Combined mold element and sealing ring

Details Combined mold element and sealing ring Combined mold element and sealing ring

1977-02-07

1977-12-06

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Including product handling means

425393, 425DIG44, 425DIG218, B29C 1702

Patent

active

040614590

ABSTRACT:
The combined mold element and sealing ring is formed of an elastically yieldable body and a rigid reinforcing non-elastic member within the body on a side spaced away from the leading edge of the body. The unit may be generally drop-shape, or otherwise, and is formed with minimal bulk.
Positioning of the reinforcing member close to the outer radial portion of the elastic body reduces the manufacturing costs of the combined element as the bulk of the element may be reduced and the positioning of the rigid member in the rubber molds is facilitated. The reduced bulk also facilitates the molding of a thermoplastic pipe end over the unit to form a socket by reduced stretching of the pipe.
The positioning of the rigid ring member also facilitates the anchoring effect of the combined element when used in a pipeline with internal pressure.

REFERENCES:
patent: 3377659 (1968-04-01), Hucks
patent: 3773456 (1973-11-01), Salz et al.
patent: 3776682 (1973-12-01), Parmann
patent: 3907481 (1975-09-01), Heisler

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