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:
Mar. 15, 2011
Filed:
Jun. 08, 2007
Matthias Borchert, Bonn, DE;
Gerd Wolter, Konigswinter, DE;
Harald Lorenz, Bad Neuenahr-Ahrweiler, DE;
Dirk Eulitz, Bonn, DE;
Timo Kramer, Hirz-Maulsbach, DE;
Thomas Froitzheim, St. Augustin, DE;
Joachim Eckhardt, Bonn, DE;
Matthias Borchert, Bonn, DE;
Gerd Wolter, Konigswinter, DE;
Harald Lorenz, Bad Neuenahr-Ahrweiler, DE;
Dirk Eulitz, Bonn, DE;
Timo Kramer, Hirz-Maulsbach, DE;
Thomas Froitzheim, St. Augustin, DE;
Joachim Eckhardt, Bonn, DE;
Kautex Textron GmbH & Co. KG, Bonn, DE;
Abstract
The invention concerns a process for the production of hollow bodies of thermoplastic material by extrusion blow molding. In the process according to the invention continuous extrusion of at least two preforms in web form of plasticized material is effected by means of a plurality of extrusion devices. The preforms are jointly shaped to form a hollow body in the still plastic condition, that is to say in the first heat, within a multi-part tool forming a mold cavity. In that case a wall thickness profile is imparted to at least one preform during the extrusion operation independently of the respective other preform by continuous nozzle gap adjustment during the extrusion operation.