Sewing – Special machines – Positionable work carrier
Patent
1996-01-16
1998-02-10
Lewis, Paul C.
Sewing
Special machines
Positionable work carrier
112114, 112235, D05B 2900, D05B 300, D05B 2100
Patent
active
057157669
ABSTRACT:
A presser unit for a bar tacking sewing machine comprises four separate clamp feet 15, 16, 17 and 18 which conform in outer appearance to the U-shaped stitches I--I, II--II and III--III to be formed at the tip end of the waist band portions of pants and a pressing mechanism 60 for elastically press each clamp feet 15, 16, 17 and 18 against a workpiece A with a given pressure thereby to elastically press the workpiece A. As a result, it is possible to provide the presser unit for a bar tacking sewing machine which can perform sewing with improved efficiency and high quality without generating discontinuous stitches and the breakage of a needle, since the tip ends of the waist band portions of pants can be sewn in U shape continuously and easily irrespective of the longitudinal and lateral variation of thickness of the workpiece A and moreover without adjusting a pressure mechanism by applying four separate clamp feet to a portion to be sewn of the workpiece A in such a way as to fit the shape and thickness thereof.
REFERENCES:
patent: 2808794 (1957-10-01), Ayres
patent: 3295484 (1967-01-01), Boser et al.
patent: 4699072 (1987-10-01), Tsukioka
patent: 5146859 (1992-09-01), Conley, Jr. et al.
patent: 5205231 (1993-04-01), Sanvito et al.
patent: 5441001 (1995-08-01), Conley, Jr. et al.
Lewis Paul C.
The Singer Company N.V.
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