Bobbin case tool and method of use

Details Bobbin case tool and method of use Bobbin case tool and method of use

2006-01-17

2006-01-17

Izaguirre, Ismael (Department: 3765)

Sewing

Method of sewing

C112S188000

Reexamination Certificate

active

06986317

ABSTRACT:
A bobbin case tool to aid in the removal and installation of a prior art bobbin case on a sewing machine. The bobbin case tool includes an elongated arm having a clearance, a pair of lead in chamfers, a locking tooth disposed between the pair of lead in chamfers, and a locking tooth face. In application, the bobbin case tool designed to engage a releasing lever of the bobbin case and operatively pivot the releasing lever to an unlock position. The bobbin case tool is positioned so that the locking tooth is engaged in a spindle clearance of the releasing lever. The releasing lever of the bobbin case is rotated by the bobbin case tool until the releasing lever forces a locking plate of the bobbin case out of a spindle locking groove of a sewing machine's bobbin holder.

REFERENCES:
patent: 1414026 (1922-04-01), Laliberte
patent: 3376838 (1968-04-01), Schiffmacher et al.
patent: 3460411 (1969-08-01), Dyer
patent: 3882805 (1975-05-01), Bianchi
patent: 3908438 (1975-09-01), Norden
patent: 4362071 (1982-12-01), Coker
patent: 5603273 (1997-02-01), Nakamura et al.

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