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AssigneeSeiko Epson Corporation
InventorsKeitaro NAKANO, Takashi OYANAGI, Kazushige INOUE
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Ultraviolet-ray irradiation devices are attached to a carriage having a print head that ejects ultraviolet curable ink, and include a plurality of ultraviolet light sources and that irradiate ultraviolet rays onto an ink coating ejected on a print sheet by a print head. An ultraviolet ray that is irradiated onto the print sheet in the vicinity of the print head has a wavelength longer than an ultraviolet ray that is irradiated onto the print sheet apart from the vicinity of the print head along the moving direction of the carriage. The ultraviolet ray irradiation devices are capable of sufficiently curing ultraviolet curable ink without the problem of only the surface of the ink being cured in a print process (for example a monochrome print process) when the ink coating adhered to the recording medium is relatively thick.
An ultraviolet ray irradiation device comprising an ultraviolet light source that irradiates ultraviolet rays onto ultraviolet curable ink ejected on a recording medium by a record head,
A method of recoding on a recording medium in a monochrome color by using ultraviolet curable ink, wherein, when the ultraviolet curable ink ejected on the recording medium from a record head is to be cured, the ultraviolet ray curable ink is cured by irradiating an ultraviolet ray of the ultraviolet light source that irradiates the ultraviolet ray on the recording medium in the vicinity of the record head which has a wavelength longer than an ultraviolet ray of the ultraviolet light source that irradiates the ultraviolet ray onto the recording medium apart from the vicinity of the record head.
Dependencies are inferred from the claim text.