US2645193A - Sewing machine - Google Patents

Description

y 4, 1953 M. CHINNICI 2,645,193

SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet l INVENTOR CHINNICI ATTORNEY July 14, 1953 cHlNNlc. 2,645,193

SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet 2 INVENTOR MICHAEL CHINNICI ATTORNEY y 1953 M. CHINNlCl 2,645,193

SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet 3 ATTORNEY.

y 1953 M. CHlNNlCl 2,645,193

. SEWING MACHINE Filed Jan. 20, 1950 4 Sheets-Sheet 4 FIG. IO 34 Fl WTFHTLHTTTYHIHH'I IN V EN TOR.

MICHAEL CHINNICI Y B flw/M ATTORNEY.

Patented July 14, 1953 V SEWING MACHINE Michael Ghinnici, Brooklyn, N. Y., assignor to Peerless Sewing Machine Corporation, New York, N. Y., a corporation of New York Application January 20, 1950, Serial No. 139,614

This invention pertains to improvements in stretched during the sewing operation, and the resultant product, after the sewing operation is completed, is a sheet crimped alongits taped edge.

If desired, and as illustrated in the drawings, a band of lace may be inserted between the cloth and the tape during the sewing operation.

Further and other objects and advantages will be apparent from the specification and claims, and from the accompanying drawings which illustrate what is now considered to be a preferred embodiment of the invention.

In the drawings: I

Figure 1 is a front view of the machine showing tape and lace being fed to the work support, through which a pair of side-by-side needles reciprocate;

Fig. 2 is a View of Fig. 1 from the left, showing cloth, tape and lace as they are fed step-by-step under the needles;

Fig. 3 is a view on line 3-3 of Fig. 1 showing the shears for trimming the edge of the sheet, the mechanism for operating the movable shear blade, and the feed dog for feeding the cloth, tape and lace past the needles;

Fig. 4 is a View on line 4-4' of Fig. 3;

Fig. 5 is a view on line 55 of Fig. 4 showing the fixed shearing blade, its means of support and its method of adjustment;

Fig. 6 is a view on line 6-6 of Fig. 4- showing the movable shearing blade and its supporting lever;

Fig. 7 is a view on line 1-1 of Fig. 4 showing the movable shearing blade, the chute for the cuttings, and the manually operable means for putting the movable blade out of shearing relationship with the fixed blade;

Fig. 8 illustrates a tape as it is being attached to a sheet of cloth by two lines of stitching, the waste edge of the cloth being cut away in advance of the tape;

Fig. 9 is the same as Fig. 8 with the addition of a band of lace being sewed between the cloth and the strip of elastic tape in order to produce crimped cloth and lace; and

Fig. 10 is similar to Fig. 8, except that an edge of the tape extends sidewise beyond the edge of the cloth.

'- 2 Claims. (Cl. 112 12s) Referring to Fig. 2, the sheet of cloth 2D is being drawn towards the left over apron 18', along work. support 22 and underneath a shoe 24 pivoted at 26 and urged downwardly by spring 28.

' The cloth is moved step-by-step by means of a feed dog, a portion of which is shown at 30, Fig. 3.

A pair of spaced-apart needles 32 is reciprocated vertically through the cloth in synchronism with the cloth movement.

The tape 34 to be sewed to the cloth is fed from above over a supporting wire 36, past a guiding bracket 33, and through an opening in shoe 24 to a position on top of cloth 20 (Fig. 2).

Bracket 38 is provided with springs 40 manually settable by nuts 42, while the. machine is in operation, whereby the desired tension is produced in the. tape.

If it be desired to sew lace, or the like, on top of the tape, the lace 50 is guided over wire 52 between guide plates 54, 56, with tension controlled by nuts 58 and springs 60, and thence past guide wires 62, 64, to its position above cloth 20 and tape 34. I

If the tape be elastic, nuts 42 maybe adjusted so that the tape is somewhat stretched between bracket 38 and needles 32, whereby, after the tape has passed the needles and its tension is relieved,

the tape will contract to its normal length with the result that the .cloth is crimped, as indicated by the wavy lines 6% in Figs. 9 and 10.

Just in advance of the stitching operation the edge of the cloth is sheared off parallel to the direction of travel, as will be, described, in order to insure a straight edge on the finished product.

The tape may be located with its edge even with the finished edge of the cloth as indicated in Fig. 8, or the tape edge may be on either side of the cloth edge. Fig. 10 shows the tape project: ing beyond the cloth.

Any uneven cloth edge is trimmed off by a pair of shears having a stationary blade 68 and a pivoted blade 10, as shown in Figs. 1, 3, 4 and 6, also in Fig. 5, which is a View of blade 68 from the rear in order to illustrate its means of adjustment. The pivoted blade moves in synchronism with the cloth feeding device.

The fixed blade is adjustably mounted by a clamping screw 12 in an inclined slot 14 (Fig. 5) in the upper part of a member 16 rigidly, but adjustably, clamped at its lower end to frame 18 of the machine by screws (Fig. 4).

Loosening of screws 80 permits close adjustment of member 16 and its attached blade 68 by means of screw 82.

Pivotally mounted on a horizontal shaft 84 near the top of member 16 is a bell-crank lever 3 86 (Figs. 3, 4, 6 and 7) to the horizontal arm of which is attached blade 10 and the waste chute 8B, which receives the trimmings removed by the shears and discharges them onto stationary chute 89.

The horizontal upper arm of the bell crank 86 is bifurcated in such manner that the bifurcated tines span the rigid member 16 as best shown in Fig. 7. After bifurcated tine on the right side of member 16 in Fig. '7 carries the movable blade 10 and the chute 88 and is normally held adjacent the member 16 so as to be in cutting relation to the fixed blade 68 mounted in said member 16. The other bifurcated tine which is on the left side of the member 16, as viewed in Figs. 4 and '7, is pressed against nut 90 by compression springs 92 surrounding the shaft 84.

Referring to Figs. 4 and 6, it will be appreciated that member 86 may be manually adjusted longitudinally on shaft 84 by nut 90 on the threaded end of shaft 84 to place movable blade 10 in proper cutting relationship with fixed blade 68, or entirely out of engagement, if desired.

Compression spring 92, surrounding shaft 34,

insures that contact between the blades is resilient.

Furthermore, the arrangement allows the operator, by turning nut 90, against the resistance of spring 92, to disable the shears by pushing bellcrank 86 to the right, thus putting blade 10 entirely out of cutting relationship with fixed blade 68.

Bell-crank 86 is actuated by eccentric 94 on shaft 96 (Fig. 3) through bent arm 98 and an adjustable, eccentrically mounted, bearing 108 on the lower end of the depending arm of the bellcrank.

It is to be understood that the invention is not limited to the specific embodiment herein illustrated and described, but may be used in other ways without departure from its spirit as defined by the following claims.

What is claimed is:

1. In a sewing. machine having a work support, a needle adapted to reciprocate through said work support, and a feed dog for feeding superposed cloth and tape across said support under said needle: means for trimming the cloth edge so t at said edge will be in desired relationship to said tape, said trimming means including shears hav: ing a fixed blade and a movable blade, a rigid member supporting said fixed blade, a horizontal shaft fixed in said member and projecting therefrom at both shaft ends, a bell-crank supporting said movable blade normally in shearing relationship with said fixed blade, means pivotally mounting said bell-crank on said shaft, means including a spring for biasing said movable blade toward said fixed blade, and means including an adjustable nut for moving said bell crank longitudinally of said shaft against said bias and for moving said movable blade longitudinally away from said fixed blade and out of shearing relationship therewith.

2. In a sewing machine having a frame, a work support, a needle adapted to reciprocate through. said Work support, and means for feeding superposed cloth and tape across said support under said needle: means for trimming the cloth edge so that said edge will be in desired relationship to said tape, said trimming means including shears having a fixed blade and a movable blade, a rigid member mounted on said frame and supporting said fixed blade, 2. horizontal shaft fixed in said member and projecting therefrom at both shaft ends, threads on one end of said shaft, a bell-crank supporting said movable blade normally in shearing relationship with said fixed blade, means pivotally mounting said bell-crank on said shaft, a spring around said shaft between 'said rigid member and said bell-crank and biasing said movable blade toward said fixed blade, and a nut adjustably threaded to the threaded end of said shaft, and retaining said bell-crank against said spring, said nut being so positioned that by moving it further onto said shaft, said bell-crank will be correspondingly moved longitudinally of said shaft against the bias of said spring, and said movable blade may be moved longitudinally away from said fixed blade and entirely out of shearing relationship therewith.

MICHAEL CI-HNNICI.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 249,571 Baker Nov. 15, 1881 790,560 Nike May 23, 1905 1,111,339 Weis et a1 Sept. 22, 1914 1,353,534 Hughes Sept. 21, 1920 2,011,513 Carmichael Aug. 13, 1935 2,021,700 Pugach Nov. 19, 1935

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