Sewing – Stitch forming – Bobbin ejector
Patent
1975-09-22
1977-01-11
Larkin, G. V.
Sewing
Stitch forming
Bobbin ejector
112186, D05B 5726
Patent
active
040021300
ABSTRACT:
The disclosure is directed to automatic bobbin rewinding for sewing machines. A two-station mechanism is provided enabling bobbins to be transferred from a winding position to a sewing position, with one bobbin being at all times in each position. When a bobbin is exhausted, that bobbin and its case are removed from the sewing machine and, simultaneously, a filled bobbin is removed from the winding position and combined with its case. The bobbin positions are then reversed, enabling the filled bobbin and its case to be inserted in the sewing machine, while the just-removed bobbin is separated from its case and inserted in the winding position. The filled bobbin remains attached to the main thread supply until it is inserted in the sewing position, enabling the thread to be guided and controlled until picked up by the sewing mechanism, thus avoiding the need for manual intervention. With the old bobbin in the rewind position, the remaining, unused thread is first extracted from it, and then the thread supply is guided into engagement with the empty bobbin in preparation for rewinding. The rewinding operation is carried out while the filled bobbin is being used in the sewing operation, so that there is continuity of operation of the sewing machine.
REFERENCES:
patent: 2733676 (1956-02-01), Schumann et al.
patent: 3115110 (1963-12-01), Ketterer
patent: 3125973 (1964-03-01), Bernerus et al.
patent: 3308776 (1967-03-01), Ivanko et al.
patent: 3376838 (1968-04-01), Schiffmacher et al.
patent: 3744442 (1973-07-01), Michaels et al.
patent: 3747547 (1973-07-01), Mayer et al.
Opuszenski Theodore
Pellicano Joseph
Rovin Herman
Swenson Alan F.
Automatech Industries Inc.
Larkin G. V.
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