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:
Jul. 22, 2008
Filed:
May. 15, 2003
Markus Berger, Sehnde, DE;
Rainer Oehl, Grossburgwedel, DE;
Klaus Binder, Sarstedt, DE;
Contitech Luftfedersyteme GmbH, Hannover, DE;
Abstract
A method for the production of reinforced tube-shaped structures () of rubber layers and reinforcement layers () has the steps of: a) applying a first rubber layer () with a first extrusion unit () onto a series of sequential rigid cylindrical mandrels () which are coupled to each other and which are driven at an advancement speed (v) in the direction of an advancement axis (x); b) applying a first filament layer at defined desired filament angles (α) referred to the advancement axis (x) with a bobbin creel unit () having means which rotate about the advancing mandrels (); c) applying atleast one further rubber layer () to the first filament layer utilizing at least one additional extrusion unit (); d) continuously measuring the advancement speed (v) of the mandrels (); controlling the quantity, which is applied via the first extrusion unit (), in dependence upon the measured advancement speed (v) in order to obtain a defined desired thickness of the first rubber layer (); f) controlling the rotational speed of the first bobbin creel unit () during the rotation about the mandrels () in dependence upon the advancement speed (v) in order to obtain a filament layer having a defined desired filament angle (α).