Thermal writing surface and method for making the same
US5514635A · kind A · utility
17Cited by
50References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1993 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Dec 29, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/282
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal writing device which changes color in response to induced temperature changes and a method for making such a device is disclosed. The thermal writing device includes a flexible substrate with low thermal mass for rapidly assimilating temperatures. Thermochromic inks which change color when subjected to temperature changes are printed upon or incorporated within this flexible substrate. The flexible substrate is disposed upon a support material having low thermal mass and poor heat conductance to facilitate rapid color transitions by the thermochromic inks with minimal expenditures of energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.