Sewing – Special machines – Article attaching
Patent
1980-07-11
1982-11-16
Hunter, H. Hampton
Sewing
Special machines
Article attaching
112128, 1122652, 2265, D05B 312
Patent
active
043590080
ABSTRACT:
A sewing machine (10) for mass producing zipper closable garment pocket entries (65) includes a pair of pocket entry (65) in a plurality of garments (50,72,80). The apparatus 10 is a modification of a conventional type of double needle sewing machine and includes knife blades (18) spaced laterally apart from each other which cooperate with a pair of conventional double needles (12) to cut in advance of each stitch (58) and enable provision of a square miter at the ends of each finished pocket entry (65). The knife blades (18) are disposable between and behind the two needles (12) in the material feed direction. A feeder mechanism feeds continuous zipper tape (38) across the throat plate (16) beneath the needles (12) and knife blades (18) which may be selectively lowered and raised by the operator. The knife blades (18) operate in conjunction with the needle bar (14) movement only when engaged so as to cut in advance of each stitch while being unaffected by needle bar movement when disengaged. The zipper tape (38) is thus sewn onto the garment as it is advanced across the throat plate (16) while the engaged knife blades (18) simultaneously cut two parallel longitudinal slits (60) in the garment (50,72,80) at the pocket location between the outer extremeties of the sewn zipper tape (38). A conventional zipper slide (68) provided on the zipper chain (44,46) is used to lock the two sewn chains (44,46) together in place with a zipper fastener (70) being provided at the ends of each pocket entry (65) to provide the zipper closure. The pocket closure (65) is finished by transversely cutting (63) the slit garment material adjacent the ends of the slits to complete the square miter at these ends which are tucked in to finish the pocket entry (65).
REFERENCES:
patent: 2388516 (1945-11-01), Altobelli
patent: 3003445 (1961-10-01), Crystal
patent: 3570434 (1971-03-01), Gustavsson
patent: 3710745 (1973-01-01), Yoshikawa
patent: 3968523 (1976-07-01), Newman
patent: 4103562 (1978-08-01), Boser
patent: 4169421 (1978-06-01), Foults
patent: 4274347 (1981-06-01), Rohren
patent: 4297954 (1980-05-01), Gauthier
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