Method for producing overhead transparencies having high color density images using a double sided image recording material
US5030538A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1990 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | May 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is described for forming a transparency containing images having high color density comprising the steps of: PA0 forming an imaging sheet, said imaging sheet comprising a substrate having a layer of microcapsules on the front surface and on the back surface thereof, of microcapsules containing an internal phase which undergoes a physical change upon exposure to actinic radiation, and a color forming agent which is capable of reacting with a developer-containing resing to form a visible image thereon; PA0 simultaneously image-wise exposing said microcapsules on said front and said back surfaces of said imaging sheet to actinic radiation; PA0 assembling said exposed imaging sheet between a pair of developer sheets wherein each of said developer sheets comprises a substrate having a layer of developer-containing resin on one surface thereof, said layer of developer-containing resin on each of said developer sheets contacting the adjacent surface of said imaging sheet; PA0 subjecting said assembly to a uniform rupturing and transfer force wherein said microcapsules are ruptured in an image-wise pattern and said color-forming agent contained in said ruptured capsules is transfe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.