Invention Grant
- Patent Title: Method of fabricating sewing machine needles
- Patent Title (中): 缝纫机针的制作方法
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Application No.: US705860Application Date: 1976-07-16
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Publication No.: US4037641APublication Date: 1977-07-26
- Inventor: Josef Zocher
- Applicant: Josef Zocher
- Applicant Address: NY New York
- Assignee: The Singer Company
- Current Assignee: The Singer Company
- Current Assignee Address: NY New York
- Main IPC: D05B85/02
- IPC: D05B85/02 ; B21G1/02 ; B21G1/04 ; B21J5/06
Abstract:
The steps in the manufacture of a sewing machine needle are disclosed in which the needle blade is shaped by first being subjected to a flow-pressing operation to form a groove with raised side flanges and thereafter the eye portion is subjected to a die pressing operation which can further raise the side flanges. The needle is then completed by eye punching, pointing, and fin removal.
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