Apparatus and method for drop size switching in ink jet printing
    3.
    发明授权
    Apparatus and method for drop size switching in ink jet printing 有权
    喷墨印刷中液滴尺寸切换的装置和方法

    公开(公告)号:US06629739B2

    公开(公告)日:2003-10-07

    申请号:US09738676

    申请日:2000-12-14

    Inventor: Steven V. Korol

    CPC classification number: B41J2/04581 B41J2/04588 B41J2/04593 B41J2/2128

    Abstract: An apparatus and method provide on-demand drop volume modulation by utilizing a single transducer driving waveform to drive an ink jet. The driving waveform includes at least a first portion and a second portion that each excites a different modal resonance of ink in an ink jet orifice to produce ink drops having different volumes. A control signal is applied to the driving waveform to actuate the selected portion of the waveform to eject the desired ink drop volume. The apparatus and method improves resolution in gray scale printing by knowing an input request and placing a combination of small drops and large drops in a conventional blue noise halftone screen represented as a threshold array such that throughput and image quality goals are met while decreasing jetting robustness risk.

    Abstract translation: 一种装置和方法通过利用单个换能器驱动波形来驱动喷墨来提供按需液滴体积调制。 驱动波形包括至少第一部分和第二部分,每个部分和第二部分在喷墨孔中激发墨的不同模态共振以产生具有不同体积的墨滴。 将控制信号施加到驱动波形以致启动波形的选定部分以喷射所需的墨滴体积。 该装置和方法通过了解输入请求并将小滴和大滴的组合放置在表示为阈值阵列的常规蓝色噪声半色调屏幕中来提高灰度打印中的分辨率,使得满足吞吐量和图像质量目标,同时降低喷射鲁棒性 风险。

    Automatic document feed of phase change inks
    7.
    发明授权
    Automatic document feed of phase change inks 有权
    相变油墨自动进纸

    公开(公告)号:US06481840B1

    公开(公告)日:2002-11-19

    申请号:US09383034

    申请日:1999-08-25

    CPC classification number: B41J2/17593

    Abstract: A method of improving automatic document feed of media printed with phase change inks coats the surface of the phase change inks on the media with fine particles. The particles may include PMMA, glass bead, silica particles, crushed glass particles, kaolin clay, micronized PE and PTFE, calcium carbonate powder, hard inks or toner powder. The particles may be applied to the surface of a transfix drum by oil transfer or electrostatically prior to jetting the phase change ink, or in the case of hard inks may be jetted onto the surface of the transfix drum (offset) with the phase change ink or onto the print media (direct) after application of the phase change ink in an overprint printing process. Also the particles may be applied by a pair of finishing rollers after the media has been printed with the phase change inks, either in a direct or offset print process, the finishing roller on the print side being coated with the fine particles.

    Abstract translation: 改进用相变油墨印刷的介质的自动原稿进给的方法用细颗粒在介质上涂覆相变油墨的表面。 颗粒可以包括PMMA,玻璃珠,二氧化硅颗粒,碎玻璃颗粒,高岭土,微粉化PE和PTFE,碳酸钙粉末,硬油墨或调色剂粉末。 可以在喷射相变油墨之前通过油转移或静电将颗粒施加到转鼓的表面,或者在硬油墨的情况下可以用相变油墨喷射到转筒(表面)上 或在将相变墨水应用于套印印刷工艺之后在打印介质(直接)上。 此外,在直接或胶版印刷工艺中,用相变油墨印刷介质之后,也可以通过一对精加工辊施加颗粒,打印面上的精加工辊被微粒涂覆。

Patent Agency Ranking