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1.发明授权Ink jet printer employing time of flight control system for ink jet printers 失效喷墨打印机采用喷墨打印机飞行时间控制系统
公开(公告)号：US5517216A
公开(公告)日：1996-05-14
申请号：US920797
申请日：1992-07-28
申请人： Michael E. Stamer , George Arway
发明人： Michael E. Stamer , George Arway
摘要： Flight time of a stream of ink drops is measured and compared against a set point to determine variations therefrom. Variations due to changes in the ink composition are compensated for by adding or withholding solvent in proportion to the detected change. Changes due to variations in nozzle drive voltage result in the computation and use of a new flight time set point value, if necessary to avoid erroneous corrective action.
摘要翻译： 测量墨滴流的飞行时间并与设定点进行比较以确定其变化。 通过与检测到的变化成比例地添加或扣留溶剂来补偿由于油墨组合物变化引起的变化。 喷嘴驱动电压变化导致计算和使用新的飞行时间设定值，必要时可避免错误的纠正措施。
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公开(公告)号：US4720618A
公开(公告)日：1988-01-19
申请号：US894366
申请日：1986-08-07
CPC分类号： B23K26/0626 , B23K26/06 , B23K26/0604 , B23K26/0613 , G06K1/126 , B23K2201/007
摘要： Variations in laser output power are compensated for by increasing the on time of weaker output lasers relative to the more powerful lasers. To avoid nonlinearities where the object to be marked is a moving substrate, the on time pulses which control the lasers are centered about a single time reference point. Additionally, for high printing rates a pre-ionization technique is disclosed which is utilized to enable a laser to fire more quickly than would otherwise be possible. Pre-ionization may be used for every dot to be printed or only when a laser has not been fired during the previous printing "stroke" depending upon the stroke rate.
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公开(公告)号：US5583544A
公开(公告)日：1996-12-10
申请号：US319264
申请日：1994-10-06
申请人： Michael E. Stamer , Colin Sharpe
发明人： Michael E. Stamer , Colin Sharpe
CPC分类号： B41J2/17503 , B41J2/17566 , G01F23/242 , G01F23/243 , B41J2/17513 , B41J2/17556 , B41J2002/17579
摘要： The ink level sensor of the invention comprises an ink container having a generally cylindrical shield extending downward from its top to define shielded and unshielded compartments within the container. Ink, but not foam, froth or mist, flows under the shield to the shielded compartment. A plurality of conductive rods of differing length extend downwardly into the shielded compartment from the container top. The rods are connected to an impedance network which provides signals representative of the ink level inside the container. A vacuum source can be connected to each compartment to maintain pressure equilibrium in the compartments and to prevent foam, froth or mist from entering the shielded compartment. Alternatively, a return pump is used to force ink into the container such that each compartment can be vented to the atmosphere.
摘要翻译： 本发明的墨水量传感器包括具有从其顶部向下延伸的大致圆柱形护罩的墨水容器，以在容器内限定屏蔽和非屏蔽隔室。 油墨，但不是泡沫，泡沫或雾，在屏蔽下流到屏蔽隔间。 多个不同长度的导电棒从容器顶部向下延伸到屏蔽隔间中。 杆连接到阻抗网络，该阻抗网络提供表示容器内的墨水水平的信号。 真空源可以连接到每个隔间，以保持室内的压力平衡，并防止泡沫，泡沫或雾气进入屏蔽隔间。 或者，使用返回泵来迫使墨水进入容器，使得每个隔间可以排放到大气中。
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4.发明授权Method and apparatus for equalizing power output in a laser marking system 失效用于均衡激光打标系统中的功率输出的方法和装置
公开(公告)号：US4727235A
公开(公告)日：1988-02-23
申请号：US081797
申请日：1987-08-05
CPC分类号： G06K15/1261 , B23K26/0604 , B23K26/0622 , G06K1/126 , G06K15/10 , B23K2201/007 , B41M5/24 , B41M5/26 , G06K15/1266
摘要： Variations in laser output power are compensated for by increasing the on time of weaker output lasers relative to the more powerful lasers. To avoid nonlinearities where the object to be marked is a moving substrate, the on time pulses which control the lasers are centered about a single time reference point. Additionally, for high printing rates a pre-ionization technique is disclosed which is utilized to enable a laser to fire more quickly than would otherwise be possible. Pre-ionization may be used for every dot to be printed or only when a laser has not been fired during the previous printing "stroke" depending upon the stroke rate.
摘要翻译： 通过相对于更强大的激光器增加输出激光器的导通时间来补偿激光输出功率的变化。 为了避免要标记的物体是移动衬底的非线性，控制激光器的导通时间脉冲以单个时间参考点为中心。 此外，对于高打印率，公开了一种用于使激光器能够比其他可能的方式更快地起火的预电离技术。 预电离可用于要打印的每个点，或者仅在激光器根据行程速率在以前的打印“冲程”期间未被激发时使用。
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公开(公告)号：US5396273A
公开(公告)日：1995-03-07
申请号：US827896
申请日：1992-01-30
申请人： Michael E. Stamer
发明人： Michael E. Stamer
摘要： A microprocessor-based control system for use in ink jet printers periodically measures flow rate of marking fluid, flow time or flight time of marking fluid drops and adjusts the voltage supplied to deflection electrodes-to maintain constant character height notwithstanding changes in the printer operating environment that would otherwise result in undesirable variation in character height. An alternate embodiment uses the flow time, flow rate or flight time information to adjust the charge amplifier gain, rather than the deflection voltage, to achieve the same result.
摘要翻译： 用于喷墨打印机的基于微处理器的控制系统周期性地测量标记液的流速，标记液滴的流动时间或飞行时间，并调整提供给偏转电极的电压，以保持恒定的字符高度，尽管打印机操作环境发生变化 否则会导致字符高度的不良变化。 替代实施例使用流动时间，流量或飞行时间信息来调整电荷放大器增益而不是偏转电压，以获得相同的结果。
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公开(公告)号：US4827280A
公开(公告)日：1989-05-02
申请号：US230750
申请日：1988-08-09
申请人： Michael E. Stamer , Henry F. George
发明人： Michael E. Stamer , Henry F. George
CPC分类号： B41J2/175 , G05D7/0635
摘要： A flow rate control system is disclosed for measurement of ink flow through an ink jet system. The flow rate control system receives an error signal indicative of deviation of flow rate from a set value. The system includes proportional (P), integral (I) and derivative (D) control to generate a control signal based on the magnitude and sign of the error signal. The control signal is used to control the on-time of an ink make-up valve which adds make-up ink to the system as ink is needed to maintain satisfactory operation. In a preferred embodiment, the PID controller has noise reduction capability through the use of clippers and low pass filters. In addition, conditional summation may be employed to minimize "hunting" at low error signal levels.
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