Sewing – Special machines – Darning
Patent
1990-11-13
1993-04-20
Crowder, Clifford D.
Sewing
Special machines
Darning
112141, 112147, 112152, 112322, 112306, 112153, D05B 3502, D05B 3510, D05B 2710
Patent
active
052032680
ABSTRACT:
An apparatus for sewing elastic hems on fabric pieces is designed as a tandem machine. In a first sewing machine (26a), an elastic band (6) is prefixed at the edge of a fabric piece (8). During further conveyance thereof, the thus created double-ply structure is folded by 180.degree. by a baffle plate (34). A pair of conveying rollers (36, 38) withdraws the double-ply structure from the baffle plate. Between the first sewing machine (26a) and a second sewing machine (26b), provided for finishing the elastic hem, there is provided a deflection roller (40) deflecting the triple-ply structure, formed by said folding and consisting of fabric edge portion, an elastic band, and a fabric folding portion, from the horizontal. The deflection roller (40) is driven in a direction opposite to the conveying direction and thus takes care that the triple-ply structure, also in case of curved seams, remains closed and is sewn correctly.
REFERENCES:
patent: 4441438 (1984-04-01), Takahashi
patent: 4458610 (1984-07-01), Dowell
patent: 4473017 (1984-09-01), Letard et al.
patent: 4681051 (1987-07-01), Kirch et al.
patent: 4998965 (1991-03-01), Easom
Crowder Clifford D.
Lewis Paul C.
Schips AG Nahautomation
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