Thread handling
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United States of America Patent
Stats
-
Mar 23, 1982
Grant Date -
N/A
app pub date -
Jun 18, 1979
filing date -
Jun 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thread handling device is disclosed in a type 301 lockstitch rotary hook loop taker sewing machine having a three-to-one hook to arm shaft ratio for controlling and metering slack needle thread prior to needle penetration to prevent the thread from wrapping around the point of the needle, which could prevent loop seizure, break the thread, or interfere with correct stitch formation. The thread is guided between two stationary members, with the controller between the members, the controller comprising an edge attached to the needle bar drive connecting link, moving with it, and only engaging the thread as the take-up and needle bar descend, providing a lengthened thread path prior to needle penetration.
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Cited Art Landscape
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