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:
Jun. 06, 1995
Filed:
Sep. 30, 1993
Applicant:
Inventors:
Assignee:
Tokai Rubber Industries, Ltd., Komeki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B06B / ; B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 23 ; 264 25 ; 264 26 ; 264173 ; 264211 ; 264295 ; 264296 ; 264322 ; 264339 ; 264D / ;
Abstract
A method of producing a bent resin tube by heating a certain portion of a straight resin tube to be bent partially by a partial bending means, and bending the heated certain portion partially by a partial bending die, thereby rendering a desired bend shape to the tube. In this method, a large die for constraining the shape of the whose tube or a large oven is not required. Therefore, space for equipment can be reduced, and production efficiency is enhanced because the time required for bending operations is decreased remarkably. The heating may be done by high frequency induction heating, high frequency dielectric heating, or other conventional heating.