Seiko Epson Corporation

Akihiko Noguchi

Tetsugo Ishida

Hiroshi Hamakawa

A conveyance device holds a sheet medium in a roll and includes a drive roller that feeds the sheet medium from the roll to a conveyance path; and a roll rotating unit that rotates the roll forward to convey the sheet medium toward the drive roller and in reverse to rewind the sheet medium and that has multiple drive modes with different speeds of rotation. A control unit controls driving the drive roller and the roll rotating unit, such that, when starting a reverse conveyance operation that rewinds the sheet medium, the control unit selects the drive mode to be used in the reverse conveyance operation based on a first conveyance distance, which is the distance the sheet medium is to be conveyed in the reverse conveyance operation, and the diameter of the roll stored as roll diameter information and as calculated after an immediately previous reverse conveyance operation.

Media conveyance device, printing device, and media conveyance method

A printer with a tractor unit driven by a DC motor and a printing control method that acquires accurate load information when continuous paper is loaded. The printer has a printheadthat can move in a primary scanning direction and has discharge nozzles that discharge liquid onto continuous paper, and a tractor unitthat is driven by a DC motor Mt and conveys continuous paper toward the printheadin a secondary scanning direction perpendicular to the primary scanning direction. The printerand printing method also have a load information acquisition unitthat, when continuous paper is loaded in the tractor unit, drives the tractor unitsat least two different constant conveyance speeds V, V, and acquires load information I, Ifor the DC motor Mt at the at least two different conveyance speeds.

Printer and printing method

A conveyance device has a roll rotating unit that rotates a roll of sheet medium forward and in reverse, and a conveyance path along which is an upstream roller and a downstream roller for conveying the medium and cooperate in a reverse and rewind operation. A control unit controls driving of the upstream roller, the downstream roller, and the roll rotating unit, such that, during the reverse and rewind operation, the control unit (i) drives the upstream roller and the roll rotating unit, (ii) stops driving the upstream roller while continuing to drive the roll rotating unit, first slack being created as a result of (i) or (ii), (iii) causes the medium to be nipped at the downstream roller, and (iv) drives the upstream roller while the medium is nipped at the downstream roller to create second slack.

Growing community of inventors

Nagano-ken, Japan

Akihiko Noguchi