Patent · US Expired

Process for cleaning comminuted plastic material

US4073661A · kind A · utility

30Cited by

4References

10Claims

0Family size

Assignee

Maschinenfabrik Buckau R. Wolf Aktiengesellschaft

Inventors

Heinrich Buzga · Grevenbroich, DE
Werner Steprath · Dormagen, DE
Kurt Pause · Eutin, DE

Key dates

Filing date	Jun 10, 1976
Grant date	Feb 14, 1978
Priority date	—
Expiry date	Jun 10, 1996

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S264/911
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A continuous process for cleaning and preparing grossly soiled products of plastic material, such as sheets, bands, sacks or the like for subsequent re-use, in which the plastic material is comminuted after removing rough foreign objects therefrom, whereafter the comminuted plastic material is fed into a washing solution having a greater specific weight than the plastic material and subjected together with the washing solution in a washing zone to turbulence, transferred to a turbulence-free zone containing washing solution by passage under a submerged edge of a partition submerged in the washing solution and separating the washing zone from the turbulence--free zone, and thereafter subjected first to mechanical and then to a thermal drying operation.

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