Abstract:
An apparatus and method for creating an overlock stitch wherein the excess thread chain (65) extending from the sewing machine needles (19) and the hollow chaining (32) to the previously sewn garment part (60) is stretched and is cut by thread chain cutter (70) to create a leading thread chain of predetermined length extending from the sewing machine needle and the hollow chaining tongue. When cut, the thread chain recoils toward the hollow chaining tongue, and a stream of air draws the free end of the thread chain into the hollow chaining tongue. When the next workpiece is moved through the sewing area, the thread chain in the hollow chaining tongue is attached to the workpiece and is progressively drawn out of the hollow chaining tongue and oversewn in the overlock stitch.
Abstract:
An overlock stitch is formed by sewing machine (11 fig. 1) into a work product (34) and the work product is accelerated away from the sewing machine so as to stretch the thread chain (Fig. 5). The stretched thread chain is cut by cutter (40), and the leading thread chain (43) recoils back toward the hollow chaining tongue (21) and is drawn into the chaining tongue by the stream of air (26) created by vacuum canister (52 Fig. 6). The next work product draws the leading thread chain out of the hollow chaining tongue and the sewing machine captures the leading thread chain in the stitch. Transfer conveyor (15 Fig. 1) moves the work product (34) into alignment with everter tube assembly (106), grippers (109 and 110) grip and open one end of the work product (Figs. 9-14), and air drawn through the everter tube assembly everts the work product. The gripper tube assembly opens along its lower portion (Fig. 16) and drops the work product.
Abstract:
A locker patch attachment system (30) for attaching a locker patch (10) having an arcuate edge (12) to a garment (11) by sewing about the arcuate edge of the locker patch as the garment and locker patch are automatically pivoted about a sewing machine (32) by a patch pivot assembly (70) and a body pivot assembly (105). The patch pivot assembly (70) and body pivot assembly (105) rotate at the same angular speed and about the common axis alpha which is displaced from the needle (22) of the sewing machine (32). The patch pivot assembly (70) includes a pivot plate (72) that holds the garment and locker patch in a fixed, overlaid relationship and rotates in order to pivot the garment and locker patch about the sewing machine (32). The body pivot assembly (105) includes a body gripping arm (108) and body panel plate (152) that engage and hold the body portion (16) as the body pivot assembly (105) rotates about the sewing machine (32), maintaining the locker patch and garment in a fixed radial alignment as they are pivoted about the sewing machine (32). A stacker (211) automatically removes the garment from the sewing machine (32) once the locker patch has been attached thereto.
Abstract:
A thread undercut attachment for use on multi-needle sewing machines uses a single piston (51) to actuate a cutting blade (57) which passes through the sewing area beneath the workpiece and above the loopers. To prevent the needles and loopers from becoming unthreaded or to prevent undue lengths of thread extending from either the work product or the needles after cutting, thread pullers (76 and 91) are provided for creating a measured amount of slack in the threads leading to the needles and loopers, and thread brakes (66, 71 and 81, 86) hold the threads firmly to prevent further payout of thread when the workpiece is pulled toward the operator and as the threads are cut.
Abstract:
A waist band (18) is placed in straddling relationship about spindles (11-14). The waist edge (24) of the garment body (19) is telescoped about the waist band (18), also in straddling relationship about the spindles (11-14). The garment parts are advanced by the rotation of the spindles (11-14) past a sewing needle (17) that forms a line of stitching at the aligned edges of the shirt body and waist band. In the meantime, the end spindles (11 and 13 and 14) move longitudinally along the sewing path to adjust the position of the waist band in response to the position of the folded edges (22, 23) of the waist band (18) as detected by band sensor (128), and the star wheels (119) engage and urge the waist band (18) and the garment body (19) toward or away from the sewing path (16) as controlled by band and body edge sensors (112, 129). When the previously sewn edges of the garment parts begin to return to the sewing machine (36), one of the spindles (13) moves laterally so as to stretch the garment parts more, so as to remove any bunching of the waist edge (24) of the garment body (19) at the sewing needle (17) and presser foot (39), to avoid forming a wrinkle in the garment body (19) at the end of the line of the stitching (29).