The disclosed embodiments include a printer having a printing area configured to receive distinct mediums, and printer heads arranged relative to the printing area. The printer heads are collectively configured to print independent images onto the distinct mediums. The printer heads include at least one shared printer head configured to simultaneously print portions of the independent images onto each of two adjacent mediums.

The disclosed embodiments include a printer having a printing area configured to receive distinct mediums, and printer heads arranged relative to the printing area. The printer heads are collectively configured to print independent images onto the distinct mediums. The printer heads include at least one shared printer head configured to simultaneously print portions of the independent images onto each of two adjacent mediums.

A printing apparatus includes: a transport unit that arranges and is able to transport a plurality of continuous paper pieces in parallel; a printing unit of which a print head reciprocates in a direction intersecting with a transport direction of the plurality of continuous paper pieces and which is configured to be able to perform printing on the plurality of continuous paper pieces separately; a reception unit that is able to receive a plurality of print jobs; and a control unit that controls operations of the transport unit and the printing unit based on the plurality of print jobs received by the reception unit.

A printing apparatus includes: a transport unit that arranges and is able to transport a plurality of continuous paper pieces in parallel; a printing unit of which a print head reciprocates in a direction intersecting with a transport direction of the plurality of continuous paper pieces and which is configured to be able to perform printing on the plurality of continuous paper pieces separately; a reception unit that is able to receive a plurality of print jobs; and a control unit that controls operations of the transport unit and the printing unit based on the plurality of print jobs received by the reception unit.

An image forming apparatus includes a housing, a feeding tray inserted into and pulled out from the housing, an image forming unit, and first and second guide members. The feeding tray includes a first accommodation part in which a roll body having a configuration where a sheet-shaped medium is rolled in a roll shape is accommodated and a second accommodation part in which stacked sheet-shaped media are accommodated. The first guide member guides a sheet-shaped medium to a conveying path. The second guide member guides a roll medium unrolled from the roll body to the conveying path. The second guide member is movable between a guide position for guiding the roll medium to the conveying path, and a retreat position further distant from the first guide member than the guide position and where the second guide member does not interfere with a sheet-shaped medium accommodated in the second accommodation part.

An image forming apparatus includes a housing, a feeding tray inserted into and pulled out from the housing, an image forming unit, and first and second guide members. The feeding tray includes a first accommodation part in which a roll body having a configuration where a sheet-shaped medium is rolled in a roll shape is accommodated and a second accommodation part in which stacked sheet-shaped media are accommodated. The first guide member guides a sheet-shaped medium to a conveying path. The second guide member guides a roll medium unrolled from the roll body to the conveying path. The second guide member is movable between a guide position for guiding the roll medium to the conveying path, and a retreat position further distant from the first guide member than the guide position and where the second guide member does not interfere with a sheet-shaped medium accommodated in the second accommodation part.

A synchronous single/double-sided digital inkjet printer comprises a rack, feeding rollers (2, 23), take-up rollers (3, 22), two groups of inkjet printing carriages (9, 16) and driving rollers (5, 20). The two groups of inkjet printing carriages (9, 16) respectively make reciprocating motion on the two groups of track beams (10, 15) mounted on the rack, and are provided with print heads (8, 17). The lower parts of the two groups of inkjet printing carriages (9, 16) are provided with inkjet printing platforms (7, 19) mounted on the rack, and the lower parts of the two inkjet printing carriages (9, 16) are provided with the driving rollers (5, 20). The two driving rollers (5, 20) are driven to rotate in the opposite direction respectively by two independent driving devices mounted on the rack. A printing material winding method is applied to the inkjet printer. The inkjet printer and the method can not only accurately print on two sides synchronously, but also perform a single-sided printing on two pieces of printing materials by the same printer at the same time, thus realizing multi purposes by one machine.

A synchronous single/double-sided digital inkjet printer comprises a rack, feeding rollers (2, 23), take-up rollers (3, 22), two groups of inkjet printing carriages (9, 16) and driving rollers (5, 20). The two groups of inkjet printing carriages (9, 16) respectively make reciprocating motion on the two groups of track beams (10, 15) mounted on the rack, and are provided with print heads (8, 17). The lower parts of the two groups of inkjet printing carriages (9, 16) are provided with inkjet printing platforms (7, 19) mounted on the rack, and the lower parts of the two inkjet printing carriages (9, 16) are provided with the driving rollers (5, 20). The two driving rollers (5, 20) are driven to rotate in the opposite direction respectively by two independent driving devices mounted on the rack. A printing material winding method is applied to the inkjet printer. The inkjet printer and the method can not only accurately print on two sides synchronously, but also perform a single-sided printing on two pieces of printing materials by the same printer at the same time, thus realizing multi purposes by one machine.

A double-paper-roll printing device includes an installation frame for installing the following components and paper rolls. A first paper roll and a second paper roll are installed on the installation frame through a paper roll supporting shaft. Paper tapes of the first paper roll and the second paper roll are selectively fed to a printing component through paper passages. The first paper roll and the second paper roll are selectively fed to the printing component through a first paper passage and a second paper passage that are mutually independent. The first paper passage and the second paper passage are mutually superposed. The tail end of the first paper passage and the tail end of the second paper passage form an intersecting end, and paper tape heads of the paper rolls enter the printing component through the intersecting end.

A synchronous single/double-sided digital inkjet printer comprises a rack, feeding rollers (2, 23), take-up rollers (3, 22), two groups of inkjet printing carriages (9, 16) and driving rollers (5, 20). The two groups of inkjet printing carriages (9, 16) respectively make reciprocating motion on the two groups of track beams (10, 15) mounted on the rack, and are provided with print heads (8, 17). The lower parts of the two groups of inkjet printing carriages (9, 16) are provided with inkjet printing platforms (7, 19) mounted on the rack, and the lower parts of the two inkjet printing carriages (9, 16) are provided with the driving rollers (5, 20). The two driving rollers (5, 20) are driven to rotate in the opposite direction respectively by two independent driving devices mounted on the rack. A printing material winding method is applied to the inkjet printer. The inkjet printer and the method can not only accurately print on two sides synchronously, but also perform a single-sided printing on two pieces of printing materials by the same printer at the same time, thus realizing multi purposes by one machine.