B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
20/31, 18/637
B29C 67/20 (2006.01)
Patent
CA 2001945
An insulated molded plastic structural unit includes spaced face portions, an intermediate portion and interlocking portions. The face portions each include an integrally formed stressed hard outer skin section and the intermediate portion includes an insulating core section. The interlocking portions include mateable sections along at least two edges of each unit, each mateable section including at least five alternating raised and recessed areas forming an asymmetrical pattern along the length thereof. The pattern is the same or a reverse thereof along each mateable section of the same unit and of adjacent units to which it will be joined. Particular mateable sections either extend beyond the face portions or are recessed below the face portions a substantially equal distance. Continuous molding apparatus includes a raw material supplying portion, a mixing portion, a molding portion and a control portion. The molding portion includes at least one rotatable mold assembly with at least two separable mold sections. At least one mold section includes a plurality of rotatable mold surface elements with each having a plurality of different mold surface segments.
Gowling Lafleur Henderson Llp
Payne Leroy
LandOfFree
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