RICOH COMPANY, LTD.; GOTO, Daisuke; YAMAMOTO, Satoshi; SAGISAKA, Toshiya; KATO, Takuji; TANO, Takanori; SHINODA, Masato; MATSUMOTO, Shinji; MOHRI, Masataka; YUTANI, Keiichiro Patent: WO2011/158953 A1, 2011 ; Location in patent: Page/Page column 172-173 ;