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:
Sep. 15, 2009
Filed:
Jun. 13, 2006
Applicants:
Heinrich Dohmann, Hoexter, DE;
Reinhard Witt, Bad Oeynhausen, DE;
Inventors:
Heinrich Dohmann, Hoexter, DE;
Reinhard Witt, Bad Oeynhausen, DE;
Assignee:
American Maplan Corporation, McPherson, KS (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 47/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
An mandrel for extrusion of hollow bodies, such as, polyvinyl chloride (PVC) hard, compact, and foamed pipes, includes an inner collar and an outer collar, and webs radially joining the inner collar and outer collar. The webs can be arranged twisted and/or offset in radial direction.