Recording apparatus

Patent metadata

Field	Value
Publication number	US-11319176-B2
Application number	US-202016774598-A
Country	US
Kind code	B2
Filing date	Jan 28, 2020
Priority date	Jan 30, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A recording apparatus includes a first medium transport path, a reverse path for reversing a surface of a medium, a third medium transport path that guides the medium to the reverse path, a first drive roller configured to rotate in a forward rotation direction that sends the medium toward a discharge port and in a reverse rotation direction opposite to the forward rotation direction, and a second drive roller provided in the third medium transport path and configured to rotate only in the forward rotation direction for sending the medium toward the reverse path, in which a transport force applied to the medium by the first drive roller when the first drive roller rotates in the forward rotation direction is stronger than a transport force applied to the medium by the second drive roller when the second drive roller rotates in the forward rotation direction.

First claim

What is claimed is:

1. A recording apparatus comprising:
a recording unit that performs recording on a medium;
a first medium transport path that is a medium transport path facing the recording unit configured to transport a medium in a first direction that is a medium transport direction when recording is performed on the medium and in a second direction opposite to the first direction;
a reverse path for reversing a surface of the medium;
a second medium transport path that has a first end coupled to the first medium transport path and a second end coupled to the reverse path such that reverse path is between the first and second medium transport paths and the second medium transport path guides the medium on which recording has been performed by the recording unit to the reverse path;
a third medium transport path that is positioned vertically below the first medium transport path and guides the medium on which recording has been performed by the recording unit to the reverse path, the third medium transport path being different from the second medium transport path;
a first roller pair that includes a first drive roller configured to rotate in a forward rotation direction in which the medium transported in the first direction on the first medium transport path is sent toward a discharge port and in a reverse rotation direction opposite to the forward rotation direction, and
a first driven roller that nips the medium with the first drive roller,
the first roller pair being positioned between the first medium transport path and the discharge port, discharging the medium from the discharge port by forward rotation of the first drive roller, and sending the medium to the third medium transport path by reverse rotation of the first drive roller;
a second roller pair that includes a second drive roller provided in the third medium transport path and configured to rotate only in the forward rotation direction for sending the medium toward the reverse path, and has a common drive source with the first drive roller, and
a second driven roller that nips the medium with the second drive roller, wherein
a transport force applied to the medium by the first roller pair when the first drive roller rotates in the forward rotation direction is stronger than a transport force applied to the medium by the second roller pair when the second drive roller rotates in the forward rotation direction.

2. The recording apparatus according to claim 1 , wherein
when the medium is jammed in a state where the medium is nipped between the first roller pair and the second roller pair, the first drive roller is driven in the forward rotation direction.

3. The recording apparatus according to claim 1 , wherein
when the medium is jammed, the first drive roller is driven in the forward rotation direction regardless of the position where the jam occurs.

4. The recording apparatus according to claim 1 , wherein
a nip force of the medium by the first roller pair is set to be stronger than a nip force of the medium by the second roller pair so that the transport force applied to the medium by the first roller pair when the first drive roller rotates in the forward rotation direction is set stronger than the transport force applied to the medium by the second roller pair when the second drive roller rotates in the forward rotation direction.

5. The recording apparatus according to claim 1 , wherein
a frictional force between the first roller pair and the medium is set higher than a frictional force between the second roller pair and the medium so that the transport force applied to the medium by the first roller pair when the first drive roller rotates in the forward rotation direction is set stronger than the transport force applied to the medium by the second roller pair when the second drive roller rotates in the forward rotation direction.

6. The recording apparatus according to claim 1 , wherein
a plurality of the first roller pairs and the second roller pairs are provided along a width direction that is a direction intersecting the medium transport direction, and the number of the first roller pairs is larger than the number of the second roller pairs so that the transport force applied to the medium by the first roller pair when the first drive roller rotates in the forward rotation direction is set stronger than the transport force applied to the medium by the second roller pair when the second drive roller rotates in the forward rotation direction.

7. The recording apparatus according to claim 1 , wherein
a contact range of the first drive roller to the medium is wider than a contact range of the second drive roller to the medium so that the transport force applied to the medium by the first roller pair when the first drive roller rotates in the forward rotation direction is set stronger than the transport force applied to the medium by the second roller pair when the second drive roller rotates in the forward rotation direction.

8. A recording apparatus comprising:
a recording unit that performs recording on a medium;
a first medium transport path that is a medium transport path facing the recording unit configured to transport a medium in a first direction that is a medium transport direction when recording is performed on the medium and in a second direction opposite to the first direction;
a reverse path for reversing a surface of the medium;
a second medium transport path that has a first end coupled to the first medium transport path and a second end coupled to the reverse path such that reverse path is between the first and second medium transport paths and the second medium transport path guides the medium on which recording has been performed by the recording unit to the reverse path;
a third medium transport path that is positioned vertically below the first medium transport path and guides the medium on which recording has been performed by the recording unit to the reverse path, the third medium transport path being different from the second medium transport path;
a first roller pair that includes a first drive roller configured to rotate in a forward rotation direction in which the medium transported in the first direction on the first medium transport path is sent toward a discharge port and in a reverse rotation direction opposite to the forward rotation direction, and
a first driven roller that nips the medium with the first drive roller;
the first roller pair being positioned between the first medium transport path and the discharge port, discharging the medium from the discharge port by forward rotation of the first drive roller, and sending the medium to the third medium transport path by reverse rotation of the first drive roller;
a second roller pair that includes a second drive roller provided in the third medium transport path and configured to rotate only in the forward rotation direction for sending the medium toward the reverse path, and has a common drive source with the first drive roller, and
a second driven roller that nips the medium with the second drive roller, wherein
in a case where a drive force when the first drive roller rotates in the forward rotation direction and a drive force when the second drive roller rotates in the forward rotation direction are simultaneously applied to one piece of medium, the medium is transported toward the discharge port by the drive force when the first drive roller rotates in the forward rotation direction.

Assignees

• Seiko Epson Corp

Inventors

• Komuro Shintaro
• Waki Shingo

Classifications

• B65H5/062 Primary

  between rollers or balls · CPC title

• B41J3/60

  for printing on both faces of the printing material · CPC title

• B65H7/06

  responsive to presence of faulty articles or incorrect separation or feed (B65H7/14 takes precedence) · CPC title

• B65H2301/33312

  forward reverse rollers pairs · CPC title

• B41J29/38

  Drives, motors, controls or automatic cut-off devices for the entire printing mechanism · CPC title