US 7,525,681 B2
Printing apparatus and print-medium detection method
Yasushi Matsuoka, Kanagawa (Japan)
Assigned to Canon Kabushiki Kaisha, Tokyo (Japan)
Filed on Jul. 28, 2004, as Appl. No. 10/900,190.
Claims priority of application No. 2003-204821 (JP), filed on Jul. 31, 2003.
Prior Publication US 2005/0024663 A1, Feb. 03, 2005
Int. Cl. G06F 15/00 (2006.01); G06K 1/00 (2006.01)
U.S. Cl. 358—1.16  [358/1.12; 358/1.14; 358/1.15; 358/1.17] 10 Claims
OG exemplary drawing
 
1. A printing apparatus for printing on a print medium in accordance with information transmitted from a printer driver, comprising:
first and second print-medium feed means capable of feeding respective ones of print media of types that differ from each other;
print-medium detecting means for detecting the type of print medium fed by said first print-medium feed means;
storage means for storing information relating to the type of print medium that has been detected by said print-medium detecting means;
information transmitting means responsive to a request from the printer driver for transmitting the information relating to the type of print medium that has been detected by said print-medium detecting means;
changeover means for changing over to whichever of said first and second print-medium feed means is to be used in printing;
changeover detecting means for detecting the fact that said changeover means has been operated; and
detection information invalidating means for invalidating the information relating to the type of recording medium that has been stored in said storage means if the fact that said changeover means has been operated is detected by said changeover detecting means.