Apparatus for security printing using toner particles
First Claim
1. A single pass 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 a plurality of printing stations,ii) at least two printing stations for image-wise depositing toner particles on said substrate in accordance with said predetermined format of said variable data,iii) means for non-contact fusing said toner particles to said substrate by radiant heat, thereby forming a fused toner image, whereina) said apparatus further includes means for introducing security features in said document andb) said means for fusing said toner particles to said substrate includes means for heating and melting said toner particles whereby between said melting toner particles and said substrate a contact angle of at most 900°
is formed and leave at most 25 mg/m2 of an external releasing agent on said fused toner image.
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Accused Products
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° is formed and leave at most 25 mg/m2 of an external releasing agent on the fused toner image.
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Citations
13 Claims
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1. A single pass apparatus for security printing of a document on a substrate, having a first and second side, comprising:
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i) means for feeding variable data in a predetermined digital format to a plurality of printing stations, ii) at least two printing stations for image-wise depositing toner particles on said substrate in accordance with said predetermined format of said variable data, iii) means for non-contact fusing said toner particles to said substrate by radiant heat, thereby forming a fused toner image, wherein a) said apparatus further includes means for introducing security features in said document and b) said means for fusing said toner particles to said substrate includes means for heating and melting said toner particles whereby between said melting toner particles and said substrate a contact angle of at most 900°
is formed and leave at most 25 mg/m2 of an external releasing agent on said fused toner image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. A method for security printing of a document a substrate, having a first and second side, comprising the steps of:
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i) feeding variable data in a predetermined digital format to at least two printing stations, ii) providing at least two different types of toner particles, iii) image-wise depositing said different types of toner particles on at least one side of said substrate, iv) introducing security features in said document, v) heating and melting said toner particles in non-contact mode by radiation heat such that said melting toner particles are fused to said substrate and that between said melting toner particles and said substrate a contact angle of at most 900°
is formed,vi) depositing an amount of external releasing agent on top of said fused toner particles of at most 25 mg/m2.
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Specification