Method and apparatus for sewing tape in a sewing machine

Sewing – Elements – Frames

Patent

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Details

1122623, 112306, 11212126, 11212111, 05B 3506, 05B 3510, 05B 1900, D05B 3506, D05B 3510, D05B 1900

Patent

active

052692574

ABSTRACT:
A method and apparatus is disclosed for attaching a continuous tape to a circular edge of a tubular workpiece with a sewing machine, and cutting the tape so that an overlapping length of the tape tail end on the sewing front portion of the tape is of a uniform length for various kinds of workpieces without changing the preset conditions.
The apparatus has a stitch counter, a tape cutter and a thickness detecting sensor of the light transmission type for detecting the presence or absence of thick materials in front a presser foot 2. In the tape sewing process, when the sewing front end makes a full turn and reaches the thickness detecting sensor and this sensor detects that the quantity of transmitted light is lower than a specific level, the stitch counter begins to count the number of stitches, and when the low level continues over a specific number of stitches, the tape cutter is actuated.

REFERENCES:
patent: 4038931 (1977-08-01), Kosrow et al.
patent: 4455954 (1984-06-01), Franck, III et al.
patent: 4635575 (1987-01-01), Schips
patent: 4714036 (1987-12-01), Raisin et al.
patent: 4967674 (1990-11-01), Rohr et al.
patent: 5054409 (1991-10-01), Schips

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