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. 16, 1993
Filed:
Nov. 26, 1990
Takayoshi Imoto, Otsu, JP;
Masahiro Seshimo, Nishinomiya, JP;
Futoshi Makimoto, Otsu, JP;
Eiji Kitagawa, Kyoto, JP;
Ashimori Industry Co., Ltd., Osaka, JP;
Abstract
A lining material for pipe lines, especially those buried in the ground and a process for providing pipe lines therewith are disclosed, which includes a flexible tubular film, a sheet covering the outer surface of the tubular film and a film capable of being split off covering the outer surface of the sheet, characterized in that the sheet includes a fabric and a mat of fibers of high tenacity impregnated with a thickened liquid thermohardenable resin to form a fabric-fiber-reinforced composite molding sheet having a sufficient length and a width greater than the inner circumferential length of a pipe line to be treated, and that both lateral end portions of the sheet are slidably overlapped with each other to form a tube around the tubular film, the outer circumferential length of the tube being shorter than the inner circumferential length of the pipe line. The present invention is distinguished by using a specific fabric-fiber-reinforced composite molding sheet as the predominant constituent of the lining material in place of the conventional SMC and overcomes all the drawbacks in the prior art. The lining material is particularly suited for lining sewage pipes.