Double wall plastic article and method and apparatus for...

Details Double wall plastic article and method and apparatus for... Double wall plastic article and method and apparatus for...

B - Operations, Transporting

29

C

18/1070, 18/1071

B29C 51/00 (2006.01) B29C 51/08 (2006.01) B29C 51/14 (2006.01)

Patent

CA 1101792

ABSTRACT OF THE DISCLOSURE A double wall plastic article and a method and apparatus for forming a double wall article with a pair of deformable thermoplastic sheets wherein the sheets are mounted, in face to face contiguous relation, on a single pair of laterally spaced longitudinally extending rails. The rail supported, contiguously disposed sheets are heated to forming temperature and are then subjected to differential forming pressures via a pair of opposed molds which seal to the sheets to fuse perimetrically extending, opposed portions of the sheets and form the border of the article being formed. Differential pressure is then applied to a central portion of at least one of the sheets within the formed border to withdraw the central portion and form the article. -1-

302352

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