Transfer imaging system
AssigneeThe Mead Corporation
InventorsFrederick W. Sanders, Gary F. Hillenbrand, Jonathan S. Arney, Richard F. Wright
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Abstract
A transfer imaging system is disclosed wherein images are formed by image-wise exposing a layer comprising a chromogenic material and pressure rupturable capsules containing, as an internal phase, a photosensitive composition. In a preferred embodiment, the chromogenic material is encapsulated with the photosensitive composition. Upon exposure and capsule rupture the chromogenic material is image-wise transferrable to a developer or copy sheet where the chromogenic material reacts with a developer to form an image. Preferred systems are sensitive to U.V. or blue light in the wavelength range of 380 to 480 nm.
Claims31
A transfer imaging system in which images are formed by image-wise reaction of one or more chromogenic materials and a developer, said system comprising:
- an imaging sheet comprising a first substrate,
- a chromogenic material,
- a radiation curable composition which undergoes an increase in viscosity upon exposure to actinic radiation,
- a coating on one surface of said first substrate comprising said chromogenic material and said radiation curable composition,
- said radiation curable composition being encapsulated in rupturable capsules as an internal phase, and
- a developer sheet comprising a second substrate and a developer material capable of reacting with said chromogenic material to form an image on one surface of said second substrate,
- wherein images are formed by image-wise exposing said coating to actinic radiation, and rupturing capsules in the image areas with said coating in facial contact with said developer sheet such that said internal phase is image-wise released from said ruptured capsules and there is image-wise transfer of said chromogenic material to said developer sheet and a patterned image-forming reaction occurs between said chromogenic material and said developer material.
A transfer imaging process comprising:
- image-wise exposing to actinic radiation an imaging sheet comprising a first substrate and a coating composition on one surface of said substrate, said coating composition including a chromogenic material and a radiation curable composition which undergoes an increase in viscosity upon exposure to actinic radiation, said radiation curable composition being encapsulated in rupturable capsules,
- rupturing capsules in the image areas, and
- transferring said chromogenic materials from the ruptured capsules to a sheet carrying a developer material on one surface such that there is a patterned reaction between said developer material and said chromogenic material which produces an image.
Dependencies are inferred from the claim text.