Incremental printing of symbolic information – Thermal marking apparatus or processes
Patent
1995-12-26
1996-09-24
Tran, Huan H.
Incremental printing of symbolic information
Thermal marking apparatus or processes
347186, B41J 232
Patent
active
055595456
ABSTRACT:
A perforating device used by a stamp unit for perforating a desired character string pattern on a print face portion of the stamp unit which incorporates an ink impregnation member covered with heat sensitive stencil paper including a thermoplastic film. The perforating device includes: a thermal head having a plurality of heating elements selectively powered and heated to reach a first temperature to melt the thermoplastic film and perforate the heat sensitive stencil paper based on the character string pattern. A moving mechanism moves the thermal head and the print face portion relative to each other after the thermal head has performed the perforation. A head driving circuit powers the heating elements to reach a second temperature lower than the first temperature while the thermal head and the print face portion are being moved by the moving mechanism relative to each other.
REFERENCES:
patent: 5019836 (1991-05-01), Iwata et al.
patent: 5184549 (1993-02-01), Imamaki et al.
patent: 5251567 (1993-10-01), Fuwa
patent: 5253581 (1993-10-01), Miki et al.
Brother Kogyo Kabushiki Kaisha
Tran Huan H.
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