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:
Mar. 28, 1995
Filed:
Sep. 09, 1992
Applicant:
Inventor:
Gerard Galland, Grenoble, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21B / ;
U.S. Cl.
CPC ...
162-8 ; 162-4 ;
Abstract
A two phase method for deinking printed waste paper having a mixture of printing inks is shown. The first phase is carried out in a neutral or slightly acid medium and the second phase in an alkaline medium. The first phase has disintegration, ink removal, and thickening steps. The second phase includes mixing and treating the thickened output from phase one with alkaline reagents, removal of any residual ink, and a second thickening. A third treatment of the removed ink and recycling of the media is also indicated.