Printing – Processes – Specific ink
Patent
1997-09-29
1999-10-26
Eickholt, Eugene H.
Printing
Processes
Specific ink
283 95, 503201, 503218, 503213, 503226, B41F 3100
Patent
active
059708751
ABSTRACT:
A tamper evident document for use with an impact printer having an inked ribbon, which document comprises, a substrate having a first surface and a second surface, the first surface being adapted to receive a principal visible colored image by transfer from the inked ribbon of an impact printer and being substantially free from color forming compositions which react to form visible colored images, the second surface being coated with a self-contained pressure-sensitive chromogenic composition capable of reacting to form a visible colored mirror image on the second surface, the substrate being sufficiently translucent such that the second visible colored mirror image could be viewed from the first surface, if said second visible image were not totally blocked by said principal visible image, so as to determine whether the principal and second visible colored mirror images are in register.
REFERENCES:
patent: 4317743 (1982-03-01), Chang
patent: 4448445 (1984-05-01), Chang et al.
patent: 4846502 (1989-07-01), Chang et al.
patent: 5029901 (1991-07-01), Dutson et al.
patent: 5033773 (1991-07-01), Brunea et al.
patent: 5209513 (1993-05-01), Batelli et al.
patent: 5250492 (1993-10-01), Outson et al.
patent: 5284816 (1994-02-01), Stephenson
patent: 5292283 (1994-03-01), Koper et al.
patent: 5295906 (1994-03-01), Skees
patent: 5309196 (1994-05-01), Sanders
patent: 5325721 (1994-07-01), Pendergrass, Jr.
patent: 5395138 (1995-03-01), Chang
patent: 5575214 (1996-11-01), Braunstein et al.
patent: 5605873 (1997-02-01), Chang
patent: B14425386 (1988-03-01), Chang
Research Disclosure (No. 18747), Nov. 1979, pp. 638-639.
Chang John C. H.
Hoffmann Donald J.
Eickholt Eugene H.
Wallace Computer Services Inc.
LandOfFree
Pressure-sensitive tamper evident system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure-sensitive tamper evident system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-sensitive tamper evident system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-751824