Method of and apparatus for controlling sewing rate in sewing ma

Details Method of and apparatus for controlling sewing rate in sewing ma Method of and apparatus for controlling sewing rate in sewing ma

1988-10-27

1989-11-28

Nerbun, Peter

Sewing

Elements

Frames

112221, 112277, D05B 6918

Patent

active

048830089

ABSTRACT:
A method of and an apparatus for controlling the sewing rate in a sewing machine is disclosed that comprises a reciprocally and vertically movable needle, a motor for driving the needle and a throat plate on which a work is to be placed having a needle hole through which the needle moves reciprocally and vertically. The sewing machine is adapted to repeatedly perform a cycle in which the needle moves downwardly from the upper dead center to the bottom dead center passing through the needle hole and then upwardly from the bottom dead center to the upper dead center passing through the needle hole and the cycle is adapted to take place in such a manner that while the needle is below the throat plate the needle is moved at a rate higher than that at which the needle is moved while the needle is above the throat plate.

REFERENCES:
patent: 4332208 (1982-06-01), Watasue et al.
patent: 4340002 (1982-07-01), Hanyu et al.
patent: 4386301 (1983-05-01), Neki et al.

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