专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4095887A Detector circuit for electrophotographic copier 失效
标题翻译：电子照相复印机检测电路
公开(公告)号：US4095887A
公开(公告)日：1978-06-20
申请号：US710785
申请日：1976-08-02
申请人： Jozef Marie van Herten , Bastiaan Bernard Boele Eertink
发明人： Jozef Marie van Herten , Bastiaan Bernard Boele Eertink
IPC分类号： G03G15/00 , G03G21/14 , G03G21/00
CPC分类号： G03G21/145
摘要： In electrophotographic copying apparatus utilizing a photoconductive belt having markings regularly spaced apart on its back side for control of the copying operations by moving past a detector comprising a light source and a photoelement to generate signal pulses, the detector is made to perform reliably notwithstanding variations of the sensitivity of the photoelement, or of the light emission, by the provision of a circuit for emitting a detector signal proportional to the amount of light sensed by the photoelement together with a signal modifying circuit that maintains an output signal level corresponding to the average value of the detector signal and a control circuit responsive to the output signal level for controlling the intensity of the light source.
摘要翻译：在使用具有在其背面规则间隔开的标记的感光带的电子照相复印设备中，通过移动通过包括光源和光电元件的检测器来控制复印操作以产生信号脉冲，使得检测器尽可能可靠地执行通过提供用于发射与光电元件感测到的光量成比例的检测器信号的电路，以及维持与平均值相对应的输出信号电平的信号修正电路，照明元件的灵敏度或发光的灵敏度的检测器信号和响应于输出信号电平的控制电路来控制光源的强度。

2. 发明授权

US4109134A Power control circuit and electro(photo)graphic apparatus employing same 失效
标题翻译：电源控制电路和电子（照片）图形设备使用
公开(公告)号：US4109134A
公开(公告)日：1978-08-22
申请号：US710398
申请日：1976-08-02
申请人： Jozef Marie Van Herten
发明人： Jozef Marie Van Herten
IPC分类号： G05F1/45 , G05D23/24 , H02H7/12 , H05B1/00 , H05B1/02
CPC分类号： G05D23/24 , H02H7/12
摘要： A circuit for controlling the power transmitted from an a.c. voltage source by a switching element, particularly a triac, connected in series with a power element, e.g. with the heating element of an image fixing device in an electro(photo)graphic copier, is safeguarded against errant operation by the provision of a checking circuit which comprises means for blocking periodically the transmission of power by the switching element under its normal control and means effective in intervals of the interruption of said transmission by the blocking means for detecting whether power is then being transmitted to the power element and, if it then is, producing a corrective control signal.

3. 发明授权

US4095890A Xerographic copying apparatus 失效
标题翻译：静电复印设备
公开(公告)号：US4095890A
公开(公告)日：1978-06-20
申请号：US699652
申请日：1976-06-24
申请人： Jozef Marie van Herten
发明人： Jozef Marie van Herten
IPC分类号： G03G21/00 , G03G15/04 , G03G21/06 , G03G15/00
CPC分类号： G03G15/04036
摘要： Development of a charged photoconductive medium in xerographic copying apparatus is prevented when a properly formed charge image is missing as a result of insufficient imagewise exposure, by a system in which the intensity of the exposing illumination is sensed by a detector such as a photoelectric cell or a phototransistor, and when the illumination is below a level sufficient to form a proper charge image a signal emitted by a detector causes a discharging device such as an A.C. corona or a lamp to discharge the charged medium at a location between the exposure station and the developing station of the apparatus. Means also are provided whereby said signal causes interruption of the feeding of copy material to receive an image, and whereby it causes the execution of a preset copy program to be blocked until the exposing illumination is restored to a proper level of intensity. As a further feature of the invention, the discharging device is a light source which normally is operated at a reduced intensity for effecting an integral exposure of the medium to light after the imagewise exposure, and which is switched to full intensity for discharging the medium when the illumination for imagewise exposure is insufficient.
摘要翻译：通过曝光照明强度由诸如光电池的检测器感测到的系统，当由于不充分的图像曝光而导致适当形成的电荷图像丢失时，可以防止静电复印设备中的带电光导介质的显影光电晶体管，并且当照明低于足以形成适当的电荷图像的电平时，由检测器发射的信号导致诸如AC电晕或灯的放电装置在充电介质之间的曝光站和该设备的开发站。还提供了装置，由此所述信号导致复制材料的馈送中断以接收图像，并且由此其使得预定的复制程序的执行被阻止，直到曝光照明恢复到适当的强度水平。作为本发明的另一个特征，放电装置是通常以降低的强度操作的光源，用于在成像曝光之后实现介质对光的整体曝光，并且其被切换到全强度以便在介质放电时图像曝光的照明不足。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式