US1119093A - Portable stapling-machine. - Google Patents

Description

I A. H. MAYNARD.

PORTABLE STAPLING MACHINE.

APPLICATION FILED JAN. 26, 1914.

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A. H. MAYNARD. PORTABLE STAPLING MACHINE. APPLICATION FILED JAN.26,1914.

Patented Dec 1, 1914.

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PORTABLE STAPLING-MACHINE.

Specification of Letters Patent.

Patented Dec. 1, rare.

Application filed January 26, 1914. Serial No. 814,337.

To. all whom it may concern:

Be it known that I, ARTHUR H. NlAYNARD, a citizen of the United States, residing at Chepiwanoxet, town of Warwick, in the county of Kent and State of Rhode Island, have invented certain new and useful Improvements in Portable Stapling-Machines, of which the following is a specification. My invention relates to improvements in stapling machines, so-called, of the portable, manually operable type, and it consists in certain novel construction and combination of parts, hereinafter set forth and claimed. Among the objects sought to be obtained is to provide a stapling-machine of simplithe following advantages: The machine is practically automatic, in that in use the action of the several devices or instrumentalities thereof follow one another in a regular order or sequence; the machine is both easily and accurately operable, and comparatii'ely inexpensive to the staples are not liable to become clogged therein, resulting in imperfect work; the driving-plunger is reversible; the

clenching dies are interchangeable as well as reversible; they are adapted to be readily removed from the die-holder'and replaced therein, first simply pressing the anvil rearwardly, in fact upon pressing the face of the anvil endwise past the holder the dies and holder or frame may be easily removed bodily, and having the back stationary plate of the swinging arm arranged to automatically guide and deflect the staples singly into the channel-way in which the driving plunger is mounted. The machine is arranged to accurately secure a plurality of sheets or folios together; and may be termed a desk-stapling machine.

In the accompanying two sheets of drawings, Figure 1 is a front side elevation of my improved stapling machine in its normally inactive up-stroke position, a portion being in section. Fig. 2 is a corresponding top plan view. Fig. 3 isa corresponding front end view, viewed from the right of Fig. 1. Fig. 4 is a vertical central sectional view, taken substantially on line 4-4: of Fig- 3. Fig. 5 is a front end view, in enlarged scale, showing portions broken away; the stapledriving and work-holding means moving downward and in engagement supported on the table. .Fig. 6 is a similar view, showing with the work.

the relation of the parts at the termination of the down-stroke. Fig 7 1s a horizontal section, taken on line 7-7 of Fig. 4, showing portions of the driving head. Fig. 8 is a corresponding section, taken on line 8-8 of Fig. 4. Fig. 9 is a horizontal section on line 9-9 of Fig. 4, showing the relation of the clenching-dies and holder to the front end of the base. and Fig. 10 is a front elevation of the relatively stationary staple positioning plate, the adjacent elements or parts being omitted.

I would state in advance that certain elements of the present machine that are embodied therein are represented in Thomas A. Briggs ll. S. Patents Nos. 836,662 and 850,290. I. make no claim herewith to such patented features.

The following is a more detailed description of my improved manually operable stapling-machine. including the manner of its operation:

The improved stapling-machine as a whole is indicated by the letter A. It is provided with an elongated cast metal base or body part at having a plurality of nonmetallic plugs a of leather, felt, cork, or other analogous material, let into its bottom surface. The front end portion of the base has a work-supporting table movably fitted therein; the table proper comprises a flat, horizontal member Z) arranged above the upper the table is secured athin vertically movable, apertured front plate b rigidly conto swing on the upper the latter are flattened, to receive the slotted openings p of the dies to permit the removal of the latter; the upper edges 0 of the dies are grooved longitudinally and register with the legs of the staples. As thus constructed and arranged the dies or clencher members 0, when the machine is in the normal upstroke position, are. also in the elevated position, the upper edges 0 then converging downwardly at an angle toward the center of the machine. as clearly indicated in Fig. 5. The under or dia- ODE ISLAND, ASSIGNOR- TO BOSTON DE ISLAND, A CORPORATION OF MAINE.

face of the base; to the back edge of with each other and have a naralike; they are oppositely armetrically opposed sides 0 of the clenchers bear directly upon the anvil m of the anvilbar f seated in the base a. The anvil-bar (shown in Fig. 4) is removable in case of renewal or repair, through the enlarged alining apertures (2 formed in the said plates 6 b or clenching-die holder. A spring f pressing against the inner end of the bar f serves, in cooperation with the fixed pin 7, to maintain the proper relation of the parts. The dies 0 are freely movable on the pins 79 and engage the anvil m as before stated. In order to remove the dies and holder the anvil is pressed rearwardly until its front end is at the back of plate 6 after which the dies and holder may be moved bodily upward from the base.

To the back end of the base a is hinged, at a the upper jaw or arm B provided with staple-carrying and staple-driving devices, the said member B automatically swinging to its elevated or normal up-stroke position by means of a light expansion spring 8 To the side of the arm B is mounted an endwise slidable push-rod it having its back end portion 71. bent downward at an angle and extending freely through a slotted hole formed in the upper wall of the base and into a centrally arranged horizontal combined tripper and actuator-bar r, capable of limited endwise movement; the front end of said bar is beveled transversely and forms a cam face 1' engageable with the clenchingdie holder; the upper edge of the cam 1s also cut away to produce a flat seat r (F ig,

4) arranged to temporarily support the work on the table I) and holder while the legs of the staple are being forced downward through the work. See also Fig. 5. The lower part of the bar at the termination of the cam face 1 extends therefrom in front and forms a stop r for limiting the movement downward of the holder. and its table when the staples are being clenched by the upwardly swinging dies 0. See corresponding position Fig. 6.

The driving-head D is slidably mounted for independent vertical movement on the front endof the member B and is also movable bodily with it. The driving-head and clenching-means are in alinement, the driving-head being connected to the swinging member B by means of a bent retracting spring 8 whose tension exceeds thatof said spring 3 The driving-head consists of the manually operable handle or'pusher e, a Work engaging or clamping plunger ihaving upper and lower slotted opening 0, 0 therein; a thin steel blade n, constituting the staple drivingplunger proper, is attached centrally to the handle member 6 by a screw n tapped into its front wall and extending through the opening 0 of the work clamping plunger 71 and fits a hole therefor in the driving plunger n. See Fig. 4.

The front end of the upper arm B has an opening t therein in register or alinement with the end of a previously charged stapleholder or hollow core C in or on which a column of wire-staples 25 arranged to be fed or discharged singly therefrom are closely packed sidewise; the holder is de tachably connected to the member B. The forward end of the core engages the central back portionu of the relatively stationary 75 plate 14 secured to the arm; Fig. 10 represents the front face of the plate, minus the core; said Fig. 10 also shows a staple normally positioned on the central tongue part u by the action of the spring-like connec- 30 tion t and follower F. It will be apparent that as the staple slides from the tongue u into the guideway of the driving plunger to be engaged by driver 1?. the action of the uniformly pressing connection 6 causes the 5 next succeeding staple to slide from the core to replace the former staple; the lastfed staple, however, is prevented from immediately entering the guideway owing to the presence of the then depressed driver a. The said container or core C is substantially like the staple-magazine disclosed in said Patent No. 836,662, hereinbefore referred to.

It is assumed that the machine is stopped in its idle or upstroke position, the several members thereof havin been properly assembled, that is the stap e-charged container or core C is detachably connected to the machine, and further assuming that a wiresta'ple t has been released from the interposed relatively stationary staple positioning plate to, communicating with the column of staples, into the guide-way of the drivingplunger n, the plunger being at the end of its upward stroke and above the head of the staple. Meanwhile the uniformly pressing resilient connection t causes the follower 25 thereof to press the staples slidably along the core, thus insuring that the said plate at is kept charged with a staple at all times.

Now, upon placing the sheets or work w upon the fiat table b, the latter including the clenching-dies a 0, then being in the normally locked upward position, substantially as shown in Figs. 1, 3, and 4, the operation may be described as follows: Upon pressing downward somewhat sharply upon the slidable handle or post 6 of the driving-head D the initial action causes the arm B to swing downwardly against the tension of springs s s; the back of the thin, steel driving plunger 1g, meanwhile impinging against the face of the back plate 'u, thereby holding the staples stationary in temporary check until the return up-stroke; the continued down- '12:

ward movement of the arm B causes the lower end of the work-engaging plunger i (fixed to the arm) to forcibly engage the proximate or upper surface -of the work,

while at the same time a further downward relatively stationary base member positlored in said base,

mimosa movement of the. driving-head forces the legs of the staple into and practically through-the work (see Fig. 5; the member 6 being omitted), at this instant the cam surface 9 formed on the lower end of member 0 (see Fig. 1) engages the corresponding surface 9 of the push-rod h and forces the latter endwise rearwardly, thereby retract-- ing the actuator-bar r and withdrawing its supporting shoulder r from the vertically guided holder carrying the clenching-dies. The continued movement of the parts in making the downward stroke retracts the bar 1' to its limit, while at the same time the descending plunger '5 causes the dies, 0, mounted in the correspondingly moving apertured holder 1) 12 to forcibly engage the stationary anvil m, thereby turning them on the respective pivots p, and clenching the legs of the staple against the underside of the work w, the die-holder then being supported by the extension or abutment 7- of the bar a"; the corresponding parts then appearing substantially as represented in Fig.

6, thus completing the operation.v

Upon the return or up-stroke, the downward pressure then being released from the handle 6 of the driving-head D, the spring .9 causes the arm B to swing upwardly to its limit, said action at the same time disengaging the cam surfaces 9 and g from each other, thereby releasing or unlocking the rod h, at which instant the pressure of the confined spring a forces the actuator-bar 9" endwise toward the front of the machine and causes its beveled end 1' to elevate the clenchingdie holder to its normal limit or until seated on the shouldered portion 0*, the relative position of the parts then appearing substantially as represented in Fig. 4. At the instant the lower end of the upwardly moving driver 1; passes the head of the staple 15 positioned on the back plate 10, the continuous forward-pressure on the column of staples causes the staple to slide from the plate into the guideway of the driving plunger n, the two parallel narrow grooves u", beveled from the back of the plate downward toward the front, also serving to engage the legs of the staple and further insuring its proper entrance into the'guideway.

t may be observed that for the sake of clearness the action of the parts have been described as occurring in a step-by-step manner. In fact, however, the action of the several instrumentalities or devices are efi'ected by a single, quick, downward movement, the result being effected in the order or sequence substantially as stated.

I claim as my invention:

1. In a stapling-machine of the general character described, the combination of a element, an anvil a guided work supporting table, clenching-dies operdriver to force the legs of the positioned staple downward through the work and in cooperation with the clenching-dies to bend the said legs to engage with the under surface of the work.

2. In aportable self-contained automatic stapling-machine, the combination with a stationary base, an endwise movable actuator-bar mounted in the base and having its forward end'portion constituting a support, a-normally stationary anvilmember also positioned in the base, a die holder vertically slidable in ways formed in said base, said holder-arranged to be locked in position by means of the actuator-bar, and a air of oppositely facing: clenching-dies pivotally mounted in the holder and engageable with the anvil,\ofan upper arm or jaw member hinged to said base, a spring-pressed driving-head slidably mounted on the free end of the arm, staple-feeding means carried by said arm arranged to feed and position the staples singly in the driving-head, and means controlled by the said driving-head for retracting the actuator-bar from the diehol'der, the arrangement being such that, after driving the legs of the staple through the work, a further depressionof the driving-head will cause the dies engaging the stationary anvil to swing and fully clench the legs of the said staple to the underside of the supported work or material.

3. In a stapling-machine, a base member, a spring-pressed upper arm member hinged to the base member, the 'said members constituting the main frame or body part of the machine, the said arm being provided with instrumentalities for feeding, positioning and inserting the staples, the combination therewith of adie-holder movable in said base member, a pair of clenching-dies pivoted in the holder and capable of independent movement therein while the holder is in action, an anvil positioned in said base and means actuated and controlled by the arm for causing the clenching of the prongs of the positioned staple by the conjoint action of the said anvil, die holder and dies.

4:. In a stapling-machine, the combinae tion of instrumentalities arranged to feed and position staples singly therein, a vertically slidable transversely apertured holder tion of a base, an anvil positioned in the base, its longitudinal axis being substantially parallel with the upper face of the base, a vertically guided movable die-holder mounted in the front end of the base, said holder having a table or support secured at an angle therewith and bodily movable with it, a pair of clenching-dies pivotally mounted in said holder, said dies being in engagement with the anvil, means for elevating the holder and its attached members and locking them in the elevated position, and means for releasing or unlocking the holder and returning it to the lower position.

6. In a stapling-machine,-the combination of a base, an operating arm hinged to the base, a spring-retracted driving-head slidable on the outer end of the operating arm, a thin staple-positioning plate secured to the face of said arm, a reservoir adapted to hold a column of closely packed staples carried by the arm, said positioning plate registering with the reservoir and adapted to receive the staples singly thereon, a driving plunger secured to the driving-head, a clamping plunger secured to the front end of said operating arm, the last-named plunger provided-with a staple-receiving groove or channel in which the driving-plunger is movably mounted and arranged to engage the head of the staple and force the latter downward from the channel, and means for ing plate, having an inverted T-shape, provided with a central tongue portion arranged to receive and support a staple thereon and having an inclined groove formed at the base of each of the tongues vertical edges constructed to deflect the staple therefromjand a spring-pressed staple-carrying core or magazine detachably connected to said arm, the front end of the core being in register with the said tongue portion of the positioning-plate.

In testimony whereof I have affixed my signature in presence of two witnesses.

GEORGE A. LooMIs, GEO. H. REMINGTON,

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