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:
Apr. 20, 1982
Filed:
Aug. 11, 1980
Applicant:
Inventor:
Keiichi Takahashi, Ichikawa, JP;
Assignee:
Tokan Kogyo Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29D / ; B32B / ;
U.S. Cl.
CPC ...
264516 ; 156108 ; 156212 ; 156287 ; 264522 ; 425504 ;
Abstract
A double-walled paper container produced by placing a preformed paper container in a shaping die set cavity of a vacuum draw shaping apparatus, positioning a single piece of synthetic resin film or sheet on the top of said paper container, holding the film at the peripheral edge thereof, heating the film to make the plastic film, stretching the film and applying negative pressure to the film to line said preformed paper container with the film is in water-tight fashion and wherein the lined paper container has a good shape holding ability and is hygienic for the user thereof.