US85028A - Improved machine for trimming-welted seams - Google Patents

Description

WLLIAM H. ROUNDS,OF NORTH BR'DGEVVATER, MASSACHUSETTS.

Letters Patent No. 85,028, dated December 15, 1868.`

IMPROVED MACHINE FOR TRIMMING-WELTED SEAMS.

The Schedule referred to in these Letters Patent and making part of. tho name.

To all whom it may concern:

Be it known that LWILMAM H.Rou1vns, of North Bridgewater, in the county of Plymouth, and State of Massachusetts, have invented an Improved Machine for Trinnning Welted Seains; and I do hereby declare that the following, taken iu connection with the drawings which accompany and form part of this specification, is a description of my invention, sufficientto enable those skilled in the art to practise it.

In sewing up boot-legs, it is common to stitch a weltstrip in between the edges, the two pieces of leather being laid face to face, and aiter a leg is stitched, the pieces are flattened out at the. seam, the outer edge of the three thicknesses being trimmed and rubbed down, and the opposite projecting edge of the welt being alsol trimmed closely down to the face of the leather.

It requires a very skilful use of the knife to trim these edges accurately, without injury to the stitches or to the stock; and the object of our inventionhas been to solconstruct a feeding and cutting mechanism that the trimming of' such and similarstitched welts should be automatically and accurately effected by mechanism.

My invention consists primarily in combining, with a feed-mechanism, a forked cutter, which should receive the welt or welted edge between its prongs, and trim ott' the edge thereof, as the stock is fed through the machine.

It also consists in combining an upper and a lower cutter of this description, so as to trim both edges of the welt at one operation.

Also, in combining, with such cutters, finishing-rolls, that shall press and smooth the trimmed edges.

The drawings represent a mechanism embodying myinvention.

A shows a side elevation ofthe machine.

B is a plan of the same.

C is a. front-end elevation.

a denotes a base-plate; l1, a standard or head, in which are bearing for supporting the journals of a feed-roll, c, driven by suitable power; said feed-roll being shown as geared to a ch'iving-shaft, d, by gears This feed-roll is grooved, to admit the outer edge ofthe weltcd leather; and just below the roll is a cutter, g, having on each side of ita prong, h., the shank of the prongs and cutter being fastened to a long lever, v1', hung on a fnlcrnm, k, the rear end of the lever being borne dowli by a spring or weight, the stress ot' which presses the cutter and prongs'up towards the leed-wheel, or against the stock introduced between the wheel and the cutter.

Above the said cutter and prongs, isanother cutter, l, projecting into thc grom'e of the roll c, this cutter being on the end of a shank, in, and having prongs n 11 projecting forward from the sides ofit.

' The cutter l is for trimming the outer edge of the welt, that is to say, the edge which comes inside the leg when finished, and the edge of the stock on each side thereof', and the cutter g is for cutting off the lopposite or wide edge thereof, which lies between the two main pieces of stock.

In introducing the welted edge 'to be trimmed, the prongs 'of the upper'cutter are fmade to straddle the upper or narrow edge of the welt and the adjacent edges of `the stock, the three edges being pressed up against the teeth of the feed-wheel by the prongs h ofthe cutter g, and the main piece of stock below the seam', on cach side ofthe welt, is passed down outside of the prongs below, the wide edge of the welt dropping between the prongs In n, and in front 'of the cut- -ter l, as shown in section at D.

When the feed-roll is rotated in the direction ofthe arrow, the stock will be fed under the roll, the prongs acting as guides, and keeping the two edges of the welt in the vertical plane ofthe centre ofthe two cutters, the cutters trimming .off the two edges of the welt, and the narrow edges of the stock projecting beyond the scam as the stock is fed up to and by them,

the stock being held up to the action of the feed-roll,

so as to insm'e -its progrcssion, by the spring or weight, at the outer end o f the lever l, or by a treadle connected with said end 0f the lever.

lVhen the welted seam has been fed through, the

1fork l may be thrown down from the feed-wheel, by

means of a lever, o, fnlcrumed at p, and having an arm extending under the rear end of lever i, 'pressure down upon the front end of the lever 0 forcing up the rear end of lever i, as will be readily understood.

Just in rear of the two cutters and the feed-wheel is a pair of edge-iinishing rolls', q r, the upper one of which turns on a shaft, joui-nailed in stationary bearings in the head of the machine, while the shaft of the lower one is journalled in the end of the lever i, as seen at A.

The shaft of the upper roll carries a gear, s, meshing into and chiven by the driving-gear f, so as to make said roll a feeding-device.

The edge of this roll is concave, while the edge of the lower roll is convex, and 11s-.tbe welted edge passes between them, upward pressure being applied to the front end of the lever fi, the edges of the. upper roll will compress and rub down the three adjacent outer' edges of the welt and stock` while the under roll will act against the inner edge of the welt, pressing it into the seam, and smoothing and finishing it.

It will thus be seen that both edges of the welt are trimmed olf and linishcd at one operation, and while the lower or the upper-pronged cutter may be employed alone, I prefer to employ both in the same machine, in order that both edges of the welt may he trimmed at once.

Thev action of the cutters is gauged by the lower prongs, which press against the stock, opened from.-

the welt, as seen at D, and as the onterel-ige of the welt and the adjacent edges ofthe stockarfgirregulai; in width from' the seam, beforefbeing cutth'e vupper fork is so applied that it may yield vertically, in aeeordanoe with this irregular width of edge beyond the seam, the shank of the upper forked eu'tter being, for ,this purpose, fastened to aspring, s and as the lower fork must be pressed hard against the stock, to insure its feed-movement while undef the action of the cutters, the lower iinishing-roll alsohas provision for vertical lyield, its journals being supported upon posts t, which rest upon springs 11.

I claim, in combination with a mechanism for feeding a. stitched welted seam, cutters` for trimming the edges of such welt and seam, such cutters being each provided with prongs for straddling the welt or seam,

and guiding it to theaetionof the cutter, substantially as described.

I also claim, in combination with the feed and trimming-mechanism, 'the edge-iinishing rolls, substantially as shown and described.

I also claim, hanging the upper knife and the lower finishing-roll, withprovision for yielding, substantially as described.

WM. H. ROUN'DS,

Witnesses:

J. B. GR0sBY,' Feuers Gouw.

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