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:
Feb. 28, 1978
Filed:
Aug. 02, 1976
Applicant:
Inventors:
Assignees:
Canadian Patents and Development Limited, Ottawa, CA;
The Ontario Paper Company Ltd., St. Catharines, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162-5 ; 162-6 ; 162-7 ; 162-8 ;
Abstract
Waste paper, particularly newsprint, is treated to release adhering ink particles (e.g. pigment carbon) from the paper fibers, and the ink solids (and organic contaminants) are then preferentially collected on the surface of inserted non-soap solids which have an affinity for, and are of larger size than, the ink solids. The ink-coated solids can be removed from the system by suitable physical means such as hydrocyclones, screens or decantation.