Multi-pass UV inkjet printer for outputting high glossy varnish and printing method using the same

    公开(公告)号:US10427442B2

    公开(公告)日:2019-10-01

    申请号:US15870901

    申请日:2018-01-13

    Abstract: A multi-pass UV inkjet printer for outputting high glossy varnish and a printing method using the same includes providing a side UV light irradiation device at a side of an inkjet module and a front UV light irradiation device in front of the inkjet module not overlapped by a varnish print head. During output of the varnish, varnish outputted on a substrate in the nth pass is passed under the side UV light irradiation device with a lower UV irradiation power during or after the n+1th pass performed by the UV inkjet printer for setting or temporarily no curing, and then during or after the next pass, the varnish is passed under the front UV light irradiation device with a higher UV irradiation power for complete curing, thereby increasing production yield.

    UV inkjet printing method providing stacked printing edge with smooth effect

    公开(公告)号:US10773531B2

    公开(公告)日:2020-09-15

    申请号:US16103494

    申请日:2018-08-14

    Abstract: An ultraviolet (UV) inkjet printing method providing a stacked printing edge with a smooth effect is disclosed. After an inkjet head is controlled to print an image X on a substrate, a distance between the inkjet head and a surface of the substrate is kept unchanged, and the inkjet head is again controlled to print bi-directionally for at least once on the image X. After completing the above steps, the inkjet head is further controlled to print an image X′ on the image X on the substrate, wherein the image X′ consists of pixels expanded from the image X, such that the image X′ completely covers the image X, forming a smooth arc surface at peripheral edges of the image X.

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