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. 26, 1980
Filed:
Feb. 12, 1979
Hans Schnell, Mengen, DE;
Escher Wyss GmbH, Ravensburg, Wurttemburg, DE;
Abstract
A method and apparatus for treating waste paper by pulping or defibering the paper in a stock pulper or slusher while infeeding water, wherein there are removed in succession, externally of the stock pulper, heavy weight particles, floatable substances and plastic foils. Thereafter, paper constituents which have incompletely defiberized are removed and further defibered in a special apparatus. The already defibered fibers are directly infed for further processing. The removal of the contaminants can be accomplished at a suspension density in the order of 1%, whereas the defibering or pulping of the waste paper in the stock pulper occurs at about 4%. The employed sorting apparatus is connected with the stock pulper, while dispensing with the use of a sieve or screen.