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:
Aug. 12, 1980
Filed:
Oct. 02, 1978
Applicant:
Inventor:
Alfred Puck, Basel, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
156156 ; 156175 ; 156425 ;
Abstract
A method of manufacturing a glass fibre reinforced pipe by winding a first resin impregnated pipe layer of glass fibres oriented approximately in the circumferential direction and setting the layer so formed. The set first pipe layer is then subjected to axial pressure loading by an external force and a pressure medium from inside. A second resin impregnated pipe layer having glass fibres extending approximately in the axial direction is then applied to the loaded first pipe layer, and set. After setting, the external pressure force and the pressure medium are removed so that a residual stress or prestress condition forms in the finished pipe.