Sewing – Special machines – Buttonhole
Patent
1978-02-27
1979-05-22
Jaudon, Henry
Sewing
Special machines
Buttonhole
83355, D05C 1522
Patent
active
041553187
ABSTRACT:
A looper comprising a looper main body of steel and a blade of cemented carbide alloy. The looper main body includes a mounting portion, a vertical portion provided at the right end of the mounting portion, a horizontal portion extending from the upper end of the vertical portion horizontally rightward and a tip portion extending downward from the right end of the horizontal portion. The blade is attached to a continuous hook-shaped recessed portion formed in the main body and defined by the inner edges of the vertical portion, the horizontal portion and the tip portion. The looper is highly resistant to wear, flexible, inexpensive to manufacture and capable of efficiently cutting chemical fibers which are difficult to cut.
REFERENCES:
patent: 2800096 (1957-07-01), Signoret
patent: 3152563 (1964-10-01), Broadrick
patent: 3732771 (1973-05-01), Kinoshita et al.
patent: 3779123 (1973-12-01), Chafee
Jaudon Henry
Oujevolk George B.
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