An example disclosed media processing device includes an image processing unit; a first optical registration sensor; and a second optical registration sensor spaced apart from the first optical registration sensor along a first axis by a first distance associated with a gap between media units on a web.

A registration system for a printing device and a method for controlling the same are disclosed. For example, the registration system includes a lead screw motor, a lead screw coupled to the lead screw motor, and a carriage coupled to the lead screw. The carriage includes two drive rollers, wherein each drive roller is coupled to a respective splined shaft coupled to a respective yoke, wherein the respective yoke is coupled to a drive pulley and a drive motor that is in a fixed position, wherein movement of the carriage causes the respective splined shaft of the two drive rollers to move guided by the respective yoke.

The theoretical position of a registration mark is automatically obtained by image processing on predetermined image data. A printing system including a printing apparatus capable of further performing coating printing on a substrate having undergone printing includes a generator that generates theoretical position data of a registration mark by performing image processing on registration image data assumed to contain a registration mark, an acquirer that acquires reading position data by reading the position of a registration mark printed in advance on conveyed paper, and a printing controller that compares the theoretical position data with the reading position data and corrects a position of coating printing based on the misregistration.

The theoretical position of a registration mark is automatically obtained by image processing on predetermined image data. A printing system including a printing apparatus capable of further performing coating printing on a substrate having undergone printing includes a generator that generates theoretical position data of a registration mark by performing image processing on registration image data assumed to contain a registration mark, an acquirer that acquires reading position data by reading the position of a registration mark printed in advance on conveyed paper, and a printing controller that compares the theoretical position data with the reading position data and corrects a position of coating printing based on the misregistration.

There is provided an intermediate unit including a transportation path along which a medium, on which printing has been performed by a printing unit that performs printing on the medium by using liquid, is transported to a post processing unit that performs post processing on the medium. The transportation path includes first and second inversion paths in which the medium is inverted upside down, respectively, the second inversion path being provided with a decurling unit that corrects curl of the medium, the first inversion path being not provided with the decurling unit, the first and second inversion paths being selectively used to invert the medium upside down according to printing data for the medium.

There is provided an intermediate unit including a transportation path along which a medium, on which printing has been performed by a printing unit that performs printing on the medium by using liquid, is transported to a post processing unit that performs post processing on the medium. The transportation path includes first and second inversion paths in which the medium is inverted upside down, respectively, the second inversion path being provided with a decurling unit that corrects curl of the medium, the first inversion path being not provided with the decurling unit, the first and second inversion paths being selectively used to invert the medium upside down according to printing data for the medium.

In a method of operating an ink jet card printer, which includes a transport belt, a print unit including an ink jet print head, a sensor and a gantry, a card is loaded onto the transport belt along a processing axis using an exposed surface of the transport belt. The sensor and the ink jet print head are moved relative to the card using the gantry. A current position of the card is detected using the sensor. An image is printed to the card using the ink jet print head when the detected current position of the card indicates that the card is supported on the transport belt in a print position. Printing is interrupted when the detected current position of the card indicates that the card is not in the print position.

In a method of operating an ink jet card printer, which includes a transport belt, a print unit including an ink jet print head, a sensor and a gantry, a card is loaded onto the transport belt along a processing axis using an exposed surface of the transport belt. The sensor and the ink jet print head are moved relative to the card using the gantry. A current position of the card is detected using the sensor. An image is printed to the card using the ink jet print head when the detected current position of the card indicates that the card is supported on the transport belt in a print position. Printing is interrupted when the detected current position of the card indicates that the card is not in the print position.

An ink jet card printer includes an ink jet print head, a gantry, and a card feeder. The ink jet print head is configured to perform a print operation on a card supported in a print position along a processing axis. The gantry is configured to move the print head through a print zone. The card feeder includes a feeder frame, a first pinch roller pair, and a lift mechanism. The first pinch roller pair is supported by the feeder frame and is configured to feed individual cards along a card feed axis. The lift mechanism is configured to move the feeder frame and the first pinch roller pair between a lowered position, in which the card feeder is displaced from the print zone, and a raised position, in which at least a portion of the card feeder extends into the print zone.

In a method of operating an ink jet card printer, which includes a transport belt, a print unit including an ink jet print head, a sensor and a gantry, a card is loaded onto the transport belt along a processing axis using an exposed surface of the transport belt. The sensor and the ink jet print head are moved relative to the card using the gantry. A current position of the card is detected using the sensor. An image is printed to the card using the ink jet print head when the detected current position of the card indicates that the card is supported on the transport belt in a print position. Printing is interrupted when the detected current position of the card indicates that the card is not in the print position.