Document reading device and image forming device

A document reading device comprising:

• a conveyer configured to convey a document sheet using a single drive source;
• a reader configured to read an image of the document sheet which is being conveyed through a reading position by the conveyer;
• and
• a controller configured to stop conveyance by the conveyer when a read request for a first document sheet, which is being conveyed upstream of the reading position in a document sheet conveyance direction, has not been received,
• wherein in a case where a trailing edge of a second document sheet, which is being conveyed downstream of the first document sheet, has passed through the reading position at a timing when the conveyance by the conveyer is stopped because of the read request having not been received, the controller validates the image read by the reader from the second document sheet and stops the first document sheet at a first stop position located upstream of the reading position, and
• wherein in a case where the trailing edge of the second document sheet has not passed through the reading position when the conveyance by the conveyer is stopped because of the read request having not been received and the trailing edge of the second document sheet would pass through the reading position if the first document sheet is conveyed to a second stop position located between the first stop position and the reading position, the controller validates the image read by the reader from the second document sheet and stops the first document sheet at the second stop position.

A document reading device that can execute a copy mode which an image of a document sheet is read to print the read image on a sheet and a margin area which is not printed in the read image is formed and a scan mode which an image of a document sheet is read to transmit the read image to an external device, the document reading device comprising:

• a conveyer configured to convey the document sheet using a single drive source;
• a reader configured to read the image of the document sheet which is being conveyed through a reading position by the conveyer;
• and
• a controller configured to stop conveyance by the conveyer when a read request for a first document sheet, which is being conveyed upstream of the reading position in a document sheet conveyance direction, has not been received,
• wherein while the document reading device is operating on the scan mode, the controller invalidates the image of a second document sheet, which is being conveyed downstream of the first document sheet, read by the reader in a case where a trailing edge of the second document sheet has not passed through the reading position at a timing when the conveyance by the conveyer is stopped because of the read request having not been received, and the controller validates the image of the second document sheet read by the reader in a case where the trailing edge of the second document sheet has passed through the reading position when the conveyance by the conveyer is stopped because of the read request having not been received, and
• wherein while the document reading device is operating on the copy mode, the controller invalidates the image of the second document sheet read by the reader in a case where the trailing edge of the second document sheet, which is being conveyed downstream of the first document sheet, has not passed through a predetermined position located upstream of the reading position by a predetermined distance at the timing when the conveyance by the conveyer is stopped because of the read request having not received, and the controller validates the image of the second document sheet read by the reader in a case where the trailing edge of the second document sheet has passed through the predetermined position when the conveyance by the conveyer is stopped because of the read request having not received, the predetermined distance being a distance corresponding to the margin area at the trailing edge of the second document sheet.

An image forming device comprising:

• a conveyer configured to convey a document sheet using a single drive source;
• a reader configured to read an image of the document sheet which is being conveyed through the reading position by the conveyer;
• a printer configured to print the image of the document sheet read by the reader onto a recording sheet;
• and a controller configured to stop conveyance by the
• conveyer in a case where a read request for a first document sheet, which is being conveyed upstream of the reading position in a document sheet conveyance direction, has not been received;
• wherein the controller invalidates the image read from a second document sheet in a case where the trailing edge of the second document sheet, which is being conveyed downstream of the first document sheet, has not passed through the reading position at a timing when the conveyance by the conveyer is stopped because of the read request having not received, and validate the image read from the second document sheet in a case where the trailing edge of the second document sheet has passed through the reading position when the conveyance by the conveyer is stopped because of the read request having not received.