Method and apparatus for tensioning and sewing a tubular workpie

Details Method and apparatus for tensioning and sewing a tubular workpie Method and apparatus for tensioning and sewing a tubular workpie

1982-10-26

1985-04-23

Schroeder, Werner H.

Sewing

Special machines

Tube forming

11212127, 1122622, 474110, 474132, D05B 3500

Patent

active

045122687

ABSTRACT:
An apparatus for supporting and tensioning a tubular workpiece edge such that the edge may be linearly advanced beneath the stitch forming instrumentalities of a sewing machine. The tensioning apparatus includes at least two rotative assemblies which are insertable within the closed loop formation of the workpiece edge. One of the rotative assemblies being connected to a balanced tensioning arm and is adapted for movement between two operative positions in a manner whereby applying a constant circumferential workpiece edge tension on all article sizes.

REFERENCES:
patent: 356355 (1887-01-01), Fisher
patent: 388497 (1888-08-01), McLoughlin
patent: 1299566 (1919-04-01), Emory
patent: 1302313 (1919-04-01), Coppage
patent: 1634051 (1927-06-01), Parsch
patent: 2552725 (1951-05-01), Laquerre
patent: 2684190 (1954-07-01), Glover, Jr.
patent: 3187674 (1965-06-01), Hammelmann
patent: 3572149 (1971-03-01), Cain et al.
patent: 3865058 (1975-02-01), Rovin et al.
patent: 4191117 (1980-03-01), Della Torre

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