The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 1990
Filed:
May. 18, 1989
Katsutoshi Ochi, Gunma, JP;
Tokitaro Suzuki, Tochigi, JP;
Hisao Ogawa, Ibaraki, JP;
Hideo Shibata, Nara, JP;
Masaru Takada, Nara, JP;
Sekisui Kaseihin Kogyo Kabushiki Kaisha, Nara, JP;
Abstract
Disclosed herein is an improved method for forming a double wall container by laminating a thermoplastic resin sheet for a container main body and a breathable thermoplastic resin sheet or film for an inner body with a low-melting adhesive, heating the laminate sheet at a forming temperature, and forming the heated laminate sheet by using a male and female molds arranged with a certain space, characterized in that the container main body and the breathable inner body are separated with a prescribed distance from each other by vacuum suction through the female mold or by air pressure through the male mold. On account of the double wall structure, the container prevents the content from becoming sticky and deteriorated and keeps the content fresh.