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:
Mar. 28, 2000
Filed:
Feb. 24, 1998
Takao Kamiyama, Hiratsuka, JP;
Yasuhiro Yokoshima, Ibaraki-ken, JP;
Shigeru Endoh, Yasato-machi, JP;
Hiroyuki Aoki, Tokorozawa, JP;
Shonan Gosei-jushi Seisakusho K.K., Kanagawa-ken, JP;
Yokoshima & Company, Ibaraki-ken, JP;
GET Inc., Ibaraki-ken, JP;
OAR Company, Saitama-ken, JP;
Abstract
A pipe liner bag is provided with improved anti-peeling and anti-bursting properties by ensuring a high anti-peeling strength of the plastic film to be employed. The pipe liner bag has a tubular resin absorbent material, the outer surface of which is coated with a highly air-tight plastic film, and a hardenable resin impregnated in the tubular resin absorbent material. The tubular resin absorbent material is formed of tubular unwoven fabric subjected to the needle punching processing, where a side of the tubular unwoven fabric having stuck-out needles protruding therefrom is exposed to the outside to serve as an outer surface of the tubular resin absorbent material. The outer surface is coated with a plastic film.