Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Labeling or embossing indicia
Patent
1992-12-10
1993-12-21
Timm, Catherine
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Labeling or embossing indicia
264316, 264540, 425812, B29C 4904, B29C 4962
Patent
active
052718824
ABSTRACT:
A process for making a blow molded product which includes the steps of positioning a sheet having a surface pattern which is incompatible with a parison in a mold for blow molding; extruding a softened parison of a synthetic resin from a die head; holding the parison in the mold and blowing gas into the parison to be expanded to form a blow molded product with a surface feature of the sheet reproduced on the blow molded product; and separating the sheet and the blow molded product from each other. An apparatus used for the process is provided with a mold defining a cavity for blow molding, a die head for extruding a parison of a synthetic resin into said mold, a sheet positioned between the mold and the parison which is formed an effective surface thereon and incompatible with the material of the parison, a gas blowing device for blowing gas into the parison to form a blow molded product, a sheet supply device for supplying a sheet in the cavity of the mold, and a sheet takeup device for taking up the sheet from the mold after blow molding.
REFERENCES:
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patent: 3550197 (1970-12-01), Szajna et al.
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patent: 4418033 (1983-11-01), Hatakeyama
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patent: 4639341 (1987-01-01), Hanamoto et al.
patent: 4857258 (1989-08-01), Le Doux et al.
Hirose Toshio
Shirahata Itaru
Timm Catherine
Tokai Kogyo Kabushiki Kaisha
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