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:
Oct. 11, 1994
Filed:
Dec. 07, 1992
Applicant:
Inventors:
Yasuhiro Yokoshima, Ibaraki, JP;
Hiroyuki Aoki, Tokorozawa, JP;
Assignees:
Shonan Gosei-Jushi Seisakusho K.K., Kanagawa, JP;
Yokoshima & Company, Ibaraki, JP;
OAR Inc., Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B29D / ; B32B / ;
U.S. Cl.
CPC ...
428 361 ; 138125 ; 138145 ; 156 94 ; 156287 ; 427140 ; 427238 ;
Abstract
A tubular liner for lining the inner wall of a pipe such as sewer pipe made up of a flexible tubular resin-absorbent fabric to be impregnated with a thermosetting liquid resin and a tubular plastic film welded on the external surface of the tubular resin-absorbent fabric; also disclosed are the methods for making such tubular liner and for impregnating such tubular liner with the thermosetting liquid resin, and in particular the impregnation method is characterized by using a plurality of vacuum suction hoses.