Collapsible mandrel for making fiber tubes

Details Collapsible mandrel for making fiber tubes Collapsible mandrel for making fiber tubes

1975-03-24

1976-10-26

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including product handling means

249178, 249183, 249184, 242 721, 279 2R, B29C 1300

Patent

active

039881032

ABSTRACT:
A reusable cylindrically shaped, pivotally collapsible, foam mandrel used for the manufacture of hollow resin impregnated fiber tubes. The mandrel includes a substantially rigid foam cylindrical member, an extractable bar, and a means on the outer surface of the foam member for aiding in collapsing the cylindrical member, such as a groove. In one embodiment a hinge member is employed to further aid in the pivotal collapsibility of the foam cylindrical member.

REFERENCES:
patent: 950827 (1910-03-01), Smith
patent: 1009002 (1911-11-01), Welch
patent: 2297648 (1942-09-01), Cushman
patent: 2583626 (1952-01-01), Buell
patent: 2585999 (1952-02-01), Bunch
patent: 3345438 (1967-10-01), Carey
patent: 3677688 (1972-07-01), Morgan
patent: 3729147 (1973-04-01), Hardy
patent: 3811632 (1974-05-01), Bassett
patent: 3831898 (1974-08-01), Sachs

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