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:
Apr. 26, 1977
Filed:
Sep. 23, 1975
Applicant:
Inventor:
Werner Josef Zimmermann, Lengerich of Westphalia, DT;
Assignee:
Windmoller & Holscher, Lengerich of Westphalia, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
425 / ; 264 95 ; 4253 / ;
Abstract
In a blowhead for producing tubular film from thermoplastic material flowing from an extruder, a central supply conduit branches into a plurality of radial distributing passages having their axes in substantially one plane. Each distributing passage extends into an axial passage portion that is parallel to the supply conduit and that opens into a distributing helix. Inlet and outlet tubes for cooling air are provided between the axial distributing passage portions.