Trimming mechanism for sewing machines

Details Trimming mechanism for sewing machines Trimming mechanism for sewing machines

1975-01-27

1976-09-14

Krizmanich, George H.

Sewing

Work manipulating

Trimmers

112125, 112219A, D05B 3700

Patent

active

039800318

ABSTRACT:
A trimming mechanism for a sewing machine for cutting the edges of a workpiece in the feeding direction by means of a reciprocating trimmer blade cooperating with a stationary counterknife. While sewing at high speed the trimmer blade is driven by the arm shaft of the sewing machine normally in synchronism with the needle. Drive- and control means are provided for imparting additional up and down movements to the blade when sewing at a low speed and continuation of trimming when the machine is stopped, in order to turn the workpiece about the needle, which is required when changing the sewing direction.

REFERENCES:
patent: 2105346 (1938-01-01), Card
patent: 2108138 (1938-02-01), Painter
patent: 2533197 (1950-12-01), Pinkvoss

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