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    • 6. 发明授权
    • Ink-jet print head having improved thermal uniformity
    • 具有改善的热均匀性的喷墨打印头
    • US5635964A
    • 1997-06-03
    • US374938
    • 1995-01-18
    • Ronald F. BurrJames D. PadgettJames D. BuehlerMeade Neal
    • Ronald F. BurrJames D. PadgettJames D. BuehlerMeade Neal
    • B41J29/38
    • B41J29/38
    • An improved media-width phase-change ink-jet print had (102) maintains a uniform temperature across its width to produce consistent drop mass and uniform print quality. The print head uses a heater (120) including two separately controlled, overlapping heating zones (154). The heating zones produce heat gradients (170, 172) that have maximum outputs toward opposing edges (168a, 168b) of the print head and are controlled in response to thermistors (138s, 168b) positioned at the corresponding edges. The two heating zones together produce a linear heat gradient (180) across the print heat to compensate for uneven head-to-drum spacing (166) and other unsymmetrical thermal loads on the print head. The improved print head also includes baffles (192) that reduce air flow between the head and the attached reservoir (118), and thermal breaks (218) that insulate the section (220) of the head that includes the jets from the thermal gradients at the edges of the print head.
    • 改进的介质宽度相变喷墨印刷(102)在其宽度上保持均匀的温度,以产生一致的液滴质量和均匀的打印质量。 打印头使用包括两个分开控制的重叠加热区(154)的加热器(120)。 加热区产生对打印头的相对边缘(168a,168b)具有最大输出的热梯度(170,172),并响应于位于相应边缘的热敏电阻(138s,168b)来控制。 两个加热区域一起在打印热量上产生线性热梯度(180),以补偿打印头上不均匀的头对鼓间距(166)和其他不对称的热负荷。 改进的打印头还包括减少头部和附接的储存器(118)之间的空气流动的挡板(192),以及热断裂(218),其将包括射流的头部的部分(220)与热梯度隔离 打印头的边缘。
    • 9. 发明授权
    • Polymer internal contamination filter for ink jet printhead
    • 用于喷墨打印头的聚合物内部污染过滤器
    • US08702216B2
    • 2014-04-22
    • US13333068
    • 2011-12-21
    • Terrance L StephensJames D. PadgettJohn R. AndrewsAndrew W. Hays
    • Terrance L StephensJames D. PadgettJohn R. AndrewsAndrew W. Hays
    • B41J2/175
    • B41J2/1607B41J2/1629B41J2/1631B41J2/1634B41J2002/14403
    • A printhead for printing ink includes a particulate filter manufactured from a polymer sheet such as a polyimide sheet. Filter openings within the particulate filter can be formed using a mask and a laser beam to ablate exposed portions of the polymer sheet. Embodiments of the present teachings can result in the formation smaller filter openings at a smaller pitch within the polymer sheet than, for example, stainless steel particulate filters, and thus more openings which cover a larger percentage of the filter surface for a given filter size, which can result in a reduction of fluid pressure within the printhead. Thus smaller filter openings for improved filtering of smaller particulates can be formed while maintaining a sufficient ink flow at a sufficiently low pressure within the printhead during operation.
    • 用于印刷油墨的打印头包括由诸如聚酰亚胺片材的聚合物片材制成的微粒过滤器。 可以使用掩模和激光束来形成微粒过滤器内的过滤器孔,以消除聚合物片的暴露部分。 本教导的实施例可以导致在聚合物片材内以比例如不锈钢颗粒过滤器更小的间距形成更小的过滤器开口,因此,对于给定的过滤器尺寸,覆盖更大百分比的过滤器表面的更多的开口, 这可能导致打印头内的流体压力的降低。 因此,可以在操作期间形成用于改善过滤较小颗粒的较小的过滤器开口,同时在打印头内保持足够低的压力下的足够的油墨流动。