Fingerprinting system and method
First Claim
1. A method for forming fingerprints which comprisesproviding a first substrate having a first surface bearing a designated print image-forming area,said first substrate further bearing a localized coating of pressure-sensitive microcapsules containing a substantially colorless, image-forming reactant for forming an image of a print in said localized, image-forming area, said localized coating of said pressure-sensitive microcapsules being spaced apart from said designated print image-forming area, andan image-developing device comprising a second substrate, said second substrate being substantially transparent and having a first surface and a second surface, said first surface of said second substrate being coated with a dual-functional, reactive adhesive composition comprising a pressure-sensitive adhesive and an image-forming co-reactant capable of reacting with said image-forming reactant to form a visible, colored image in said designated print image-forming area,said second substrate being releasably attached to said first substrate and spaced apart from each of said designated print image-forming area and said localized coating of said pressure-sensitive microcapsules,contacting a member to be printed with said pressure-rupturable microcapsules under sufficient pressure from said member to rupture said microcapsules and release said image-forming reactant on said member to be printed, applying said coated member to be printed onto said print image-forming area to transfer said image-forming reactant to said print image-forming area to form an image of the print of said member to be printed in said print-image forming area, andseparating said second substrate from said first substrate and adhering said second substrate to said first substrate with said reactive adhesive composition superposed and in direct contact with said print-image forming area.
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0 Petitions
Accused Products
Abstract
A system for forming fingerprints comprises a substrate bearing a designated print image-forming area and a localized coating of pressure-sensitive microcapsules containing a substantially colorless, image-forming reactant in the form of a color former or color-developer for forming a latent or visible image of a fingerprint in the designated print image-forming area. An image-developing device comprising a transparent film coated with a dual-functional adhesive composition comprising a pressure-sensitive adhesive containing an image-forming co-reactant in the form of a color developer or color former is used to form a protected visible image in the designated print image-forming area when applied to the fingerprint image.
53 Citations
12 Claims
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1. A method for forming fingerprints which comprises
providing a first substrate having a first surface bearing a designated print image-forming area, said first substrate further bearing a localized coating of pressure-sensitive microcapsules containing a substantially colorless, image-forming reactant for forming an image of a print in said localized, image-forming area, said localized coating of said pressure-sensitive microcapsules being spaced apart from said designated print image-forming area, and an image-developing device comprising a second substrate, said second substrate being substantially transparent and having a first surface and a second surface, said first surface of said second substrate being coated with a dual-functional, reactive adhesive composition comprising a pressure-sensitive adhesive and an image-forming co-reactant capable of reacting with said image-forming reactant to form a visible, colored image in said designated print image-forming area, said second substrate being releasably attached to said first substrate and spaced apart from each of said designated print image-forming area and said localized coating of said pressure-sensitive microcapsules, contacting a member to be printed with said pressure-rupturable microcapsules under sufficient pressure from said member to rupture said microcapsules and release said image-forming reactant on said member to be printed, applying said coated member to be printed onto said print image-forming area to transfer said image-forming reactant to said print image-forming area to form an image of the print of said member to be printed in said print-image forming area, and separating said second substrate from said first substrate and adhering said second substrate to said first substrate with said reactive adhesive composition superposed and in direct contact with said print-image forming area.
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5. A method for forming prints, which comprises
providing a first substrate having a first surface substantially fully coated with a color developer and having a designated print image-forming area, said designated print image-forming area being on said color developer coating, said color developer coating bearing a localized coating of pressure-sensitive microcapsules containing a substantially colorless, color former, capable of reacting with said color developer to form a colored, visible image, said print-forming area and said localized coating of pressure-sensitive microcapsules being spaced apart, contacting a designated member to be printed with said pressure-sensitive microcapsules under sufficient pressure from said designated member to rupture said microcapsules and release said color former on said member to be printed to form a coated member to be printed, applying said coated member to be printed onto said print image-forming area and transferring said color former to said print image-forming area for reaction with said color developer to form a colored visible image of the print of said member to be printed in said print-image forming area.
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8. A self-provided imprinting system for forming fingerprints comprising
a first substrate having a first surface bearing a designated print image-forming area, said first substrate further bearing a localized coating of pressure-sensitive microcapsules containing a substantially colorless, image-forming reactant for forming an image of a print in said localized, print image-forming area, said localized coating of said pressure-sensitive microcapsules being spaced apart from said designated print image-forming area, and an image-developing device comprising a second substrate, said second substrate being substantially transparent and having a first surface and a second surface, said first surface of said second substrate being coated with a dual-functional, reactive adhesive composition comprising a pressure-sensitive adhesive and an image-forming co-reactant capable of reacting with said image-forming reactant to form a visible, colored image in said designated print image-forming area, said second substrate being releasably attached to said first substrate and spaced apart from each of said designated print image-forming area and said localized coating of said pressure-sensitive microcapsules.
Specification