Sewing – Stitch forming – Feeding work material
Patent
1994-04-28
1996-04-23
Lewis, Paul C.
Sewing
Stitch forming
Feeding work material
112235, 112319, D05B 2710
Patent
active
055093663
ABSTRACT:
A puller device of a sewing machine having a stitch-forming mechanism alternately engageable and disengageable with a garment for stitching the garment and a feed mechanism for feeding the garment through the stitch-forming mechanism. The puller device comprises a puller roller downstream of the feed mechanism for uniformly pulling the garment when the stitch-forming mechanism is disengaged from the garment. The puller device also comprises a feed rocker shaft, clampingly-attached to the feed mechanism, for driving the puller roller in synchronization with the stitch-forming mechanism, intermittently engaging the puller roller when the stitch-forming mechanism is disengaged from the garment and intermittently disengaging the puller roller when the stitch-forming mechanism is engaged with the garment. The puller device includes first and second presser feet positioned adjacent the puller roller for urging the garment against the puller roller. First and second pneumatic cylinders are operatively connected to the first and second presser feet, respectively, for selectively and independently moving the first and second presser feet into and out of engagement with different thicknesses of the garment.
REFERENCES:
patent: 1828722 (1931-10-01), Sailer
patent: 1852482 (1932-04-01), Seavers et al.
patent: 2481286 (1949-09-01), Bouwkamp
patent: 2611333 (1952-09-01), Ritter
patent: 2687704 (1954-08-01), Galkin
PFAFF 5642 Service Manual & List of spare parts Pfaff, D-6750 Kaiserslautern, Postfach 3020/3040.
Clinton Industries, Inc.
Lewis Paul C.
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