Method of forming colored relief-and-indentation patterns and a thermal transfer foil
US5750241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31609
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A thermal transfer foil (4) on which the following layer are stacked is superimposed on one side of a base film (4a), approximately 12 .mu.m to 25 .mu.m thick, relative to a substrate (11), such as a metal plate, comprising a timepiece face plate: a separable processing layer (4b), approximately 0.02 .mu.m thick; a transparent protective coloring layer (4c), approximately 2 .mu.m thick; and a reflection layer (4d), approximately 0.03 .mu.m to 0.05 .mu.m thick; as well as a thermoplastic resin layer (4e). Then, the base film (4a) is peeled off the thermal transfer foil (4), and then heat-pressed using a mold (21). Fine relief-and-indentation patterns are provided on the pressing surface (22) of the mold (21), which are transferred to the protective coloring layer (4c), the reflection layer (4d), and the thermoplastic resin layer (4e).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.