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:
May. 27, 2003
Filed:
Jun. 18, 2001
Gerhard Keller, Jongny, CH;
AISA Automation Industrielle SA, Vouvry, CH;
Abstract
A method and a device for the continuous production of tubular bodies with an internal longitudinal separating wall for the production of tubes having two chambers which are separated from each other. An endless extruded tube having an internal longitudinal separating wall is produced and individual tubular bodies of a defined length are cut off by means of a cutting device and subjected to further processing. The tubular body is made from a film having a central, semicircular part and two angled lateral wings. The semicircular part is covered by a second film serving as separating wall. A transverse cutter having two rotating blades is used as cutting device. The rounded extruded tube having a longitudinal separating wall is fed between the two rotating blades after having been collapsed and oriented in such a way that the collapsed extruded tube has a central three-layered part which consists of the collapsed, oriented separating wall in the middle and an upper and lower flat tubular wall body section on either side, as well as two two-layered areas which adjoin the three-layered area on both sides. In this way each two-layered area consists of bent, superimposed tubular body wall sections.