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In the electrochromic printing technology, it is necessary to apply to the paper a sensitizing solution right at the moment of printing or sometime before the printing action takes place.
English (United States)
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Use of Pressure Roller For Improved Paper Treatment In Electrochromic
In the electrochromic printing technology, it is necessary to apply to the
paper a sensitizing solution right at the moment of printing or sometime before
the printing action takes place.
The application of the electrolyte solution can be done by different means:
through a nebulizer, an air brush, or by capillary action using an impregnated
wick moving on the paper. The disclosed improvement (see figure) consists in
using a pressure roller running immediately behind the device which delivers the
liquid to the paper.
It has been found that the following advantages are obtained by
using this improvement:
- The solution penetrates the paper faster.
- It distributes the liquid better through paper pores.
- It eliminates irregularities due to paper fibers, and
achieves a more homogeneous and smooth surface for the
- Print quality and mark density are improved.
The incorporation of the pressure roller can be done as in the figure (wetting
device and print electrodes on same head) or added together with the wetting
device (when the print action takes place at a later time with relation to paper
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