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:
Nov. 21, 2023
Filed:
Feb. 04, 2020
Applicant:
Ka Group Ag, Zurich, CH;
Inventor:
Laurentius Andreas Gerardus Mentink, Haaksbergen, NL;
Assignee:
KA GROUP AG, Zurich, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 53/08 (2006.01);
U.S. Cl.
CPC ...
B29C 53/083 (2013.01);
Abstract
A method for making a preformed thermoplastic tube having a tube wall and including at least one bend formed by thermoforming, characterized in that on an inner curve of the bend the tube wall is provided with a pattern of corrugations with minimal dimensions in terms of number of and heights of corrugations such that a wall length reduction resulting from the corrugations along the inner curve is kept at a minimal value necessary to absorb overlength on the inner curve resulting from forming the bend, and in that on an outer curve of the bend the tube wall is smooth and free of corrugations.