Apparatus for removing residues from parts of plastics processing machines
US4919161A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | May 19, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for removing plastic residues from parts of plastics processing machines includes a vessel which is closed in air tight manner by a lid and contains a liquid heat transfer fluid which is heated by heating elements to a temperature above the melting point of the plastic material adhering to the parts. For shortening the working cycle for heating and cooling the heat transfer fluid and also for shortening the cleaning process per se, the interior of the vessel cooperates with a pump which circulates the heat transfer fluid. In order to prevent a decomposition of the heat transfer fluid, inert gas is introduced into the space above the liquid level of the heat transfer fluid for displacing the prevailing air volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.