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US 4,727,008 AGranted
Dye-forming electrically activatable recording element and process
AssigneeEastman Kodak Company
InventorsMark Lelental, Scott A. Brownstein
Life of this patent
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AssigneeEastman Kodak Company
InventorsMark Lelental, Scott A. Brownstein
Estimating the term…
A dye-forming electrically activatable recording (EAR) element which is capable of forming at least two dye images comprises an electrically conductive support bearing on one side of the support at least a dye-forming layer (A) responsive to negative polarity charge exposure and at least one dye-forming layer (B) responsive to positive polarity charge exposure and, optionally, other dye-forming layers. A multicolor dye image can be formed in the dye-forming electrically activatable recording element by multistep imagewise charge exposure in which the exposure steps are reversed in electrical polarity at each step. The reversal of polarity of exposure at differing charge density levels enables formation of a dye image in at least one layer without formation of a dye image in another layer. Processing of the exposed dye-forming electrically activatable recording element is carried out by thermal processing or by means of processing solutions or baths.
In a dye-forming electrically activatable recording process in which a multilayer dye-forming electrically activatable recording element is imagewise exposed to electrical charge to form a developable image and then processed to form a dye image,
A dye-forming electrically activatable recording process for producing a dye image in a dye-forming electrically activatable recording element comprising an electrically conductive support bearing at least one dye-forming electrically activatable recording layer (A) and at least one dye-forming electrically activatable recording layer (B), said process comprising the steps:
In a process of forming a dye image in a dye-forming electrically activatable recording element comprising at least three electrically activatable image recording layers (A), (B) and (C) capable of forming dye images,
A process of forming a dye image in a dye-forming electrically activatable recording element comprising an electrically conductive support bearing on the first side of said support in sequence
In a dye-forming electrothermographic recording process in which a multilayer dye-forming electrothermographic element is imagewise exposed to electrical charge to form a developable image and then heated to form a dye image, the steps comprising
A dye-forming electrothermographic recording process for producing a dye image in a dye-forming electrothermographic element comprising an electrically conductive support bearing at least one dye-forming electrothermographic recording layer (A) and at least one dye-forming electrothermographic layer (B),
In a process of forming a dye image in a dye-forming electrothermographic element comprising at least three electrothermographic layers (A), (B) and (C) capable of forming dye images,
A dye-forming electrothermographic process of forming a dye image in a dye-forming electrothermographic element comprising an electrically conductive support bearing on the first side of said support in sequence
A dye-forming electrothermographic element comprising at least two electrothermographic recording layers (A) and (B) capable of forming dye images wherein at least layer (A) is separated from layer (B) by a polymeric acid barrier layer.
A dye-forming electrothermographic element comprising an electrically conductive support bearing on the first side of said support, in sequence,
Dependencies are inferred from the claim text.