Sewing – Work manipulating – Guides
Patent
1980-11-17
1984-03-27
Schroeder, Werner H.
Sewing
Work manipulating
Guides
D05B 306, D05B 302
Patent
active
044387156
ABSTRACT:
For a family sewing machine having the capabilities to complete a buttonhole in a single step, an arrangement is provided to permit an operator to reinitiate the buttonhole operation in the event of a thread breakage in the middle of the buttonhole, however, without necessitating stitching during that part of the buttonhole in which stitching has already been implemented. If a thread breakage takes place and after repair thereof the buttonhole may be repositioned to the initiating position and the buttonhole pattern may be reselected together with, for example, a selection of reverse feeding or any other input which is not normally selected during buttonholing. This dual selection is effective to signal the needle bar release logic to suspend endwise reciprocation of the needle bar. The sewing machine feed proceeds as though stitching were taking place, and just before the point of thread breakage is reached the needle bar release logic can be defeated so that stitching may proceed from a point one or two stitches prior to the point of breakage.
REFERENCES:
patent: 3872809 (1975-03-01), Adams et al.
patent: 4000706 (1977-01-01), Kneissl et al.
patent: 4135459 (1979-01-01), Manabe et al.
patent: 4161150 (1979-07-01), Brown
Dunn William H.
Edwards William J.
Minalga Philip F.
Bell Edward L.
Falik Andrew M.
Schmidt Edward P.
Schroeder Werner H.
Smith Robert E.
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