Title: Knife operating device for sewing machines

Abstract: A knife operating device for sewing machines includes a needle stub pivotally mounted to the front part of a rocking arm. The rocking arm intersects with a needle stub guiding bar and is pivotally mounted and its rear end. A knife holder is, also, connected to the rocking arm and is guided so as to be movable with the needle stub.

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Inventors: Hirayama, Tetsuro (Chofu, JA)
Yuyama, Kousuke (BOTH OFTokyo, JA)
Matsuura, Yoshihiko (BOTH OFTokyo, JA)

Application Number: 519243
Filing Date: 1974-10-30
Publication_date: 1977-07-26
Assignee: Juki Co., Ltd. (Tokyo, JA)
Primary Class(es): 112/122.1 112/128, 112/221
Other Classes:
US Patent Ref:

334114	Jan, 1886	Eastwood	112/128.
1946558	Feb, 1934	Weis	112/128.
2493735	Jan, 1950	Alifano et al.	112/128.
2538272	Jan, 1951	Reimer et al.	112/123.
3167042	Jan, 1965	Bono	112/123.
3450081	Jun, 1969	Rabinow	112/221.
3645221	Feb, 1972	Hirayama	112/221.

Other Refs:
Primary Examiner: Hunter, H. Hampton
Assistant Examiner:
Attorney: Weintraub; Arnold S.