Fingerprint ink dispenser
US5395444A · kind A · utility
11Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Mar 10, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41K1/52
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.