Apparatus for manufacture of sealing closures for a telecommunic

Static molds – Uniting preform with molding material – Mold supported by and girdles preform

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156 49, 249 97, 249205, 277123, 277125, 277237R, B29C 4124, B29C 4138

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047250356

ABSTRACT:
In a low pressure mold, the mold parts have surfaces for forming a mold cavity and which are covered in a thermally insulating coating with a thickness from 0.005 inches to 0.050 inches. The coating may be formed from epoxy resin or polytetrafluorethylene. Also provided is a sealing member for a low pressure mold, the sealing member having in-series edge regions around a body and each edge region is formed with a semi-circular sealing edge or arrangement of edges. The sealing edge or arrangement of edges of each edge region is different from other edge regions. When the two sealing members are mounted upon mold halves at each end of a low pressure mold, they may be changed in position to locate any associated pair of sealing edges in opposition across the mold closure line.

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