Conical bobbin and method of forming same
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United States of America Patent
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-
Jul 2, 1985
Grant Date -
N/A
app pub date -
May 24, 1982
filing date -
May 27, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cone-shaped bobbin is formed by rolling and gluing a paper or the like blank on a mounting mandrel with the cone being formed with a decreasing number of layers of paper or the like from bottom to top. Three embodiments of the blank are disclosed respectively in the shape of a crescent, a half-crescent, and a comma.
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