Conical bobbin and method of forming same

Details Conical bobbin and method of forming same Conical bobbin and method of forming same

1985-05-08

1987-02-24

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Tube making

Frustoconical tube

2421183, B31C 702

Patent

active

046454837

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.

REFERENCES:
patent: 371989 (1887-10-01), Stone
patent: 1911671 (1933-05-01), Blauvelt
patent: 1923856 (1933-08-01), Wasser
patent: 2013748 (1935-09-01), Dunlap
patent: 2056636 (1936-10-01), Whiting, Jr.
patent: 2060642 (1936-11-01), Smith
patent: 2644376 (1953-07-01), Raymond
patent: 3402646 (1968-09-01), Hall
patent: 4116403 (1978-09-01), Ikeda

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