US1169339A - Stapling-machine. - Google Patents

Description

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ARTHUR I-I. MAYNARD, vOF WARWICK, RHODE ISLAND, ASSIGNQRv TO BOSTON WIRE STITCHER COMPANY, 0F PORTLAND, MAINE, A 'CORPORATION OF MAINE,

STAPLING-MACHINE.

To ZZ whom it may concern.' y

Be it known` that I, ARTHUR H. MAYNARD,

a citizen of the United States, residing at lVarwick, in the county of Kent, State of Rhode Island, have invented certain new and useful 'Improvements in Stapling- Machines, of which the following is a specification.

My invention relates to improvements in wire-stitching or stapling-machines for applying staples or like fastening-devices to various articles t0 secure them together or to attach labels or tags thereto.

vMy improvement consists particularly of an auxiliary forming-means 0i' anvil adapt ed to coperate'with the usual clencliermechanism of the machineA in bending and clenching the legs of the staples in place The object-of my improvement is to pre-- vent the' staples from tearing, abrading o'r erated upon, and further to give a neater and more inished appearance tothe work.

My new device is intended for use more particularly on machines for stapling tags onto textile goods or for securing together such articles as hosiery and underwear.

Theinvention is fully described in the following specication, illustrated by the accompanyingdrawings, in which like reference characters designate likefparts,

In the drawingsgiFigure 1 is a front elevation 0f the clenching-mechanism of a usual tvpe of stapling-machine showing my improvement applied thereto and illustrating the parts in position at the commence? ment of the operation of bending and clenching the legs of the staple; Fig. 2, a similar view showing the mechanism at the completion of the operation of clenching the staple; Fig; 3, a vertical, sectional view of the work-support and clencher-plate taken on the line X-X of Fig. l, and showing my improved vforming-anvil applied thereto; Fig. l, a detail view in perspective of the forming-anvil; Figzv, a plan view of the same showing its relation to the clenclierplate; Fig. 6, a View showing the manner in which the staple is clenched through the material to secure a tag thereto; and Fig. 7,

` a similar view, in section, showing a slightly dierent method of bending` and clenching the legs of the staple'.

Referring first to Figs. and 2, the staplingmecla'nism here illustrated is of a Specification of Letters Patent.

llatented Jan. 25, 11916.

Application filed June 30v 1915. Serial No. 37,183.

well-known type common to various styles of machines of the class specified, such, for instance. as that shown in United States Patent N o. 850,290, granted to T. A. Briggs,-

Aprill, 1907. It comprises essentiallythe `main head or bonnet B,`in which is slidably mounted a driver .D for driving the staple S down through the material to be stapled, and a clencher-plate C arranged beiow to adapt it to serve as a support for the work placed underneath the'head. The driver D slides in a slot Z) vin the head B, or in a slotted face-plate attached to the front of vthe head, and is operated from any suitable means such as a bell-crank-lever as illustrated in the patent above referred to, but not here shown or described. l/Vith this type of machine the staples are delivered vtothe machine from a magazine or stick on which they have previously been assembled, but in some instances the staples are formed automaticallv in the machine from a supply of wire fed thereto.

In Order to avoid unnecessary description in the present specification I have here shown' my improvement as applied to a for the material being operatedl upon, and

in other cases, where the stapling is to be done on hosiery or underwear, convex forms are employed for holding the work. As these parts are not essential to the operation of the present improvement, they have y been omitted from the present drawings for the sake of clearness.

Riveted to the front of the plate C is a clencher guide-plate C which is cut away loi` slotted at c, c to form horizontal cam;l

faces c2, c2 disposed'on opposite sides of the staple-receiving throat c. Referring to Fig. 3, the clencher-plate C is supported on an arm F, which projects from the main frame of the machine, not here shown, and is secured in position by the screw f and dowelvpins f', see also Figs. 1 and 2. Projecting from its front face vare two headed-studs f2, f2 which serve as pivots for the clencherarms E, E mounted thereon by means of their slots e, e. These arms have laterally! extending projections e', e which engage recesses g, g of a slide G. The slide Gr is adapted to be reciprocated vertically in relation to the plate C and slides on headed studs gf, only one of which is here shpwn, which engage suitable slots g2. 'The slide G is reciprocated from a going part of the machine which may be operated through a treadle or from any other convenient source of power.

At their upper ends the arms E, E are recessed or cut away on their rear faces, as illustrated by the dotted lines e2, e2, and carry'rearwardly projecting studs or pintles e3, e3. Pivotally mounted on the studs 63, e3 are the rocka'ble and slida'ble clenchers H, H held in position in the slotted portions of the clencher guide-plate C. The clenchers H, H are formed with tail-like extensions h, h which engage the cam-faces 02, cl on the clencher-guide C to rock them about their pivots when the arms E, E are moved together. The arms E, E are oscillated from the upward movement of the slide G and thereby the ends h, h of theclenchers H, H are caused to engage the legs s, s ofthe staple S, after the latter has been driven down throu'f'gh the work W by the driver D, to bend the legs inwardly or toward each other and clenchl them together.

All of the elements described above are of substantially the same construction and arrangement as usually employed in machines of this type, and my improvement is applied to use in connection with this well-known mechanism'as follows: As before stated, my new device consists essentially of an auxiliary forming-anvil which cooperates with the clenchers H, H to bend the legs of the staple into place. "Hereto fore it has been the' practice to clench the legs of the staple into the material without employing any means for holding them at the points Where they are bent. That is to say, the stock or material through which the staple is inserted is depended upon to hold the legs of the staple apart while their -ends are being bent over to be clenched into place. Vith such materials as cardboard, strawboard or stiff paper,1 the stiffness of the stock is generally sufficient to thus hold the legs of the stapler'in place while they are being bent over, bt1t`in stap- 4ling textiles, Iit has been found that the material is not rigid enough to resist the-v pressure on the staples and therefore the material is liable to be torn, abraded, and pulled out of shape or otherwise damaged. In my present improvement I Aprovide against this contingency by employing. a

bending and forming-anvil A adapted to abut the legs of the staple where 4they project from beneath the material and around which the 'ends of the legs may be bent during the clenching operation.- This forming-anvil A may be of any suitable construction and arrangement as best adapted to' the mechanism of the machine to which it is to be applied, the present showing being the preferred embodiment of the device.'

Referring to- Fig. 4, I have here preferred to illustrate the anvil A as constructed in the form of a relatively thin plate, bent rearwardly at its top and then curled over in the hook portion a, which is formed with twoforwardly projecting lingers or prongs a', ai. Referring to Fig. 3, the main or body portion a2 of the anvil isof a width to adapt it to iit snugly into a. vertical slot or *recess c4 formed on the back of the clencher-plate C, and the screw which holds the latter in place also passes through a hole a3 in the anvil. In .this manner the anvil A is secured firmly in place against the arm'F on which the plate C is supported, with the forwardly extending prpngs at', a projecting across the upper edge of the clencher-plate. ring to Figs, land 2, it will be observed that the prongs a', a are seated in the recessed throat c o-f the plate C so that their upper faces come flush with the top of the plate. In this way they are prevented from obstructing the work W while the latter is supported .on and passed across the edge of the plate C. Referring to Figs. 3 and 4L,

Referthe` shoulders a4, a4 at the sides of the prongsv a', a abut the rear face of the plate C at its upper edge and help to support the anvil in position.

The purpose of the hook or goose-neck a at the top of the anvil A is to providefor a slight yielding action or resilient 4Inovement of the operative part vof theanvil. That is to say, this construction adapts 'the prongs a', cz to spring upwardly when acted upon by the clenchers H, H so that they will assume 'their proper vrelation during the clen'ching operation. AThis prevents danger of the prongs being broken off or bent out of place through improper adjustment of the clenchers in relation thereto orv from' variations in the thickness `of the wire of v the staple being operated upon. In addition, the yielding nature of the prongsallows for greater freedom in the release of that the upper faces of the prongs a', a are beveled off at a?, a5 along their outer edges,A

while the under faces of the prongs are ,bev

the clenched staple as the Work is drawn j "out of the machine.v It is also to be noted l the prongs a, al.

happen to strike against the projections a', a, the beveled edges thereof will act to force the legs apart to allow them to slide down past the prongs. That is to say, in driving the staples down through the work, should their `legs accidentally come into contact with the prongs a', a', the latter will. spread them 'apart so that they can' pass by the anvil without obstruction. The purpose of the bevels a, a6 on the under sides of the prongs a, a is to provide for bending or forming the legs of the staple S with hook-like ends s', s as illustrated in Fig. 2. It will be observed from this view of the drawings that the ends vof the clenchers H, H are formed with. angular faces h2, h2, which are brought into position opposite the bevels a6, a6 when the clenchers come together, so that the legs of the staplev S will be b ent upwardly at their ends to form the hooks s, s which are adapted to be clenched into the material WV,

see Figs. 6 and '7 The method of operation of the complete clenching-mechanism, with my improvement applied to use in connection therewith, is as follows: Referring to Figs. 1 and 2, 10 and w represent two thicknesses of material, such, forv instance, as the tops of a pair of hose, and t is a tag to be attached thereto. As the machine starts to operate the head or bonnet B is first brought down into position against the work W to hold the material .in place similarvto the action of a pressure-foot. The driver D is then carried down in its guideway b, to force the staple S, previously fed thereto through the work W with its legs s, s projecting downwardly therefrom into the throat c of the clencherplate C. During this operation, if the legs of the staple are not properly formed ory should they have been accidentally bent together or distorted, the beveled edges of the prongs a', a on the anvil A act as guides to spread them apart in proper relation. The clenching-mechanism next comes into operation to bend over and clench the legs of the staple into position. as follows: Referring to Fig. 1, as the slide Gr starts to move upwardly it rocks the arms E, E together and this brings the ends of the clenchers H, H against the legs of the, staple S to bend the latter toward each other. During this operation the sides of the prongs a, a on the anvil A act to hold the legs of the staple apart at the points where they are being bent, and in this way prevent them from cutting through or tearing the material w, w', or the tag t. As the clenchers H, continue their rocking motion,

their sidev edges are' brought together, as

vshown in Fig.A 2, and meanwhile their ends are carried upwardly to press the legs s, s of the staple S against the under sides of Finally the inclined faces h2, k2 on the yclenchers bend the eX- tremities of the legs s, s against the beveled faces a6, a of the prongs to form the hooked ends s, s. During the stapling operation, the material w, -w is compressed or flattened out somewhat by the pressure of the head or bonnet B. Now, when the bonnet B is raised from the work, the latter can be pulled forward to draw the staple out through the throat c of the-plate C, and the ends of the staple will slide olf from the prongs of the anvil A. Immediately the staple S is thus released from the anvil A, the inherent elasticity of the material w, w, or other stock being operated upon, vwill cause it to'assume its original thickness and the hooked ends s, s will be drawn up into the work\to grip the latter and effect a most secure fastening. Furthermore, the ends of the staple being thus buried or` hooked into the material prevents them from catching in other articles and from pricking or scratching the lingers during handling, besides giving a more lfinished appearance to the work.

In Fig. 7, I have illustrated a slightly dif ferent method of clenching` the staple S through the material consisting in bending the ends of the legs s, s outwardly instead of inwardly or toward each other. IVith this method the forming-anvil A is of substan'v tially the vsame arrangement except that its prongs are positioned farther apart and are beveled at the top on their inside edges and at the bottom on their outer edges.

It will be seen that with my improvement as above described the staples can be driven through the work and their legs clenched in place without danger of tearing or cutting the material. This is especially important 'in applying tags to textile articles since it prevents tearing the relatively thin paste board or paper. and therefore avoids an unsightly appearance or the liability of the tag becoming detached. Moreover with myim- 'proved device the bending and clenching of the le'gs of the staple can be accomplished without danger of tearing or otherwise damaging the material of the articles being operated upon, and in addition a much neater appearance is given to the work.

Various modifications might be made in the form and construction of the parts of my improved device without departing from the spirit or scope of the invention. Y

Therefore, without limiting myself to the exact embodiment shown and described, what-I claim is 1. In a staplinglmachine, the combination with means fory driving the staple through the work, of clencher-means for bending over the legs ofthe staple, and an auxiliary forming-anvil having prongs around which the ends of the legs of the staple are bent by the action of the clencher-means.

2. In a stapling-machine, the combination with the staple driving and-clenching-mech- Y anisms,

l of al resiliently-mounted anvil adapted to` yieldingly coperate with the clenching mechanism to provide for clenching the ends of the legs of the staple thereagainst.

Y 3. In a stapling-machine, the combination with the staple driving and clenching-mechupon to yieldingly resist the pressure of the clenching mechanism during the operationof clenehingA the ends of the legs thereagainst.

4. In a stapling-machine, the combination with means for driving the staple through the Work, of Aan anvil arranged to engage the legs of the staple to force them apart and maintain them in proper relation as they protrude through the material, andclenchermeans for bending the ends of 'the legs of the staple around'the anvil.

5. Ina stapling-machine, the combination With means'for driving the staple through the iWork, of a clenCher-plate arranged below the vWork and formed With a staple-re'- 'ceiving' throat, a forming-anvil having prongs projecting across the throat of theL clencher-plate to engage the legs of the staple projecting through the Work, and

' clencher-Ineans coperating With the anvil to bend the ends of the legs of the` staple around its prongs.

6. In ay stapling-machine, the combination With means for driving the staple through the Work, of an anvil arranged below. the Work and formed With beveled sides adapted to engage the legs of the staple to guide them through thematerialand hold them in position as they protrude therefrom, and

clenchersformed with'inclined faces at their ends arrangedl to -coperate with the beveled edges of the prongs. to bend the ends of the staple against said beveled edges' to form upwardly projecting hooks.-

8. In a stapling-machine, the combination With means for driving 'the staple through the Work, of a yieldinganvil arranged below Athe work to engage the legs of the' staple as they ,protrude vtherefrom, said anvil formed with' a body portion having a curved goose-neck provided atv its end With prongs projecting into position to receive the legs of the staple as they arebent therearou-nd, and clencher-meansfor clenching the ends of the legs against thek under sides of the prongs.

9. An auxiliary Tforming-anvil vfor Vsta-- pling-machines, comprising a vertically arranged plate-member bent rearwardly at its top and vthen forwardly in the vform of a gooseneck With horizontally-disposed prongmembers projecting forwardly therefrom.

In testimony whereof I affix my signature in presence of tWo Witnesses.

ARTHUR MAYNARD.

' Witnesses:

MINNIE BA. LooMrs, HARRY HACKNEY.l

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