Frame positioning device for automatic stitching apparatus

Details Frame positioning device for automatic stitching apparatus Frame positioning device for automatic stitching apparatus

1977-09-26

1979-05-08

Schroeder, Werner H.

Sewing

Special machines

Darning

318 45, 318685, D05B 2100

Patent

active

041529944

ABSTRACT:
For an automatic stitching apparatus of a type comprising at least one sewing machine having a stitching needle operable to perform a stitching operation to form an embroidery pattern on a fabric supported on an embroidery frame, a frame positioning device includes a holder for holding the frame in position relative to the stitching needle, X-axis and Y-axis drive mechanisms each including pulse responsive stepping motors mechanically connected to each other to provide an X-axis or Y-axis output drive necessary to move the frame in a predetermined direction to a given coordinate position, and first and second linkage mechanisms for transmitting the X-axis and Y-axis drives, respectively, to the frame holder. The stepping motor for each drive mechanism is connected in such a manner that the associated rotors are angularly offset from each other with respect to the axis of rotation of the rotors.

REFERENCES:
patent: 3268785 (1966-08-01), Gerber et al.
patent: 3497778 (1970-02-01), Gerber
patent: 3752098 (1973-08-01), Logan et al.
patent: 3970016 (1976-07-01), Yanikoski
patent: 3977337 (1976-08-01), Yanikoski
patent: 3982491 (1976-09-01), Herzer et al.
patent: 4003322 (1977-01-01), Yanikoski
patent: 4050393 (1977-09-01), Welcher et al.
Bickford, J. H. Mechanisms for Intermittent Motion, N. Y., Industrial Press Inc., 1972, p. 207.

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