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Title:
Molding apparatus to form a three dimensional product on a web material
Abstract:
Continuous production of a molded three-dimensional product employs an indexing rotatable drum having along its periphery a plurality of mold cavities into which molten thermoplastic material is introduced, and a web of material permeable to the molten thermoplastic material and which is guided along the drum periphery. In one embodiment the thermoplastic material enters the cavities through the web to which the thermoplastic is subsequently bonded. The thermoplastic material in the cavities is then shaped and cooled before it is removed from the cavities by dissociating the web from the drum periphery. In a second embodiment the molten thermoplastic material is introduced into the cavities before the web is associated onto the drum periphery. After cooling the thermoplastic to bond it to the web, the web is dissociated from the drum and removes the molded thermoplastic from the cavities.
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Inventors:
Doleman, Jack (Melbourne, FL, US)
Application Number:
317192
Filing Date: 1972-12-21 Publication_date: 1976-03-23 Assignee:
Primary Class(es):
425/115
47/9, 425/122, 425/129.1, 425/805
Other Classes:
US Patent Ref:
Other Refs:
Primary Examiner:
Husar, Francis S.
Assistant Examiner:
Rowold, Carl
Attorney:
Rose & Edell
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