staple support member 31 counterclockwise in relation to the driver assembly 5 to thereby move toe 35 of the staple supporting member 31 into staple supporting position. When the driving blade 20 of the driver assembly 5 has been raised completely to the position shown in Figure 1,l the sidewardly extending ends 35a of toe 35 of staple support member 31 are adapted to contact shoulders 36- of tlanges 50 of head 11 to stop upward movement of toe 350i the staple support member 3l to position the latter so a staple S can be fed into the ejection chute 8. See Figures 1, 3, 14 and 15. Y Y

Referring to the apparatus shown in Figures 1, 2, 4 and 18: In Figure 1, the starting position, the anvil member 2 and the magazine frame member 1 have their free ends spaced apart with their opposite ends pivoted together by pin 38. The driver assembly 5 is in raised relation in the magazine frame member 1 and a staple S has been fed into the ejection chute 8 beneath the driving blade 20 of the driver assembly 5. One end of the actuating lever 3 is pivotally connected to the driver head`23 of the driver assembly 5 to reciprocate the ,latter` and lugs 39 of the actuating lever 3 are slidably resting on the shoulder portions 41 of the magazinerframe member 1 to rigidly urge the latters free end towards the free end of the anvil member 111e lever 4 is pivoted on the anvil member 2 intermediate' the latters ends by pin 43 to thereby urgethe free end of the anvil member 2 towards the free end of the magazine frame member 1 to grip material and clinch a staple. The side walls 44 of the hand lever 4 extending upwardly along both sides of the device are pivotally connected to the rearwardly positioned ends of links 6 by rivets 46. l The forwardly yends of links 6 are pivotally connected to the actuating lever 3 at a point between the latters ends by rivets 45. Note in Figure 1 that rivets .46 connecting vthe side walls 44 of the hand lever 4 to the rearwardly ends of links 6 are positioned between pin 38 and rivets 45 close by an imaginary line extending substantially longitudinally `of the device through pin 38 and rivets 45. Also jnote in Figure 1 that pin 43 connecting the hand lever.4rto the anvil member 2 is a distance vertically below the above-mentioned imaginary line and it will be apparent that pressure applied on the hand lever 4 `to rotate the latter counter-clockwise on pin 43 `will be transmitted in substantially a longitudinal direction along saidimaginary line to links 6 and then to the actuating lever 3 through

rivets

46 and 45. As longitudinal movement of lever 3 and links 6 is not possible nor desired, the hand lever 4 is thereby stopped from rotating counter-clockwise on pin 43. However, manual pressure .applied on the handgrip portion of the actuating lever 3 and the hand lever 4 will bodily move the latter upwardly and thereby the free end of the anvil member 2 through pin 43 is moved upwardly towards the free end of the magazine frame member 1 with rivets 46 moving away from said imaginary line of pressure upwardly in an arc around rivets 45. See Figure 2.

Continued manual pressure on the device after the parts have reached, the positions shown in Figure 2 will result as follows: The free end of the anvil member 2 will continue to move as before towards the free end of the magazine frame member 1 until said free ends are stopped by contact with each other or by contactv with material placed therebetween. However, when movement of said free ends towards each other is stopped as described above, the hand lever 4 can now rotate counter-clockwise on pin 43 and does so to thereby direct pressure at an angle across said imaginary line to rivets 45 via links 6 and rivets 46 to thereby transmit pressure applied to hand lever 4 to the actuating lever 3 to thereby move the latter downwardly in fastener applying direction. The pressure transmitted to the actuating lever 3 as just described is partly transmitted'to the driver assembly 5 to actuate the latter to apply a fastener and the balance of the pressure so applied to lever 3 is transmitted via the latters lugs 39 to shoulders 41 of the magazine frame member 1 to urge the latters free end to grip the material. See Figure 4. lIt will be noted in Figure 4 that during the final movement of the parts as described above, rivets 46 have moved further in an arc around rivets 45 to position the latter between rivets 46 and pin 43 to thereby greatly increase the leverage advantage of the hand lever 4 during the fastener applying operation of the device. n f

Spring 37 extends vertically and it is positioned rearwardly from pin 38, the latter being' the pivotof the magazine frame member 1 with the anvil member 2, spring 37 has one end attached to the rearmost end of the actuating lever 3 and has its other end detachably held by lug 42 of the anvil vmember 2 to thereby rock the actuating lever 3 on the latters lugs 39 to move the one end of lever 3 upwardly in relation to the magazine frame member 1 to the limit provided by the driver assembly 5 contacting the uppermost ends of the closed end slots 26 in head 11 of the magazine frame member 1, to thereby retract and thereafter retain the assembled driver 5 in raised relation to member. land to ,urge the Notice in'Figures 1, Zand 4 that the anvil member 2 has notches 47 adjacent the pivot pin 38 of the magazine frame member 1 and the anvil member 2 and that projections 48 on the magazine frame member 1 are adapted to contact notches 47 of the anvil member 2 to limit the distance the free ends of the device can move apart.

Figure 18 illustrates the device shown in Figure l with the one endV of spring 37 as having been removed from lug 42 ofthe anvil member 2 with the actuating lever 3 las having been pivoted counter-clockwise on the driver assembly to thereby raise the opposite end of the actuating lever- 3 in relation to the magazine frame member l'to thereby expose the latters staple guiding and feeding means to` provide access to the latter.

A modified form of the device is shown in Figures S and 9. The magazine frame member 76 and anvil member 77 are pivoted together by pin 90 and said members contain the usual apparatus such as a staple clinehing means, a stapple driver, staplefeeding means, staple ejection chute etc. The driver actuating levers 51which extend along both sides of the device, are pivoted on the common pivot pin 90 and therefore levers 51 do not transmit pressure to urge either of the members to grip the material. The arms 86 of the hand lever 78, employed in Figure 8, are pivoted to one end of

links

5,4 by rivets 93, links 54 are pivoted at their opposite ends, by rivets 92, to the driver actuating levers 51 to actuate the latter, and slots 52 of the driver actuating levers 51 slidably connect the latter levers to the driver assembly 87 to reciprocate the latter. It will be noted in'Figures 8 and 9 that operation of lever 78 will move the anvil Aarm 77 towards the magazine l and that continued movement of lever 78 would lower the actuating levers S1 in a mannerisimilar to the device shown in Figures l, 2 and 4 to lower the driver. However, to apply pressure on the magazine frame member 76 I employ a hand-grip lever 55 pivoted on pin 90 and it has transversely extending flanges 56 which, inthe operative position shown in Figure 8, rest on the upper edges 94 of the side-walls 95 ofthe magazine frame member 76 at a point between the pivot of the members with each other and the ejection chute end of the magazine frame member 76, for transmitting manual pressure applied on hand-grip lever SS to` the magazine frame member 76, to urge the latter members free end towards the anvil member 77, to grip one sideof material,

Hand-grip lever 55, can be pivoted at least 180 clockwise on pin 90 to move the hand-grip portion of lever 55 from overlying thestaple magazine to-give access to the latter yfor lretraction of the staple pusher and loading of staples as shown in Figure 18.

In. Figure 8, around pin 9.1 is coiled a spring 58, and has one-ofits legs. 59 pressing against the inside portion of the webof the anvil member 77 and its other legV 60 pressingl against the under-side of the magazine frame member 76 for urgingthe members apart and thereby urgiing the hand lever 78 to pull links 5410 the starting position shownin Eigure 8 after a staple has been driven as explained above.

I claim:

1 In a fastenerdevice, a frame, a staple guide in said frame for guiding staples, a driving 4channel at one end of said guide,` means iny said frame for feeding staples along said guide to said driving channel, a staple driver, means mounting-'said driver fori-reciprocating movement in said driving channel, aV movable rigid staple supportmernber having a toe portion extending toward the other end of said guide into position, between the legs and under the crown of a staple fedv into said driving channel, connector means between said ldriver and said staple support member adapting1 the` latter tov-pivot and move bodily in relation, to Said driver and for movingsaid staple'support memberinmeverse fastener applyingdireetion, means on said frame for limiting said upward movement of said ,l frame member 1 andanvil member 2 apart Se@ Figures 1 and 4 driver and saidstaple support member in relation to said frame to thereby retain said staple support members toe portion in proper position to receive a fed staple, limited guiding means on said frame for engaging said support member to holdthe latters toe portion in staple supporting position under the crown of a staple as said driver moves said staple in fastener applying direction and to thereby move said support member in the fastener applying direction, obstruction `means on'sfaid frame, cam means on said support member adapted to contact said obstruction means as said support member is moved by said staple and the staple by `said driver for pivoting said support member on said driver to shift the toe portion of said staple support member from its staple supporting position, thereby permitting said driver to move relative to said staple support member to complete the driving of said staple, cooperating means between said support member and the end of the latters limited guide means on said frame for obstructing upward movement of said support member when said driver is retracted upward adjacent to the limit permissible between the latter and said support member said cooperating' means at the end of said guide on said frame adapted tol cooperate with said support member to move the latters toe portion towards the other end of said guide and thereby into staple supporting position as said support member is raised by said Idriver. Y

2.A in a fastener applying device, `a magazinefrarne member containing a driving channel and means for gripping one side of material at its free end, an anvil member having means for gripping the opposite side of said material land for clinching a lstaple on its free end, pivotal connector means between said members to permit said free' ends of said members to move towards each other to grip material to be stapled, means for feeding staples to said `driving channel in said magazine frame member, a staple driver, means mounting said driver for reciprocating movement in said magazine frame member, an actuating lever operably connected to said driver to rigidly reciprocate the latter and shiftable connector means between said vactuating lever and one of said membersadapted to rigidly transmit a part of the pressure applied on said driver-member actuating lever to one of said members to rigidly urge a free end of one of said members to grip one side of material, a hand lever pivoted onthe opposite member for rigidly urging the l-atters free end to grip the opposite side of said material, operable connector meansl between said hand lever and said actuating lever adapted to rigidly transmit pressure applied on said hand lever to said actuating lever at a point intermediate the latters connections with said driver and said` one member to thereby rigidly transmit a part of pressure applied on said hand lever to said actuating lever to urge the latter to rigidly reciprocate said driver and to rigidly move the free end of said one member to grip one side of said material and the balance of the pressure so applied actingtogurge the free end of said opposite member to rigidly grip-the opposite side of said material.

3. In a stapling machine, a driver head containing a slot on one of its sides Whichextends along its length, c0- operating retaining means including a resilient means on said-driver head, a driver blade in said slot, said` resilient means acting to retain said driver blade in said. slot.

4. In a stapling device, a pivoted .magazine frame member containing a driving channel and means for gripping oneside of material at its free end, means in said magazine frame member for feeding staples to said driving channel, astaple driver, means mounting said driver for reciprocating movement in said magazine frame member, a pivoted anvil member having'rneans for gripping the opposite side of said materialand for clinching a staple on its free end, pivotal connectormeans-between said member-s adapted to permit at least one of said members free ends to Ibe moved towards said others free end to grip said material there between, an actuating lever pivotally connected at one endfto said `driver to reciprocate the latter and having its opposite end 'pivotally 'mounted on the device adjacent the latters opposite end, a hand lever pivotally mounted on said anvil member, a link pivotally connected to said hand lever and to said actuating lever with the pivotal connections of said link at the beginning of a fastening operation with the free ends of said members spaced apart being along a line which starts at the pivot of said members with each other and extends substantially across the reciprocating path of said driver and thereby pressure applied on said hand lever at said beginning will not permit said hand lever to rotate in relation to said anvil member but will permit said hand lever to be -bodily moved towards said line to thereby move the free end of said anvil member towards the free end of said magazine frame member with the pivot of said link with said hand lever moving away from said line in an arc around said links pivot with said actuating lever to a position in which continued pressure on said hand lever will be directed through said link through the links pivotal connections to said actuating lever in a direction which is at an angle across said line to thereby urge said actuating lever to reciprocate said driver to apply a fastener.

5. A stapling device according to claim 4 characterized by means adapted to be held in one hand and wherein said actuating lever has a hand-grip portion which overlies said means for feeding staples, means in the pivotal mounting of said opposite end of said actuating lever which permits the latter end to be freely raised upwardly in an arc in relation to said magazine frame member to give access to said staple feeding means.

6. A stapling device according to claim 4 characterized -by said hand lever extending below said anvil member to form the lower part of a hand-grip means: an upper hand-grip means overlying said means for feeding staples and it is pivotally mounted by one of its ends on the devices opposite end preferably on the members pivot, abutment means on said upper hand-grip means adapted to rest loosely against said magazine frame member to transmit pressure applied on said upper hand-grip to said magazine frame member to urge the latters free end to grip material, said upper hand-grip member adapted thereby to be pivoted to thereby move its abutment away from contact with said magazine frame member and to move it from overlying said staple feeding means to eX- pose the latter.

References Cited in the tile of this patent UNITED STATES PATENTS 2,461,165 Lindstrom Feb. 8, 1949 2,481,892 Wampler Sept. 13, 1949 2,617,097 Spencer Nov. 11, 1952