Article for use in forming a permanent image using a temporary m

Details Article for use in forming a permanent image using a temporary m Article for use in forming a permanent image using a temporary m

1993-01-25

1995-02-14

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428206, 4283044, 4283211, 156156, 156660, B32B 300

Patent

active

053894260

ABSTRACT:
A porous material having a top surface and a bottom surface, and a dye applied to the bottom surface of the porous material. The dye is soluble in a volatile imaging liquid contained in a suitable marker, such that when the volatile liquid contacts the top surface of the porous media, the volatile liquid penetrates the porous media, dissolves at least some of the dye to provide a dye solution with at least some of the dye solution migrating to the top surface, and evaporates leaving a permanently visible mark of dye residue on the top surface of the porous material.

REFERENCES:
patent: 2854350 (1958-09-01), Phillpotts
patent: 3506344 (1970-04-01), Thomas
patent: 3826499 (1974-07-01), Lenkoff
patent: 4299880 (1981-11-01), Arens
patent: 4374889 (1983-02-01), Arens
patent: 4418098 (1983-11-01), Maistrovich
patent: 4428321 (1984-01-01), Arens
patent: 4629330 (1986-12-01), Nichols
patent: 4729687 (1988-03-01), Arens
patent: 4877253 (1989-10-01), Arens

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