Chromogenic copy system
OwnerAnthony E. Vassiliadesinventor
Life of this patent
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Abstract
A pressure-sensitive chromogenic copy system utilizing a color developer capable of reacting with a chromogen to form a color image, said color developer comprising sulfur, sulfonyl, or sulfone derivatives of substituted aromatic carboxylic acids, preferably hydroxybenzoic acids.
Claims9
A pressure-sensitive chromogenic copy system comprising a transfer sheet having on at least a portion of at least one surface thereof a color developer capable of reacting with a chromogen to form a color image, said color developer comprising a compound having the general formula:
- ##STR2## wherein R and R' is each a hydrogen atom, a C.sub.1 -C.sub.20 alkyl radical, or an aryl group, X is hydrogen or a metallic ion, .SIGMA. is a sulfur atom, or a sulfonyl or sulfone radical, n is 0 or an integer of 1 to 20, and m is an integer of 1 to 20.
A receptor sheet for a pressure-sensitive chromogenic copy system comprising a substrate having on at least a portion of one surface thereof a color developer capable of reacting with a chromogen to form color images, said color developer comprising a compound having the general formula:
- ##STR4## wherein R and R' is each a hydrogen atom, a C.sub.1 -C.sub.20 alkyl radical, or an aryl group, X is hydrogen or a metallic ion, .SIGMA. is a sulfur atom, or a sulfonyl or sulfone radical, n is 0 or an integer of 1 to 20, and m is an integer of 1 to 20.
A coated front and back sheet for a pressure-sensitive chromogenic copy system comprising a substrate having on at least a portion of one surface thereof a coating of chromogen-containing microcapsules and on at least a portion of the other surface thereof a coating of a color developer capable of reacting with said chromogen to form color images, said color developer comprising a compound having the general formula:
- ##STR6## wherein R and R' is each a hydrogen atom, a C.sub.1 -C.sub.20 alkyl radical, or an aryl group, X is hydrogen or a metallic ion, .SIGMA. is a sulfur atom, or a sulfonyl or sulfone radical, n is 0 or an integer of 1 to 20, and m is an integer of 1 to 20.
Dependencies are inferred from the claim text.