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. 03, 2012
Filed:
Dec. 11, 2006
Applicants:
Holger Frische, Hasbergen, DE;
Tim Oberdalhoff, Lienen, DE;
Gerd Ratz, Lienen, DE;
Inventors:
Assignee:
Windmoeller & Hoelscher KG, Lengerich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 47/90 (2006.01);
U.S. Cl.
CPC ...
Abstract
A blown film extrusion line has an annular die gap, from which a film tube can be extruded, a flatness unit or nip rolls, which fold the film tube, a calibration basket, which is disposed between the die gap and the flatness unit or nip rolls, and which has at least two film-guide elements that guide the film tube such that the film tube retains its round cross-section, with the diameter of the film tube being adjustable by changing the relative position of the two film-guide elements. The calibration basket includes a coupling device that couples the movement of the two film-guide elements to each other.