公开(公告)号：EP0300634B1

公开(公告)日：1992-04-29

申请号：EP88306130.1

申请日：1988-07-06

申请人： Hewlett-Packard Company

发明人： Smith, James C. ,  Mostafa, Hatem E. ,  Walsh, William J.

IPC分类号： B41J2/005

CPC分类号： B41J2/04515 ,  B41J2/04528 ,  B41J2/04563 ,  B41J2/0458 ,  B41J2/04596 ,  B41J2/04598

公开(公告)号：EP0294154A3

公开(公告)日：1991-09-25

申请号：EP88304950.4

申请日：1988-05-31

申请人： Hewlett-Packard Company

发明人： Ta, Chuong C. ,  Majette, Mark W. ,  Mostafa, Hatem E.

IPC分类号： G01D5/34 ,  G01D5/26 ,  G01D5/24

CPC分类号： G01D5/2457 ,  G01D5/34715 ,  G01D15/24

摘要： The single channel encoder comprises a transparent scale (2) in which the scale divisions are defined by transverse opaque lines (2a) having a width greater than the width between the opaque lines. An emitter holder (14) and a detector holder (13) snap together clamping an aperture plate (12) therebetween. The aperture plate has a slit (12a) therein which is disposed in the optical path between the emitter (11) and the detector (10). Projections functioning as scale supports on the opposite sides of the emitter holder and the detector holder are disposed in longitudinally spaced positions and define a gap therebetween for engaging the outside edges of the encoder scale (2) outside of the opaque transverse lines (2a) to precisely position the tape in the optical path for maintaining a constant gap between the encoder scale and the aperture plate.

公开(公告)号：EP0300634A1

公开(公告)日：1989-01-25

申请号：EP88306130.1

申请日：1988-07-06

申请人： Hewlett-Packard Company

发明人： Smith, James C. ,  Mostafa, Hatem E. ,  Walsh, William J.

IPC分类号： B41J2/005

CPC分类号： B41J2/04515 ,  B41J2/04528 ,  B41J2/04563 ,  B41J2/0458 ,  B41J2/04596 ,  B41J2/04598

摘要： Thermal inkjet printhead temperature control is provided in a temperature control system responsive to printhead temperature, which in the presence of printhead overheating selectively causes the printhead to stand idle, or, if multiple nozzles are available, shifts to a nozzle which is not overheated, which in the event a nozzle is unused for some time and the dye transport agent may have evaporated leaving a viscous plug in the nozzle employs warm up pulsing and/or nozzle spitting to clear the nozzles, and which when the temperature of the nozzle is below acceptable printing temperatures, nozzle pulsing for warm up and/or nozzle spitting to clear the nozzles, all such decisions and actions being provided in advance of beginning a printing operation.

摘要翻译： 热敏喷墨打印头温度控制在温度控制系统中提供，其响应于打印头温度，其在打印头过热的情况下选择性地使打印头怠速，或者如果多个喷嘴可用，则转移到不过热的喷嘴， 在喷嘴未使用一段时间并且染料运输剂可能已经蒸发而在喷嘴中留下粘性塞时，采用预热脉冲和/或喷嘴喷出以清除喷嘴，以及当喷嘴的温度低于可接受时 打印温度，用于预热和/或喷嘴喷射的喷嘴脉冲以清除喷嘴，所有这些决定和动作在开始打印操作之前提供。

公开(公告)号：EP0294154A2

公开(公告)日：1988-12-07

申请号：EP88304950.4

申请日：1988-05-31

申请人： Hewlett-Packard Company

发明人： Ta, Chuong C. ,  Majette, Mark W. ,  Mostafa, Hatem E.

IPC分类号： G01D5/34 ,  G01D5/26 ,  G01D5/24

CPC分类号： G01D5/2457 ,  G01D5/34715 ,  G01D15/24

摘要： The single channel encoder comprises a transparent scale (2) in which the scale divisions are defined by transverse opaque lines (2a) having a width greater than the width between the opaque lines. An emitter holder (14) and a detector holder (13) snap together clamping an aperture plate (12) therebetween. The aperture plate has a slit (12a) therein which is disposed in the optical path between the emitter (11) and the detector (10). Projections functioning as scale supports on the opposite sides of the emitter holder and the detector holder are disposed in longitudinally spaced positions and define a gap therebetween for engaging the outside edges of the encoder scale (2) outside of the opaque transverse lines (2a) to precisely position the tape in the optical path for maintaining a constant gap between the encoder scale and the aperture plate.

摘要翻译： 单通道编码器包括透明标尺（2），其中刻度分度由横向不透明线（2a）限定，该横向不透明线（2a）的宽度大于不透明线之间的宽度。 一个发射器夹持器（14）和一个检测器夹持器（13）卡在一起夹紧其间的孔板（12）。 孔板在其中具有狭缝（12a），其设置在发射器（11）和检测器（10）之间的光路中。 在发射器支架和检测器支架的相对侧上起到刻度支撑作用的投影被设置在纵向间隔开的位置中并且在它们之间限定间隙以用于在编码器标尺（2）的外侧边缘与不透明横向线（2a）至 将光带准确地定位在光路中以保持编码器标尺和光圈板之间的恒定间隙。