High speed indexing system

Details High speed indexing system High speed indexing system

1977-02-25

1980-01-08

Scott, Samuel

Sewing

Stitch forming

Feeding work material

192 12B, 112320, D05B 2714

Patent

active

041822510

ABSTRACT:
The present invention teaches a high-speed indexing system for use with any number of fabric-moving apparatus, a novel braking system for use within the indexing system, and a novel puller accessory. The high-speed adjustable indexing system is illustrated in connection with a sewing machine, as an example. In sewing machine applications, a synchronized intermittent advancement of fabric in unison with the movement of an associated feed dog is provided. Undesirable inertia-caused roller overshooting, heretofore treated with anti-reverse clutches and other approaches, is eliminated, thereby enabling high speed indexing at machine operating speeds conventionally unattainable in the art. An adjustable spring-biased braking arrangement is provided which may be preset for known machine operating speeds.

REFERENCES:
patent: 2860738 (1958-11-01), Johansen
patent: 3083658 (1963-04-01), Winberg
patent: 3104639 (1963-09-01), Reeber
patent: 3106265 (1963-10-01), Driesch
patent: 3140760 (1964-07-01), Rasmussen
patent: 3510083 (1970-05-01), Cook
patent: 3747827 (1973-07-01), Stanton et al.

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