B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/41, 18/708
B29C 1/14 (1980.01)
Patent
CA 1139912
ABSTRACT OF THE DISCLOSURE A method and apparatus is disclosed for forming integrated truss structures wherein the molding apparatus includes a plurality of alternating male mold members and female mold members arranged in two opposed layers or mold havles. The male mold members each have a plurality of open grooves formed therein which are disposed orthogonally therein and slope away from a top or plateau surface thereof. Each of the female mold members has a centrally located, generally circular recessed cavity with a plurality of open grooves which are orthogonally disposed with regard to one another and which slop away from the plane of the recessed cavity. When the two layers each including male and female members are positioned opposite one another, the open grooves in opposed male and female members become aligned to define strut beam chambers and plateau surface of the male member is aligned with the recessed cavity of the female member to define a junction chamber. Thus, a plurality of strut beam chambers slope away from each junction chamber. When the mold halves are brought together they define between the alternate symmetrical upper and lower junction chambers interconnected by a plurality of strut chambers. Channels are formed preferably in the female members, for injecting a moldable material such as plastic into the strut beam chambers and the junction chambers. After injection occurs, the molds are separated to thereby form an integrally molded truss structure. The resulting integrated truss structures can be incorporated with exterior or interiorly mounted members to make composite truss panel structures having a wide variety of uses. The present invention also concerns techniques for securing such members to or within truss structures and the composite stuctures produced thereby.
342224
Gowling Lafleur Henderson Llp
Hardigg Industries Inc.
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