Compact fingerprinting system
First Claim
1. An indentification system comprising in combination:
- an applicator for applying an aqueous color-forming composition to a body part and a card substrate containing an image-forming portion impregnated with developer for said color-forming compound;
said applicator comprising a vapor-proof enclosure containing a porous pad impregnated with a color-forming composition comprising a solution of a color-forming, water-soluble metal salt compound, andsaid image-forming portion of the card substrate impregnated with a developer comprising a mixture of at least one water-soluble developer compound selected from the group consisting of a polyhydroxy aromatic compound, a quinolinol compound and mixtures thereof with 1 to 10 parts by weight of a viscosity control agent consisting essentially of a water-soluble, dibasic organic acid containing from 8 to 18 carbon atoms.
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Accused Products
Abstract
A compact fingerprinting system includes an applicator comprising a sealed packet (13) containing a porous pad (12) impregnated with a solution of water-soluble, color-forming, marking compound, such as iron chloride having a controlled, optimum water content. A print of a body part, such as a finger, is formed by opening the packet (60) and wiping the distal portion of a finger (76) on the pad (62), such as a folded towelette to form a non-visible, latent image pattern. The pattern is transferred to a card (40) which can contain an area (44) impregnated with developer for the marking compound. The developer reacts with the pattern to form a dark, distinct, permanent image (84). The card (40) and packet (13) can be enclosed in an envelope (64) to form a low profile, lightweight, mailable, self-administered fingerprinting system.
38 Citations
16 Claims
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1. An indentification system comprising in combination:
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an applicator for applying an aqueous color-forming composition to a body part and a card substrate containing an image-forming portion impregnated with developer for said color-forming compound; said applicator comprising a vapor-proof enclosure containing a porous pad impregnated with a color-forming composition comprising a solution of a color-forming, water-soluble metal salt compound, and said image-forming portion of the card substrate impregnated with a developer comprising a mixture of at least one water-soluble developer compound selected from the group consisting of a polyhydroxy aromatic compound, a quinolinol compound and mixtures thereof with 1 to 10 parts by weight of a viscosity control agent consisting essentially of a water-soluble, dibasic organic acid containing from 8 to 18 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification