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:
Jan. 06, 2015
Filed:
Jan. 24, 2012
Shisei Goto, Tokyo, JP;
Takaharu Noda, Tokyo, JP;
Hiroki Ohtake, Tokyo, JP;
Tatsumi Hosaka, Hokkaido, JP;
Shisei Goto, Tokyo, JP;
Takaharu Noda, Tokyo, JP;
Hiroki Ohtake, Tokyo, JP;
Tatsumi Hosaka, Hokkaido, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Aikawa Iron Works Co., Ltd., Shizuoka, JP;
Abstract
The purpose of the present invention is to provide technology for regenerating pulp having high quality with compact pulp regenerating equipment and less energy. In the pulp regenerating method of the present invention, pulp slurry containing 1.5 wt % or more of a solid component including waste paper pulp is separated into a long fiber fraction and a short fiber fraction by using an outward type slit screen including an opening portion having a slit width in the range of 0.1 mm to 0.3 mm. The solid component ratio of the long fiber fraction and the short fiber fraction is in the range from 10:90 to 60:40, and the difference in Canadian Standard Freeness of the long fiber fraction and the short fiber fraction is in the range of 100 ml to 300 ml.