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. 29, 1999
Filed:
Nov. 20, 1997
Applicant:
Inventors:
Zygmunt Madrzak, Heidenheim, DE;
Karl Ruck, Heidenheim, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; B65H / ;
U.S. Cl.
CPC ...
2426152 ; 226 95 ; 162368 ; 492 12 ; 492 20 ;
Abstract
A drum for guiding a material web, in particular a paper web. The drum has a jacket and a hollow interior. A respective cover at each end of the jacket. A respective bearing journal at each cover for supporting the roll to rotate. The jacket has a plurality of passage openings for passage of air therethrough. At least one and perhaps two impellers inside the interior of the drum, each having a suction side for drawing air into the drum through the passage openings. A pressure side at the other side of the impeller. Air exits the drum from the pressure side of the impeller through passage openings and/or an opening in a cover.