Thread handling

Details Thread handling Thread handling

1979-06-18

1982-03-23

Reynolds, Wm. Carter

Sewing

Stitch forming

Revolving-hook type

112245, 1122621, D05B 112, D05B 4900

Patent

active

043207120

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.

REFERENCES:
patent: 1129588 (1915-02-01), Onderdonk
patent: 1548464 (1925-08-01), Hemleb
patent: 2173320 (1939-02-01), DeVoe
patent: 2400602 (1946-05-01), Rubel
patent: 2853036 (1958-02-01), Enos
patent: 3012529 (1961-12-01), Ketterer et al.
patent: 3083661 (1963-04-01), Patrick
patent: 3476067 (1969-11-01), Johnson
patent: 3587495 (1971-06-01), Johnson

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