US601857A - Tuck-greaser - Google Patents

Description

E. RINK. TUGK GREASER.

(No Model.)

Patented Apr 5', 1898.

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WILLIAM'E. RINK, OF NEWARK, NEW JERSEY.

TUCK-CREASER.

SPECIFICATION forming part Of Letters Patent NO. 601 ,85'7, dated April 5, I898.

A li tio filed October 27, 1897. Serial No.656,4=93. (No model.) V

To all whom it may concern:

Be it known that I, WILLIAM E. RINK, acitizen of the United States of America, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a certain new and useful Improvement in Tuck- Oreasers, of which the following is a specifi cation. I

My invention has reference to improvements in tuck-creasers for sewing-machines, and has for its objects to simplify the construction of the creaser and to remedy certain defects in the operation of the creaserarm.

Heretofore the creaser-arm of the tucker has been reciprocated or oscillatedby means of the needle bar or arm or other oscillating or vibrating part of the sewing-machine, it usually being engaged by a projection on the needle-bar on the downward stroke of the latter. In high-speed machines the contact of said projection with the creaser-arm causes hammering, and the force which the needlebar is required to exert on the creaser-arm to properly crease the work subjects the machine to considerable strain and in time racks the operating parts.

The nature of my invention will best be understood when described in connection with the accompanying drawings, in which- Figure 1 represents an end View of the head of a sewing-machine provided with my improved tuck-creaser. Fig. 2 is a side View of the same. Fig. 3 is a detail plan view of the creaser-arm and the parts to which it is attached. Fig. 4 is 'a vertical section on the line 4 4, Fig. 2.

Similar letters and numerals of reference designate corresponding parts throughout the several views of the drawings.

Referring to the drawings, the letter A designates the bed of the machine, B the overhanging arm, 0 the needle-bar, D the presserbar, (1 the presser-foot, and E the work-table, all constructed and. arranged in a usual;

On the bed A of the machine and in close proximity to the vertical part of the arm 13 is secured a block 1, having its top provided with a longitudinal recess 2, Figs. 3 and 4, into which is neatly fitted a flexible plate 3, made of sheet metal or other suitable material possessing resilience in a proper degree. Said plate is secured to the block 1 by means of a screw or rivet 4 and is prevented from turning laterally by the ledges at the sides of the block. The end of the plate 3 toward the needle-bar overlaps the corresponding end of the block andis adapted to be engaged by a cam 5, Figs. 2 and 4, secured tothe main shaft F of the machine, the bed of the machine andthe table being suitably slotted to permit the passage of the cam. To the said plate3 the creaser-arm 6 is connected so as to be longitudinally adjustable with respect to said plate by any suitable means. In the present example I have shown the rear end of the creaser-arm slotted, as at 7, and adj ustably connected with said plate by a clamp ing-screw 8, passing through said slot and entering the plate in close proximity to the end of the same. The cre'aser-arm is held from turning by a lip or lug 9*, formed on the plate 3 and closely fitting the slot 7. The

free end of the oreaser-arm is turned downwardly, as at 9, andsuitably recessed to crease the Work in combination with the upturned end of the creaser-gage 10, which latter is adjustable toward and from the needle in the.

usual manner. A usual tucker-gage 11, adjustably mounted, is provided. The creaserarm 6 is made similarly to the plate 3, of sheetsteel or other material possessing the proper degree of resilience, and is carried forward from the plate 3 with its free end between the needle and the presser-bar, so as not to interfere with easy accessibility in threading, adjusting, or changing the needle. To the free end of the oreaser-arm 6 is attached a spiral spring 12, having its opposite end connected either directly to the arm of the machine or to a lug 13, attached to said arm.

Normally the creaser end 9 of thecreaserarm 6 is a short distance above the creasergage 10, so as to permit the Work to be readily inserted. When the high part of the cam IOO marking or creasing the work resting on said gage. The repeated blows mark or crease the work in a straight line as it is moved forward by the usual feed. At high rates of speed the tendency of the elastic creaser-arm is to fly upwardly too far in View of the rapidly-occurring contact with the high portion of the cam and to its inertia or momentum. The force of the blow being thus increased tends to cut the work, and to avoid this I make use of the spring 12, previously referred to, which spring by compression on the upward movement of the creaser-arm offers a gradually-increasin g resistance to suchmotion and therefore acts as a retarding or governing device. In practice this spring is connected to the creaser-arm with practically little or no tension on its coil.

The adjustment of the creaser-arm with respect to the width of tuck to be creased is effected by means of the screw-andslot connection 8 and 7 with the plate 3. The adjustment of the creaser-gage 10 and hemmergage 11 is effected as usual.

It is of course to be understood that the plate 4 could be omitted and the creaser-arm attached directly to the block by means of a slot and screw, as 7 and 8; but the construction shown is preferable, as it permits of the necessary longitudinal adjustment for the widest tuck required without requiring extra length of the overhanging arm B of the machinethat is to say, an increased distance between the needle-bar and the inner side of the vertical member of the armthus rendering the tucker attachment adaptable for all sewing-machines.

IVhat I claim as new is 1. In a tuck-creaser for sewing-machines,

the combination of a creaser-gage, a flexible creaser-arm having one end adjustably secured and its other end extending over the creaser-gage, a cam placed in engagement with said creaser-arm for vibrating the same, and a spring having one end in connection with said creaser-arm and its other end attached to a fixed part of the machine for the purpose of preventin gwhippin g of the creaserarm, substantially as described.

2. In a sewing-machine, the combination with a stitch-forming mechanism, of a flexible plate attached to the bed of the machine, a creaser-arm having an adjustable connection with the plate and having its forward end extending between the needle-bar and presser-bar, a cam mounted on the main shaft of the machine and engaging with said plate, a spring connected with the arm of the machine and with the free end of the creaserarm, a creaser gage cooperating with the creaser-arm, and a tucker-gage, substantially as described.

3. In a tuck-creaser for sewing-machines, the combination of a flexible plate, a creaserarm slotted at its rear end, means for connecting said creaser-arm to the platelocated near the end of the plate toward the needlebar, a creasergage cooperating with the creaser-arm, and a cam acting on said plate, substantially as described.

In testimony that I claim the foregoing as myinvention I have signed my name, in presence of two witnesses, this 23d day of October, 1897.

WILLIAM E. RINK. Witnesses:

S. H. PENNINGTON, J r., EUGENIE A. PERSIDES.

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