Patent · US Expired

Method for controlling the temperature of a layer in contact with a plastic material

US5234637A · kind A · utility

20Cited by

9References

5Claims

0Family size

Assignee

Krupp Corpoplast Maschinenbau GmbH · DE

Inventors

Wolfgang Reymann · Hamburg, DE
Wolf Jaksztat · Hamburg, DE

Key dates

Filing date	Sep 22, 1989
Grant date	Aug 10, 1993
Priority date	—
Expiry date	Sep 22, 2009

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S264/904
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A method and apparatus for thermically processing a material, such as a plastic material made of PET, in contact with a very thin heating layer that is provided on a body, such as a blow-mold. The intensity of current supplied to the heating layer is controlled as a function of the medium temperature in the heating layer to allow the heating layer to very rapidly heat up the plastic material contacting the heating layer. After switching off the heating current the plastic material is rapidly cooled down to the temperature of the body carrying the heating layer. This process may be applied to the heat setting process of blow-molded hollow articles made of PET.

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