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:
Aug. 18, 1987
Filed:
Apr. 12, 1982
Applicant:
Inventor:
Frey Sundman, Karhula, FI;
Assignee:
A. Ahlstrom Osakeyhtio, Noormarkku, FI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241 793 ; 162251 ; 241 62 ; 241 70 ;
Abstract
An apparatus for fiberizing and screening of fibrous material, which comprises of a rotating drum (1) the drum wall (2) of which consists of a non-perforated (7) and a perforated (8) part. The non-perforated part in the inlet end of the drum is separated from the perforated part in the outlet end of the drum by means of a partition wall (9) having an opening (10). The height (h) of the partition wall varies so that a periodical overflow is achieved when the drum rotates.