Plastic article or earthenware shaping or treating: apparatus – Diverse distinct type shaping means – Shaping orifice and either a downstream preform reshaping...
Patent
1981-06-15
1983-11-22
Hayes, Lorenzo B.
Plastic article or earthenware shaping or treating: apparatus
Diverse distinct type shaping means
Shaping orifice and either a downstream preform reshaping...
425217, 425404, 425445, B29C 300
Patent
active
044166079
ABSTRACT:
An apparatus for continuously extruding, biaxially orienting and intermittently forming molded products from a web of thermoplastic material and further, continuously separating the products from the web selvage, stacking and handling the products and recycling the web selvage for further extrusion. The apparatus uses intermittent molding and biaxial orientation devices into which configuration the continuously extruded web is interfaced by continuous-to-intermittent interfacing loop arrangement which preserves the dimensional and orientational integrity of the web and maintains sufficient thermal stability therein to provide molded products which are free from defects such as stretch marks and other inertial and thermal discontinuities normally anticipated in cases of intermittent web advance of thermoplastic material at thermoformalbe temperature levels.
REFERENCES:
patent: 3676537 (1972-07-01), Winstead
patent: 4086045 (1978-04-01), Thiel et al.
patent: 4234530 (1980-11-01), Thiel et al.
Hayes Lorenzo B.
Maryland Cup Corporation
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