Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including shaping means comprising fluid pressure contacting...
Patent
1977-02-28
1978-07-11
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including shaping means comprising fluid pressure contacting...
425DIG48, 425451, B29C 1704
Patent
active
040999025
ABSTRACT:
A differential pressure forming machine including a pair of endless, sheet supply chains for supporting a deformable thermoplastic sheet and forwardly advancing the sheet, a heater for heating the thermoplastic sheet, a mold for differential pressure forming a shape in the heated sheet, a drive chain for driving the sheet supply chains, a clutch for selectively coupling and decoupling the drive chain and the supply chains, a pair of pneumatic cylinders mounting reciprocally movable pistons which are coupled to opposite ends of the drive chain for driving the sheet support chains in forward and reverse paths of travel, and control mechanism for operating the clutch and the pistons in timed relation so that the sheet support chains and the sheet are incrementally indexed only when the chain moves in said forward path of travel.
REFERENCES:
patent: 3422522 (1969-01-01), Mojonnier
patent: 3513505 (1970-05-01), Brown et al.
patent: 3787158 (1974-01-01), Brown et al.
Lyle Development, Inc.
Spicer, Jr. Robert L.
LandOfFree
Thermoforming machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermoforming machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermoforming machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-259571