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, 1992
Filed:
Feb. 25, 1991
Sakura Rubber Co., Ltd., Tokyo, JP;
Abstract
A method of producing a hose having low permeability includes the steps of preparing a rubber mandrel having an outer releasing layer made of fluoride rubber, applying a silicon-based releasing agent having a viscosity of 300-1000 cs to the releasing layer in a state where the mandrel is being moved, and extruding a molten resin and coating it onto the releasing agent-applied mandrel while the mandrel is being moved, thereby forming a resin layer. By virtue of the provision of the releasing layer and also the application of the releasing agent to the releasing layer, the releasability of the mandrel is enhanced, thereby preventing the resin layer of the resultant hose from being injured when the mandrel removed therefrom. Hence, if the hose is used for transferring a refrigerant gas such as freon refrigerant, it is free from gas leakage, and shows high durability.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile