Copy-invalidating document

Details Copy-invalidating document Copy-invalidating document

B - Operations, Transporting

42

D

B42D 15/10 (2006.01) B41M 3/14 (2006.01) G03C 5/08 (2006.01) G03G 21/04 (2006.01)

Patent

CA 2046057

COPY-INVALIDATING DOCUMENT ABSTRACT OF THE DISCLOSURE The text discloses for use in printing valuable documents an allover pattern of warning indicia which is merged by human sensory perception with its background but is distinguished and reproduced by xero- graphic copying as a result of the employment of two different screen values for the indicia and the back- ground which are respectively within and beyond the reproductive capability of the copier machine when used in the stated context. Adjunctively, document valida- ting indicia are also printable on such documents in a screen value beyond the reproductive capability of xerographic copiers at the lighter settings at which the lesser screen value used for said warning indicia or background will reproduce.

Affiliated with

Also associated with

Rating

Copy-invalidating document does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Copy-invalidating document, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copy-invalidating document will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1622105