Fingerprint ink dispenser

Details Fingerprint ink dispenser Fingerprint ink dispenser

1993-03-10

1995-03-07

Jones, W. Gary

Coating apparatus

Body member printing type

118264, 118268, 118270, 106477, B41K 100, B05C 1100, C09C 148

Patent

active

053954440

ABSTRACT:
A fingerprint ink dispensing apparatus includes a ceramic disk positioned over an ink reservoir in the form, for example, of a felt pad. The ceramic disk has an average porosity of about 40% and an average pore size of about 5 microns. A colored pigment such as carbon black dispensed in a hydrocarbon oil is disposed in the reservoir with the concentration of the carbon black being about 22% by weight and the diameter of the carbon black particles falling within the range of 0.15 to 0.60 microns and the average size being about 0.35 microns.

REFERENCES:
patent: 2500612 (1950-03-01), Krogh
patent: 3075852 (1973-01-01), Bonora
patent: 3709524 (1973-01-01), McKee et al.
patent: 4226740 (1980-10-01), Worsham et al.
patent: 4262623 (1981-04-01), Smith, III et al.
patent: 4379178 (1983-04-01), Meadows et al.
Perrys Chemical Engineer's Handbook, Sixth Edition, McGraw-Hill Book Company, 1984.

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