US2103551A - Stapling device - Google Patents

Description

Dec. 28, 1937. w. G. PANKONIN l 2,103,551

STAPLING DEVICE.

Filed oct. 18, 1934 ssheets-sheet 1 Dec. 28, 1937. w,l Q PANKoNlN 2,103,551

STAPLING- DEVICE Filed oct. 1a, 1934 s lswam-sheet 2 Dec. 28, 1937. w. G., PANKoNlN 2,103,551

STAPLING DEVICE l 1 Filed'oct. 18, 1934 s sheets-sheet s Patented 28, 1937 PATENT OFFICE A STAPLING DEVICE William G. Pankonim Chicago, 111. Application October 18, 1934, Serial No. 748,803

33 Claims.

- One of the objects of this invention is to provide a. stapling machine having an improved con-- struction of the housing for the staple driving mechanismj and an improvedv construction of the parts included within said housing for providing the support for the staple driving plunger,

full stroke mechanism, and follower. spring, wherebythe plunger and the support members may be readily disassembled'from said housing for replacement or repair; v

Another object of the invention is to provide a stapling machine having an improved construction of the guiding means for the staple driving plunger whereby the same is accurately and movably supported with a amount of frictional resistance to its operation. y

Another objectof the invention is to provide a stapling Amachine having an improved construc- `tion of thestaple driving plunger and staple driving blade whereby the blade has relative. movement with respect to, the plunger to lessen the possibilities of fracture of said blade during operation of said machine.' 1

Another object of the invention is to 'provide a stapling machine having an improved construction ofthe staple driving blade whereby it aids in preventing the buckling of the bridge portion 'of a staple during driving thereof.

Another object of theinvention is to provide a stapling machine having animproved type -of ejection lchute wherein rearward support and guiding means isl provided for the staple driving Ablade while in jected into the ejection chute from the staple magazine.

position raised above staples pro- Another object of the invention is-to provide a stapling'machine having improved means for providing a guide and support for the plunger raising spring. "f Another object of the invention is to provide a stapling machine having improved means for securing the housing for the staple driving mechanism to the staple magazine.

Another object ofthe inventionis to provide a stapling machine having an improved construction ofthe magazine for staples whereby the same can be inexpensively manufactured with a minimum number of'parts.

Another object ofthe invention is to .provide a stapling machine having an improved means `for supporting the coiled follower spring within the housing for `the staple driving mechanism whereby the spring may be readily removed and whereby the tension of the coil spring tends -to maintain the means for supporting the same in position within the housing.

Another object of the invention is to provide a stapling machine having an improved staple deforming anvil providing means for deforming the legs of a Staple in a plurality of different forms at the selection of the operator.

Another object of the invention is to provide a stapling machine in which the means for maintaining the staple carrying mechanismand asso- 1o ciated driving mechanism spaced from the staple deforming anvil is of improved construction to provide simplicity 'and adjustability thereof.

A still further object of the invention is to provide a stapling machine having combined therewith an adjustable slitting tool whereby objects are simultaneously stapled and provided with outs or slits therein adjacent the clinched staple. l

T hcse obiects and such other objects as may. hereinafter appear, are obtained by the novel construction, unique arrangement and improved -combination of elements comprising the invenshowing of the full stroke mechanism;

Figure 2 is a plan viewof the -device shown in Figure 1, the handle being removed and a part of the cover sectioned;

Figure 3 is an end elevation partly in section of the same machine; l

Figure 4 -is an irregular section taken on the line 4-4 of Figure 1;

Figures 5 and 6 `are longitudinal and transverse details, partly in section, of a second form of skeleton beam magazine suitable for fuse in the device shown in Figure 1.

Figures 'I and 8 comprise a longitudinalsec- 45 tional detail and a fragmentary front elevation of a third form of skeleton magazine which may be used;

Figure 9 is a plan view ofla double rivet used for assembling the magazine and the housing; A

Figure 9A is a plan view. of a single rivet, a pair of which may be used ori-each side of the` housing.

Figure 10 is a fragmentary section on the line Ill-I0 of Figure 1;

Figure 11 is a fragmentary transverse section on the line II-I I of Figure 1 the slitting members being omitted for sakev of clarity;

Figure 12 isf'a detail partly in section of the spring magazine follower spring core Figure 13 is a plan view of a top end or a bag stapled and slit by the apparatus shown in Figure 1;

Figure 14 is a longitudinal section of a fragment of the bag shown in Figure 13;

Figure 15 is a front elevation of a second form of bag slitter and of the anvil used in connection therewith, the anvil being partly in section;

Figure 16 is a plan view of a bag which has been treated in a stapling device having a slitter and anvil like that shown in Figure 15;

Figure 17 is a fragmentary detail of a third form of slitter and of an anvil for use therewith;

Figure 18 is a plan view of a bag after treatment in a device having a slitter and anvil similar to those shown in Figure 17;

Figure 19 is a transverse plan detail of an anvil having a cutting edge suitable for use with the slitter shown in Figure 1 ;I

Figure 20 is a fragmentary view of a staple driving tool having its corners beveled;

Figure 20A is a similar view of a staple: driving to'ol having each of its corners cut back;

Figures 21 and 22 are side elevations of staples deformed in an apparatus like that shown in Figure 1 and in Which the staple driving tool is of the character illustrated in Figure 204;

Figure 23 is a transverse section on the line 23-23 of .Figure 1 and illustrating the magazine follower;

Figure 24 is a transverse fragmentary section taken on the line 24-24 of Figure 1; and

Figure 25 is a rear elevation of the magazine follower spring anchor.

Figure 26 is a perspective view of a group of staples cemented together each having a single projection in the bridge thereof;

Figure 27 is a similar view of another group of staples similarly secured together and eachhfaving a series of projections in the bridge thereo I i Figure 28 is a similar .view of a third group Aof staples cemented together, each having a forwardly and rearwardly projecting projection thereon;

Figures 29, 30, and 31 are fragmentary transverse sections of staple housings suited for use with the staples illustrated in Figures 26, 27, and 28;

` Figure 32 is a fragmentary plan view illustrating a compound anvil in which each anvil has a spacer limiting movement of the staple. driver head, and the movable anvil locks with the stationary anvil to prevent lateral movement;

Figure 33 is an end elevation, partly in section, of the movable anvil seated upon the stationary anvil;

Figure 34 is a detail in vertical section lof a modified form of baseand beam adjustment;

Figure 35 is a fragmentary plan view of a base-having thereon a rigidly mounted anvil and an auxiliary anvil slidable thereover longitudinally of the basethe auxiliary anvil being at one side of the rigid anvil;

Figure 36 is a fragmentary elevation of the parts shown in Figure 35, the full lines' being with the slidable anvil removed from `and below the top of the rigid anvil, and the dotted lines with the slidable anvil above the rigid anvil.

Like reference characters are used to designate similar parts in the drawings and in the following description of the several illustrated embodiments of the invention.

For convenience the various parts of the device as illustrated will be described independently of one another as far as possible and their interrelation pointed out as each new part is considered or in the statementv of the operation of the device.

The base The stapling mechanism is disposed upona base or platform. The base provides a mounting for an anvil, vwhether single or compound, and a support for a beam magazine. Between the base and the beam magazine is a spring for retracting the beam magazine after use of the device. Between the base and the beam magazine is an adjusting means which may operate in conjunction with the spring just mentioned. The

anvil is at the front of the base and the remainder of the parts mentioned are at the rear end thereof.

The base I0 comprises a rectangular inverted dished member having a lower edge II which normally rests upon a desk or other fiat support.. ing surface when used as a stapling device. With the base I0 removed, the device may be used as a tacker. The base I0' has a top flat transverse surface I2 which is generally in the same plane throughout its length but which, (as shown) is upwardly offset at the front of the base as shown at I3 in Figure l. In the odset section I3 is a permanent anvil I4 which comprises a transverse body I5 in which clenching seats I6 are formed.

At the front of the anvil are sections I1 which extend forwardly and which may be in the form of legs or which rmay comprise a section as wide as the body of `the anvil. Screw holes are drilled through the legs or extensions I1 `and bolts I8, or other suitable fastening members are' inserted through the apertures into the elevated section I3 of the base I0. The bolts are secured therein in any suitable manner as, for example, by nuts I9 threaded into the shanks of the bolts and engaging the under side of the base I0. Other fastening means, such as rivets, may be substituted for the bolts and nuts.

At the back of the anvil I4 are extensions or legs 20 between which a wing .2I forming a part of a movable anvil 21V-may be pivotally connected. When preferred, the movable anvil 22 may be mounted directly upon the raisedplatform I3 of the base Ill. Any other suitable mounting may be substituted so long as-the movable anvil 22 may be moved about a pivot to a position over the permanent anvil or to a position removed therefrom to clear the permanent anvil for the reception of staples driven thereagainst by a staple driving hea'd, later to be described. The movablev anvil when inusable position registers with the same driving head as the permanent anvil.

In addition to the wing 2l which ispivotally connected at 23 to thepermanent anvil I4 (or to the platform I3 of the base I0), the movable anvil comprises an offset section 24'in which staple deforming or clenching seats 25 are formed. That part of the anvil in which the seats 25 are formed is adapted, when in use, to lieiiatly upon the body of the permanent anvil I4 in alinement with the staple discharge path in the staple drivlng head as previously indicated.

60 Pllrln'lse.v The spring 29 has a from the anvil itself, or\they may be formed ofadded studs or pins. In the clinching action, the sloping portion of the anvil clinching seats causes where the staple leg, as it projects through the vmaterial being stapled, leaves such material. Since the portions or lugs I 5a and 22b project above the upper surfaces of the respective anvils thereby increasing the distance between the material and .the sloping portion of seats,v the moment of force required tobend the legs of'thestaple is increased and the relative pressure required to clinch the staple reduced.

It will also be seen that by spacing the material from the topsurface of the anvil, the driving head will also be spaced therefrom. Given: a constant thickness of material to be stapled, the proportioning of the portions I 5a and 22h will directly affect the shape of the clinched legs of the staple. For example, if it is desired to deform aA staple as shown in Figure 22, but with less curve at the ends. it is only necessary to raise the portions |5a and 22b on the anvils and provide a greater clearance space between the driving head and the surface of the anvil. If the curved ends of the staples are to be increased as shown in Figure 22, the clearance space should be reduced.

Thus, by varying the heightof the pressed out portions I 5a and 2217 on the anvils, the shape of the ends of the staples may be varied.

At the front of the base vlil fand in front of the platform I3 is a more elevated transverse part 26 whichrises to aheight equaling at least a fraction of the height of the legs I1 of the permanent anvil The front edge 2'i`of the permanent anvil vI4 is beveled and the entire frontl edge 26 of the movable anvil is beveled in a complemental manner. The part 26 and the several bevelled edges o just 4described facilitate the insertion of paper I into the throat of the machine whenopen, the parts described and illustrated comprising no pronounced obstruction in the path of the articles to be disposed on either anvil whichever one is in use.

The movable anvil is maintained in either of its positions, that for operation, or that out of range of the staple `driving. tool, by a flat spring Y- 29. 'Other means could be supplied for this same tends to the rear of the elevated section I3 of the ase I l. Suchextension is anchored in the base y a rivet 3 l as shown, or by other suitable means. The'forward end 32 ofthe spring 29 is formed 35 by turning the body upwardly at 33 and then forwardly. 'I'he extreme-front section 34 of end 32 is turned down, The front section 32 ofthe spring projects through an aperture 36 in the base i0 provided therefor. Oneside or the .other of the- 70 wing 2| o f the movable anvil 221 rests upon the section 32 to maintain such anvil'in either of its twopositions. A The material adjacent the'pivoted end of the movable anvil 22 cams vthe flat upper faoef32 of jthe spring '29 to vvflex or distort the spring from the staple legs to bend about av point immediately the clinching' body 30 which exout of the path of the anvil as the anvil is moved, the spring 29 urging the anvil 22 in the direction of either of its two positions from either side of a position of dead center. The latter position exists only when the movable anvil is in a vertical unstable position. The turned down edge 34 facilitates the camming movement just described.

At the rear end of the base I0, the top portion thereof is divided longitudinally and the material turned upwardly to provide guides 36 for a beam magazine. Between the guides 36 thus formed is a pivot member 31 which may be a bolt secured in position by a nut. Intermediate the guides 36 and parallel thereto are complemental wings 38 upon a beam magazine.

f At the rear of the beam magazine (later to be more fully described) is a Z-shaped member 39 having its upper horizontal section 40 riveted to or otherwise secured to the beam magazine, a vertical section 4| depending downwardly and into the opening in the base between the guides 36 of the base Il), and a lower section 42. such lower section of its member 39 being horizontal and normally parallel with the top section of the base and slightly lower than the top horizontal plane i2 o'f said base I0.

Extending upwardly through an aperture in said lower section- 42 is ,a thumb screw 43 having a knurled head 44. Between the knurled head 44 and the horizontalsection 42 vthere is disposed about the shank of the thumb screw 43 a coil ,spring 45. Spring 45 acts as a lock for maintaining thethumb screw 43 in any. adjustable positionto which screw 43 may be moved with respect to the wing 42 through which its shank projects.

The upper' end of the shank of the thumb screw 43 extends above the top face section 42 of the Z-shaped member 39 and engages one section of a flat spring 46 which is employed for retractlng the beam magazine after a staple clenching stroke. The spring 46 comprises a front fiat section `41 which rests upon the horizontal section I2 of the base l0 beyond the aperture obtained by the formation of wings 36, a curved rising section 48 which extends upwardly to and slightly above the middle line of the pivoting bolt 31, a section 49 curved about the pivot screw 37 at least one hundred eighty degrees and preferably Aslightly more, a rearwardly sloping section 3 and a rear at end 5l, said rear end 5| extending beyond the aperture made bythe folding upwardly of the guides 36 and resting upon the rear flat surface yI2 ofthe base I0.

The fiat spring 46projects rearwardly through anaperture 52 arranged longitudinally in section 4l of the Z-shaped member 39. The aperture 52 extends from the lower extremity of the vertical section 4I thereof upwardly suillciently to provide clearance for the spring 46 whether or at its other extreme position. n

. The aperture 62 has such height that it allows an extra clearance space, so'when the screw 43 has beenv turned in the Z member its full limit of adjustment, such extra clearance will allow the beam magazine to ybe elevated by hand a distance greater than its highest mechanical adjustment. 0.

If andwhen desired, the adjusting Vscrew 43 may4 be omitted. `When the adjusting screw is omitted, the face 42 of the Z member would contact the underneath surfacey ofthe flat spring and hold the beamfin an elevated position at a xed distance'from the base. A modied adjustment the .adjusting screw-43 is at one extreme position means is illustrated in Figure 34. The member 39a has no lower step and has the shape o f an inverted L. The aperture 52a in the member 39a is the same as in member 39. The screw 43a is threaded into the base instead of the member 39a. spring 46a is threaded seats itself against the bottom of said spring. Adjustment of the screw 43a will raise or lower the spring 46a from the base. The member 39a pulling against the spring will thus raise or lower the beam magazine relatively to the anvil.

The aperture 52 in the Z-shaped member 39 combined with the crimping of the spring 46 about the under side of the pivot bolt 31 maintains the spring 46 in, longitudinal alinement between the guides 36 during operation of the device.

The beam The beam for the staple driving head may comprise any suitable core and any suitable staple guide member. In the machine illustrated, three different magazine beams are shown. Each is of what may be called askeleton structure. The staple guide member in each instance comprises a channel member 6|] having inturned flanges 6l at its top edges. The channel member 60, by its anges Sl, extends partly over the bridge of staples in the magazine and completely about the legs of such staples exposing a middle section of the bridge part' of the staple between .the inturned edges of the anges 6I.

In the form of the invention shown in Figure l, there may be struck up from the bottom of the channel member 60 at spaced intervals supports 62 comprising first a vertical section 63 and then a horizontal section 64. Supports 62 may be all struck up in one direction or the direction of different supports may be reversed as is shown in Figure l, in which figure the front and rear tongues 62 project toward the rear of the channel while the intermediate tongue 62 projects forwardly. The number of supports 62 is a matter of choice.

In the form of the device shown in Figure l,

there is a tongue 65 at the front of the channel member which is turned upwardly atI a right angle. Such member provides a part of the staple discharge chute or channel, guiding the bridge of the staple at the back edge thereof from its position at entry into the discharge chute to the bottom of the magazine. The bottom of the beam magazine or channel member 68 also comprises the bottom of the discharge chute.

Disposed upon and riveted or otherwise securely fastened to the upstanding tongues 62 is a strip 66 upon which staples ride. The strip 66 is counter-sunkeither for its entire length by the formation of a groove therein or at spaced intervals to receive the heads of rivets 61 or other fastening means inserted therethrough and through the horizontal section 64 of each o f the tongue members 62. In this manner, the fastening means 61 are positioned out of the path ofv the staples as they are propelled along the magazine from the loading or rear end thereof l I to the discharge or front end thereof.

Reversing the direction of one or more of the tongues 62 lends resistance to collapse of the members by a longitudinal relative movement thereof and substantially prevents any such movement under normal strains.

The iront end of the member 66 is seated upon The member 39a through which the the upwardly turned tongue 65- of the channel member 60 which latter has a central groove for the reception of the grooved portion of the staple supporting member 66.

In the form of the invention shown in Figures and 6 the channel member '60a possesses no upstanding tongues but has an upstanding front end 65a forming a part of the wall of the staple discharge chute. The staple supporting member 66a at spaced intervals therealong has downwardly projecting tangs or tongues 62a, the tongues 62a being of a width less than the width of the channel member 60a and resting upon the inner surface of the closed section of the channel member 60a. Rivets 61a are inserted through the tongues and channelmembers, 62a, the outer end of the rivet being flush with or countersunk upon the under side of the channel member 60a.

In the formof the invention shown in Figures 7 and 8, lboth tlie\channel member 66h and the staple supporting strip 66h have tangs 62h and 62o struck therefrom.` Tongues 62h and 62e are struck in a' complemental direction and a rivet 61h is inserted through the paired and complemental tongues 62h and 62C, such rivet being away from the top surface of the staple supporting member 6617 and away from the outer surface of the channel member 60h.

In the form of the invention last referred to the staple supporting member 66h has a downwardly turned tongue 65h forming a part of the rear wall of the staple discharge chute, such turned down portion 65h is'substantially as wide as the space between the legs of a staple and terminates in a narrow section 69 inserted in a. slot or complemental groove in the front end of the channel member 66h.

*The structure shown in Figure 8 may be employed -in the structure illustrated in' Figure 5. Member 66a may have a slot or other means to receive the upper end of section 65a and t therewith in a manner to prevent the part 65a from being bent away from the discharge chute. If bent away, this would Aenlarge the chute and cause the device to jam. i

There is thus provided in any one of the three forms of beam which have been described and illustrated, a skeleton beam comprising two members, one member guiding the staples, the other member supporting the staples, and one or the other of the members supplying a section ofthe rear wall of the staple discharge chute.

At the rear end of the beamin any of the forms of the invention shown, two wings 38 parallel with the side walls of the channel member are struck downwardly from the material of the channel member 60 and through the'se extend a transversely disposed bolt 31 secured in position by a nut; the bolt 31 also extending through the upwardly disposed wings 36 upon the base member I6. AThe bclt-31 is a pivot for the movement of the beam magazine. Parallelism of the beam and. base is maintained by the contacting of the adjacent faces of the upwardly struck wings 36 of the base I0 and the downwardly struck wings 38 of the channel member 60. Thisv horizontal section 48 of such Z-shaped member resting upon the interior surface of the channel member 88 adjacent, to thev aperture formed in the channel member 88 by the downwardly striking of the material thereof to produce the wing 1members 38 which serve as beam guides.

support are obtained.

In .the form of the invention illustrated, the flanges 8| upon the channel member 88 have at their front end upwardly turned ears 12. Ears 12 are in vertical parallelism and the front' edge thereof provides guide means'for a staple driver member which is ofthe usual at spring type. .The ears 12 at the front end ofthe channel 88 act as the rear guide for the driver when said driver is above the staple strip, and said ears align the driver with the ejection chute as the foremost staple is discharged. Thus the ears' 12" at the front end of the channel 88 and the tongue 65 also disposed at the frontend thereof provide guide means for the staple driver member both above and below the strip 88.

The staple driver housing At .the front end or free end of the beam maganotches for the reception of. tongues upon aA housing cover later to be described.

The housing 88 generally is of a blank of sheet metal folded to provide a front section 8| and identical side sections 82. Through the side sections 82 and through the side walls of the channel member 68 there is vinserted an elongated double shanked rivet 88, the exterior portion l88 of which comprises a bridge of almost thelength of the side 82' of the housing. At each end of the bridge there are tongues 85 which, as indicated above, project through the housing walls 82 and channel member 68 and are flattened upon the interior wall' of channel y88 to avoid interference with the movement of staples within' the channelv `88.

88 is obtained in which four transverse areas 0f The `cross sectional dimension of tongues 85 is an appreciable portion` of the side of the housing. 88 whereby strength of union is assured. The rivets may l `be made individual (see Figure 9A) of rectangular or square shape, or :they may be roundshaped, or the housing may be spot-welded to the beam.v vAny suitable fastening means may be employed so long as there is no interference with the free sliding-of the staples along the beam magazine. The externally exposed bridge 84 of the'connecting member 83 provides a convenient l means for gripping 'the housing 88`when-it--is desired to manipulate the device independently of the staple driver handle as when usedl as a tacker.

In the. lower section of the front 8| of the housing 88, that is, the portion into which the magazine projects, the front 8| 'may be forced outwardly \to provide the staple path 8|c.. The path Blois of the width of a. staple and provides Thus a rm 'n joinder between the channel 88 and the housing .forced against sections 8|b.

A section 88 of the front wall of the housing may be punched outwardly from the top edge downwardly to provide clearance for a rivet used in securingV thev staple driver upon the staple plunger body.

The present device has in the sides 82 thereof a punched out section 81, V-shaped in cross section, and providing a seat for steel balls. The balls 88 contact and guide the plunger in its downward and upward movements and reduce the area of the contacting bearing surfaces between the plunger and the housing. 'I'he top of the housing above the punched-out section 81 may comprise a substantially straight wall section, or it may be inwardly bentslightly as at 89. The bottom edge of the inwardly punched section 88 is the top extremity of the ball seat and prevents upward escape of the balls 88.`

t At the lower end of the ball seat, the material of the sides 82 is slit vertically and transversely to provide tongues 98, the tongues 98y being bent inwardly to present a at end surface diametrically of the spherical surface of the lowermostball to prevent downward displacement of the balls. Sufllcient play is had bythe spacing of the balls 88 loosely-between the sections 89 at the top of the race and the inwardly directed tongues 98 at the bottom of the seat to permit the balls to freely rotate in their respective positions within the ball seat as the plunger is reciprocated.

The rear edges of the sidewalls 82 of the housing comprise an oblique section 8|, a shortA vertical section 92, a substantially arcuate section 98 with a notch 94 therein, and a slotted section 95 having its lower edge parallel to 'and in substantial alignment with the top of the flanges 8|. Slots 95 are formed in the material vadjacent the tops of the sides and therebeneath are two indented or pushed in parts 91 parallel with the slots 98 but not in alignment therewith.

' The staple driver plunger In the form'of the vinvention illustrated, the

lplunger |88 comprises affront wall |8| ,upon

|88 is attached to the plunger |88 in any suitable' manner. The handle is rounded for the purpose of providing a smooth and properly shaped grip means and may comprise an internal member |85 secured to the vplunger |88 and a cover piece |88 extending over member |85 and crimpedto the under side thereof as shown.

When desired, the staple driving tool may be 'fastened atthe topand loosely suspended upon the'lowermost rivet, -that is, the rivet may be secured to the plunger but has no head to engage the material of the tool, thus permitting of a slight relative movement of the tool in respect to the adjacent wall 8| of the plunger while the tool is being supported against longitudinal movement along the `plunger by the body ofthe rlet on the shank of which it is laterally mova le.

As shown in Figure 1, the plunger driving tool |02 may be slightly offset to provide clearance, the upper section thereof 'being more to the rear of the device than-the driving section. The housing may be offset or pressed out to provide a clearance space between the driving blade and the housing, so that friction is eliminated and the ball bearings act as the guiding means.

It will be noted in Figure 20 that the corners of. the staple driving tool |02 are beveled atA |02a. The bevelextends inwardly to a point removed from the ends of the bridge approximately equal to the diameter of the legs of the staple. By removing lthe corner sections |02a of the staple driving tool, the body thereof is brought to bear upon the bridge of the staple intermediate the legs thereof so that wheny considerable resistance is voffered to the passage of the staple legs through material within the throat of the machine there will be a slight deformation of the staple bridge, such deformation being illustrated in Figures 21 and 22 which show staples driven therefrom. The staple in Figure 21 has closed ends and that in Figure 22 has spread-apart ends. The deformation is somewhat exaggerated in the figures but shows the shoulders or humps whichv are produced in the bridge of the staple adjacent the legs when resistance is had to the passage of the staple through thick or tough material. Figure 20A illustrates a second way ofA producing the same result. This is done by notching out the corners of the blade.

In Figures 20 and 20A, the driver has its cor.- ners removed. This allows that portion of 'the bridge of the staple just .over its legs to become forced into or seated into the cut away sections of the driver, as shown in Figure 20. This prevents the legs of the staple from backing up. It prevents the material of the legs from flowing into the bridge portion to buckle the bridge under the driving strain of the legs as they are forced into and through material. 'Ihis method of supporting the bridge from buckling or collapse elimi- .nates the use of the commonly employed spring means or mechanically controlled means for the same purpose. l

Integral with the front Wall |0| of the plunger are side walls |01. Walls |01 comprise two sections |08 and |09 which sections are complemental to and opposed to the punched out sections 81 of. the housing 80. The angular sections |08 and |09 of the plunger project inwardly to provide the opposite walls -of the ball race heretofore described.

The rear wall of the plunger at its bottom comprises parallel anges ||0 and depending from the side members |01. The flanges ||0 and come into close proximity at their contiguous edges and may actually contact. At the top, thev rear wall of the plunger comprises flanges H2, ||3, and ||4, theflanges I2, I3, and ||4 being in `a vertical plane forward of the vertical plane of flanges ||0 and Because the side walls of the plunger project rearwardly at their bottoms a distance greater than they do thereabove, the 'flanges I0 and provide a transverse step ||5 extending completely across the rear wall of the plunger.. Step ||5 is a stop meanscooperating with an insert member hereinafter to be described.` The bottom edge of the plunger' is notched at ||6 in each side |01 to receive the lowermost section of a spring guide, also late? to be described.

` and ||4 may contact at their contiguous edges.

Within the plunger |00 is a spring housing |25. This may comprise a strip of. relatively thin material folded into a U-shape. The closed section of the U is at the top of the plunger and may rest upon the under side of the driving handle.r It may be riveted or otherwise fastened if desired.

Each leg |26 of the member extends downwardly of the plunger at the side thereof, fitting snugly upon the interior face of the side walls of the plunger. At the bottom of each leg is a slot |21 in alinement with the notches ||6 at the bottom of the plunger, each slot |21 extending upwardly of the leg |26 a distance equal to the height of the bifurcated end of` a spring guide member shortly to be described. In the form of the spring housing illustrated, the width of the legs |26 at the bottom is greater than at the top to compensate for the difference in plunger depth at the top and bottom of the device.

Within the plunger |00 is a coil spring |30. The upper end of spring |30 engages the closed section of the spring guide housing |25 While the lower end thereof extends over the leg |3| of an inverted Y-shaped member |32 comprising the spring guide member. The spring |30 rests upon shoulders |33 formed 'adjacent the bifurcations of the spring guide member |32, the bifurcations |34 terminating at the bottom of the device in projecting lugs |35 and which are of va width equal to the width of. the plunger |00, the lugs |35 rest-ing upon top of the flanges 6| of the magazine guide member 60. Shallow slots to receive the ends of the spring guide member may be formed in flanges 6| but these are unnecessary.

The main body of the bifurcated section of the spring guide member has parallel edges which engage the interior side walls of the plunger extending upwardly in the slots |21 in the spring guide housing member. In this manner, the spring |30 is maintained against collapse or buckling and made to exert its full force in a unidirectional manner at all times.

The spring guide member |25 prevents the Y- shaped member |32 from turning and dropping between the flanges of the magazine guides. It thus prevents interference With the staples. The spring' about the stem of the Y-member and the slots of the guide member maintain the Y-member from displacement within the plunger.` When desired, the spring guide member |25 may be eliminated and the notches ||6 in each side |01 of the plunger may be carried upward. The Y- shaped member |32 may thus be guided from turning and displacement by the plunger slots H6 and the housing Walls. In such a structure, the spring would be guided by the inside walls of the plunger and by the stem of the Y-member.

' The full stroke mechanism aioassi movement of a pawl into and out of engagement with the teeth |20 upon the rear wall of the plunger |00. The upper notch |45 provides clearance for the p'awl mounting means.

Integral with the walls of the plunger guide insert member |40 are side members |41 which project to the rear of the housing. l The upper extremity of the side members |41 is parallel with the top of the wall 42 The side walls at the top are of greatest width and at |48 slope obliquely-rearwardly in a complemental parallel relationship to the wall 9| of the housing member 80.

There is a shoulderedl section |49 upon the rearedge of side members 41 which cooperates with a 'magazine follower spring anchor member later to be described.

Through the wider section of the side walls |41 are slots |50 which are complemental to the slots 95 in the side walls ofthe housing.

The back edges of the side members |41 ex- -tend downwardly beyond the lower edge of the transverse bearing wa1l 14| and terminate in two opposed inwardly offset hook like sections |5|,'the rear upper face of which are horizontal and notched, the notches |52 being open from above. The straight edge upon the -rear of the side members |41 between the wide section and the hook sections |5| engages the inwardly projecting parts 91 in the housingside walls to determine the position of the insert member |40,

the indentations 91 providing anchoring means for the insert member and preventing any rearward motion thereof so that the member |40 accurately guides the plunger.

Between the sides ofthe insert member and transversely of the member |40 is a shaft |55. 'At one side thereof and in registry with the upper notch in the wall |42 is a spacing Washer |56. Immediately adjacent thereto is'the pawl |51 which is loose upon the shaft |55.

Between the pawl |51 and the opposite wall |41 -and surrounding the shaft |55 is a coil 'spring |58 one end |59 of which is anchored upon the wall |42. body-of the pawl |51 and engages the side of a laterally projecting stirrup 15| on-said pawl |51 there being a groove |62 across stirrup |6| to end of the spring against displacemaintain the ment.

. Normal to the stirrup |5| the pawl |51 has a.

tooth- |63 the end of which is adaptedto engage in the teeth |20 in the rear wallofthe plunger.

Onev side of the lower rectangular slot |44 arrests the lateral movement of the pawl |51-.in one direction, such member being freely displaceable in the opposite direction within the conflnesof slot |44 while being concurrently movable about the shaft on which it flts loosely.

When the' plungeris in its uppermost position, the lower offset section of the plunger wall at step ||5 engages the upper offset wall |42 .of

` the-insertmember, the contact of the two walls at their offset sections limiting the upward move- 75 ment of theplunger. Whether the insert memangularly thereto.

|51 is such that it is freely movable in the cycle The other end is parallel'to the ber |40 is closely fitted to the plunger to act as a rear guide for the plunger, or there is a clear`v ance space between the members and the ball er. the offset section |42 Aacts as a stop for the plunger.'

When in such position, the pawl |51 is out of engagement with the teeth |20 on the plunger wall. Immediately a downward movement of the plunger is made, the pawl |51 is moved by a camming action rst'to the rear, and then along the back surface of the plunger wall and into and over the'teeth |20 one by o ne. If the downward 'movement of the plunger is arrested, the pawl 51 will engage one of the teeth |20 upon the plunger wall to arrest a retractile movement. The plunger will remain locked against upward movement until a full down stroke is completed.

As the plunger proceeds downwardly, the pawl |51 travels over the entire rack of teeth 20. At the completion of the stroke, the pawl 51 drops into the horizontal slot between flanges ||2 and H3 in the plunger rear wall. As the stroke of the plunger is completed, there is only one direction in which the plunger may be moved and that is upwardly. Because of the coil spring |30 within the plunger |00, the plunger |30 will retract the instant pressure is released therefrom. As it retracts, the pawl |51 is removed angularly by the oblique edge ||9`away from the teeth |20 and guided into the vertical slot between flanges ||3 and 4 and into the slot just above step ||5 whereit remains until the close of the upward movement of the plunger.

It then moves into alignment with the teeth by lateral projectionjn the slot between flanges H0 and I3. The pawl |51 during these movements rotates about its axis, the shaft |55, and The mounting of the pawl just described to make each downstroke complete and with complete freedom on the upstroke after the downstroke is complete. The pawl cannot again aline itself after a full down stroke,

hasy been made with the teeth |20 until a complete upstroke is completed so that once a full down stroke is completed, the device will remain inoperative until a full upstroke is had at which 'timeastaple is discharged from vthe magazine `into the magazine discharge chute.

The vshaft |55 upon which the pawlv |51 is mounted is held into place in the member |40 by the housing walls 8| as the member |40 is inserted therebetween. The shaft 55, however, including the full stroke mechanism, may be assembled directly upon the housing walls 8| and anopening cut into the side walls ,of the insert member |410 to clear the shaft |55. The former construction is preferred because the `full stroke mechanism may be assembled upon the insert member |40, and the follower spring and its mounting, later to be described, may also be assembled upon such insert member. The unit including the` insert member, the full stroke' mechanism, and the follower spring may then be inserted between the side walls of the housing.

'I'he insert member |40 acts as a spacing member for the housing walls. As previously stated,

-it may or may not forml the rear bearing for the plunger. It does form a stop for the plunger in its upward movement, a mounting for a full stroke mechanism, and also a mounting for holding a member having a spring coiled thereabout to operate a staple follower. Y.

. with the top edges of the insert member andv In the assembly of the device, the plunger is first positioned with the spring |30 therein and the spring guide |32 is disposed upon the flanges 6| of the magazine. The spring guide is then madeto enter the slots within the spring housing to prevent it from turning. Insert |40, including the full stroke mechanism, and

which may or may not include the follower spring and its mounting, is next positioned by moving it inwardlyof the device at the upper sectionvof the housing so that the vertical rear edgesthereof seat tothe front'of the lugs 91 the top edges of the housing registering.

The inwardly offset portions of the side walls of the insert member |40 facilitate the insertion of said member |40, the offset portions clearing the indented lugs 91 of the housing walls 82.

When in this position, an assembly bar or bolt |10 is inserted through the registered apertures 96 and |50, the member |10 having a beveled front end |1| to facilitate insertion. At the other end |12, the member |10 is enlarged to limit inward movement and to provide a handle.. At the center of the body of the assembly bolt |10 there is a threaded hole |13, the purpose of which will later appear.

Magazine follower and spring The magazine follower and magazine` spring may-be conveniently assembled one with the other and sold as a separate and replaceable unit. 'The follower itself comprises a channeled member v|80 having an offset section |8| at its rear. The

flanges and cross section of member |80 ride on member 68 and are heldin position by member and flanges 8|. To the offset section |8| a handle |82 isriveted. The handle comprises a lfront transverse body part |83, side members |84 that extend rearwardly to provide grip pieces |85, and a forwardly extending narrow section |86 having a transverse horizontal slot |81 in l which thegend of a magazine spring |88 is anchored by a staple or other suitable means after being folded upon itself and inserted through the slot |81. A staple |89 similar to that employed in'the device with its ends clenched provides a satisfactory anchor.

The'other end of the spring |88 is coiled about an anchor member |90 which vcomprises side members |9| vhaving two parallel cross bars |92 shown. The stem |95 of the T-shaped memberforms a rest for the inner. lamination of the spring and the cross bar |90 of the T-shaped member forms a.` core about which the spring The spring anchor |88, in its assembled position, has a substantially vertical body comprising the side members |8| and a forwardly disposed lower e'nd divided into three sections |81, |98, and |99. Section |88 is narrower than sections v|91 and |88. The forwardly projecting oblique section v|01 is. of reduced breadth and terminates in the downwardly projecting substantially vertical section |98 at the end of which are the tongues |99. Tongues |99 are inserted between the material of the hook-shaped part |5| of the insert member |40, a section of the part |88 being disposed in the vertically extending notches |52 in the hook-shaped part |5|.

The top edge of the spring anchor at its corners has shoulders 200 adapted to be inserted under the shoulders |49 of .the insert member. At the top of the spring magazine anchor |90, there are two inwardly directed tongues 20| which are spaced apart a distance less than the width of the spring |88. The tongues 20| present barriers against the escape of the spring |88, and thus the spring |88 may not unwind once it has been coiled. The space betweenthe lugs or tongues 20| is such that the convolutions of the spring may be inserted therebetween one or more at a time when slightly twisted. The

' outer surface of the lugs 20| is beveled to facililtate the insertion of the spring from either direction. v

The upper portion of the spring support |90 is adapted to rest upon the edges in the insert member |40, the upper outer edge of the spring holding member |90 being adapted to be seated under the shoulders |49 when the lower end of the spring'support member is disposed in the hook-shaped sections |5| of the insert member,

the shoulders maintaining the spring support.

member |90 against vertical displacement.

'I'he support member |30 may be guided laterally by its shoulder partsv |99- 200 intertting with the insert member |40, or by its outer edges |90a, |9| a fitting between the housing walls 82. l

Under the influence of the coiled spring |88 the member 90 tends to rotate in a counter-clockwise direction about the shoulder parts |99 and with a force greater than the resulting rearward lateral pull placed on the cross bars |92|93 when the free `end of the spring is `pulled rearwardly. Thus, by hooking the shoulders |99 within the hooks |5I, the upper shoulders 200 will snap forwardly into place and nest within the Shoulders |49 on the member |40 to maintain the member |90 in its proper place without other fastening means. To remove the member |90, the top portion is tilted rearwardly until it has cleared the shoulder |49, and then the member may be lifted upwardly and out of the hook portions of member |40.

The side members |84 of the staple follower are in parallelism with the sidewalls of the housing and are adapted to be drawn along the beam magazine as it is emptied until in contact with s the material comprising the slotted part 95, such engagement arresting the advancing movement of the follower |80 with the front end of the staple follower |80 at the end of the magazine beam but not depending into the staple discharge path or chute.

AThe housing walls 82 extend upwardlyand above the guide member 80 of the magazine at 80a.' In loading-staples into the magazine, the follower is withdrawn from the magazine and placed betweenthe housing walls at a. This top Surface of the flanges 6|, and also prevents the edge of the followerentering the space between' the flanges 6| and interfering with the Y staple track as the staples are being loaded on [said track.

Aprevents the follower from slipping from the wide and short section which is adapted to be inserted into then'otches 94 in the housing and a narrow and long section which projects therebeyond and engage at one edge the interior of the housing to prevent lateral displacement of the cover at its bottom.

Adjacent the top of the cover and upon the oblique section thereof are ears 204 which are folded inwardly to tvsnugly over the oblique section 9| in the side walls of the housing. The ears 204 facilitate positioning of cover upon the housing member and prevent lateral movement thereof at the top. For assembly purposes, the ears 204 aid in positioning the cover and prevent the sidewalls of the housing from spreading.

An aperture 205 in the vertical section of the cover is in registry with thethreaded hole |13 in the assembly bar |10. A screw 206 may be inserted through aperture 205 and into threaded hole |13. When so inserted and run home, the

screw 206 rmly secures the cover plate in position and prevents disassembly of the device.

The cover plate, when locked into position, maintains the member '|90 against accidental displacement. 'I'he holding means for the cover locks the entire mechanism and the parts within the housing 8| (except the magazine) in assembly. 'I'he assembly bar |10 may be round orl square shaped and it'may lbe made of tubing or' other material shaped to hold the insert member |40 into position.

The slitter ing and vertically alined bosses 2|0 riveted to the outside of the front'wall 8| of the housing by rivets 2||countersunk to prevent interference with the staple driving tool. Slidably secured for lateral movement only along the bosses 2|0 is a positioning rack 2|2. A slitter member 2li, having its lower end provided with a cutting edge or blade 2|3, is carried by and vertically adjustable along the bosses 2|0 between the positioning rack.2| 2 and the Vwall 8| by means lof elongated slots 2|6 contained therein. As indicated at 2| 5, the rear face of the positioning rack 2 2 and the forward face of the slitter member 2|4 are provided with complementa] racks or interlocking teeth. It will be seen that with the positioning rack 2| 2 pressed inwardly against member 2|4, the interlockingv teeth 2|5 will prevent vertical movement ofthe member 2| 4 with respect to the wall 82, but upon moving the positioning rack 2|2 laterally away from the wall 82 vertical adjustment of the member 2|4 is permitted. The lateral movement of positioning rack 2|2 is controlled by screws 2|? threaded in the bosses 2|0.'V Upon operation of the plunger to drive a staple againsttheanvihlthebeamavill be depressed so that cutting edge or device carried by the slitter member 2|4 will then beforoed into engagement withA an lappropriate shearing edge carried by the anvil or base thereby causing slits to be cut in the same material through which the stapleis being driven.

As shown in Figure 19, a shearing edge 2|8 is provided upon thevfront body section of whatever anvil is used in the device.' The edge 2|8 normally is transverse of the base of the maof the staple andof the slit being shown in Figure 13. In that iigure, there is a bag 220 the end of which has been folded over as is shown in Figure 14, the folded-over section being held in position by the staple 22|, and the slit 222 extending through the body of the bag and through the folded-over section to provide means for readily hanging the bag.'

In Figure 15, another form of slitter is illustrated. The slitter 230 comprises a main slitting member 23| and a plurality of smaller slitting members 232 spaced apart one from. another. -Such member produces upon a bag with a folded-over end the effect illustrated in Figure 16, in which 233 is the clinching staple, 234 is the long slit and 235 are the short slits. The end of such a bag may be readily torn from the body thereof for the purpose of opening, the long slit 234 providing means for hanging the bag.

In Figure 17, another form of slitter and a complemental anvil are illustrated.- In such form of slitter, there are two penetrating sections 240 and 24|, one at substantially a right angle to the other. -In the anvil complement-al thereto there are two slitting edges' 242 and 243, one transverse of the base and the other longitudinally thereof.

When such slitter and anvil are employed, a result such as is illustrated in Figure 18 is obtained. In said figure 244 indicates a bag having in back thereof al turned under section, 245 is a staple securing the turned-overv section against the body of the bag, and 246 is the T- shaped slit which is obtained by the use of the slitter and anvil shown in Figure 17.

` Figures 26, 27 and 28 illustrate new types of staples and Figures 29, 3Q and 31 show in crosssection-discharge chutes suited for use therewith with a staple of each of the types mentioned. The staples disclosed in Figs. 26, 27, and

' `28, form a part of a divisional application Serial No. 39,247, led September 5, 1935, by William G."Pankonin, for Staple and staple-strips. Each staple has its bridge portion' formed laterally to Y correspond with the shape of the discharge chute. There may be a slight 'difference between the shape of the staples and the shape of' the dissided stapleor any other shape used other than the shape of the'chute, it will be cut into pieces by thedriving tool which corresponds in shape.

to the chute. The staple thus would be made useless. v'I'he staples A, B, and C shown -in Figures 26, 27, and 28 are cemented together in the usual manner. It will be noted that by forming the bridge portion as above described the effective width, i. e. total space contained between two parallel planes touching the' outermost 'side surfaces lof the bridge portion, is increased without materially'increasing the amount of material in the staple. This provides for a more stable engagement between the driving tool and the bridgerof the staple aiding in maintaining the legs in vertical alinement with the driving .tool during the driving .,operation. Further, the lat- 'eral interfitting of the staples aids in preventing `misalinement lwhen' assembledinto strip forma' tion.

To form the modincation of the ejection chutes as shown in Figs. 29 to 31, inclusive, the slitting mechanism illustrated at 2|2, 2|! in Fig. 1 is omitted from the front wall 8| of the U-shaped 'housing 80. The front section 0| of (Figs. 1,2, and 3) is then formed with a centrally located, vertically extending, V-shaped forwardly faced indentation (see Fig. 29) extending from the bottom o f the section 8| to a point opposite the bottom of the plunger |00 when the latter is in its vraised position. The front edge of the strip 66 is provided with a V-shaped projection (see Fig. 29) complementl to and spaced from the indentation formed in section 0|, the spacing being substantially equal to the thickness of the bridge of staples for which the machine is designed.' A'similar complemental projection in vertical alinement with the projection in the strip G6 is formed and extensive of the tongue 65 at the front of the channel mem- .ber 00. The staple driving tool |02 is provided vwith a vertically extending centrally located V- shaped indentation and projection compiemental to the projections and indentation above referred to. 'I'his extends from point on the driver'adjacent the bottom of the plunger |00. To form the structure shown in Fig, 30 substantially the Asaine modication of theA structure described with respect to Fig 29 land appliedto the partsshown in Figs. 1, 2, and

3 is followed. In place of'al single V-shaped indentation there are three indentations, the cen--l tral indentation facing rearwardly and the symmetrically positioned side indentation facing forwardly. It should be. noted that in addition to the lc/hanges noted above, it is necessary to extend thefcentrally positioned and rearwardly facing indentation in the driving tool |02 up- I wardly from the bottom edge of the'plunger to a point distant therefrom equal to the distance of travel of the plunger during a complete down stroke. In connection-with the above, theforward wall |0| of the plunger |00 is likewise ,formed with a centrally positioned eand rearwardly facing indentation' coextensive and corriplernentalJ with that formed lin the driving-tool ,|02 above the, bottom of the plunger.- This is necessary to provide clearances between' plunger tool' and housing.l In forming thamodiiication shown in Fig. 31, the front wall section 0|.has to one side 'of its vertical center line a forwardly faced indentation'and symmetrically positioned non the other side of the verticalcenter line a rearwardly faced indentation. The indentations are formed to the same extent-as that described in relation .to Figs. 29 and 30. Likewise the front` end of .the strip 66 and the tongue 05 are provided with a projection and an indentation in proper spaced alinement and complemental with the respective indentations in -thewall 3L indentation in-'alinement with the indentation respect to the structure of. Fig. 30, the forward wall of the plunger I0| has an-indentation coextensive. and complemental ,with the, rearwardly facing indentation formed in the driving tool |02, it being remembered that with respect to the rearwardly facing `indentation it must extend .vertically from the driving edge of the. tool to a point above the bottom edge of the plungerequall to the length of the down stroke of the plunger.

When a staple having its bridge formed latthe housing 29). Such projection the driving edge to the 'as they are .deformed to shown in full In addition, the forwardend of the angell' is provided with an Y Vbent downwardly into in tongue 65 and strip 36. .'As described".with

hase m and being larged'end 3|0 of section 308.

','mounted on base 300,

erally to conform with the indentations and projections of any of the modifications shown in Figs. 29 to {i1-inclusive is being driven, any tendency of the metal comprising the legs to flow into the metal comprising the bridge without buckling the bridge. This is because the compressive forces set up in the bridge will occur, due to the lateral deformations, atpoints more closely spaced than in the case of a straight bridge of a staple having its legs similarly spaced. Hence the tendency to buckle is lessened. Morecver,

the interiittng of the lateral deformations on` the bridge ofa the staple with the indentations of the discharge chute will effectively; by reason` of friction therebetween. preventthe central portion of the bridge from 'bending downwardly in advance of the driving tool during the driving ac- `tion.

Staple A comprises a bridge having an offset projection which extends forwardly (see Figure may be at the center or at one side .of the center. The-*staple may be of bent wire or it may be stamped from` sheet material.

In staple B the bridge jections thereon and it is fdesigned for u'se a chute like that shown in Figure 30.

Staple C has two projections, one forwardly has a number of p ro'- extending and the other rearwardly extending.'

Such -staple is reversible in` the machine (Figure 31); that is, strips may be fed in with either end of the strip rst. I

Figures 35 and 36V illustrate a new combination of anvils. Base 300 has'thereon a permanent anvil 30|. The clenching seats in anvil 30| may be for bending the legsof the staple inwardly. 'I'he base 300 has slots 302 and 303 therein. The rear wall 304 of anvil30| preferably is sloping as shown. Y Y v A sliding member or anvil 305 is mounted on base 300. Member 305 at its front end has clenching seats 306. vThese are disposed at the edges of the member 305 and legs of a staple; The seats 306 are short and the ends of the legs of' a staple ride out of the seats portions of the staple legs which rest inv suclr seats at the termination of the clenching operation; .The bottoms of seats 306 are offset from the adjacent material of rigid anvil 30| so as not to interfere with the clenching operation and to control the shape of the staple. A clenched staple in seats. 306 has'its legs projecting well beyond the lateral edges of member 305. y

Member 305 has 'atone side (or both, if preferred) a finger piece 301 which facilitates movement of the member longitudinally of the base 300. `Finger piece 3 01 also assists in lifting the member or anvil 305 from its inoperative position linesv in Figure 36 to its'operative position shown in dotted lines in the same figure. A T-shaped section 308 of material of the member 305 is cut from the body thereof and base 300, aspring 300 encircles the'upper part of section 300, engaging the "under surface of held in position by the en- At the rear end of member- 305 3|| which projects Adownwardly into slot 304 to v*limit forward and backward movement -of member 305. Forward movement of member 305 positions clenching'seats 306 in registry with the staple discharge chute of a staple driving head but not shown'in Figures will be prevented are vadapted to spread the' make room for the upper the slot 302. Beneath the an extension A 35 and 36.. generally indicated at 3|3, the member 305 may be provided with a projection selectively iitable into la plurality of recesses formed in the top of base 300 for the purpose of maintaining the member 305 in either its operative or inoperative positions. The spring 309 holds the member 305 resiliently upon base 300 permitting the member 305'to ride away from the recesses and upwardly upon and over the rear wall304 of anvil 30| to render anvil'30l inoperative while making movable anvil 305 eiIective.

What I claim is new and desire to secure by Letters Patent of the United States is: 1, Ina stapling machine, a base, a iixed anvil in said basei'a second anvil 1pivoted transversely of said base for movement into and4 out of operative position, and a spring-disposed longitudinally of the base and engaging the second anvil to maintain it in and out of operative position.

2. A stapling machine comprising a base, a beam magazine, a transverse member .for pivoting saidmagazin'e to said base, and a iiat spring intermediate said base and beam, said'spring intermediate its endsbeing` biased by said transverse member and having its ends normally resting against said base, and means providing a lost motion connection between one end of said spring-and said beam magazine.

3. In a stapling machine, a base, an anvil, a beam magazine, a iiat spring between said base and magazine and disposed longitudinally of the base, a member depending from said beam and engaging said spring, and means on said depending member for adjusting the engagement between said spring and said depending member to vary the distance between said anvil and said beam magazine.

4. A staple magazine for use in a staple machine having a beam magazine, and comprising a channel member, and a strip, .the end of said magazine comprising an angularly disposed section of one of said members, and there being between said members spacing and supporting tongues struck from the material thereof.

5. A staple deforming tool'comprising a deforming member. having a Width approximating that of a staple and a thickness approximating the thickness of the staple,. said tool having a driving end of the width of the staple between the legs thereof, the corners of said tool being removed to allowv the end portions of the bridge portion to seat therein to prevent said bridge 'housing and said guide yhaving portionl from buckling orbending as the legs of the staple Jare driven into material orclinched.

6. In a staple driving machine, a hollow plunger housing, a spring in said housing, and a spring basket between theplunger walls and said spring, said, basketv being coextensive with the plunger walls and movable therewith.

7. A plunger for driving staples and comprising a member having spaced-apart walls forming aV hollow. `shank, a li-shaped 4housing in said shank, a spring within said housing, and a spring Vguide extending upwardly into said plunger and forming an interiprguide for said spring, said relatively movable parts.

i 8, A stapling machine comprlsinga housing having a front wall andl side walls, a plunger in said housing, a removable insert member fitted f between said side walls and forming a rear wall for'said housing, and a pawl resiliently carried intertting andf a plunger in said housing, an insert member in said housing, and a full stroke mechanism mounted on said insert member, said plunger and said insert member having opposed complemental oiset sections providing a plunger stop device.

11. A stapling machinecomprising a housing, a magazine spring, a support for said spring comprising an H-shaped member, said spring being coiled about the cross bar in said member, means in said housing for holding the lower end of said H-shaped member, and a shoulder in said means to receive the other end of said H-shaped member to prevent its rotation in a direction uncoiling saidA spring.

12. A stapling machine comprising a U-shaped housing, a plunger in said housing, an insert member arranged transversely of said housing, a locking bar extending through said insert member and the side members of said U-shaped housing, and a cover for the open side -of said housing and having fastening means extending into said cross bar.

13. In a stapling machine, a base, an anvil, a beam magazine movably mounted upon said base, a fiat spring intermediate said base and beam to elevate said beam magazine to a predetermined angular spaced relation to said anvil, and adjustment means cooperating with said spring to vary the predetermined angle between said anvil and said beam magazine.

14. In a stapling device, a housing having front and side walls', a plunger fixedlypositioned between said Walls and having an oisetv section, and an insert member mounted between said side walls to the rear of said plunger and forming a rear wall for said housing, said member having a complemental oii'set section and co-operating' with the oiiset section of the plunger to form a stop arresting upward movement of said plunger.

l15. In a stapling machine, a beam magazine, a housing, a -spring for moving staples along said magazine, and a mounting member for said spring in said housing and comprising a core about which said spring is coiled and side members acting as side guides forA the spring, said side members being provided with inward projections preventing said spring from uncoiling while permi ting one end of said vspring to pass freely ont o said mounting member.

16.- In a stapling machine of the type speciedf a magazine for staples consisting of a channel member having an upturned end and a strip supported within said channel-'member and'spaced from the sides thereof, a housing Aon one end of said magazine and defining with said upturned end van ejectionchute for staples, said strip and `Said-channel member providing 'a guiding and housing for said mechanism positioned on said yse;

' spring means for feeding staples to said driving-- .i mechanism including 'a plunger, a housing for,

`anism including a 'hollow forwardwall of said channel member, said housing extending to the bottom of said channel member, and means securing said housing to above the bottom level of staples therein, said means consisting of double shanked'rivets having their shanked ends attened flush with--the inner surface of said channelmember.

18. In a stapling machine, staple driving mech; plunger having sides,A a housing for said plunger having walls adjacent said sides, said walls intermediate the top and bottom thereof having outwardly formed portions of V-shaped c oss section providing a seat forsteel balls, said sides having inwardly formed portions of V-shaped cross section providing a guide, and steel balls insaid seat, said guide slidably contacting said balls whereby said plunger is guided for v rtical movement withinn said housing.

19. InY a staplingmachine, means for staples comprising a housing.' an ejection chute vfor staples, a plunger reciprocal in saidhousing and slidably supported at a staple driving blade having a portion adjacent the front of said plunger and spaced from the housing and an extended portion operable. in said ejection chute, means for securing said blade to said plunger to allow slight lateral movement therebetween, said mean comprising rigid fastening means between the upper end of said blade and said plungerV and a slidably intcrfitting stud and recess connection between the intermediate portion of said blade and said plunger, said intertting studand recess means permitting relative lateral movement between said blade and plunger while preventing relative vertical movement therebetween.

20. -In a stapling machine, staple driving mechanism including a plunger, a housing for said mechanism comprising a front wall and side walls, said plunger beingoperable betweensaid walls, an insert memberpositioned between said side walls and providing a rear wall for said housing, and a transverse loc g bar extending through said side walls and insert member to hold the latter in rigid position within said housing.

21. I anism' mecha walls, said plunger being operable between said walls, said side formed thereon, an insert member positioned between said side `walls forward of said projections and resting thereagainst, said member providing areas wall for said housing, and a transverse locking `bar extending `through said `side .walls and said insert member, said bar and said projections maintaining said insert in accurate and a stapling'machine, staple driving mechcludinga plunger, a housing for said .fixed position within said housing.

22. In a stapling machine, staple driving mechanism including a plunger, a housing for said mechanism comprising a front wall and side walls. said plunger 'being operable betweenA said walls,

mechanism, and an insert member positioned between said side walls to 'the rear of said plunger, said member being provided with a rearwardly opening notchedstructure for holding said spring means within said `side-walls.

23. In a stapling machine, staple driving said mechanism. comprising a front wall and side channel member, staple driving mechanism, a

said magazine at a point driving the sides thereof and 'sm comprising, a front -wall 'and side` walls having inward projections.

` carried by said arm, said walls, an insert member positioned bet'ween said side walls to the rear of said plunger, spring means for feeding staples to said driving'mechanism positioned between said side walls to 'the rear of said insert member, a transverse locking bar extending through said side walls 'and'said insert member to rigidly secure said member in position, a cover plate resting on the rear edge of said side walls, and fastening means for said cover plate acting upon said bar to hold it from transverse displacement. l

24. In a stapling machine, staple driving mech# anism, a housing for said mechanism, a staple magazine, means for advancing staples through said magazine to said driving mechanism comprising a member having elongated side portions and an intermediate connecting portion, a spring coiled about'said connecting portion and having one end extending out from the coiled portion, a.

staple follower attached to the free end of said walls, said plunger being operable between said spring, and interconnecting means between said y side portions and said housing for releasably securing said member within said housing, the tension in the coiled portion of said spring coacting with said interconnecting means to hold said member in position.

' 25. In a stapling machine, staple driving mechanism, a housing for` said mechanism, a staple magazine, means for advancing staples throughsaid magazine to said driving mechanism'comprising a member having elongated side portions and an intermediate connecting portion, a spring coiled about said connecting portion and having.

one end extending out from the coiled portion, a staple follower attached to the freeend of said spring, interconnecting means between said side portions and said housing for releasably securing said member within said housing, said side portions having projections on the inner edges'thereof positioned to engage the outer coil of said spring to prevent said spring from uncoiling beyond a predetermined limit when tension is removed from said free end.

26. In a stapling machine, staple driving mechanism, a housing for said mechanism, a staple magazine, means vfor advancing staples through said magazine to' said driving mechanism comprisinga member having elongated side portions land an intermediate connecting portion, a spring coiled about said connecting portion and having one end extending out from the coiled portion, a

staple follower attached to the free end of said spring, interconnecting means between said side portions and said'housing for releasably securing said member within .said housing', said connecting portion having a slot therein, the inner end of said spring tting in said slot, and a mem er within: said slot to anchor said inner end f said spring, said spreader member having 'varies lnormal to Asaid connection portion and forming therewith a coiling bar for said spring. 27. In a combined stapling machine and slitting device, a base, an anvil on said base having staple deforming means, a-staple carrying arm' pivoted to said base, staple driving mechanism arm being movable tospreader ward saidbase during a staple driving operation,

a slitting tool adjustably carried by said arm, said l tool having a V-"shaped cutting edge, said anvil having a. cutting edge in alinement with the cutting edge of said tool and cooper-able therewith as said arm is moved toward said base as the staple driving mechanism is operated, and adjustment means between saidtool and said arm to regu1ate the length of the cut rbduced by said tool when cooperating with said anvil. y

28. In a stapling machine, a base having an ing said shftable anvil to permit it to be shifted bridge of the staples, said tool having the cornersV to a position overlying and supported on`V said iixed anvil to render the iixed. anvil inoperative and the shftable anvil operative, said means permitting said shftable anvil to be .moved rearwardly and downwardlyof said 'xed anvil to a position resting upon said surface to render said fixed anvil operative and said shftable -anvil inoperative.

29. In a stapling machine, aLbase having an upper surface, staple driving Amechanism associated with said base, a xed anvil positioned on said surface and having staple deforming cavities in alinement with said mechanism, spaced extensions on said xed anvil, ashiftable anvil having staple dcforming cavities ,ofV different characteristics than those of said xed anvil, andv operable in said chute to drive staples therefrom.

and having a driving edge co-extensive with the of its driving edge removed whereby as said tool contacts the bridge of a staple during the driving action the portion of said bridge immediatelyv overlying the'legs of the staple Awill be wedged in said removed portions of said tool to prevent buckling of said bridge.

31. In a stapling machine, a magazlne'for staples comp sing a channel guide member having I' the cutting edge of inturned ,ilanges on the'side portion thereof, an elongated strip of metal fforming atrack upon which staples ride, said strip being positioned within said member in spaced relation to its bottom, sides, and flanges, and supporting4 tongues between said strip and the bottom of said member to maintain said strip in proper spaced re 'lationship' vto said member;

32. In a stapling machine, a base having an upper surface, staple driving mechanism vassociated with said base, a iixedeanvil positioned on said surface and having staple deforming cavities in alinement with said mechanism, a

tion resting upon said surface to render said fixed' anvil operative and said shftable anvil inoperative.

33. In a stapling machine, a base having an upper surface, staple driving mechanism 'associated with said base, a xed anvil positioned on said surface and having staple deforming cavities in alinement lwith said'mechanism, a shftable anvil mountedon said base having staple deforming cavities of different characteristics thanv those of said fixed anvil, and means for mounting said shftable anvil to Vpermit it to be shifted to a position overlying and supported on said fixedA anvil to render the xed anvil inoperative and the Ashftable anvil operative, said means permitting said shftable anvil to be moved rearwardly and downwardly of said fixed anvil to a position resting upon said surface to render said xed anvil operative and said shftable anvil inoperative, said fixed and shftable anvils each having a raised portion thereon above their normal Yface to increase the distance between material resting thereon to be stapled and'said staple deforming cavities whereby legs of the staples are permitted to be more readily deformed.

'WILLIAM G. PANKoNm.

. -cERI-IFGATE oF CORRECTION. 14 Patent No.- 2,105., 551. v December 28, i957.

WILLIAM- G. PANKONIN'. Y It is hereby certified that error appears inu'the printed specificati: of the above -numbered patent requiring correction as follows: Page l, fir: col-umn,`before line l, insertfthe following paragraph:r I

The present invention has to' do with a staple' driving and clinching machine and its combination with a sl'it'ter.f Novelties reside in the constrnction and in the combination of al member of the parts of the stapling device and of thej slitter.

and that the said Letters Patent should be read with this correction there in that the same may conform tothe record of the case in the Patent Office 'signed and sealed this 22nd day of February, A. D. 1958.,

V `VHenry Van-rsdale,

" (Seal) l Acting Commissioner of Patent:

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