Patent · US Expired

Process for the treatment of wastepaper using drum soaker

US5334285A · kind A · utility

2Cited by

4References

6Claims

0Family size

Assignee

J.M. Voith GmbH · DE

Inventors

Herbert Ortner · Heidenheim, DE
Theodor Bahr · Heidenheim, DE
Walter Musselmann · Heidenheim, DE

Key dates

Filing date	May 21, 1993
Grant date	Aug 2, 1994
Priority date	—
Expiry date	May 21, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/64
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention concerns a process for the treatment of wastepaper, carried out for the most at a high consistency of at least 13% in the first stages, beginning the dissolution (soaking) and including a coarse sorting stage. The invention is characterized in that in the case of wastepaper containing a share of at least 40% of deinking wastepaper provided with printing inks the three first process stages, namely in this order of soaking, coarse cleaning and the further extensive dissolution of the wastepaper, take place at a considerable reduction of the wastepaper shreds to the usual speck size at a consistency of at least 13%, and the soaking under considerable addition of dissolving chemicals, and that the wastepaper including essentially all heavy contaminations, such as part of wood, glass, plastic or metal contained in the wastepaper, including pieces of metal straps of the wastepaper bales, is fed to the process.

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