Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Rod or tubular preform
Patent
1979-10-22
1981-11-03
Derrington, James H.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Rod or tubular preform
264313, 425403, 425DIG12, 425DIG14, B29H 518
Patent
active
042983304
ABSTRACT:
A curved mandrel, method of making same, and method of curing an uncured polymeric hose employing such curved mandrel are provided and the curved mandrel comprises a plurality of members disposed in end-to-end relation to define the configuration of the mandrel including a predetermined curvature therein, interlocking portions for interlocking the members in only one position to define the configuration and curvature, and a readily attachable and detachable device for holding the members axially against each other after interlocking wherein the members with the interlocking portions and holding device are adapted to provide a substantially straight mandrel for installation of an uncured straight hose therearound, define the configuration and curvature in the mandrel and uncured hose, and provide looseness and axial spacing between members to enable easy withdrawal of the cured curved hose from around the members.
REFERENCES:
patent: 1801346 (1931-04-01), Heath
patent: 2970343 (1961-02-01), Johnson
patent: 4015918 (1977-04-01), McPhee
patent: 4030871 (1977-06-01), Cobb
patent: 4052498 (1977-10-01), Buron
patent: 4197079 (1980-04-01), Patzner
Bricker Charles E.
Dayco Corporation
Derrington James H.
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