Apparatus and method for liquifying thermoplastic material
US5814790A · kind A · utility
17Cited by
29References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1995 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Oct 4, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B13/022
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for liquifying and supplying thermoplastic material including a melting hopper having a plurality of separately controlled heating zones. The hopper is formed of thin, rolled metal having a relatively low heat conductivity, such as carbon steel. Heaters are located along the length of the hopper and are separately controlled by way of thermostats or temperature sensors, such that the heat applied in a nonuniform manner to the thermoplastic material in the hopper during various stages of the melting and dispensing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.