| 摘要 |
The disclosure is to more appropriately perform high-quality printing in a case of using ultraviolet curing ink in a serial type inkjet printer. In a printing apparatus for performing printing in an inkjet mode, an inkjet head for Y color, an inkjet head for M color, temporarily hardening light sources, an inkjet head, and an inkjet head are arranged such that their positions in the sub scan direction are deviated from each other. With respect to each position on a medium, after the inkjet head ejects ink drops, the temporarily hardening light sources hardens the ultraviolet curing ink of the Y color on the medium, to a temporarily hardened state, before the inkjet head ejects ink drops, and then the inkjet head ejects ink drops of the M color onto the area where the ultraviolet curing ink of the Y color has hardened to the temporarily hardened state. |
| 主权项 |
1. A printing apparatus which performs printing on a medium with an ultraviolet curing ink of N-number of different colors in an inkjet mode, where N is an integer of 2 or greater, and the printing apparatus comprising:
a first-color head that is an inkjet head configured to eject first-color ink drops which are ink drops of the ultraviolet curing ink of a first color of the N-number of colors; a second-color head which is an inkjet head configured to eject second-color ink drops which are ink drops of the ultraviolet curing ink of a second color which is one of the N-number of colors and is different from the first color; a main scan driver configured to drive the first-color head and the second-color head to perform main scan operations of ejecting ink drops while moving in a predetermined main scan direction; a sub scan driver configured to relatively move the first-color head and the second-color head with respect to the medium in a sub scan direction perpendicular to the main scan direction; a temporarily hardening light source configured to radiate an ultraviolet light which hardens the ultraviolet curing ink on the medium to a temporarily hardened state which is a state where at least a surface of the ultraviolet curing ink has viscosity; and a fully hardening light source configured to radiate the ultraviolet light which completes hardening of the ultraviolet curing ink on the medium, wherein the first-color head and the second-color head are installed such that their positions in the sub scan direction are deviated from each other, with respect to each position on the medium, the first-color head ejects the first-color ink drops in one of the main scan operations which is determined according to the position on the medium, and after the first-color head ejects the first-color ink drops, in another main scan operation, the second-color head ejects the second-color ink drops, with respect to each position on the medium, after the first-color head ejects the first-color ink drops, the temporarily hardening light source hardens the ultraviolet curing ink of the first color on the medium, to the temporarily hardened state, before the second-color head ejects the second-color ink drops, the second-color head ejects the second-color ink drops onto an area where the ultraviolet curing ink of the first color has hardened to the temporarily hardened state, and with respect to each position on the medium, after the second-color ink drops are ejected, the fully hardening light source radiates the ultraviolet light. |
