US2033049A

US2033049A - Stapling device

Info

Publication number: US2033049A
Application number: US585710A
Authority: US
Inventors: William G Pankonin
Original assignee: ACE FASTENER CORP
Current assignee: ACE FASTENER CORP
Priority date: 1932-01-09
Filing date: 1932-01-09
Publication date: 1936-03-03
Anticipated expiration: 1953-03-03

Description

W. G. PANKONIN STAPLING DEVICE March 3, 1936.

2 Sheets-Sheet l kwh. mh. Sm

mm. nq a ill ,m

NS MN QN m m3 mi .NS

mm @fm/@fam @afg Filed Jan. 9, 1952 2 2 Sheets-Shet 2 W. G. PANKONIN STAPLING DEVICE Filed Jan. 9, 193

March 3, 1936.

M QS Q AI @EN MS,

Patented Mar. 3, V15936 PATENT lvorrlcle;

srAPuNG DEVICE William G. Pankonin, Chicago, lll., assignor Ace Fastener Corporation, Chicago, Ill., a corfporation of Illinois Application January 9, 1932, Serial No. 585,710 I.

58 Claims.

The present invention relates to a stapling device. Its objects particularly rela-te to improvements in means for securing a staple driving mechanism to a. base; to an extension for a staple driving arm; to means for connecting a staple driving device or an extension thereon to a base; to an improved stop for a spring spool or end; to an improved means for attaching an actuating spring to a stapler follower; to an improved handle for a follower block; to a new and unique means for holding a follower spring in a staple ejector housing; to a new and improved anvil for a stapling device; to means for preventing the buckling of a staple during its insertion into material; mechanism; to means for preventing staples from being accidently ejected from a stapling device; to a new improved means for forming the end of a staple follower spring; and -to a generally improved staple driving device.

The objects of the invention also include a new and improved means for limiting and dening vthe movement of a staple driving arm relative to its supporting base.

These objects, and such other objects as may hereinafter appear are obtained by a. novel construction, unique arrangement, and improvedA combination of the several elements forming the embodiments of the invention illustrated in the accompanying two sheets of drawings, hereby made a part of this specification, and in which the numerous improvements mentioned herein.- above are illustrated.

In the drawings referred toz- Figurel is a plan view of a complete stapllng device made in accord with the invention;

Figure 2 is a side elevation of the device illustrated in Figure 1;

Figure 3 is a horizontal section on the line 3-3 of Figure 2; s

Figures 4, 5 and 6 are a vertical section, a bottom View, and a horizontal section of one form of a staple driving head. Figures 5 and 6 being taken on the lines 5-5 and 6 6, respectively, of Figure 4;

` Figure 6a is a'vertical transverse section on the line 6a of Figure 4;

Figures 7, 8 and 9 are a vertical section, a bottom view, and a horizontal section of a second form of head, the' Figures 8 and 9 being taken on the lines 8-9 and 9 9,A respectively,

of Figure '7;

Figure 10 is a horizontal section through a stapling head illustrating' one form of tensionto staple deforming ing device for a' staple follower spring and the manner of attaching the latter; j

Figure 11 is a fragmentary side elevation vof a stapler head possessing the tensioning device illustrated in Figur'e 10;

Figures f 12, 13,.14'.and 15, respectively, are a transverse horizontal section, and three verti. cal sections of 'a second tensioning device, FiguresA 13 and .14 being on the lines. I3--l3 -and lll-TM of Figure 12, and'Flgure 15 being averticaltransverse section;

Figures. 16' and 17, respectively. are a trans` verse horizontal section andaI side elevation of a third form of tensioningdevice; L l

Figure 18is.a group of 4staples,'A toG. as deformed in-.thevarious .types of. stapling devices herein described' and illustrated;

Figure 1 9 is an enlarged sectional detail of the rear end .of the base extensions, and -connecting members therebetween; t.. 4-

Figure 20 is an, enlarged section 2li-20 of Figure 3 showing a staple in clinched position; and rv Figure 21 is a fragmentary side elevation o1'-l reduced size of the head of the device.

l, 2l on the line Like reference characters areused to desigfeet may be secured, these generally having a protective bottom to engage furniture. The enlarged portion 2l of the base 20 may reach to a lower horizontal plane than the body 23 of the base. Said enlarged section is used to mount theparts employed for limiting the movement of the staple carrying and driving arm.`

Also, at the rear end 2| of the base 20, is an L shaped lug 24 integral with or secured to the base 20 in a suitable manner. The lug 2l is parallel to the base 20 and the leg 25 thereof projects toward the front of the device.

At the front of the base 20, the material of the base is narrowed and forms a platform 2B in which an anvil is supported. At the sides of the platform section 26 are ears 21 in which are apertures 28 to receive feet. Thefeet may have covered bottoms to prevent the base 20 from marring furniture or other surfaces on which the device may be used as shown. v

Pivoted in the side walls of the platform 26 at the front of the machine is a barrel like anvil 29 which is mounted for selective rotation. The anvil 29 illustrated has four

seats

30, 3|, 32 and 33 to receive staple legs, each of the seats causing a staple leg to be bent or deformed. All four seats may be different one from the other. When desired two or more of the seats may be identical, or all may be of the same type. The selection of seats is a matter of choice.

Attached to the platform section 26 is an anvil locking lever 35 which has a heel section 36 held in position by a machine screw 31 or the like, a main body 38 having a detent 39 thereon, and an extension formed into a.- nger piece 40. A spring 4| (leaf or wire) is associated with the lever 35 to urge it clockwise about screw 31 so `that the detent 39 engages in one of four slots 42 provided therefor vin anvil 29 to hold the anvil 29 in a selected position whereby a selected seat (30, 3|, 32 or 33) is in operable position in respect to a staple driving plunger shortly to `be described. There are as many slots 42 as there are usable seats (30, 3|, 32 and 33) and each slot 42 is disposed to register with the detent 39 to maintain the selected seat in alignment with the staple plunger. l i

At one end of the anvil 29, there is an index 43,

1 so that by number or by other insignia, a particular seat is indicated to be in registry with such staple plunger. To permit of a change in the position of the anvil 29, the finger piece 40 is depressed with one hand or a finger. With the other hand or another fingerl or ngers, the anvil 29 is rotated by a knurled head 44projecting to the side of the platform 26. Such handle may be an integral part of the anvil structure.

'I'he anvil locking member 35 may be at the side of theplatform 26 as illustrated. It could be internally disposed of base 20. The lever 35 may have thereon a lug projecting laterally. Under the lug, the leaf spring 4| may extend about the machine screw 31 on which the locking lever 35 is pivoted and be anchored in the plat'- form 26 adjacent the rear thereof. A seat may be arranged in the vertical shoulder intermediate platform 26`and body 23. Any suitable fastening means may be employed between spring 4| and its associated parts. When desired usually,

and as shown, it is positively held.

said anvil is seated in an aperture 52 provided therefor in the side wall of the platform 26.

On the side wallv of platform 426 is a plate 53 having a slot 54. The plate 53 is secured to the side wall of the platform 26 with the opening in the slot 54 upwardly or downwardly disposed,

as preferred, so that a reduced section part 5| at the end of anvil 29 will be partially surrounded. A screw or rivet 55 may be inserted into the reduced part 5I, the head thereof engaging the' plate 53 at the side of the slot 54 to prevent longitudinal movement. Screw 55 may be replaced byl an integral head which is the preferred structure. Plate 53 may be attached to the platform 26 in any suitable manner to firmly secure it in position, as for example screws 56. The head 55 prevents axial displacement of the anvil 29 rela.-

tive to the platform 26 by reason of the engagement of the head 55 with plate 53, while providing ready assembly of the parts.

Several forms'` of .anvil dies are shown. That in the same fashion as the end of a staple in anvil die 33. By the employment of an undercut seat as is shown in Figure 3, the other .end of the staple is bent or formed into a hook like sectionwhereby it may be readily manipulated with the fingers. The staple, as it is bent outwardly, has its end away from the undercut seat impinge against a square detent shoulder 33a which ara rests the end of Wire while the other end is forced around a semi-circle groove 33h with an undercut-portion preventing the wire from jumping up. The seat is so designed for easy removal when material has been shaped as shown in Figures 18B and C. Thus, an elongated staple is formed which may be withdrawn from a stack of papers by a straight pull, the staple-,behaving in the fashion of a pin. The anvil just described is not designed for use with stap/le engaging means such as are illustrated in Figures 4 to 9, inclusive, but is appropriate for use when the staple path is free from friction increasing parts contacting the bridge of the staple. Y

Die 32 in anvil 21 bends both ends of the staple outwardly as is shown in Figure 18D.

. The staple carrying member includes a solid member 51 having its end 51a milled into a U- shape forwardly and under the plunger housing. About the member 51 is a U-shaped member 58 which also extends into the plunger housing. The members 51 and 58 form a track which guides staples under a staple driving plunger, the staples 34 being of a type individually formed and adhesively secured in an elongated U-shaped strip. A

In the upper member 58 is a longitudinal slot 59 to allow the passage of a staple follower. The members 51 l and 58-are joined one to another by suitable machine screws or by rivets, as preferred, the drawings illustrating pins l6|) with threaded ends.

The material of the members 51 and 58 may have shoulders therein orbe formed to effect the track for the staples 34 while providing a lower section through which the' pins 60 pass without interfering with the movement, of the staples. Spacer sleeves 60a may be disposed on the Shanks of the pins 60 at the milled out section 51a.

At the rear of the members 51 'and 58 are parallel extension members 6|. Intermediate members 6| are a plurality of pins 62, these being suitably spaced. By these pins the extension members 6| may be rendered true. In Figures l and 2, two of said machine screws 62 pass through the members 6|, 51 and 58, and two are disposed adjacent the rear of the extensions 6|. Inter- -mediate the two pairs of machine screws 62 just mentioned, the extension members 6| are pivoted to extension 25 of the lug 24 by a bearing pin 63.

The position of the pins 62 and 63 in,rela.tionto the parts 51 and 58 is such that no interference is had with the ready loading of staples 34 into base 28 projecting through the aperture 65 which does not. fit tightly thereabout.

Within the open section of the U-shaped housing64 is a sleeve 68 with turned in end 69, which end ilts closely about the post 61. Within the sleeve 68 and engaging the turned in ends 69.

is a spiral spring 10, the upper end of which is adapted to be seated beneath the head of a screw member 1| which is secured to the post 61. In this manner,.the tension of the extension arms 6| -about their pivot 63 is regulated because movement of the head 1I rotatively determines the spring pressure on the said extensions.

The upper internal face of the sleeve 68 which is longitudinally split is threaded to receive a nut or cap 12 and to iirmly hold said cap inadjusted position. The position of'the base of nut 12 determines the limit of the upward movement`of the extensions and the adjustment of the head 1I determines the rebound thereof. Because the sleeve 68 is loose about the post 61, the cap 12-provides an eective stop for the angular movement -of the` extensions. Usually the adjustments of the spring 10 are made at the factory'but the adjustments of cap 12 may be made in the hands of the user to allow the head of the device being set as low as thethickness of the material to be Istapled will permit.

Plunger guiding rollers 18a, 10b and 18e are disposed on pins in the housing and are arranged' to provide guides 'for the rear face of the plunger. The rollers or collars may be on such pins to facilitate ready manipulation of the plunger.

The plunger 12a may be square in cross section and the plunger may have means to prevent a partial driving stroke. The staple driver may be arranged to deform a staple head in one of the two manners shown in the drawings.

The plunger 12a is spring actuated on its upward stroke and has a driver 8| secured thereto in any suitable manner. Any desired arrangement of stops to limit the uppermost and lowermost position of the plunger or driver may be had.

There may be disposed upon the staple carrier, a housing member 14. The plunger 12a may be formed by articulating a sheet of material with the contiguous edges thereof broughttogether upon any side as, for example, .upon the rear as illustrated. Upon the top of the plunger 12a, the handle 13 may be secured in any desired fashion as by a process of riveting or of spot welding orotherwise. The staple driving member 8| comprises a relatively thin sheet of hard material suitably secured to the plunger 72a.

A cover -15 employed to close the open back of the U-shaped housing 14 has ears 16 which engage against the outer wall of said housing'to-be secured tightly thereagainst. Screws 18 extend through the ears into the` U-shaped housing member 14. A spring 18a. may extend about a standard 19 and is used for forcing theplunger 12a upwardly whereby the staple driver 8| normally is maintained in its upmost position.

Within the housing 14. is a die block 88 having a body in which a track in the form of a staple I the magazine or track formed by members 51 wide vertical groove is provided. Therer is'a U- shaped slot 88a in the die block 88 to receive the ends of members 51 and `58 which terminate in part upon the face vof the track portion and ush therewith.

The inner member 51 is undercut at its front end to provide an opening 51a cooperating with the die block opening 80a to provide an always open passageway in under side of the staple carrying arm for the discharge of mutilated or broken staples.

Because of the inverted U-shape of the aperture 80a. in the die block 80, there is an upwardly projecting tongue therein. In the vertical sections of slot 80a between theouter edges of the openingy and the tongue are angular shearing faces 80D against which a bent or deformed staple is driven bythe staple driving plunger 8| in the course of lthe downward movement of the l plunger 12a to' discharge a staple from the device.

The end of the outer magazine member 58 is secured in the die block 80 in such a manner that the lip of the member 58 at its top edge, is adapted to extend through the die block, the front-face of the member 58 being flush w ith the back face of the track therein. i

The inner member 51 of the magazine terminates in a U-shaped extension which is adapted to rest on the to'p of the tongue in die block 80 and extend wholly thereacross. At its back, the die block 88 has a shouldered section 80o to receive the ends 58D of the magazine mem,- ber 58 and to render more secure the assembly.

InFigures 4, 5 and 6 the staple vdriver 8| is shown with its lowermost end having three 'verf tical grooves 82, the grooves 82 being in parallelism. One of the,grooves 82 is at each edge of the driver 8| and the other-is at the center.

In the housing 14, there is provided by stamping or by other suitable means, three complemental ridges 83 which register with the grooves 82 in the driver so that the driver 8| may make a full stroke Without any partof it binding upon the housing 14. w

A staple discharged over the end of the U" shaped track member 51 is adapted to rest in the track in the die block 80 until the plunger 8| strikes it across its top to force it along the die block 88 by way of the track therein and into material beneath the head 13 and ori the anvil 29. The ends and bridge of a staple 34 are adapted to normally rest upon the top of the ridges 83 in the housing 14, there to be held against acci--4 dental displacement and in readiness for the driverto strike.

When the driver 8| is forced down by a manually delivered blow upon its handle 13, the driver 8| strikes the staple 34 across its flat top and 'forces its legs 84 and top 85 downw rdly between ridges to engage the staple is that the center ridge which tapers from the beginning or upper part to the bottom, the distance being closer at the bottom than the top, causesl a steady friction on the middle of the top of staple, the-friction increasing on the staple as it is being forced downwardly into the material. This friction holds thetop of the staple rmly against the bottom of the driver and keeps the middle of staple from buckling while going through material. The outer ridges are not tapered but are so spaced that they prevent the inside of the staple legs from bending inwardly or buckling while being driven into material. This makes it possible to drive the staple throughV harder materials or more material than otherwise would be possible.

In such an arrangement the staples 34 cannot be freed from the die block 80 accidentally, and no amount of shaking or manipulation of the device will dislodge a staple 34 in the die block 80 from its normal position therein. When desired, the track in the die block 80 may be provided with ridges and the driver 8| supplied with grooves (at the opposite side from that now shown) to produce the same effect as that which has just been described.

Another way to support a staple at its top to prevent buckling downwardly in its center is by having the center deformed as shown, the center ridge being straight or slightly tapered closer to die block at the bottom. The wire of the staple is bent sideways andthe temper in the wire is sufficient to keep the upper part or bridge of staple pressing upwardly against bottom of plunger blade to prevent it from bending or buckling while setting into material. The outer grooves or ridges are brought to the inside of the legs to keep the legs of the staple from buckling or bending inwardly. Another advantage in forming the upper or bridgeof staple as shown is to have it laymore flat and square after stapling the material. Oifsetting the wire sideways helps to maintain it at.

In Figures 7, 8, and 9, the die block 80 has a channel yor track which is irregular in horizontal cross section. The irregularities on the vertical face of the die block 80e, those on the front of the housing 14e and on the two faces of the driver 8|e are complementa] and corresponding. Means for preventing buckling of a staple 34 in its downward course with coincidental deformation is provided by such'irregularity in cross section. The housing 14e at the front may have ridges- 86 therein and the die block 80e at the rear may have a corresponding formation 81 so that the staple 34 as it is moved down in the track in the die block 80e is frictionally supported to the extent that it is bent across its top section intwo directions as is shown in the staple illustrated in Figure 18G. A staple with a laterally formed bridge similar to that illustrated in Figure 18G i Y ls disclosed and claimed in an application Serial No. 39,247, filed September 5, 1935, by William G. Pankonin, the applicant herein. The faces of the driver 8|e, the housing 14e and die block 80e are such that the driver 8|e in its downward ight, under manual urge, does not bind against the housing or die block but is free to move the full length of the die block track without material frlctional obstruction. 'I'he die block and housing shown in -Figures 7, 8 and 9 also prevent any accidental dislocation of a staple 34.

In the present form of the invention, the cover 15 for the housing 14 instead lof being secured in close proximity to the U shaped housing at the point where track members 51 and 58 pass thereinto has ears 9| which overlap onto the housing 14, there to be secured by screws or rivets. The lower end 92 of the cover 15 is away from the housing 14 to allow the passage of the staple follower which is positively stopped at the end of the slot in member 58. The sides of the cover adjacent such cut away position are at an angle to the rear edge of the housing 14 so that if the staple followerv spring is released, the spool or cross bar at the end thereof will impinge the angularly disposed sections of the cover 15 which act as a spring-like cushion to break the force of any blow which the spring might otherwise deliver against the housing 14 when the spool is released from the follower. In the center of the cover is a tongue 92a. which is bent to accommodate the follower spring so that when the spring Y is lifted upwardly it will be bent around the tongue 92a rather than at an abrupt and disrupting angle.

New means for securing a spool or cross bar to a spring is illustrated. At the end of a spring is an auxiliary leaf spring |0| which is dis- -posed on the top of the staple follower spring |00. The outer end |02 of the leaf spring I0| may be turned upwardly. f

In association therewith is a staple follower block. Such` lock has a body with wings, the wings extending upwardly and providing at the rear a face at an angle of forty-five degrees or less from the perpendicular. The seat thus formed is in substantially the same horizontal tensions for preventing lateral movement of the body from the seat provided therefor.

Beyond said collars or extensions, there may be provided enlarged sections-comprising flanges over which rubber or other elastic ring members may be supplied as shown. The ring member has a section which extends overthe ends of the body as is shown. An alternative form has a rubber web closing the ring at its outer end. Said rubber members provide cushions, facilitate nger gripping of the end of the body, and also tending to prevent bending or damaging of the housing or -the cover therefor should the spring be released under tension and the handle or spool strike the housing or the cover therefor.

The staple follower is designated |04. It has ears |05 with a shallow generally vertically disposed seat |06 therein. The seat |06 is to receive a spool or cross bar |01 having at its ends soft rubber finger seats or cushions such as are illustrated in Figures 1 and 2. One form of cushion isa ring 81, Figure 2, and the other a ring 88 with a web 09 across one side thereof, Figure 1.

The spring |00 is centrally disposed in respect to the cross bar |01 and is secured thereto by a U-shaped clip |09 which extends therearound, the cross bar |01 falling within the closed end of the U-shaped member |09. Between the legs |08 of the U-shaped member |09 is the end of spring |00 and the flat spring |0|, the staple follower spring |00 and the at spring |0| being secured to the U-shaped member |09 by one or more riyets passing through the U-shaped member, the leaf spring, and the staple follower spring. More than one leaf spring may be employed when desired. When a plurality of springs are used, the springs are staggered as to length, the top spring being shortest. Such an arrangement prevents any possibility of the staple follower spring |00 kinking and buckling and insures a .firm attachment of the staple follower `spring to the cross member, but without undue binding and with certainty of correct assembly of the parts in use. Such an arrangement also taining the tension upon the staple followerv spring, three different mechanical arrangements are shown. In. Figures and 11 one form of such spring tensioning apparatus is shown. A conjoint readingof the transverse section (Figure 10) and of the fragmentary elevation (Figure 11) should be had. In the U-shaped housing 14 at one side thereof is a relatively short slot 9 to receive one end of the spring shaft ||1 while at the other side of the U-shaped housing 14, there is a key-hole slot |20.

The shaft ||1 comprises a body having a reduced end section |2|. The reduced end section |2| is adapted to rest in the smaller and shorter slot I9. To maintain the staple follower spring shaft H1 against lateral displacement, there is placed upon the outer end of the reduced portion |2| of said shaft a head |22 which is of greater diameter than the width of theslot thus preventing transverse movement of the shaftthe shaft adjacent the reduced section being of a diameter vgreater than the width ofthe slot.'

The outer end of said shaft has an oblong head l| 23. The width of said oblong head is substantially the width of the narrow section of the keyhole slot so that when said shaft ||1 has been placed in an adjusted position, it will be held against rotation by the relatively close fit of the rectangular head |23 of theshaft I1 in the narrow and complemental portion of the key-hole slot |20.

The enlarged portion of the slot |20 is of a diameter slightly greater than the major transverse dimension of-the head |23 so that when. the shaft ||1 is moved to its extreme forward position in the machine, the shaft H1 may be rotated by a wrench or.by any other suitable tool in a clockwise direction to increase the tension upon the staple follower spring |00. When sufiicient tension has been obtained by the rotation of the shaft ||1 while its head is in the upper shaft in the slot whiledn use.

In Figure 10, a simplified means for attaching. the staple follower spring. |00 to the shaft ||1 is also illustrated.' The spring |00 at its wound end may be bifurcated as shown or provided with a greater number of tongues than shown. The tongues |25 are adapted to be threaded through circular transverse apertures |26 arranged in parallelism adjacent the longitudinal center of the spring shaft |`|J after which the spring shaft |1 may be rotated to maintain the spring |00 in position. Fastening members of suitable form may be supplied on spring |00 as desired but are not required.

'I'his method of attaching a spring allows a possible, thereby making that end strong and full width for winding purposes. In the manner described, a very wide spring may be attached securely to a comparatively small diameter shaft with but slightlytreducing the strength of the spring at its starting end.

At the same time, the spring is maintained in position upon the shaft ||1 so that 'as the shaft ||1 is rotated to increase the tension upon the spring, no undue angular strain is\,placed upon that part of the spring |00 which is in juxtaposition to the shaft 1. y'I'here can be no lateral movement of a spring' so held.

A second form of Aspring tensioning device is shown in Figures 12, 13, 14, and 15. In said form of tensioning device; the staple follower spring shaft |40 which is primarilya fiat piece of metal or the like has a central body portion |4| pro- Nvided with a slot |42 therein. The body of at material has opposed wings. |43. These are extensions and are 'bent over unntil substantially parallel. The metal of the member |40 may be cut away to provide reduced sections |44 to facilitate bending of the wings |43.l Adjacent said reduced sections |44, the shaft |40 is enlarged. the width of the enlarged sections |45 being greater than the average diameter of the slots in the housing 14 in'w'hichit rides. By the enlarged sections |45, the shaft |40 is normally held against lateral displacement, when the ends of the shaft |40 are disposed in the opposed walls oi housing 14. One end |46 of the `shaft |40 comprises a relatively narrow vrectangular portion projecting from the enlarged portion |45 and is adapted to turn freely in the slot |41. The slot |41 may be truly circular. when desired. It may be of the same configuration as the slot opposed to it now to bevdesoribed, or it may be elliptical,`

the preferred form.

At the opposite side of the housing 14, a second slot |48 is provided. Said slot is of a shield shape and it has teeth |49 complementally but oppoi sitely disposed. One section of said slot is substantially semi-circular, such half circle being broken substantially dametrically by the inward-.T45

ly projecting teeth 49. A line-,drawn through the body |4| when resting on Athe teeth |49 would be truly diametric.

The slot |48 has an enlarged section |50 having two extending portions |5| which are approximately one hundred twenty degrees apart. The ends |52 of the shaft |40 comprise a normally rectangularsection which has a length equal to the diameter of the half-circular vsection of theQ The shaft |40 is inserted through the slot |48 by employing the enlarged end |52 thereof. After a spring |00 is threaded through land about the shaft |40 as shown in Figure 14, there is no tend- 'ency for the shaft to' escape because the tension of the spring |00 wound around' the shaft in the manner shown in Figure 14 maintains a constant tension avoiding movement of the` shaft toward the front of the device.

Under the inuence of a winding tool 09, move- 05 ment of the shaft |40 to increase spring tension is in a clockwise direction. To accomplish this movement, one end of the head |52 at the .bottom of slot |40 is displaced away from the radial tooth |40. Such head section is advanced into the enlarged section |50 during which time the `upper head section is riding on the semi-circular .periphery of Ithe slot |48. When the shaft |40 has been rotated nearly one hundred eighty degrecs; the previous`ly-upperv head section of the thereover, the lower (now upper) head section is moved in the enlarged upper part of the slot' to allow the camming over of the other head section. When such' camming is completed, the further rotation of the shaft |40 forces the now lower head section into the enlarged lower section |5| of the slot while the now upper head section cams over the upper tooth |49.

With the upper head section behind the upper tooth |49, the lower head section recedes into engagement with -the lower tooth |49, the two teeth |49 preventing accidental counterclockwise movement of the shaft |40. Such counterclockwise rotation of the shaft |40 is prevented because the length of the head section |52 taken is. greater than the diameter of the slot |48 from one tooth |49 to a point approximately one hundred eighty degrees therefrom. The rotation of the shaft |40 in a clockwise direction, however, is relatively simple, once it is understood. The head |52 of the rectangular shaft |40 providesv cam faces operating about slot |148 and the teeth |49 in the slot |48, the periphery of the toothed slot forcing the winged sections into one or the other extensions |5| f the enlarged part |50 of the slot.

Reduction of the tension upon the spring |00 by a rotation of the shaft |40 in a counterclockwise direction, on the otherhand, is more dimcult, except under the guidance of a proper tool. Such reduction required selective manipulation of the parts to move the shaft and its wing sections away from the teeth |49 which normally prevent counterclockwise movement, the avoidance of the teeth being one at a time to procure a reverse rotation. The tension of the spring |00, even though very slight, is suillcient to snap the shaft |40 into position against the teeth |49 to prevent further counterclockwise movementat all times, except when a tool 89, as shown in Figures 13 and 15, is applied to the shaft |40 and the operator carefully guides the head |52 of the shaft |40 in the two extensions |5| and away from the teeth |49.

A third form of spring tensioning device is shown in Figures 16 and 17. In such third form of the invention, elongated openings |370 and `|35 are used in the U-shaped housing 14 now to be described. The opening |30 has teeth.|3| in its periphery at the lower and rear sides thereof. 'Ihe spring shaftl|32 comprises a main body through which parallel transverse circular slots |33 are formed to receive the bifurcated ends |25 of the spring |00. Like in the'iirst previously described ,I form of tensioning device, one end ofshaft |32 rides in an angularly disposed slot l|35 and is held in position therein by a head. The slot |35 is complemental to slot |30.

When spring tension of sufficient intensity has been had upon the lfollower spring |00, the shaft |32 is allowed to move forwardly in the slots described, the teeth |3| in the larger slot |30 being adapted to resist counterclockwise movement because of their engagement with the teeth |36 on head 34. The shape and position of the teeth |3| is such, however, that for clockwise revolution of shaft |32 whereby the spring tension is increased, rotative pressure on the shaft |32 will unseat the member |34, forcing it upwardly and forwardly in the slot |30 sufciently to permit of such rotation. The spring acts to hold the shaft firmly into position, The greater the tension on the spring the more firm the shaft is held in,

locked position.

This form of spring tensioning device admits of a ready rotation of the shaft |32 with a suitable tool to increase the tension of the spring, and a firm resistance against rotation in the opposite direction to reduce the tension of the spring |00 unless the shaft |30 is moved to its extreme forward extent of the two slots |30 and |35 in the U-shaped housing.

Flanges 14a may be used in the housing 14 (see Figure 10) to provide spring guides and to prevent displacement of the wound spring axially thereof. Such guiding flanges may be formed as and a strip of staples is placed in the magazine.

The staples are in the form of an elongated strip, which strip is obtained by gluing wire staples together.` The individual staples are readily separated one from another by forcing them apart, and in the machine, the end staple is`broken from the strip by the die block which is adapted to impinge the end staple only. 'I'he thickness of the staple track in the die block is such that but one staple from the magazine can project thereinto under the urge of the staple follower.-

.As a strip of staples has been placed in the magazine, the staple follower is replacedat the end of the strip, and then the staple follower spring is put in position to urge the follower along the magazine to force the staples, one at a time,

into the die block in the path of the staple driver.

The machine is now ready for use. Material is intermediate the driving head and the anvil. The staple driving head is forced downwardly thereon by a push or by a blow of the hand. The staple driver detaches ya staple from the strip and forces it against the anvil, penetrating any material that may be resting upon the anvil. The character of the deformation depends on the particular por. tion of the anvil which is in registry with the staple driver and the structure used for preventing the buckling of the staple, two of which are described in the present application.

When the staple driving head is released from the anvil, it rises under the influence of the spring 1'0, the portion of the device disposed on the rear section of thebase determining to what extent l the staple drivingv arm will rise under the urge of the staple arm spring 10. As the staple driver rises, another staple is brought into position in the staple track. by the urge of the staple follower spring.' 'I'he device is thus made ready for further use.

As soon as the machine is emptied of staples by `time operation of the staple driver, the magazine v,xliaybe relled in the same manner in which it spring, this is accomplished by rotating the staple follower spring shaft in .the clockwise direction. Deformed or defective staples are broken apart or cut into pieces by the staple driver forcing the legs thereof lagainst the face 8012.

The length of the beam is such that the staples may be placed a great distance from the edges of the sheets to be stapled. The character of staple deformation has already been discussed. The staple carrying arm is capable of varied adjustment, 'stops being provided for limiting the upward movement thereof, and the spring tension therein being adjustable to control the rebound. s'

While several-forms of the invention are shown, it is not to be understood that the forms illustrated are the only forms which the invention may take. The scope of the invention is to be measured by the appended claims.

What I claim is new and desire to secure by Letters Patent in these United States is:

1. A stapling device comprising a beam magazine having a discharge end and a loading end, a base of greater length than said magazine and having one end in registry with the discharge end of said magazine, and an extension member in alignment with said magazine secured to and projecting a substantial distance from the loading end thereof and pivoted to the other end of said base to provide a loading throat for said device between said base and said magazine of substantially greater depth than the length of saidmagazine.

2. In a stapling device, a base, astaple driving part, a rotary anvil in said base and having selected sections cooperating with said staple driving parts to clinch staples, and means for positively locking said anvil in any selected position comprising spaced apart recesses in said anvil, and a dog havinga pivot at one side of said anvil and an operating handle -at the other side thereof mounted on said base and having a tooth intermediate its pivot and said handle insertable into a selected recess. i

3. In a stapling device, a base, a staple driving mechanism pivoted thereto, an anvil mounted .transversely of said base and rotatable to selectively determine a section thereof to be used for clinching a staple, and means for positivelyv .locking sairlanvil against rotation comprising spaced apart recesses in said anviland a substantially horizontal dog mounted longitudinally of said base and transversely of said anvil and having a tooth insertable into a selected recess..

the bridge of such staple and normal to the di rection of the leg of the staple before deformation. 1

5.. In a stapling Adevice employing a preformed U-shaped staple, a stapling anvil having a die 5 seat provided with an undercut part .adapted tov deform a leg of such staple into a hook the body of which lies in a plane parallel to the face of the anvil.

6. In a staple driving device having a magastaple driver, a. follower for staples, and a cover for `said housing having a spring-like section projecting awayfrom said housing and forming a cushion stop for said follower.

8. In combination with a staple driver, a housing, a magazine projecting therefrom, a follower in said magazine, andJa cover for said housing and having a spring-like portion projecting away from said housing and over said magazine and forming a cushion stop for said follower.

9.. In a stapling device, a housing having transverse walls, a section of said walls having flat faces parallel to the bridge of a staple and forming a track-for unobstructed movement of such staple, andanother sectionof said Walls having faces with complemental opposed irregularities 3o 'obstructing the free passage of such staple and deforming the bridge thereof when such staple is forced therepast.

10. In a staple driving device having a magazine, and a staple follower in said magazine, a

spring for said follower, and a shaft for said spring, said shaft having parallel openings thereacross,'and s dv spring having end furcationsA insertable into said openings.

` 11. In a staplingdevice, a housing having an 40 eccentrically shaped aperture in the side thereof, a magazine, a follower in said magazine, a spring i for said follower, and a shaft for said spring having a head normally held against rotation by the walls of the housing about said eccentrlcally shaped aperture and rotatable therein when displaced against the tension of said spring. i

12. Spring holding means in a stapling machine having a staple magazine, a follower in said magazine, and a spring for said follower, and

comprising a housing having a toothed aperture therein away from the periphery thereof, and a shaft for said spring and having a toothed head posed. in said aperture and forms a shaft for saidspring.

14. In combiation, a staple driving head, a

shield-like aperture therein, and a atmember 60 rectangular inform, one end of which is dismagazine for staples, extension members on said magazine,a base to which said extension members are pivoted to support said magazine, and spring means adjustably disposed with respect to said extension members for limiting upward movement of said driving head. 15. In a stapling device, a beam magazine for a. preformedstaple having a bridge, a housing at the discharge end of said magazine and comprising members spaced apart a distance substantially equal to the thickness of and form- "F6- ing a track for the discharge of such staple, such track comprising two sections, one section being adjacent the discharge end of said magazine and having fiat opposed walls parallel to the bridge of such staple, and the other section being a continuation of the rst section and having opposed walls areas of which are not in parallelism with the bridge of such staple.

16. A stapling device comprising a beam magazine having a discharge end and a loading end, a base of materially greater length than said magazine and having one end in registry With the discharge end of said magazine, magazine supporting members having an end pivoted to the other end of said base, connecting members between the loading end of said magazine and the free ends of said supporting members for holding said supporting members and said beam magazine in alinement, said supporting members projecting from said magazine for providing a loading throat for said device between said base and magazine substantially more extensive than the length of said magazine, spring means actuating said supporting members to lift said magazine, and means for determining the height to which said magazine may be lifted under the urge of said spring.

VV17. A stapling device comprising a beam magi azine having a discharge end and a loading end, a base of materially greater length than said magazine and having one end registry with the discharge end of said magazine extension members at the other end of said base and pivoted at one end thereto, connecting means between the free end of said extension members and the loading end of saidmagazine for maintaining said magazine and extension members in alinement and for providing a loading throat for said device between said base and said magazine substantially more extensive than the length of said magazine, and means upon said extension members for regulating the angular position of said magazine relative to said base.

18. A staple driving head comprising a plunger, a driving blade secured to said plunger, a housing about said plunger, and pins having rollers thereon to form bearings for said plunger.,

19. A staple anvil comprising a body having a depression provided with an undercut portion for forming a semiloop ina staple, and means for preventing axial movement of said staple in said anvil during its defamation.

20. In a stapling machine, an anvil having a seat provided with a shouldered section at one y end to spread one leg of a staple and to arrest the movement thereof', and a grooved section and an undercut part at the other end to deform the other leg of said staple into an arcuate section lying in a horizontal plane.

21. In a staple driving device, a staple driving section comprising a beam magazine for staples having a loading end and a disch'arge end, a base, and paired parallel complemental members pivoted to said base and secured to the slides of said beam magazine adjacent to and projecting from its loading end in alinement therewith to provide a loading throat for said device in said magazine, in combination with a spring for said follower and wound within said housing, and a leaf spring secured to said follower spring at its end to facilitate attaching of said wound spring, the two springs separating one from another away from such end.

25. A terminal for the free end of a staple follower spring for use in a staple driver, comprising the combination with said staple follower spring of a leaf spring, a clip fitting over said staple follower spring and said leaf spring, and fastening means extending through said staple follower spring, leaf spring, and said clip.

26. In a staple driving device, a housing, a staple driver in said housing, and a die block, the housing and die blockforming a track for the discharge of a staple, said parts having irregularv faces, and said driver having opposed faces complemental to the adjacent faces of said housing and die block.

2'7. In a stapling machine, a housing having a keyhole slot in one side, a staple magazine, a follower in said magazine, a spring for said follower, and a shaft for said spring having a rectangular head rotatable in the circular part of said slot and held against rotation in the extension portion of said slot.

28. The combination described in claim 12, and in which the teeth in said housing and said head are arranged to facilitate a winding of the spring to increase the tension thereof, and A to rmly resist unwinding of the spring. l

29. Spring holding means in a stapling machine having a staple magazine, a follower in said magazine, and a spring for said follower, and comprising a housing having walls with an aperture of irregular configuration therein, and a shaft member comprising a at sheet of material extending from one wall to the other wall of said housing and seated and braked in said aperture, said shaft member having extensions from the body thereof intermediate said walls and folded about said shaft, and said spring being rolled about said extensions.

30. The combination described in claim 13,

land in which said yshaft member comprises a blank having a central slot and extensions folded angularly to provide an arbor for said spring,

charged therefrom, a staple discharging plunger,

and means upon one of the walls of said head for engaging and deforming the bridge of a staple laterally to support said bridge against buckling while being driven into material.

32. A staple driving head comprising walls forming a staple discharge path, one of said walls having a section possessing ribs extending in parallelism with and of a length substantially equal to the length of the legs of a staple driven therepast and providing a stop for a preformed staple before being driven, said ribs engaging the in- 34. In a staplingfdevice, a head having a side wall with an aperture therein, said aperture being away from the edge of said Wall, a spring in said head, and a. shaft for said spring, said shaft and said aperture having complemental and cooperating teeth adapted to interlock under the tension of said spring.

35. In a stapling device, a head having a side wall with an aperture therein, said aperture being away from the edge of said wall, a shaft in said head, and a spring on said shaft, said shaft and said aperture having complemental and cooperating teeth adapted to interlock under the tension of said spring.

36. In a stapling device, a head having a wall with a keyhole slot therein away from its edge, a shaft having a rectangular section adapted to be seated in the complemental extension of said slot, and a spring on4 said shaft the tension of which prevents the unseating of said shaft from said extension.

37. In a stapling device, a housing, having ,vertical parallel side walls, ashaft in said housing, and a coil spring, said housing in proximity to said shaft having inwardly directed transverse tangs the edges of which engage the edges of the coiled spring to arrest movement of said spring axially of said shaft.

38. A stapling device having a housing with walls forming a path for a staple as it is driven into material and coextensive in Width with the bridge of said staple, said walls having one section with straight fiat parallel walls spaced apart a distance equal to the thickness of th'e staple 'materiaL and another section having oppositeiy undulating complementary walls deforming the bridge of a staple into a multiplicity of transverse curves.

39. A stapling machine comprising 'a U-shaped housing, a die block arranged transversely of said housing and providing therewith a stapledischarge path, said die block having an inverte:l U-shaped opening therein, a beam magazine com prising an inner and an outer member between which staples are advanced for discharge one at a time throughsuch staple discharge path, said -inner member at its front having its sides removed to provide a lip extending through the U-shaped opening in said die blockand partly surrounding the tongue thereof, and said outermember also having sections of its sides removed arid registering with the opposite wall of the U-shaped slot, the material of said outer member engaging the rear of said die block.

40. A stapling machine comprising a housing U-shaped in cross section, a die block arranged transversely of said `housing and having at its rear face parallel longitudinal shoulders, said die block having an inverted U-shaped slot there in, and a magazine comprising a U-shaped inner member having a front extension partly surrounding the tome in said U-shaped opening, and an outer member U-shaped in cross section and having a top and side extensions spaced o e from another, the top extension being dispos d in said U-shaped slot and the side extension.; being seated against the material of -said die block at the shouldered sections thereof.

lil. A stapling machine comprising a housing U-shaped in cross section, a die block arranged tversely of said housing and having at 'its rear face parallel longitudinal shoulders, said die block having an inverted U-shaped slot therein, and a magazine comprising a U-shaped inner member having a front extension partly surrounding the tongue in said U-shaped opening, there being a space at each side of said member beneath saidy extension and between its front end and said die block to provide an ever open passage auxiliaryto the staple path between the die block staple driving head having therein a die block providing a staple ejection chute and having a transverse opening, and a magazine comprising upper and lower guide members for staples, theupper member engaging the opening in said die block from one direction and the lower member engaging the opening in said die block from anf other direction to position said die block in said driving head.

44. In a stapling device, a housing U-shaped in longitudinally transverse cross 'section for a staple driving mechanism, a beam magazine for staples in said housing, a spring coiled about an axis in said housing and operating a. staple follower, a staple follower in said magazine, and a cover plate to close the open side of said U-shaped housing, said cover plate having an inwardly bent section in alent with and engaging said spring to prevent said spring from being sharply bent as it is withdrawn from the magazine.

45. In a stapling device, a staple driving tool, and a staple discharge chute into which a preformed staple having a straight bridge portion is received, said chute and driving tool coacting with one another and with such staple to laterallr deform the bridge of such staple 'duringits movement through said chute. K

46. In a stapling machine. a staple driving and a discharge chute through which staples are ejected one at a time by said driving mech, there being ribs projecting into said discharge chute away from the legs of a staple therein to engage the bridge of such staple andV and housing, and an outer member U-shaped in to support such bridge from buckling or bending as such staple is being discharged from said chute into material by said driving tool.

47. A stapling machine comprising an ejection complemental to the ribs in said machine to form a clearance space between said tool and chute.'

48. In a stapling machine having a staple discharge chute, a beam magazine for staples comprising a core upon which staples ride, guiding means directing the staples along said core, a die 'block forming a wall of such ejection chute and having an opening in such wall, the ends of said core and 0f said guiding means extending through such opening in said die block and being substantially flush with such wall of the ejection chute, said beam magazine delivering staples to vsaid chute, and said die block having cutting edges to sever bent or crooked staples and an aperture adjacent said cutting 'edges and removed from such chute through which parts of severed staples may fall.

49. In a stapling machine, a housing, a reciprocal staple driving plunger in said housing and `having bearingwalls, and antifriction means in said housing operative upon one .of said walls during the reciprocation of said plunger within said housing.

50. In a stapling device, a. staple magazine, a

staple follower in said magazine, a staple follower spring, connecting means between said followerV spring and said follower, and a cushioning means upon said connecting means.

51. A stapling-machine having a die block providing a portion of a staple ejection chute, a staple driving means, and a staple magazine comprising upper and lower guide members for staples, the 'upper member engaging said die block from one direction and the lower member engaging said die block from another direction, and said members guiding staples through said block into said ejection chute.

52. In combination, a staple driving tool, and a staple driving head therefor comprising walls forming a staple discharge path, said head having at least one wall with a rib positioned therein away from the legs of a staple, said rib engaging the bridge portion of a staple to prevent such staplelegs are driven into and through material.

53. A stapling device comprising a base, a beam magazinefor staples having a discharge end and a loading end, extension members upon the sides of said magazine and extending i'to the rear of the loading end of said magazine and pivoted to said base, and spring means for elevating said beam magazine from said base, said spring means being positioned to the rear of the pivot between said extension members and said base.

54. In a stapllng device having walls `forming a discharge chute, a magazine for staples; and a die block at the end of said magazine and forming apart of the walls of such staple discharge chute, said block having an inverted U-shaped slot therethrough, said magazine comprising opposed parts one of which is upon the upper edge of the tongue of material forming the interior face of such U-shaped slot in said block and the other part being upon theA outer face of said U-shaped slot, and there being a space between said magazine parts for staples to slide to such discharge chute.

55. In combination, in a stapling device having a staple discharge chute, a staple driving tool, a beam magazine for staples to be fed-to said tool and comprising a member forming a staple track upon which staples ride and guide means to maintain staples on said track, and a die block forming the rear Wall for-such staple discharge chute and having an opening therethrough, 'thematerial of said track and of said guide means extending through the opening in said die block and the ends of said track and guide means being substantially ilush with the face of said block forming the rear wall of said ejection chute whereby said staple driving tool may act upon staples in said magazine one after another to drive them out of said discharge chute.

56. In a stapling device having a discharge chute with front and back walls, a beam magazine for staples comprising a core forming a staple track and guide means to maintain staples on said track, and a die block having an inverted U-shaped slot therein, the material of said core extending through the U-shaped slot in said die block and partly surrounding the tongue of material in said block forming the inner face of said U-shaped slot, the material of said guiding means also extending. through said U-shaped slot, and the front ends of said core and of said guiding meansand the front face of said die block being in substantial alignment and forming the rear wall of such ejection chute.V

57. In a stapling device having walls forming a discharge chute through which staples are disbridge portion from buckling or bending as the charged one at a time, a beam magazine for such staples, a staple driving tool for discharging,

such staples, and a die block having a slot therein and forming one of the walls of said discharge chute, the ends of said beam magazine extending into said slot and being substantially flush with the front face of said ejection chute, and a portion of said die block extending above said magazine and forming a rear guide for said driving tool.

58. In a staple driving device, staple driving means, a driving tool in said means, a staple carrying arm, there being a staple discharge chute between said arm and driving means, said arm having a face with ridges projecting into said chute to act as supporting means for a staple and said driving tool having complemental grooves to clear such ridges and to prevent fric.