Plastic bobbin and a method of manufacturing such a bobbin
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United States of America Patent
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-
May 8, 2007
Grant Date -
May 19, 2005
app pub date -
Jan 23, 2003
filing date -
Jan 30, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bobbin (1) of plastic has a cylinder (2) and, formed integrally therewith, circumferential end flanges (3) and is made of a U-shaped channel. Each end flange (3) consists of a plurality of spaced-apart, essentially radial flange elements (4) which are distributed along the circumference of the cylinder (2). In a method of manufacturing such a bobbin, a U-shaped channel is made by injection moulding. The U shaped channel is given such a shape that its side walls consist of a plurality of spaced-apart wall elements which are distributed along the length of the channel. The channel is bent to form the cylinder (2) and its ends are connected with each other in this bent position.
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