US 7,222,955 B2Granted

Both-side recording apparatus

AssigneeCanon Kabushiki Kaisha

InventorsTetsuyo Ohashi, Junichi Yoshikawa, Masahiro Taniguro, Koya Iwakura

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Abstract

The recording paper is transported to a paper inversion unit in such a manner that, when recording of a first surface of a recording paper is performed, the recording paper is transported to a position where a rear end of the recording paper is released from a pair of sheet transport rollers, the sheet transport roller and a pinch roller are released at the position, the recording paper is transported in a direction opposite to the direction in the first surface recording to the pair of sheet transport rollers by a pair of sheet discharge rollers, the sheet transport roller is pressed against the pinch roller again, and the transport of the recording paper in the reverse direction is further continued.

Claims14

Dependent claims

A both-side recording apparatus with a sheet transport mechanism having a sheet transport roller and a pinch roller pressed against the sheet transport roller, a sheet discharge roller arranged on the downstream side of the sheet transport roller in a transport direction, and a rotating body pressed against the sheet discharge roller, characterized in that a recording medium is transported to a position where a rear end of the recording medium is released from the sheet transport roller when a first surface is recorded at first, and then the recording medium is transported to a paper inversion unit in such a manner that the recording medium is transported by the sheet discharge roller toward a reverse direction while the sheet transport roller and the pinch roller are separated so that the recording medium moves between the sheet transport roller and the pinch roller without contacting with the pinch roller, and then the pinch roller is pressed into contact with the recording medium again to further continue the transport in the reverse direction.

A both-side recording apparatus including:

a first transport roller which transports a sheet of a recording medium toward a predetermined transport direction;
a pinch roller which cooperates with the first transport roller to support the sheet while sandwiching the sheet;
recording means for using a recording head discharging ink on the downstream side of the first transport roller in the transport direction to perform the recording to the sheet transported by the first transport roller;
a second transport roller which transports the sheet on the downstream side of the recording means in the transport direction;
separating means for separating the pinch roller from the first transport roller;
control means for controlling the first transport roller, the second transport roller, and the separating means;
a rotating body which cooperates with the second transport roller to support the sheet while sandwiching the sheet;
and
inversion means which inverts the sheet transported by the first transport roller toward the direction opposite to the transport direction and transports the sheet to the first transport roller,
characterized in that a sheet is transported to a position where a rear end of the sheet is released from the first transport roller when a first surface is recorded at first, and then the sheet is transported to the inversion means in such a manner that the sheet is transported by the second transport roller toward a reverse direction while the first transport roller and the pinch roller are separated so that the sheet moves between the first transport roller and the pinch roller without contacting with the pinch roller, and then the pinch roller is pressed into contact with the sheet again to further continue the transport in the reverse direction.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/824,411Filed 15 Apr 2004
Priority: JP 2003-11406218 Apr 2003
Published: US 2004/0207708 A121 Oct 2004
Granted: 29 May 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

B41J 13/025
Rollers: special roller holding or lifting means, e.g. for temporarily raising one roller of a pair of nipping rollers for inserting printing material
B41J 3/60
Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed: for printing on both faces of…
B41J
Typewriters