Machine for automatically changing lower-thread bobbins

Details Machine for automatically changing lower-thread bobbins Machine for automatically changing lower-thread bobbins

1993-05-25

1994-05-31

Crowder, Clifford D.

Sewing

Stitch forming

Bobbin ejector

D05B 5726

Patent

active

053159446

ABSTRACT:
An automatic bobbin-winding machine, in particular for lockstitch machines, comprises a changing head (27) with pneumatically driven gripping levers (30,31) for removing the lower part (35) of the bobbin case holder from the sewing machine. The changing head (27) can pivot or oscillate about various axes (39,40,41) and move on a carriage (26). It cooperates with a magazine (22) arranged alongside the axis (39). A second changing head (27') which can pick up empty and full bobbins (2) alternately may also be arranged on the carriage (26).

REFERENCES:
patent: 2438459 (1948-03-01), Sebell
patent: 2690725 (1954-10-01), Schumann et al.
patent: 2733676 (1956-02-01), Schumann et al.
patent: 3376838 (1968-06-01), Schiffmacher et al.
patent: 3981256 (1976-09-01), Sexton
patent: 5143004 (1992-09-01), Mardix
Japanese Patents Gazette, Section Ch: Chemical, Derwent Publications Ltd., 1986, pp. 7-8.

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