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:
Jun. 07, 1994
Filed:
May. 11, 1992
Applicant:
Inventor:
Klaus-Peter Voss, Lengerich, DE;
Assignee:
Windmoller & Holscher, Lengerich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425 721 ; 425143 ; 4253261 ; 4253871 ;
Abstract
An apparatus is provided for controlling the flow of air for external cooling of a tubular film issuing from an extruder head. To ensure that the flow of the air for external cooling to the point at which the tubular film begins to expand can be controlled regardless of the distance from that point to the extruder head, flow-directing flaps are evenly distributed around the tubular film and are displaceable along the tubular film.