Fitzpatrick, Cella, Harper & Scinto
Printer controller apparatus interfacing with external data sources
 A printing unit allows connection of two or more signal sources, thereby improving the efficiency of use of the printing unit. For this purpose the printing unit or printer has a first image signal source for supplying a first image signal. The first image signal source is connectable with a second image signal source for generating a different image signal, and has a control unit for controlling the function of the second signal source. 
Canon Kabushiki Kaisha
Y G G
Y10S G06K G06K
additional additional inventional
Kunio
Okada