A sheet stacker for preventing missing pages and a printer using the sheet stacker

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(11)

EP 0 859 289 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	14.10.1998 Bulletin 1998/42

(43)	Date of publication A2:
	19.08.1998 Bulletin 1998/34

(21)	Application number: 97307961.9

(22)	Date of filing: 07.10.1997

(51)	International Patent Classification (IPC)⁶: G03G 15/00

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

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Priority:

14.02.1997 JP 30505/97

(71)	Applicant: FUJITSU LIMITED
	Kawasaki-shi, Kanagawa 211-8588 (JP)

(72)	Inventors:
	Fujita, Nobuo Nakahara-ku, Kawasaki-shi, Kanagawa 211 (JP) Iwawaki, Shoki Nakahara-ku, Kawasaki-shi, Kanagawa 211 (JP)

(74)	Representative: Godsill, John Kenneth et al
	Haseltine Lake & Co., Imperial House, 15-19 Kingsway London WC2B 6UD London WC2B 6UD (GB)

(54)	A sheet stacker for preventing missing pages and a printer using the sheet stacker

(57) A sheet stacker prevents a sheet remaining in a reversing path from falling inside the sheet stacker when an initializing operation is performed. The sheet stacker is used with a printer (11) ejecting a sheet having a printed surface. A sheet reversing mechanism (51) reverses the sheet by switching the sheet ejected from the printer (11) from a first side to a second side. The sheet is stacked on a table (52) with the printed surface facing downwardly. In the sheet reversing mechanism, a receiving path (62) receives the sheet ejected from the printer (11). A reversing path (63) is connected to the receiving path (62), and an ejecting path (64) guides the sheet ejected from the reversing path (63) to the table (52). The sheet stacker is further provided with a sheet purge table (54) and a sheet purge path (53) provided between a lower end of the reversing path (63) and the sheet purge table (54). A sheet remaining inside the sheet reversing mechanism is ejected onto the sheet purge table (54) through the sheet purge path (53) by an initializing operation performed after recovery from an abnormality of the printer (11).

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