Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article
Patent
1987-09-30
1991-05-07
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Producing multilayer work or article
264523, 264541, 425525, 425532, B29C 4904, B29C 4922, B29C 4952
Patent
active
050135171
ABSTRACT:
Blow molded container and related process are provided wherein a container having at least an upper, non-self-supporting, flexible portion is blow molded to include an integral press-lock type closure about its upper open end. The blow mold cavity is formed to provide a rib or bead about one-half the periphery of the container open end, and a hollow recess about the other one-half of the periphery of the container open end. the upper end of the finished container may be flattened along its upper edge and closed by pressing the rib into the recess. It one embodiment of the invention, the lower portion of the container may be of greater thickness, but nevertheless integral with the upper portion, so as to be stable or self-supporting. In another embodiment, the container may be non-self-supporting throughout while, in still another embodiment, the container may be self-supporting throughout its length.
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patent: 4756629 (1988-07-01), Tilman et al.
McCarthy Neil M.
Silbaugh Jan H.
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