Backlatch attachment with a rotatable thread catcher

Details Backlatch attachment with a rotatable thread catcher Backlatch attachment with a rotatable thread catcher

1986-11-24

1988-04-19

Falik, Andrew M.

Sewing

Elements

Frames

112286, 112288, 112253, D05B 6506

Patent

active

047382104

ABSTRACT:
An attachment for a semi-automatic sewing machine ensures that any excess thread chain extending from the leading or trailing edge of a garment during an operation on the garment with the sewing machine, is stitched directly to the garment so that no loose or free ends of thread chain are provided. The completion of stitching by the sewing machine of a first garment is sensed and the first garment is engaged in response to the sensing by a rubber wheel which moves the garment away from the stitching needle more quickly than the sewing machine stitches the stitch chain. The excess thread chain is automatically severed by a movable plate rotating with respect to a stationary plate, and the excess severed thread chain is automatically positioned by an air blower in association with a rotatable thread catcher so that excess thread chain is stitched to the second garment by the sewing machine. The rotatable thread catcher comprises a tapered wheel with a serrated ring catching thread blown onto the wheel. The wheel has recesses which cooperate with the blower to spin the wheel, a one-way clutch allowing rotation in only one direction.

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