Plastic article or earthenware shaping or treating: apparatus – Female mold including tamping means or means utilizing mold... – Plural female molds
Patent
1989-05-15
1990-06-26
Hoag, Willard
Plastic article or earthenware shaping or treating: apparatus
Female mold including tamping means or means utilizing mold...
Plural female molds
425435, 425457, B29C 4104, B29C 4112
Patent
active
049367676
ABSTRACT:
A device for forming an orthodontic retainer by rotational molding. The device facilitates the production of orthodontic bite retainer appliances by providing uniform mixing of the retainer liquid/powder precursors during the period of initial setting-up to assure a smooth, uniform product. Also described is a modification for providing more than one retainer at a time, as well as a modification to provide formation of the retainer under evacuated exhaust.
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