Patent · US Expired

Device for the relaxation of bulk articles containing drawn thermoplastics and for the selective softening of thermoplastics in a mixture flow for recycling

US5993052A · kind A · utility

0Cited by

11References

14Claims

0Family size

Assignee

Urban Stricker · DE

Inventors

Urban Stricker · Hilchenbach, DE
Martin Siebert · Calgary, CA
Klaus Stricker · Bietigheim-Bissingen, DE

Key dates

Filing date	Jul 25, 1997
Grant date	Nov 30, 1999
Priority date	—
Expiry date	Jul 25, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/62
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A worm or screw conveyor for the thermal treatment of a bulk containing thermoplastics and which has an elongated housing along which the bulk material is conveyed by a worm or screw. The worm or screw has a certain peripheral diameter and is rotatable about the worm axis to displace the bulk material therealong and an infrared heater is located in the housing centrally of the peripheral diameter for directly exposing bulk material in the housing to infrared radiant energy to heat the bulk material.

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