Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Extrusion shaping means
Patent
1980-02-05
1981-05-05
Hoag, W. E.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Extrusion shaping means
425115, 425127, 425329, 425335, 425363, 425366, 425376B, 425471, B29C 2300, B29D 900, B29D 3100
Patent
active
042656079
ABSTRACT:
An apparatus for fabricating a plastic insulator having helical-shaped shields or screens, these shields radially protruding from an insulator rod. Two oppositely rotating rolls coact to form an infeed gap for the material forming the shields which is infed in a kneadable condition in transverse direction to the rolls. According to a first embodiment drive means serve to rotate the rolls about their axes and the insulator rod about its lengthwise axis. Means provide relative mutual movement of the pair of rolls and the insulator rod in the direction of the lengthwise axis of the insulator rod or parallel thereto, in order to simultaneously form the shield and apply the same to the insulator rod. According to a further embodiment both of the rolls have peripheral grooves and these rolls, with the exception of such peripheral grooves, bear against one another at their outer surfaces, and drive means serve for rotating the rolls for forming a shield or screen rod.
REFERENCES:
patent: 3679344 (1972-07-01), Ballint
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