Sewing – Special machines – Darning
Patent
1980-07-14
1982-11-23
Nerbun, Peter P.
Sewing
Special machines
Darning
112275, D05B 1900
Patent
active
043599532
ABSTRACT:
A semiautomatic sewing system (10) comprises a sewing machine (12), a drive unit (42) including a variable speed motor and encoder for counting stitches sewn, material edge sensors (40) mounted in spaced relationship in front of the needle (22) of the sewing machine, and a microprocessor controller (51) coupled to the sewing machine controls. Accurate control of seam lengths and end points is achieved by initiating countdown of a variable preprogrammed number of final stitches responsive to material edges detected by the sensors (40) only when the stitch count falls within a predetermined window of values so that inaccuracies from stitch counting are limited to a small portion of the overall seam length. If the sensors (40) do not detect a material edge within the window of stitch values, the sewing system (10) reverts to pure stitch counting to determine seam length.
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Vol. 3, No. 3, Journal of the Apparel Research Foundation (1969), pp. 1-32.
Isett Don D.
Leslie Elmer N.
Martell Charles R.
Treadwell Stephen S.
Microdynamics, Inc.
Mills Jerry W.
Nerbun Peter P.
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