System for minimizing platen drive shaft flex in a...

Details System for minimizing platen drive shaft flex in a... System for minimizing platen drive shaft flex in a...

2005-08-09

2005-08-09

Mackey, James P. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

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

Coacting shaping surfaces

C100S282000, C425S451600

Reexamination Certificate

active

06926513

ABSTRACT:
A system for minimizing platen drive shaft flex in a thermoforming press employed in a thermoforming process is provided. The thermoformer press molds plastic sheets into finished articles. The system minimizes rotational vibrations in a platen drive shaft that actuates the thermal press. Reenforcing plates, or doubler plates, are added as auxiliary frame members, to reduce flex in the platen drive shaft. The doubler plates support the drive shaft along the length of the shaft. The doubler plates include bearings positioned proximate to linkages. The linkages interconnect the drive shaft and the platens. The doubler plates are preferably positioned proximate to the linkages, on the drive shaft and opposite frame bearings. The system can include yoked pivots to support both sides of bearings in the linkages between the drive shaft and the platen. The yoked supports evenly transmit forces between the platen drive shaft to the platens. Preferably, the system minimizing platen drive shaft flex is free of counterbalancing elements in the linkages between the drive shaft and the platens.

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patent: 6200122 (2001-03-01), Chun et al.
patent: 6314873 (2001-11-01), Lee et al.

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