US551079A

US551079A - Sachusetts

Info

Publication number: US551079A
Authority: US
Publication date: 1895-12-10
Anticipated expiration: 1912-12-10

Description

(No Model.) W. H. FORGE & M. 0. PARENTEAU.

MACHINERY FOR AND METHOD OF COVERING HEADS 0P vEYELETS.

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UNITED STATES WILLIAM H. FORCE AND MAXIME'O. PARENTEAU, OF SPRINGFIELD,

PATENT OFFICE.

SACHUSETTS, ASSIGNORS -0F ONE1THIRD TO A. DWIGHT CU'IIiE R, OF

SAME PLACE.

MACHINERY FOR AND inion or COVERINGHEADS 0F EYELETS.

SPECIFICATION forming part of Letters Patent No. 551,079, dated December 10, 1895.

Application filed May 6,1896- Serial No. 548,220. (NomodeL) To all whom it may concern.- 1 I Be it known that we, WILLIAM II. FORCE and MAXIME O. PARENTEAU, citizens of the United States, residing at Springfield, Hampden county, State of Massachusetts, have invented a new and useful Improvement in Machinery for and Methods of Covering the Heads-of Eyelets, of which the following is a specification.

Our improvements relate to dies for combining covers of plastic material with the flanged heads of metallic eyelets and for centering and molding the plastic covers thereon, and have for their object the production of an improved eyelet, together with a reduction in the cost of producing the same.

The invention consists in the combination and construction as hereinafter described,and-

more particularly pointed out in the claims. Our inventionis fully illustrated in the accompanyingdrawings, in which- I Figure I isi a side elevation of two dies r'e moved, the upper in half vertical section'and:

' dies and through the combined eyelet and cover. Fig. III is a plan view of the lower die-with a covered eyelet seated therein. Fig. IV is a top plan view of an uncovered eyelet. Fig. V is a side elevation of a covered eyelet, and Fig. VI is a plan view of a plastic blank.

The machinery in common use for combining the covers with eyelets consists of a facedie, which operates upon a strip interposed between it and the flange of an eyelet seated in the back die to forcibly punch out the perimeter of the cover and the mouth of the tube. The flanges ofthe eyelets have to be constructed to withstand the strain of the punching-tool, and the perimeter of the cover and the mouth of the tube, both being left rough from sharp edges of the plastic material, require to be submitted to subsequent finishing processes, greatly enhancing the cost of the product, to obviate all of which we form ourdies, which may properly be called.

molding-dies, as shown in the much-cularged drawings, as follows:

The face-die II consists of a dependent cone 1', a concentric concavity m atthebase of the cone, which concavity is in contour a reverse counterpart of the top of thee-over h to be molded, and an annular concentric rim or face 0 outside of the cavity m and adapted to make a tight joint with a face of the back die. The plastic material, such as celluloid, which is softened by heat and made in the form of awasher u, with its hole approximately the diameter of the mouth of tube a of the eyelet, and its thickness and larger diameter'proportioned to provide the requisite stock for just supplying the cover, is laid over the-flange b of tube a, raised above the face of back die D, as shown in- Fig. l, and when so laid is molded by the descent of the heated face-die H to form, with slight pressure, a cover to the eyelet without a rough edge upon any of its parts, and having a polished surface:

As will be seen, the cone 2' centers the washer first, rendering unnecessary the performance of this operation manually, and then closes the mouth of the tube, while the'rim o rests upon the face of the back die to thus form amold, completely inclosing, all of flange byand one which the v mouth or countersink 8 around the 'openingfor receiving the eyelet in die D of larger diameter thanwasher u and of a depth just suiiicient to bring the upper surface'of the washer, when resting on the flange of an eyelet, as shown in Fig. I, flush with the face of die D, as said mouth enables a number of washers to be carelessly swept by hand over the plate containing a number of back dies to feed the washers to the dies, those not finding lodgement in the mouths resting upon a flush surface, from which they are brushed.

The finished eyelet (shown in Fig. II in sec tion and in Fig. V in elevation) forms the sub- ;jectmatter of an application, Serial No. 5A5, 876, now pending before the Patent Ofiice, and so forms no part of the invention herein claimed.

Now, having described our invention, what we claim is- 1. The method of covering the heads of eyelets with plastic material, which consist-s in forming the metallic eyelets and forming plastic washers from which the covers are to be made separately, then inserting a metallic eyelet in a hole in a die, and the washer in a recess in said die around the mouth of the hole, then centering the washer with the metallic eyelet by passing a conical die through said washer and into the eyelet from above, and simultaneously molding the washer and fixing it to the eyelet by means of heat trans mitted by the (lie, all substantially as described.

2. The method of covering the heads of eyelets with plastic material, which consists in forming metallic eyelets and plastic washers separately, assembling the eyelet and washer with the washer in contact with flange or rim of the opening of the female die, and of such size as to leave a space around said cone for the body of the eyelet when the dies are closed, a concavity around the base of the cone, and an annular concentric rim surrounding this concavity adapted to fit the recess in the female die, all combined substantially as de- V v scribed.

41. The pair of dies for molding heads on eyelets, the male die having a conical end projection and a cylindrical shoulder surrounding and concentric with this projection, and the female die having a chamber to receive the conical projection and larger than the greatest diameter thereof, and a recess around the mouth of said chamber to receive and fit the cylindrical part of the male die, all combined substantially as described.

' W.- H. FORCE.

M. 0. PARENTEAU.

Witnesses: v

R. F. HYDE, JASON PERKINS.