Patent · US Expired

Apparatus for reprocessing old paper

US4328095A · kind A · utility

8Cited by

8References

14Claims

0Family size

Assignee

J.M. Voith GmbH · DE

Inventors

Herbert Ortner · Heidenheim, DE
Werner Cechovsky · Herbrechtingen, DE

Key dates

Filing date	Feb 9, 1981
Grant date	May 4, 1982
Priority date	—
Expiry date	Feb 9, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/64
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Apparatus is provided for reprocessing old paper in a series of flotation cells arranged one behind another, the suspension discharge 11 from the front cell being connected to the suspension inlet 8 of the following cell, each cell being provided with a stirring impeller 3, an air infeed device 9 and a foam outlet opening 12. The cells are provided by a substantially tubular body 1 which is horizontal or slopes gradually downward towards the rear, the tubular body being divided into a plurality of sections by partition walls 2 extending substantially vertically. Each section is provided with a suspension inlet 8, a suspension discharge outlet 11, a foam outlet opening 12, a stirring impeller 3, and an air infeed device 9.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.