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:
Nov. 30, 1993
Filed:
Jan. 22, 1993
Hiroshi Ogawa, Osaka, JP;
Teruo Takinoue, Osaka, JP;
The Pack Kabushiki Kaisha, Osaka, JP;
Abstract
A packing bag comprises a flat main body made of a synthetic resin film or sheet, sleeves formed around a top end of the main body and each divided into upper and lower chambers, and drawstrings each inserted in the respective chambers of each sleeve. A plurality of engaging portions in the form of knurled indentations are formed between the upper and lower chambers and below the lower chambers so that an increased friction and a reduced stiffness are imparted to the sleeve, in such manner that after the top end portions are gathered by pulling the drawstrings in opposite directions, the increased friction and reduced stiffness prevent the top end from opening unintentionally due to a possible resilient restoration of its ungathered state.