US2056480A

US2056480A - Stapling device

Info

Publication number: US2056480A
Application number: US585241A
Authority: US
Inventors: William G Pankonin
Original assignee: ACE FASTENER CORP
Current assignee: ACE FASTENER CORP
Priority date: 1932-01-07
Filing date: 1932-01-07
Publication date: 1936-10-06
Anticipated expiration: 1953-10-06

Description

Oct. 6, 1936.

'w. G. PANKONIN STAPLING DEVICE Filed Jan. 7, 1952 2 Sheets-Sheet l .Patented er., e; 193e f 2,056,4si

r rice iiuilili STAPLENG William G. llanhonin, Ghicago, lill.,

assigner to Aloe Fastener Corporatiomhicaga lill.; a cor poration of illinois 'applicaties January i; resa senat nu einen di. @laluna The present invention relates to a stapling device and particularly to a stapling device suited ior oce use and which may be quickly partly dissernbled for the purpose of employing a staple drivingv mechanism as va taclrer, i, e., without clinching or deforming the staples.

vLihe objects of the present invention include, among' other things, the following:

A simplified base structure; a new proved meansior mounting a staple driving arm upon a base; new and improved means for the quicl; attachment to and detachment from a base of a staple driving part normally used therewith; 'an improved rneans for dete'rinining spring pressure to be applied to a staple driving arm for liiting it away from a base after a staple driv-l ing stroke has been delivered; a novel means for regulating spring tension between angularly disf) posed parts; a new and improved multiple anvil ior a staple driving device; improved means for changing the position oi an anvil upon a stapling device; a slrnplied means for attaching a staple anvil upon a base; simplied and improved structure for an anvil for use in a staple driving machine;l an improved longitudinally movable staple anvil; an improved housing for a staple driver; simplified guide means for a staple driver; novel means for providing a staple driv ing plunger with a retractile spring; unique means for mounting a staple follower spring; improved means for preventing the bridge of a -staple about to be driven from a stapling rnachine from' buckling or bending away irorn the driver while entering material and being clinched; unique means tor freeing a staple driv-- ing device of bent or deformed staples; a stapling device which is free from. clogging; unique means for preventingpartial strokes of the plunger of a stapling device; an improved housing for a staple driving plunger; and means for preventing the twisting of a staple follower block in relation to a spring secured thereto when the spring is freed from the track in which it norrnally operates.

Another object of the invention' is to provide a new form of plunger for a stapling device; also, improved guide means for a plunger; a more open structure `for ai stapling deviceso designed that all of the staples may be removed from the rear of the staple magazine with any small tool or hook should the staples become wedged or tight or fail to feed to the staple'driver; `and a new and novel guide means for a plunger retractile spring.

Other objects of the invention areto provide and une` front end of the anvil'on \of a handle for the device,

(CCB. lil-z3) an improved staple machine head structurereducing the number of parts and simplifying the production and assembly costs tlriereoi;l and a still further object of the invention includes a novel assembly of parts whereby the costof assembling a staple driving apparatus is reduced to a minimum.

These objects, and such other objects as Imay hereinafter appear are obtained by 'the novel structure, unique combination and improvedV arrangement oi the various'"elements oi a stapling machine illustrated in the accompanying two sheets of drawings which is illustrative of the invention. i

in the drawings:

. Figure l is a plan view of a bodying the invention;

Figure 2 is a side elevation oi the machine illustrated in Figure i;

Figure 3 is an irregular horizontal section on g@ the line 3--33 of Figure 2;

Figure 4 is a fragmentary longitudinal section on the line of Figure 3;

Figure 5 is a fragmentary plan view ofthe iront end oi the base on the line ii of Figure Zi; gg

Figure 6 is a transverse section through the the line iiof Figl5 stapling device emure 5; o

Figure 'l is a transversevertical section of one form of headior the device, said section being 3o on the line 'l--li oi Figure; l Figure 8 is a longitudinal section of the form oi head illustrated in Figure 7;

Figure 9 is a transverse section on the line il--t of Figure lil;

Figure l0 is a longitudinal section of the second form of head shown in Figure 9;

Figure ll is a longitudinal section showing one form of means for regulating the angular displacement of the base and the staple driving arm, and means for causing the arm to. rebound from the anvil;

Figure i2 is a transverse section through the parts illustratedlin Figure il;

Figure 13 is a longitudinal section of another 45 form of device regulating angular displacementf of arr-n and base;

Figure 14 is a transverse section of the device illustrated in Figure 13;

Figure l5 illustrates a group of staples as they 5@ are adapted to be deformed in. the device herein illustrated and described; i

Figure 16 isa fragmentary transverse lsection the view being on the line lli-i6 of Figure d;

' are arranged in the top of said base.

Figure 17 is a fragmentary longitudinal section of the base showing-means for attaching the anvil thereto without a spring; and

Figure 18 is a detail in elevation illustrating the key-hole slot structure employed in the magazine beam for rendering it readily detachable.

Like reference characters are used to designate similar parts in the drawings and in the description which follows.

As indicated above, one of the prime objectives or' the present invention is a simpliiication of structure whereby a highly emcient staple driving device possessing all of the advantages of more expensive devices of the same character may be produced at a minimum cost. Each of the parts of the present device, while sturdily made, is of a. design which will permit of its production at a very low cost. Assembly is a very simple undertaking.

Reference will be had first tothe base of the apparatus. The base 20 comprises a. rectangular member of an inverted dish type. It may or may not be supplied with rubber feet, as desired.

In the illustrated form of the device, a multiple seat anvil is adjustably secured to the front end of the base 20. This anvil is further described and claimed in a co-pending application Serial No. 78,301, iiled by William G. Pankonin on May 7,\1936,'for Stapling device. When a single anvil is employed, it comprises a central raised portion in which the staple deforming die is disposed.

The body of such anvil is horizontally disposed to rest upon the top of the base. At the end of the anvil are extensions at ninety degree angles which are adapted to project through longitudinal slots in the" base and to be secured therein by riveting or otherwise.

When a multiple anvil is desired, as illustrated, the base 20 is provided with a plurality of teeth or grooves 2| transversely arranged. Longitudinally aligned T- and U-shaped slots'22 and 23 Slot 22 traverses a part of the grooves 2l. The movable anvil comprises an elevated section 24 having transversely arranged therein a plurality of parallel staple deforming dies 25. Said dies are adapted to register one at a time with a staple driver later to be described..

From the elevated section of the anvil are obliquely disposed extensions, one (26) in the rear of the device and the other (21) in front. The

`rearwardly extending section 26 terminates in a tongue 28 which is vertically disposed and adapted to extend through slot 23 in the base 20 to underpart of said base, but said tongue 28 .is not of sufficient extent to depend below the lower horizontal edge of base 20. At the rear of the anvil is an edge section 2S adapted to ride upon the top of the base 20, the edges being so arranged that ample support for the anvil upon the base 1s had at the rear of the anvil.

At the front of vthe anvil the oblique portionv 21 terminates in two sections, one a tongue 30 extending vertically through the slot 22 in base 20, but of insuiicient depth to reach to the horizontal lower edge of the base. The other section 3| terminates in an edge 32 resting in the grooves 2| heretofore described.

When so seated, the anvil, according to the registry of edge 32 With selected transverse groove 2l, a particular die section 25 of the anvil 24 is in alignment with the before mentioned staple driver.

At the end of each of the

tongues

28 and 30 isa

lateral extension

33 and 34, respectively. The

extensions

33 and 34 are in alignment. Th'erebe- -tween is a spring 35 having at its rear end sharpcept for a very slight distance, i. e., suiicient to permit of slight play incident to the movement of the anvil longitudinally of the base.

At the front end of said spring 35 is a section 37 which is adapted to project across the extension 34, the form of the section 39 being such that it may be moved slightly relative to said slot 84 but such that it cannot be readily displaced from said slot.

intermediate the two

tongues

28 and 30, the spring 35 -is deformed-to provide a bearing section 38 adapted to rest upon the under part of the base 20 while exerting tension at the ends ofthe anvil 24 to maintain said anvil tightly upon the base 20 but not so tightly as to prevent movement of the anvil along the base whenit is desired to change the registry of the different staple deforming portions of the anvil upon the plunger. The spring 35 in plan view issomewhat of a squatty H shape having central slots at each of its shorter edges. ,f

.At each side of the anvil may be lateral extensions 58 which provide nger pieces 59 wherebythe anvil may be readily lifted against the resistance of the spring 35 and which extensions facilitate longitudinal movement of the anvil upon base 20to the one of the several positions which may be selected therefor. The anvil ends or tongues 30! and 302 projecting through the base 300 (see Figure l'l) may be threaded and a washer 303 and nut 304 may be used on each tongue to lock the anvil 305 rigidly. The anvil 305 may be adjusted by partly loosening the nuts 304, moving its position and tightening the nuts.

the anvil may clinch-the staple (see Figure 15a) may cause one end to be clinched and the other projected outwardly (Figure 15b), or may cause both ends to be spread rather than clinched (Figure 15e). One of the forming members in the anvil has a slot cut in the metal as shown. There is an angle on eachfr end of the slot. Such angles and the slot prevent the staple legs from becoming curved or bent and produce a straight or flat stitch. Such an arrangement eliminates the mechanisms underneath deforming members generally found in other like machines.

At the rear of the base 20 is a U-sha'ped member 40 which provides a bearing for a staple discharging arm. Such U-shaped member 40 has a base portion (see Figures 13 and 14),. extensions 4i therebeneath adapted to project through the material of the base 20 whereby the U- shaped member 40 may be secured upon the base by riveting or by spot welding or by other means, and wings 42 adapted to be turned vertically upward from said base iii. The vertical wings have a portion cut out of the center to provide discharging arm bearings at either end. The

base 20, in addition to having transverse slots 43`to receive the under extensions 4| of said U- shaped member 40 also has a longitudinal slot 44 in registry with a similar slot 45 in the base Upon a vertical shank 41 having two cross endv members one (48) of greater extent than the F abbasso other (lt) and resembling the letter T is a coil spring bil. Beneath the upper T-shaped member is a washer or stop i which has a transverse slot 52. The spring 5@ engages the under side of the washer bl to force the washer into close engagement with the transverse top member dit.

At the other end of the spring 5@ is a washer 5t having aligned depressions 5t adapted to register in one of the pairs of transverse grooves it at the edges of the slot t5 'in the base o the U-shaped member dit. The action of the coil spring 5@ is to urge the washer 533 away from the member 5i and in so doing the spring t@ forces the 'i-shaped member tl upwardly as far as the material or the base 2@ will permit, the movement, ofcourse, being arrested at the upper side. of the lower cross member dit.

A number of positions are provided for the tensioning device. The top oi the broader 'i'- shaped member @il is above the level oi' the axis about which the staple carrying arm revolves. Therefore, the proximity ofthe 'tensioning de vice .to the axis oi the staple driving arm de-I termines the height to which the staple carry ing arm will be lifted when not in' use.

Another :form of tensioning device is shown in Figures il and l2. 'in such a form, there is provided a yguide member, dt, with a base, and with wings 62. t@ having a lower threaded shank, .an arcuate top piece Gi, and a spring (i2. No washers are required above the KLJ-shaped member fit. me threaded shank of vthe member til extends through the two slots'lb and @it and beneath the top section of the base tu. Upon the threaded shanir is a loch washer td and a nut tti.

in this form of the device not only may the angular portion of the tensioning device be adn justed by movement longitudinally of the slot, but said device may be further adjusted by the tightening of the nut upon the shank. The washer tft is a loci: washer to prevent an adjust= ment once obtained from being disturbed. A section (tua) o the shank of member t@ is square to prevent turning oi the member @it in the slot, a part oi the remainder being circular and another part threaded as described. The T head oi the member t@ is designated tt.

The staple carrying arm comprises a ill-shaped iinternal member liti upon which staples are adapted to ride. Said member beneath the lower end of the staples is shouldered at ll and outwardly expanded. Over the staple carrying member l@ are two complemental lL-shaped members l2 which are secured to the U-shaped member l@ .at `its flaring sides beneath shoulder it, the short leg lli of the l. extending partly lover the top of the staple carrying member llii to provide a housing for the staples and a track for a staple following block intermediate said U-shaped member lil and said two i.shaped members l2. The L-shaped members l2 and the Ufshaped member it are joined together by rivets or pins lil or in any other suitable way,

there being a spacer ldd, onlthe shank ofthe pin or rivet. At the front of and extending through a U-shaped housing member are other pins or rivets.

The outer l.shaped members 'l2 adjacent their rear end have vertical keyhole slots it opening from beneath. The U-shaped member l@ has complementa] slots lll therein the width of the slots/ll coincidingwith the widest section of the keyhole slots 'it but otherwise ,being iLI-shaped and of slightly more vertical extent than slots There is a 'it-shaped member llt in the L-shaped member l2. Through the U- shaped member d@ upon the base 2li is a/bearing 'it for the staple carrying arm.

For mounting said bearings it, aligned apertures are arranged inthe wings tit of said U- shaped member tu. ".llhe aperture it on one side is larger thanthe aperture d@ upon the other side. The bearing lt comprises a member having .a head tl of the diameter of. the largeraperture i9; said head being bounded by -a reduced portion t2 of the depth of the wall of the U-shaped member l@ and an l shaped member l2, a central the same diameter as the head di, v

portion d3 of a second reduced portion bd of the diameter oi the aperture tu in the wing i2 and also of the ldiameter as the said other reduced portion t2 and of the width equal to the depth of the material of said U-shaped member l@ and an L-shaped member l2. v

Upon the opposite end of said bearing member is an enlargedhead tti which is hollow as shown at t@ and within which is disposed a plunger itl..

Said plunger till may be hollow orsolid, as preferred. lit is urged out oi said head tti by a coil spring t@ disposed in said head dit so that at all times the bearing member ld is forced in the olirection of the arrow in Figure 3. The diameter of the body t3 of said bearing member lt'and oi said head di is such that they will occupy the upper or enlarged portion of the keyhole slot it in the i.shaped members it, the lower narrower portion of such slotllfi being less than the diameter of the body t@ and head di oi said bearing member it so that ii the head tl and body b3 are inserted through the keyhole slot llt they liti will prevent displacement from the bearing member and the horizontal base of the staple carrying arm.

For ready detachment and attachment, the bearing member 'ld is movable transversely of the base 2@ through said U-shaped member dit' until the reduced portions d2 and @d of said bearing member it, are adapted to register with the material of the itl-shaped member 'iii and of the L-shaped members l2, in which position the staple carrying arm may readily be attached or detached for the narrower portion of the keyhole slots 'it is slightly greater than the diameter of the reduced portion t2 and itt.

In assembly the device, after registering the slots il@ and lll with the reduced sections d2 and.

iid of the bearing liti, the bearing member l@ is allowed to move,` on the urge of its spring tt, until the head ti and body t3 project through the enlarged sections oi the keyhole slots it in which position a firm joinder between the base 2@ and staple carrying arm is hadQthe sides l2 of the U-shaped member dit being of sumcient longitudinal extent to prevent more than slight lateral movement oi ythe staple carrying arm relA ative to the horizontal base. By a simple arrangement, the` keyhole slots may be disposed in the members l2y and the U-shaped slots in the member lil. requires a slightlydifferent structure for the transverse pin. The operation of the means, however, remains the same.

At the front end of the staple carrying arm is a staple driving housing. Said housing comprises a lower part t@ which is U-shaped in configuration, there being wings iii thereon which extend back -over the L-shaped. track members l2.

Through said L-shaped extensions 9i the transverse rivets or bolts 92 are disposed for maintaining the U-shaped member 90, the two L-shaped members l2 and the U-shaped track member l0 in assembled relation.

From the U-shaped housing 00, there isan upward extension b3 and extending therefrom forwardly are two extensions 94 of material which are inwardly turned and which are offset from thel riphery of the U-shaped housing member 00.

Higher upon the housing member 90, two ears 08 project rearwardly of the upper extension 03.

The plunger comprising a T-shaped mem-.- ber |0| which is secured substantially diametri.- cally of a mushroom tcp S02. The lower section |03 of said member is cut away to reduce its thickness, the reduced part being adaptedto project slightly below the ears e4 at the front of the U-shaped housing 90 and to bear against the solid wall at the front of said U-shaped member 90.' Secured to said member i0| in spaced relation thereto is a guide member i04 which has a central depressed section 305 which is adapted to ride between the parallel vertical edges of the ears 94 and be guided thereby.v

Said guide member |065 is adapted to be attached to said centrally affixed member Aby a screw |06 or in any other suitable way. The lower end of said guide member |04 has inwardly turned lips i0'l which lips 301 are in alignment at their vertical edges with the inner wall of the material forming the center section of said guide part, thus forming stops adapted to impinge the under side of wings 04- when the plunger |00 is at its topmost position, the wingsV 94 `providing' guides for the plunger |00 as well as stop members both for the upward and downward movement of the plunger, for the under surface of the .cross part |08 of said member |0| engages the top of the wings 94 to provide an absolute limit to downward movement of the plunger E00.

Upon the back wall of said member i 0| is a staple driver l |0 which is normally a flat piece of material of the character of a clock spring. -When the plunger E00 is in the uppermost position, the lower end of said driver H0 is below the level of the top wall of the U-shaped housing 90 and just above the foremost staple in the staple carrying track heretofore described. Rivets are used to maintain said driver in position.

In the present device, the staple driver plunger 00, instead of being surrounded on its sides for guidance, is provided with laterally opposed tracks in which guide members are adapted to be positioned to insure movement of the staple driving mechanism perpendicularly to the staple carrying arm. A much simplified construction and one possessing great advantage in cheapness of construction is thus obtained.

larly back of the upper 4extensions or ears 94 thereof is a cover member ||2 for the rear of the housing 90 whichmember ||2 comprises a transtherese Back of the U-shaped housing 90 and particu- En addition, two opposed vertical slots H6 and i ill are arranged to provide a track or guide for a coil spring iid. ln the solid material intermediate said slots i i6 and l lll is a narrow rectangular slot lle adapted to receive the end of the spring il i8 which is guided by the two adjacent slots HS and ill! which extend to the transverse edges of the material. y

e under portion E of the main body of said .s obliquely bent inward and at each side are shoulders S29 'terminating in projections i22, the shoulders and projections forming an interlock with the slots 0G and fingers @l in the U-shaped housing 90 so that the material of the cover projects in the slots 93 in the housing 00 with the projections 22 upon the cover projecting between the inner walls of the side portions glfof the U-shaped housing 00.

As will be noted, the slots HS, i il and it!) for vthe spring which are parallel and in alignment are oi-set from the center of the cover. Im-

mediately adjacent the under slot i il, there is an extension |23 of the material of the cover member. Said extension 523 is adapted to be bent inwardly and then vertically upward parallel to the vertical section of the main body of the cover. It is furcated at its inner end |24 and forms an additional guide member and an anchor for one end of a coil spring |25 adapted to force the plunger |00 into its uppermost position.

The ears H4 in cover i i2 which are adapted to be bent normally to the main body of said cover to fit over the exterior of the housing extensions 03 to be secured by rivets or screws, are the only fastening members required to maintain the cover M2 on housing 90 in view of the interlock of slots and ears heretofore described. The cover maintains the upper side of the U-shaped housing in accurate spaced apart relation.

Upon the plunger 300, there is a spring guide member |26, which has a solid body at that portion thereof which is secured to the handle |02, the lower end being bifurcated at |21 to permit of the spring guide member 924 on the housing closure memberv ||2 being inserted therebetween. The coil spring |25 which is anchored at its lower end against the bottom of the vertical extension 624 of the housing closure member H2 is adapted to surround the bifurcated member iN with its upper end beneath the plunger handle i02 so that at all times there is an urge upon the plunger |00 to retract it from any position to which it may be manually moved in the course of its manipulation. v rihe type of the guide member forming a part of the closure is adapted at all times to be within the bifurcations of the spring guide members, such bifurcations having inclined surfaces at their contiguous extremities to facilitate assembly and smooth operation.

To facilitate the joinder `between the mushroom top 02 of the plunger and the parts heretofore described, a single unitary member |30 4may be employed. This comprises a relatively wide body |3| having at one end a downwardly turned lip 832 which downwardly turned lipis adapted to extend over the vertical guide member |04 heretofore described. Centrally said main body has a pair of aligned rectangular slots- |33 to receive the end of the main` plunger member |0l which end has extensions |34 adapted to extend through said slots.

At its other side, as already indicated, the mate- 'rial of said member is in the form of the bifurcated verticalI member |21 articulated away from the main body |26 to reciprocate within the conrsaid two members forming a continuous. telescoping means keeping the spring-i125 from buckling at its middle.

Beneath the U- shaped staple carrying arm if@ is a staple holder preventing the accidental displacement or the shaking out of a staple as it is discharged from the arm it. Said arm it also supports the body of the' staple from buckling or bending while the staple is being driven into material on the anvil. Said holder comprises a trigger it@ terminating in a relatively wide blunt point Mil, and having an angular body ML2 adjacent thereto, a camming section M3 adjacent to said body section, and an elongated section Wi extending toward the rear of the machine, there being in such elongated body portion Mld' a cutaway section Miti which provides a spring hook M56.

The rear end of section ldd at itil extends under the second of cross members @2. Depending upon the under side of then-shaped member i@ is another springhoolc Mid and between said spring hook le@ and that in the staple holder it@ is a coil spring M59.

The position of the spring its, is such, and. is

made so by the two hooks just mentioned, that it is not truly vertical. In addition to exerting a l vertical pull upon the staple holder Miti from about the rear transverse member e2 in the housing gli, said spring Mil also maintains a constant forward urge upon the trigger. The staple holder is secured within the member l@ only by said coil spring Mit which urges it forwardly and upwardly as indicated, the rear end itl! of the staple holder it@ being adapted to slidingly engage and rotate upon a roller bearing surface in the form of a spacing sleeve i5@ about said rear housing transverse member 92. The 7:forward transverse member 92 about which is also disposed a similar sleeve it@ is adapted to provide a rolling cam whereby the staple holder litt may be moved rearwardly as and when said staple holder is moved downwardly with a staple driven by the driver il@ until the camming surface of the holder engages the sleeve H50 'surrounding nthe front transverse member. Downward movement of the staple holder is had whenever the staple driver il@ forces a staple which is resting upon the. staple holder tongue itl, downwardly.

Such movement is against the urge of the staple holder spring M9. During the downward movement of the staple holder, the tongue is urged forwardly against the front wall of the housing t@ by the coil spring Het. Just before the staple is discharged, the camming surface of the staple holder engages the forward sleeve Hell of the spacer member @2 and is by the further movement of the staple driver, because of the camming action indicated, moved out of the path of the staple and staple driver whereupon said holder it@ snaps vupwardly under the urge of spring M9, the tongue Mtl resting against the staple driver il@ where it continues to rest until the staple driver is retracted above the level vof tongue Mil at which instance the coil spring M9 forces the staple holder le@ forwardly against the front'wall of the housing '9b.' Each of the transverse members 92 in the staple driving arm includes a pin having a threaded shank at each end or a rivet. A sleeve E50 is arranged about the body yportion thereof, said sleeve l5@ providing a spacer element in relation to the U-shaped member lil.

The staple supports shown in Figures i and 8 are. the same save that the tongue itl there-x of in Figure s is at a lower level than the tongue` Mill shown in Figure 8. Such lower position of the tongue Mii causes the support to engage the Y staple later in its downward course from the machine but does not reduce the eectiveness of the support for the purposes described.

lThe Vspring lid which is threaded into the middle slot il@ in the housing closure il@ and coiledis guided by the slots il it and lill! in said 'staple housing cover i l2 and extends rearwardly to a staplel follower block. Said staple follower block comprises an inverted iii-shaped member it@ which is adapted to ride upon the trackv formed by the lJ-shaped member 'dil and the two L-shaped members l2. in one forni.A of the bloeit, there is a spring anchor iti secured tothe follower member til! in the following manner.

Such anchor comprises an extension Midi-rom.r the member Het iattached to the follower blocir it@ and has a section bent upwardly and then forwardly, the forward extension having at its front end a rectangular transversely arranged slot itt through which the spring' iid or spring fastening means may be inserted. Such anchoring means dei may include a body adapted to be riveted to said follower block Heiland there uur# be wings lieti at the side thereof fr hich are adapted to be turned upwardly to provide parallel nger pieces between which the spring an- Mii chor extension it@ may be readily disposed. vThe i 1 placing of the rectangular slot litt as far forwardly as possible reduces the tendency of the spring liti which is disposed atene side of the housing closure to twist the follower block and facilitates movement of said follower block in'an even manner the full length/of the staple track.

'lhe'spring lid, when desired, may be foldeoiv upon itself to provide a reinforced end, the folded baci; section il@ being adapted to be secured to dou thickness o f spring therebeneath as is i in the Figure 4, the rivet lllll extending through four thicknesses of the spring il it and thus providing sumcient strength and possessing suiiicient bearing surface to prevent ready bucltling of the spring. Such an arrangement does y away with the necessity of providing a spring shoe or similar reinforcing part for the spring lid.

In the present form of invention, it is a simple expedient to provide 'a full stroke-nfiechanisn'i.4

Figures 2 and 3, the intermediate its For example, as shown in guide member iti may have length a rearwardly extending right angle ex- At its bottom, said pawl has a weight lllll. .at

each'sidepf said weight Gill! in the side et is a stop, that limiting the clockwise movementfof .the I pawl being ina form of a stud llt in the housing` 93 and that stopping the counterclockwise movement thereof being in theform of an ear ille projecting from the body of the housing closure4 H2. i f u The teeth lid in said guide member extension H3 are of a limited vertical extent. Normally the plunger itil is at its uppermost position. in such position' the pawl H5 is beneath the toothed extension. As 'the plunger lil. is moved downwardly, the pawl H5 is moved to an angular posithe point dit and the oavfl face itil. Toe or? the tion against the urge of the weight lll. In. such angular position, the plunger it@ may be forced. downwardly,l but instantly the moving force is released from. the plunger itil and the plunger attempts to move upwardly under the urge oi spring 25, the pavvl tooth. il@ engages in one oi the teeth il@ in the extension dit and prevents such movement.

When the plunger ll @il has reached its doivrimost position, the teeth llt! will have passed below :lit will have assumed its normal position wltnthe tooth il@ horizontally disposed. es the .plunger retracto upwardly, the teeth ils on extension i 'Jil :torce the patti l'itl in clockwise direction. The upward movement must be continued until the plunger iilll has reached its topmost position. .any interruption of suoli tipe, Ward movement will be resisted by the navvl tooth Sie engaging with the teeth itil or" the extension llt. is there is insumcient space for the teeth il@ `to pass the paivl lili, the plunger it@ can be saicl to jam the loavfl, such jamming preventing reversed motion once the plunger stroke has been started in either direction.

Much difculty is incertain forms of stan' pling devices due to clogging. @logging results from bent, deformed or defective staples. many devices, such clogging may be overcome only by taking the machine apart and removing the defective staple. The present device is intended to be an improvement over other devices in if a mutilated staple is caught therein. the device may be forced to cut the staple into parte sind. diem charge the parte from the apparatus.

To provide an inexpensive means for preventing the clogging of the present device tivo 'construen tions are employed. @ne o these is :illustrated Figures i and S.

in this form of the device, there is an internal or lower magazine member The usual .lc-shaped outer members igt employed. it the of the device. the shoiilm tiered section i9@ nas e. milled or farines?. sloping member beneath the edge oi the face l rms tv h. housing a staple track. The sie, g vvaii tace directs the leg or". a staple donc'iv/ardlgv into such tracl; leading to the object into which the staple is to be inserted. Such sloping wall is eiective to straighten slightly bent staples by straightening them in their course into the material on the anvil. The sloping tvall it@ terminates atits upper end in an edge tilt. To thel rear oi the edge Mill', there is Said slot i as the re preached, is enlarged. T ie shape of the Slot is to preventlamining of staple parte. is the lower section or the slot is reached, the slot also widens as shown by the dotted lines ico. Figure i.

when a deformed staple is discharged from the magazine onto the staple track. one or both of its deformed legs will extend over an edge it@ as the staple driver forces the staple tiotviiu Wardlv.` lf the staple leg does not project over the edge ist, it will be straightened out bv having its end forced downwardly .in the startle tract: be

cause oi the obliguitv oi the :lace

But ii one or both of the legs of the staple project over the edge ist. then the staple driver will press the staple against the :tace i931, the lower edge ist thereof breaking the staple into parts in the manner shown in villgtlre lil. The separated portion of the staple either will be `discharged down the track when the driver is re-V having shoulder a milled or otherwise formed. slot 695. ci the device is an accesso tract/ed or will fall from the device through the slot 995. The cross portion ofr the staple and the depending section of its leg or legs will be driven rom the machine by Way oi the staple track rldcling the device of deformed staples is shown F in Figures 9 and l0. In this form, an operaio-c replaces the slot of the just described form of t invention.

Figures 9 and 10, the internal magazine iorrning member is designated gill?. It has the usual shoulder itl. About the shoulder are dis posed the two side members which complete the magazine.

the shoulder section Rill, there is a rearwar-illy sloping face 293 which terminates in edges 2M and its. To the rear of the edge 25M, there is an opening Zil'u 'which nas'dov/riwardly dlverging walls 2&5' and 2t?. The bottom 2% oi the opening fllt preferable7 has an inwardly sloping viali to facilitate rapid discharge ci staple ends from the aperture.

The action of straightening and of breaking staples into partsin 'this form oi the device the saine as in the previously described form the invention. So also is the behaviour of deformed staples, save that the cut-oli end of the staple is discharged from the opening Eile rather than. rorn the milled slot itil.

What claim is new and desire to secure by Letters raten?. in these United States is:

l A stapling device comprising a base, a ned member opening upwardly therefrom, n said @shaped membery and a staple carn rying arvi in said Ushaped member and pivot oliv mounted on said pin, movement o the pin 'transversely oi said base while retained by sain releasing said arm.

2. The device described in claim l, and in which said. goin has spaced apart sections of different diameters, parts offselected diameters when registering with said arm providing means for freeing said arm.

3. The device described in claim l, and in which the said arm comprises a plurality of longitudinal members, one oi said members having a key-hole slot and the other a Unshaped slot in partial reg istry, said pin having sections ci different diarnen ters, the larger sections thereof being seated in the circular part of the key-hole slots to hold said arm on said base and moved out thereof to release said am: from said base.

fi. il. stapling device comprising a base having a slot arranged longitudinally thereof with notches at its edge, an arm pivoted to said base, and means for urging said arm away from said base, said urging means comprising a standard having a cross member under said arrn, a spring intermediate said cross member and said base, means beneath said base for limiting the movement oi said standard relative to said base, and means as sociated withI said standard and having teeth seatable in said notches in said base to mainan adjusted relation between said standard and said base.

'5. in a stealing device, a magazine formed oi a U--siia'ped member having guide members in combination with a housing, and a staple drivr ing plunger, the housing and said U-shaped member forming a track for thadischarg'e of staples, said U-shaned member'havingr formed inthe maand in which aoearieo terial thereof a shoulder with an upwardly and rearwardly sloping surface arranged at the front thereof, and a 'discharge channel formed in the sides oisaid U-shaped member to the rear of said upwardly sloping surface, the top of said shoulder being in a level beneath the path of travel oi staples in said magazine.

6. in a staple driving machine, a Unshaped magazine member having a shouldered part and an aperture therethrough, side members attached thereto, 'a housng at the front thereof, and. a staple driving member in said housing, said hous-s ing and'said U- shaped member providing a traclr :for the discharge oi staples, said U-shaped member at its iront end and in its shouidered part having an upwardly and rearwardly sloping face,

jthe plunger co-acting with said sloping 'ace'to cut bent or crooked staples into parts to be discharged through said aperture.

7. The combination in a stapling device having a magazine, a housing, and a staple driver, oi staple holding means, a spring intermediate said holder'and said magazine and urging said holder upwardly and toward said housing, beneath said magazine and transversely thereof a plurality o camming faces,- always providing an axis for the movement of said holder, and said otherface engaging said holder to move it from the path of a staple when a predeterminedJ angular position is attained.

d. .a staple driving device comprising .a U= shaped housing closed for a portion of its iront and havingl an open section, the materialo the housingk at said open section being odset from the closed section, and a plunger guided by the material of said closed iront and of said ofiset sections.

9. A housing sheet or material bent to form a narrow il, there being extensions; of material from the legs o said U-portion having edges parallel to but odset from the base or said icl-portion, and a plunger between said extensions and said closed Ibase portion. l

i0. A stapling device comprising a U-shaped housing having a base and extensions in parallel-- a Plunge?.

ism with the base and odset therefrom, between said base and said oiset parts, and a .guide secured to said plunger and extending exteriorly .o said extensions.

ll.. Astapling device as said plunger Iand said guide mem= ber havev lateral portions, one o said portions cooperating ,with said offsetY section ofthe heus ing to limit'movement of the plunger in one directior'i, and the other lateral portions cooperating therewith to limit movement of the plunger in the opposite direction. K

l2. In a stapling device, a housing having an opening for a plunger, a, plunger comprising a main member, a staple driver thereon, a guide member for said main member, a handle. and an assembling member for said main member and guide member, said assembly member being secured to said handle, extending about said guide member, and engaging said main member. o

i3. The stapling device described.A in claim i2,

and in which said staple driver at one lend engages said assembly member.

'14.l Thestapling device described in claim l2,

and in which said housing has a cover provided with a plunger spring guide,'said assembly member having an extension vforming a complemental guide for said spring.

i5. in a stapling device, a staple' magazine,y a

there being one of said faces for a staple driver comprising a' described in claim ith y housing at the end of said magazine, a. follower in said magazine, a plunger in said housing, a cover for said housing, and ,a spring for said follower threaded into and coiled about said cover. i6. En combination, a staple driving plunger, a housing therefor, a. magazine, a staple follower therein, a cover for said housing having a seat, a spring on said seat, said housing and said cover having interlocking and intertting sections, and a single opposed fastening means intermediate said cover and said housing.

i7. in a stapling device including a base and a staple carrying arm, means for detachably and pivotally securing said arm yto said base cornprising a mounting on said base and a bearing member providing a pivotal interconnection between' said arm and said mounting, there being means whereby limited transverse movement of said bearing member with respectl to said arm permits disengagement of said pivoted interconnection, and spring means for urging said bearing member into pivotal interconnection posi,-

tlon.

i8. ln a stapling device including a base and a stapling arm, 'means for detachably and pivotally securing said arm to said base comprising spaced vertical upright wings secured to said base, a bearing extending between said wings, said arm' being provided with an -aperture for receiving said bearing `whereby said bearing pivotally supports said arm between said wings, and interhtting means between said bearing and arm whereby longitudinal movement of said bearing 'while supported by both said wings permits disconnection o said arm from said bearing. x

19. In a stapiing device, a base, asmounting 'member' secured to said base, a staple driving member movably related to said base and a locking part for holding said membersin operative pivotal relationship, said part being movably carried by one of said members and in one position thereof in said member efective tolock said members in said operative relationship and in another position thereof in said member effective to permit said Vmembers to be disengaged from operative relationship, there being v'spring means to urge said part into one o said positions.

20. ln combination ing arm member and a mounting member therefor, a bearing part carried. by one of said members, said part in one position thereof being effective to lock said members in operative pivotal relationship, a slot in the other of I said members, said part in another position thereof being cooperable with said slot. to release said members fro operative relationship, said part being relatively movable with respect to both of said members to either of said positions.

2l.. En a stapling device, a staple driving arm memberand a-support rmember for said arm, apertures in said members, a bar movably carried J in said apertures and locking said members in operative pivotal relationship, a slot in one of ,said members, said position within said apertures being cooperable witha movable. staple driv- 1 bar when moved into another engaged strom'operativegrelationship.

` 222.v in a stapling device, a base, an' arm' piv otally mounted-to said base, and means mounted upon saidbase to maintain said arm in spaced relation tosaid base, said means being'shiftable along said base to ce the spaced relation be# tween said arm and said base.

23. In a stapling device, a base, Ya staple driving arm 'pivoted to said e. andameans resil domes@ being siidable along seid guide member to eid in guiding the movement thereof, and comming means coasting on seid supporter when seid porl tion hes reached e. predetermined position in said chute to overcome the forward urge of seid spring meens thereon.

d0. in en implement of the type indicated, tine combination of e, staple driver, e staple supporter projecting beneetin tine driver to support e steple being driven thereby, means for mounting the staple supporter to edgpt it to slide bodily with its orwerd end swinging downwardly during the descent of the driver, and means to accelerate tbe sliding movement of the supporter to canse its end to be withdrawn from the staple es the driver reaches the end of its descent.

di. In en implement of the type indicated, tine combination of e staple driver,V a, staple supporter projecting beneath the driver to support n staple being driven thereby, said supportenhevin'g an inclined lip et its end for engagement beneath the heed oi the staple, and means for mounting seidt supporter for sliding mid swinging movement whereby seid supporter slides bodily as swings downwardly with the driver to maintain seid lip in non-slideole eonteet "with the heed of the staple until it has been nertittlly driven.,

Wilhelm Gf. PANKQNW,