Incremental printing of symbolic information – Thermal marking apparatus or processes – With recording medium
Patent
1995-08-28
1996-10-29
Tran, Huan H.
Incremental printing of symbolic information
Thermal marking apparatus or processes
With recording medium
347262, 347264, B41M 528
Patent
active
055701248
ABSTRACT:
A magnetic recording layer is formed on one surface of a card-shaped base plate. A printing layer, for printing visible information such as "matters to be attended", is formed on the magnetic recording layer. A laser recording layer is formed on the other surface of the base plate. A visible image, which can be color-developed by radiation of a laser beam, can be recorded on the laser recording layer. The surface of the recording layer is coated with a transparent protection film, and a predetermined pattern is printed on the protection film. The laser recording layer includes a photothermic conversion material and a thermosensitive recording material. The photothermic conversion material has a major absorption wavelength corresponding to a major wavelength of the laser beam. A visible image can be recorded on the card by means of a laser beam without damaging a predetermined pattern on the protection film. Falsification of the visible image by means of a thermal pen can easily been discovered by checking a defect on the predetermined pattern. Therefore, falsification can be prevented.
Itoh Shin-ichi
Ohno Tadayoshi
Yamaguchi Takashi
Kabushiki Kaisha Toshiba
Tran Huan H.
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