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:
Feb. 17, 2015
Filed:
Apr. 17, 2008
Richard Zimmermann, Bonn, DE;
Richard Zimmermann, Bonn, DE;
Kdesign GmbH, Konigswinter, DE;
Abstract
A method of cooling blown film consisting of thermoplastic plastics during the production of blown film by means of a blown film extruder with a film blowing head which comprises an annular nozzle from which the blown film emerges and is guided away in an extraction direction, wherein at least two cooling gas flows are made to approach the blown film from the outside in at least two blowing-out planes located at a distance from the annular nozzle, wherein at least one cooling gas flow Kis blown out in the direction opposed to the extraction direction of the blown film and wherein at least one cooling gas flow Kis blown out in the extraction direction of the blown film, and wherein, at least one of the cooling gas flows K, Kcan be controlled around their circumference in sectors, at least in respect of its volume flow or temperature.