Selective drum printer with axially divided multicolor ink roller

Claim 1

A printing device, comprising in combination: (a) a character type wheel provided with a plurality of character type rings, each of which is disposed along a shaft of said character type wheel, and in which a first character type symbol for printing a mark of a particular information among a plurality of informations to be printed is arranged on one of said plurality of character rings, and a second character type symbol is arranged on the remaining character type rings for printing said plurality of informations on a printing medium; (b) hammer means to strike said character type wheel; (c) ink roller means including, in coaxial disposition, a first color and a second ink roller portion impregnated with ink of a second color, said first ink roller portion facing the character type ring having said first character symbol thereon, and said second ink roller portion facing the remaining character type rings; (d) memory means capable of storing therein discriminating information to discriminate between said particular information among said plurality of informations, and one of said plurality of informations; (e) control means to read out the contents stored in said memory means, said control means being operative in response to the position of said first character type symbol on said character type wheel and a position of said second character type symbol; (f) a first memory to store therein said discriminating information read out of said memory means by said control means, when said particular information in said plurality of informations and said dicriminating information are stored in said memory means; (g) a second memory to store therein said particular information read out of said memory means by said control means, when said particular information in said plurality of informations and said discriminating information are stored in said memory means; and (h) drive means connected with said first and second memories, for striking said first character type symbol charged with said first color ink of said first ink roller portion on said ink roller means through said recording medium in response to said particular information stored in said first memory, and for striking said second character type symbol charged with said second color ink of said second ink roller portion on said ink roller means through said recording medium.