Method of manufacturing an object of thermoplastics material having a decorative design
US4931248A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Feb 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/14721
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method includes printing a decorative design on a surface of a suitable support using a transferable ink; introducing this support into an injection mould in such a manner that, during injection, its surface carrying the decorative design faces the inside of the mould; and injecting into the mould a heated thermoplastics material for forming an object. To prevent the printed design from being deformed by molten thermoplastics material during injection, the method further includes introducing a separate film into the mould, before injection, in such a manner that it is applied against the surface of the support printed with the decorative design. The film is made of a material which bonds with the injected thermoplastics material and receives and retains the ink forming the decorative design, which separates from the support and deposits on the film during injection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.