中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

31 records (took 0.023 seconds)

    Ink composition
    23.
    发明授权
    Ink composition 有权
    墨水组成

    公开(公告)号：US09187661B2

    公开(公告)日：2015-11-17

    申请号：US14349025

    申请日：2011-10-04

    Applicant: Keshava A. Prasad

    Inventor： Keshava A. Prasad

    IPC: C09D11/30 ,  C09D11/322 ,  C09D11/34 ,  C09D11/38 ,  B41J2/175

    CPC classification number: C09D11/30 ,  B41J2/17503 ,  C09D11/322 ,  C09D11/34 ,  C09D11/38

    Abstract: An ink composition includes from about 2 wt % to about 5 wt % of a colorant; from about 10 wt % to about 20 wt % of a co-solvent; from about 0.5 wt % to about 1.0 wt % of an alkyl phosphate ester; from about 0.5 wt % to about 9 wt % of any of methyl gluceth-10, methyl gluceth-20, PPG-10 methyl glucose ether, or PPG-20 methyl glucose ether; and a balance of water.

    Abstract translation: 油墨组合物包含约2重量％至约5重量％的着色剂; 约10重量％至约20重量％的共溶剂; 约0.5重量％至约1.0重量％的磷酸烷基酯; 约0.5重量％至约9重量％的任何甲基葡聚糖-10，甲基葡聚糖-20，PPG-10甲基葡萄糖醚或PPG-20甲基葡萄糖醚; 和水的平衡。

    Inkjet printing system that provides improved mottle
    26.
    发明授权
    Inkjet printing system that provides improved mottle 有权
    喷墨打印系统提供改进的斑点

    公开(公告)号：US07622513B2

    公开(公告)日：2009-11-24

    申请号：US11001387

    申请日：2004-12-01

    Applicant: George Sarkisian ,  Keshava A. Prasad

    Inventor： George Sarkisian ,  Keshava A. Prasad

    IPC: C09D11/00

    CPC classification number: B41M7/0018 ,  B41M5/0017 ,  B41M5/0023 ,  C09D11/324

    Abstract: An inkjet printing system that includes a fixer fluid and a pigment-based inkjet ink. The fixer fluid includes a cationic polymer and an acidic crashing agent. The inkjet ink includes an anionic pigment and at least one of the following: at least one nonionic surfactant present in the inkjet ink at less than or equal to approximately 0.1% by weight, at least one anionic binder present in the inkjet ink at less than or equal to approximately 2% by weight, and less than or equal to approximately 20% by weight of at least one organic solvent.

    Abstract translation: 一种喷墨打印系统，其包括定影液和基于颜料的喷墨油墨。 定影液包含阳离子聚合物和酸性崩解剂。 喷墨油墨包括阴离子颜料和以下至少一种：喷墨油墨中存在的至少一种非离子表面活性剂，其含量小于或等于约0.1重量％，至少一种存在于喷墨油墨中的阴离子粘合剂小于 或等于约2重量％，和小于或等于约20重量％的至少一种有机溶剂。

    Compositions and methods for selecting ink-jet inks exhibiting reduced puddling
    28.
    发明授权
    Compositions and methods for selecting ink-jet inks exhibiting reduced puddling 失效
    用于选择显示减少的搅拌的喷墨油墨的组合物和方法

    公开(公告)号：US06716278B2

    公开(公告)日：2004-04-06

    申请号：US10059689

    申请日：2002-01-28

    Applicant: Keshava A. Prasad ,  John M. Gardner ,  Peter C. Morris

    Inventor： Keshava A. Prasad ,  John M. Gardner ,  Peter C. Morris

    IPC: C09D1100

    CPC classification number: C09D11/32

    Abstract: A method of selecting a dye for use with a spreading vehicle can comprise the steps of evaluating a first dye having polar atoms and a second dye having polar atoms to determine a first polarity index and a second polarity index, respectively; and selecting the first dye or the second dye for inclusion in the spreading vehicle based upon a comparison of the first polarity index and the second polarity index. Further, a method of evaluating a dye and formulating an ink-jet ink can comprise the steps of providing a spreading ink-jet ink vehicle; selecting a dye to be evaluated for inclusion in the spreading ink-jet ink vehicle; determining the ratio of polar atoms to carbon atoms within the dye; selecting a desired polarity index ratio range; and admixing the dye with the spreading ink-jet ink vehicle if the ratio is within the desired polarity index ratio range. Additionally, an ink-jet ink composition exhibiting reduced orifice plate puddling can comprise an ink-jet ink vehicle containing 7% to 15% by weight of a 1,2-hexanediol solvent in the absence of added surfactant; and an effective amount of a dye having a normalized polarity index from about 7 to 12.

    Abstract translation: 选择用于铺展载体的染料的方法可以包括以下步骤：评估具有极性原子的第一染料和具有极性原子的第二染料以分别确定第一极性指数和第二极性指数; 并且基于第一极性指数和第二极性指数的比较，选择第一染料或第二染料包含在铺展载体中。 此外，评价染料和配制喷墨油墨的方法可以包括以下步骤：提供喷涂喷墨油墨载体; 选择待评估以包含在铺展喷墨油墨载体中的染料; 确定染料中极性原子与碳原子的比例; 选择期望的极性指标比范围; 并且如果该比率在期望的极性指数比范围内，则将染料与扩展喷墨油墨载体混合。 此外，显示出减少的孔板搅拌的喷墨油墨组合物可以包括在没有添加的表面活性剂的情况下含有7重量％至15重量％的1,2-己二醇溶剂的喷墨油墨载体; 和有效量的具有约7-12的归一化极性指数的染料。

    Printing liquids for improved print quality
    29.
    发明授权
    Printing liquids for improved print quality 失效
    印刷液体以提高打印质量

    公开(公告)号：US06022908A

    公开(公告)日：2000-02-08

    申请号：US64643

    申请日：1998-04-22

    Applicant: Zeying Ma ,  Keshava A. Prasad

    Inventor： Zeying Ma ,  Keshava A. Prasad

    IPC: B41J2/01 ,  B41M5/00 ,  C09D11/00 ,  C09D11/02 ,  C09D11/10 ,  C09D133/02 ,  C09D133/08 ,  C09D133/10

    CPC classification number: C09D11/40

    Abstract: A set of printing liquids is disclosed comprising a first anionic printing liquid comprising an aqueous vehicle, at least one first colorant, and at least one first anionic polymer; a second anionic printing liquid comprising an aqueous vehicle at least one second colorant, at least one second anionic polymer, and an acid additive having a pKa up to the pKa of the at least first polymer of the first liquid; a third cationic printing liquid comprising an aqueous vehicle, at least one third colorant, at least one third cationic polymer, and a pH in the range from about 2 to about 5; and a fourth anionic printing liquid comprising an aqueous vehicle, at least one fourth anionic dye, and a precipitating agent. More specifically, the present set of printing liquids may find application in ink-jet printing. The set of ink-jet inks provides improved print quality, specifically, reduced bleed; improved edge-acuity, uniform area fills, and color quality; while maximizing lightfastness without sacrificing printing reliability.

    Abstract translation: 公开了一组印刷液体，其包含第一阴离子印刷液体，其包含含水载体，至少一种第一着色剂和至少一种第一阴离子聚合物; 第二阴离子印刷液体，其包含水性载体至少一种第二着色剂，至少一种第二阴离子聚合物和具有至多第一液体的至少第一聚合物的pKa的pKa的酸添加剂; 第三阳离子印刷液体，其包含水性载体，至少一种第三着色剂，至少一种第三阳离子聚合物和约2至约5的pH; 和第四阴离子印刷液体，其包含含水载体，至少一种第四阴离子染料和沉淀剂。 更具体地，本组印刷液体可以应用于喷墨印刷。 这套喷墨油墨提供了改进的打印质量，特别是减少了出血; 改善边缘敏锐度，均匀区域填充和颜色质量; 同时最大化耐光性而不牺牲打印可靠性。

    Reliable high performance drop generator for an inkjet printhead
    30.
    发明授权
    Reliable high performance drop generator for an inkjet printhead 失效
    用于喷墨打印头的可靠的高性能液滴发生器

    公开(公告)号：US5946012A

    公开(公告)日：1999-08-31

    申请号：US90968

    申请日：1998-06-04

    Applicant: Kenneth J. Courian ,  John L. Stoffel ,  Richard A. Sader ,  Keshava A. Prasad ,  Steven L. Webb ,  David H. Donovan ,  Jules G. Moritz, III ,  Brian J. Keefe ,  Steven W. Steinfield ,  Winthrop D. Childers

    Inventor： Kenneth J. Courian ,  John L. Stoffel ,  Richard A. Sader ,  Keshava A. Prasad ,  Steven L. Webb ,  David H. Donovan ,  Jules G. Moritz, III ,  Brian J. Keefe ,  Steven W. Steinfield ,  Winthrop D. Childers

    IPC: B41J2/05 ,  B41J2/14 ,  B41J2/16

    CPC classification number: B41J2/1643 ,  B41J2/04511 ,  B41J2/04541 ,  B41J2/04543 ,  B41J2/04546 ,  B41J2/0458 ,  B41J2/04581 ,  B41J2/14024 ,  B41J2/1404 ,  B41J2/14072 ,  B41J2/14129 ,  B41J2/14145 ,  B41J2/14201 ,  B41J2/1433 ,  B41J2/1603 ,  B41J2/1623 ,  B41J2/1625 ,  B41J2/1628 ,  B41J2/1631 ,  B41J2/1634 ,  B41J2202/13

    Abstract: An inkjet drop ejection system comprises a combination of printhead components and ink, mutually tuned to maximize operating characteristics of the printhead and print quality and dry time of the ink. Use of a short shelf (distance from ink source to ink firing element), on the order of 55 microns, provides a very high speed refill. However, it is a characteristic of high speed refill that it has a tendency for being over-damped. To provide the requisite damping, the ink should have a viscosity greater than about 2 cp. In this way, the ink and architecture work together to provide a tuned system that enables stable operation at high frequencies. One advantage of the combination of a pigment and a dispersant in the ink is the resultant higher viscosity provided. The high speed would be of little value if the ink did not have a fast enough rate of drying. This is accomplished by the addition of alcohols or alcohol(s) and surfactant(s) to the ink. Fast dry times are achieved with a combination of alcohols, such as iso-propyl alcohol with a 4 or 5 carbon alcohol or with iso-propyl alcohol plus surfactant(s). One preferred embodiment of a short shelf (90 to 130 microns), ink viscosity of about 3 cp, and surface tension of about 54 provides a high speed drop generator capable of operating at about 12 KHz. Reducing the shelf length to about 55 microns, in combination with rotating the substrate at an angle to the scan direction, permits maximum drop generator operation as high as about 20 KHz. As a consequence of employing pigment-based inks, high optical densities are realized, along with excellent permanence (no fade and better waterfastness), and good stability. The combination of preferred ink and pen architecture provides good drop generator stability.

    Abstract translation: 喷墨墨滴喷射系统包括打印头部件和油墨的组合，其相互调节以最大化打印头的操作特性以及油墨的打印质量和干燥时间。 使用大约55微米的短搁架（墨水源到墨水喷射元件的距离）提供了非常高的速度补充。 然而，高速补充的特征是它具有过度阻尼的倾向。 为了提供必要的阻尼，油墨的粘度应大于约2cp。 以这种方式，墨水和结构共同工作，提供了一个可在高频下稳定运行的调谐系统。 油墨中颜料和分散剂的组合的一个优点是得到较高的粘度。 如果墨水没有足够的干燥速度，高速度就没有什么价值。 这通过向油墨中加入醇或醇和表面活性剂来实现。 快速干燥时间是通过醇，如异丙醇与4或5碳醇或与异丙醇加表面活性剂的组合来实现的。 短架（90-130微米），油墨粘度约为3cp，表面张力约为54的一个优选实施例提供了能够在约12KHz下操作的高速液滴发生器。 将搁板长度减小至约55微米，与基板以扫描方向成一定角度的旋转结合使得最大的液滴发生器运转高达约20KHz。 作为使用颜料基油墨的结果，实现了高的光密度，以及优异的耐久性（不褪色和更好的耐水性）和良好的稳定性。 优选的墨水和笔结构的组合提供了良好的液滴发生器稳定性。

Patent Agency Ranking