Apparatus for security printing using toner particles
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United States of America Patent
Stats
-
Oct 20, 1998
Grant Date -
N/A
app pub date -
Jul 8, 1997
filing date -
Jul 11, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for security printing of a document on a substrate, having a first and second side, comprising: i) means for feeding variable data in a predetermined digital format to printing stations, ii) at least two printing stations, for image-wise depositing, in accordance to the predetermined format of the variable data, toner particles on the substrate, iii) means for fusing the toner particles to the substrate, to form a fused toner image, characterized in that a) the apparatus comprises means for introducing security features in the document and b) the means for fusing the toner particles to the substrate comprise means for heating and melting the toner particles such that between the melting toner particles and the substrate a contact angle of at most 90.degree. is formed and leave at most 25 mg/m.sup.2 of an external releasing agent on the fused toner image.
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