Thermographic transfer elements and methods
US4828638A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Jun 24, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Transfer sheets and ribbons having a thin foundation carrying two superposed heat-transferable coatings. The base coating is cohesive, nonadhesive, substantially colorless and free of coloring matter and oil, and functions as a heat sink to insulate the top layer against excessive melting. The supercoating is more adhesive than the base coating, contains coloring matter and has excellent bonding properties for the base layer and also for receptive sheets including those having very smooth or glossy surfaces and relatively smooth closely-woven fabrics. Heat-transferred images are strongly adhered to the receptive sheet and produce no visible loss of clarity or sharpness if smudged by contact since the portion of the images exposed to contact is free of coloring matter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.