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. 14, 1995
Filed:
Oct. 27, 1992
Applicant:
Inventor:
Yoshihiro Koyanagi, Osaka, JP;
Assignee:
Kabushikikaisha Kashiwaraseitai, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65D / ;
U.S. Cl.
CPC ...
383100 ; 383102 ; 383103 ; 426395 ; 426106 ;
Abstract
A bag fabricated of plastic film and particularly suited for holding pulverulent or granular food products, such as rice, is provided with a check valve which is also fabricated of plastic film. The check valve includes a filter surface located in the fluid flow path of the check valve. The check valve allows egress of air or other fluid from the bag and prevents ingress of air into the bag, while the filter serves to retain the bag contents within the bag.