Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including both heating and cooling means
Patent
1993-03-03
1994-05-24
Bushey, Charles S.
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including both heating and cooling means
264555, 264571, 2642101, 425385, 425388, 425818, B29C 5900
Patent
active
053143256
ABSTRACT:
An apparatus for continuous vacuum forming of a hot plasticized material such as vinyl onto a moving flat forming surface defined between a first and second roller member which are continuously rotatable with a flexibly resilient belt and a woven flexible support belt extending therearound. The upper belt is of a flexibly rubber material and the lower belt is of an open woven metallic material to allow air to be drawn therethrough. These belts pass through a flat forming station positioned between two rollers against which vacuum forming is performed. A flexibly resilient pattern form is defined on the flexibly resilient belt including a plurality of vacuum apertures therein such that as the pattern form passes through the flat forming station a vacuum is applied through the woven support belt and to the apertures defined in the form to draw down the hot plasticized material onto the pattern form for continuous vacuum forming. The flexibility of the belts facilitates the vacuum forming operation and provides a flat surface against which the vacuum forming can be performed.
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