Invention Grant
- Patent Title: Self-attaching female fastener elements and method of forming same
- Patent Title (中): 自连接母扣件及其形成方法
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Application No.: US10546412Application Date: 2003-11-24
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Publication No.: US07651401B2Publication Date: 2010-01-26
- Inventor: Harold A. Ladouceur , John M. Parker
- Applicant: Harold A. Ladouceur , John M. Parker
- Applicant Address: US MI Taylor
- Assignee: Whitesell International Corporation
- Current Assignee: Whitesell International Corporation
- Current Assignee Address: US MI Taylor
- International Application: PCT/US03/37525 WO 20031124
- International Announcement: WO2004/050269 WO 20040617
- Main IPC: B21D53/24
- IPC: B21D53/24 ; B21H3/08

Abstract:
The method of forming self-attaching female fasteners by rolling a continuous metal strip including a central pilot portion having parallel sides and flange portions on opposed sides, severing at least the pilot portion and cold forming the rectangular pilot portion into a cylindrical end portion. Wing-shaped radial portions are formed in the pilot portion which may be severed or remain for anti-rotation features. The strip may remain continuous, wherein the severed pilot portions are spread and the flange portions are thinned or the strip may be severed into discrete fasteners. The female fasteners thus include generally cylindrical pilot portions and rectangular flange portions which may include rolled grooves.
Public/Granted literature
- US20060252560A1 Self-attaching female fastener elements and method of forming same Public/Granted day:2006-11-09
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