Cloth edge control device for a sewing machine
AssigneeJuki Corporation
InventorsHiroshi Honda, Nozomi Iwasaki
Life of this patent
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Abstract
A cloth edge control device for a sewing machine includes a pair of rollers, an optical sensor, and controller. The pair of rollers are arranged near a needle location in such a manner that the rollers are rotating about an axis perpendicular to a direction in which a cloth material is fed, so as to be pushed against the cloth material. The optical sensor is adapted for detection of the cloth material at a plurality of points on a line along a direction intersecting with the feed direction before the needle location. The controller detects the position and curvature of the edge of the cloth material according to a light intercept signal from the optical sensor and rotates the rollers independently of each other according to the position and curvature thus detected.
Claims4
A cloth edge control device for a sewing machine, comprising:
- a pair of rollers adapted to be positioned near a needle location, said rollers being rotatable about an axis perpendicular to a direction in which a cloth material is fed and being pushed against fed cloth material;
- an optical sensor for detection of fed cloth material at a plurality of points on a line along a direction intersecting the feed direction;
- and
- control means for detecting the position and curvature of the edge of fed cloth material according to light intercept signals from said optical sensor, and for rotating said rollers independently of each other according to said position and curvature thus detected.
Dependencies are inferred from the claim text.