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1. 发明授权

US4194211A Charge electrode array for multi-nozzle ink jet array 失效
标题翻译：用于多喷嘴喷墨阵列的充电电极阵列
公开(公告)号：US4194211A
公开(公告)日：1980-03-18
申请号：US917144
申请日：1978-06-19
申请人： Arthur R. Hoffman , Gerald B. Lammers
发明人： Arthur R. Hoffman , Gerald B. Lammers
IPC分类号： B41J2/085 , B41J2/09 , G01D15/18
CPC分类号： B41J2/085
摘要： A charge electrode array for a multi-nozzle ink jet array is fabricated from alternate layers of stainless steel and epoxy resin. The charge electrode array may be formed by positioning stainless steel tabs in previously grooved nonconductive substrate such as ceramic. The grooves are spaced sufficiently apart to allow insulating material to be placed between each stainless steel tab. Alternatively, a stainless steel plate may be bonded to a nonconductive substrate. Then the stainless steel can be sliced so that insulating material can be placed between each stainless steel strip. Epoxy fills the gap between tabs or strips forming an insulating layer. An ink drop charging channel through each tab or strip is formed by drilling through the tips of the steel tabs or strips, or by cutting U-shaped channels through the tips of the tabs or strips.
摘要翻译：用于多喷嘴喷墨阵列的电荷电极阵列由不锈钢和环氧树脂的交替层制成。充电电极阵列可以通过将不锈钢突片定位在预先开槽的非导电基底（例如陶瓷）中而形成。槽间隔足够大，以使绝缘材料放置在每个不锈钢接头之间。或者，不锈钢板可以结合到非导电基板。然后可以切割不锈钢，以便绝缘材料可以放置在每个不锈钢带之间。环氧填充形成绝缘层的突片或条带之间的间隙。通过穿过钢制突片或条带的尖端，或者通过穿过突出部或条带的尖端切割U形通道来形成通过每个突片或条带的墨滴充电通道。

2. 发明授权

US4841310A High performance ink jet print head for use in a high speed printer 失效
标题翻译：用于高速打印机的高性能喷墨打印头
公开(公告)号：US4841310A
公开(公告)日：1989-06-20
申请号：US176118
申请日：1988-03-31
申请人： Arthur R. Hoffman
发明人： Arthur R. Hoffman
IPC分类号： B41J2/02 , B41J2/025
CPC分类号： B41J2/025
摘要： While present-day ink jet print heads are operable technically, they are too inconsistent and unreliable, and none has remained operational for as long as one year.The disclosure describes three structural improvements to these present-day ink jet print heads, any one of which offers a dramatic improvement over present-day head structures. However, if all three improvements described in the disclosure are included in the same print head, as high performance as 100% is available from those produced.The first improvement described relates to the gasket between the ink reservoir, with its nozzle plate attached, and the drop generator body that encloses the dynamic pressure transducer. If this gasket is formed of very soft material, having a durometer value in the order of 60, then it is only necessary to clamp the plate to the drop generator body with sufficient torque to seat and seal the ink reservoir to prevent ink leakage.The second improvement described requires a small space between each crystal in a piezoelectric transducer and the washer of acoustic-absorbing material, and the third improvement involves the support rod for these crystals. The support rod should fit with sufficient frictional force to retain the crystals in a preset position, avoiding all unnecessary extra loading of the crystals.

3. 发明授权

US4245225A Ink jet head 失效
标题翻译：喷墨头
公开(公告)号：US4245225A
公开(公告)日：1981-01-13
申请号：US958916
申请日：1978-11-08
申请人： Gary L. Fillmore , Arthur R. Hoffman , Thomas Young
发明人： Gary L. Fillmore , Arthur R. Hoffman , Thomas Young
IPC分类号： B41J2/02 , B41J2/155 , B41J2/21 , G01D15/18
CPC分类号： B41J2/02 , B41J2/155
摘要： An inner cylindrical tube has its outer cylindrical surface spaced from an inner cylindrical surface of outer means to have an ink cavity therebetween from which ink is supplied through one or more ink jet nozzles. At least the inner tube is a piezoelectric material so that the inner tube vibrates radially when electrically excited to produce vibrations at a desired operating frequency whereby a stream of ink droplets is supplied from each of the ink jet nozzles. The spacing between the inner surface, which has its longitudinal axis coaxial with the longitudinal axis of the inner cylindrical tube, of the outer means and the outer surface of the inner cylindrical tube is selected so that the ink cavity is resonant at the operating frequency of the inner cylindrical tube. To maintain the lowest frequencies of perturbations in the axial direction of the inner cylindrical tube substantially greater than the operating frequency, the inner cylindrical tube can be formed of a plurality of longitudinal segments acoustically isolated from each other in the axial direction. In another form, the outer means is a body formed with a membrane providing acoustical communication from a liquid cavity between the inner tube and the body and each ink cavity, which has ink jet nozzles at its end. The liquid cavity preferably has a liquid of substantially the same density as the ink. This enables each of the ink cavities to have a different colored ink if desired.
摘要翻译：内圆柱形管具有与外部装置的内圆柱形表面间隔开的外圆柱形表面以在其间具有墨腔，通过一个或多个喷墨喷嘴供墨。至少内管是压电材料，使得当电激励时，内管径向振动以在期望的工作频率产生振动，从而从每个喷墨喷嘴提供墨滴流。选择外表面和内圆柱管的外表面之间具有与内圆柱形管的纵向轴线同轴的内表面与内圆柱形管的外表面之间的间隔，使得油腔在工作频率内圆柱管。为了保持内圆柱形管的轴向方向上的最低扰动频率基本上大于工作频率，内圆柱形管可以由在轴向方向彼此声学隔离的多个纵向段形成。在另一种形式中，外部装置是形成有膜的主体，其提供从内管和主体之间的液体空腔与每个墨腔在其端部具有喷墨嘴的声学连通。液腔优选具有与油墨基本上相同密度的液体。如果需要，这使得每个墨腔具有不同的着色墨。

4. 发明授权

US4185290A Compensation for aerodynamic drag on ink streams from a multi-nozzle ink array 失效
标题翻译：从多喷嘴墨水阵列对油墨流的气动阻力的补偿
公开(公告)号：US4185290A
公开(公告)日：1980-01-22
申请号：US863300
申请日：1977-12-22
申请人： Arthur R. Hoffman
发明人： Arthur R. Hoffman
IPC分类号： B41J2/02 , B41J2/135 , B41J2/16 , G01D15/18
CPC分类号： B41J2/1433
摘要： A multi-nozzle ink jet array has all of the nozzles arranged in a single plane with each of the nozzles having a longitudinal passage extending therethrough of the same diameter. The lengths of the longitudinal passages of the nozzles at each end of the array are shorter than those in the center of the array to cause an increased initial velocity of the ink jet streams flowing therefrom so as to compensate for aerodynamic drag on the end streams.
摘要翻译：多喷嘴喷墨阵列具有布置在单个平面中的所有喷嘴，其中每个喷嘴具有延伸穿过其中的相同直径的纵向通道。阵列每端的喷嘴的纵向通道的长度短于阵列中心处的喷嘴的纵向通道的长度，从而使从其流出的喷墨流的初始速度增加，从而补偿端流上的气动阻力。

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