Thread cutting device of sewing machine

Sewing – Elements – Thread cutting – severing or breaking

Reexamination Certificate

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Details

C112S300000

Reexamination Certificate

active

07603957

ABSTRACT:
A thread cutting device includes a thread catching member having a catching portion, wherein the thread catching member moves back and forth across a path of a lower thread reeled out from a bobbin so as to catch the lower thread by the catching portion and cuts the lower thread by cooperating with a fixed knife, a first power transmitting portion which transmits a power to the thread catching member, a first cam member provided on a lower shaft rotated by a sewing machine motor and transmits a first moving force to the thread catching member through the first power transmitting portion, a second power transmitting portion which transmits a second moving force from a stepping motor to the thread catching member through the first power transmitting portion.

REFERENCES:
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patent: 3173392 (1965-03-01), Hedegaard
patent: 3380416 (1968-04-01), Du Buis et al.
patent: 3403648 (1968-10-01), Jarrett
patent: 3470835 (1969-10-01), Hoverter, Jr. et al.
patent: 3554149 (1971-01-01), Diehm et al.
patent: 4138958 (1979-02-01), Papajewski
patent: 4365568 (1982-12-01), Ross
patent: 5964170 (1999-10-01), Gries
patent: 6814018 (2004-11-01), Chuo
patent: 3106472 (2000-09-01), None

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