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US 4,903,852 AGranted
Plastics container
AssigneeMitsui Petrochemical Industries, Ltd.
InventorKazuhiro Masumoto
Life of this patent
Estimating the term…
Abstract
A blow-molding method and its apparatus and a molded drum thereby are improved in that: a lower mold is divided into two pieces, i.e., a split-type mold having a ring-like configuration and a lower mold itself, so that the molding operation of a chime of the molded drum is facilitated.
Claims1
A plastics container molded by a blow-molding operation and provided with a chime in its top-portion, comprising:
- an annular projection formed in an outer periphery of said chime;
- suitable number of ring-like bands formed in an outer circumferential surface of a trunk portion of said plastics container, said ring-like band being in its outer diameter similar to that of said annular projection of said chime;
- a ground plate provided with a curved surface portion in its outer periphery and having its bottom surface adapted to an inner diameter of said chime by means of said curved surface portion;
- and
- a cross-like rib containing a pinch-off portion therein and provided inside said ground plate in projecting manner.
2 more elements
Dependencies are inferred from the claim text.