Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1988-12-20
1990-09-04
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
198692, 198838, 1988603, B29C 4928, B65G 1510
Patent
active
049540661
ABSTRACT:
A chain guide structure for guiding a conveyor chain through a thermoforming machine to protect the chain from plastic chips and other debris. The chain guide includes a support rail structure for supporting an upper run of conveyor chain, and a spring steel cover sheet overlying a track defined by the support rail and in close proximity with the chain to serve as a cover and thereby protect the chain from contamination from foreign material. Additionally, the chain includes a series of spikes to penetrate a plastic sheet and thereby carry it through the machine, wherein the chain guide structure has a width sufficient to permit lateral outward expansion of the plastic sheet as it is heated in the thermoforming machine. An upwardly inclined portion of the guide structure provides a cooling section to permit the plastic sheet to cool as it is carried away from a forming section of the machine.
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Leary Lynn
Schumann Ronald C.
Cincinnati Milacron Inc.
Hoag Willard
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