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. 11, 1981
Filed:
Sep. 01, 1978
Raymond J Dopkin, Wilmington, DE (US);
Jerome Hochberg, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Tubing of a thermoplastic polymer for handling corrosive materials is laminated or reinforced by covering the same with a heat-softenable bonding agent as an adhesive, inserting the adhesive-covered tube in a cylindrical glass fabric sleeve, inserting the assembly in a hollow cylinder, heating the tube to a temperature to cause the softening of the bonding agent and adhesion to the tube, forcing the tube with air or centrifugal force against the inside of the cylinder to force softened bonding agent into the interstices of the glass fabric, and cooling the entire assembly while expanded to adhere the bonding agent to the fabric and thereby form a unitary structure. The reinforced tube can be bonded to the inside of a preformed steel or fiberglass-reinforced plastic pipe to serve as a protective liner therefor.