Sewing – Special machines – Having tube end tensioner
Patent
1995-10-20
1997-04-22
Izaguirre, Ismael
Sewing
Special machines
Having tube end tensioner
112305, 112318, D05B 2710
Patent
active
056221290
ABSTRACT:
An automated circular sewing machine system for attaching an elastic band to a tubular body of fabric or simply forming and sewing a hem thereon. The system includes, among other things, a sewing head which is located between a pair of elongated work holding roller assemblies which project outwardly on either side of the sewing head. The roller assemblies include a front or feed side roller assembly and a rear or drive and tensioning roller assembly. The front roller assembly is free wheeling and is fixed in position relative to the sewing head. The drive and tensioning roller assembly includes a movable drive and tensioning roller driven by a motor and consisting of a solid unitary member which is generally cylindrical with a rounded outer nose portion and an inner fabric support surface. The entire drive and tensioning roller assembly is pre-positioned by a laterally movable clamping plate assembly to a fixed position relative to the sewing head depending on the size of the tubular body being sewn. The drive and tensioning roller is thereafter moved, i.e. rotated, away from a generally vertical "home" position a predetermined distance from the sewing head and front roller assembly by a pneumatically activated piston to tension to the member or members being sewn prior to and during a sewing operation. After the sewing operation is completed and prior to an unloading operation, the drive and tensioning roller is returned to its home position also under control of the pneumatic piston.
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Izaguirre Ismael
Jet Sew Technologies Inc.
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