公开(公告)号：US3928764A

公开(公告)日：1975-12-23

申请号：US36651073

申请日：1973-06-04

Applicant: HOECHST AG

Inventor： BOCK HARTMUT ,  GOTTE HANS

IPC: G01N23/12 ,  G03G15/08 ,  G01N23/20

CPC classification number: G01N23/12 ,  G03G15/0849 ,  G03G15/0855 ,  G03G15/0889

Abstract: A method of measuring the toner concentration of a developer containing toner circulating in an electrophotographic reproduction machine including preparing a sample from the developer for measurement, arranging the sample so that the toner can be estimated as a proportion of the required toner concentration of the developer, irradiating the sample by Beta rays that are effected by the toner and measuring the Beta -rays being scattered back from the irradiation. An apparatus for measuring the toner concentration of a developer including an endless belt mounted for movement with part of its surface horizontal for forming a uniform layer of developer thereon for measurement, a measuring head as a source of Beta -rays positioned to irradiate the uniform layer of developer, a detector for measuring the effect of the irradiation, an electronic unit responsive to the measured radiation and a toner supply device operable by the electronic unit to replenish toner in the developer when needed. In lieu of the endless belt the photoconductive surface of the electrophotographic reproduction machine may be provided with one or more electrodes to which an electrical potential may be applied.

Abstract translation: 一种测量包含在电子照相复制机中循环的调色剂的显影剂的调色剂浓度的方法，包括从用于测量的显影剂制备样品，布置样品，使得调色剂可以被估计为显影剂所需调色剂浓度的一部分， 通过由调色剂影响的β-射线照射样品，并测量从照射中散射的β-射线。 一种用于测量包括环形带的显影剂的调色剂浓度的装置，所述环形带安装成与其表面的一部分水平运动，以形成用于测量的均匀的显影剂层，测量头作为位于照射均匀层的β射线源 的显影剂，用于测量照射效果的检测器，响应于测量的辐射的电子单元和可由电子单元操作的调色剂供应装置，以在需要时补充显影剂中的调色剂。 代替环形带，电子照相再现机的光导表面可以设置有一个或多个可以施加电位的电极。

公开(公告)号：US3924462A

公开(公告)日：1975-12-09

申请号：US27825472

申请日：1972-08-07

Applicant: HOECHST AG

Inventor： BOCK HARTMUT

IPC: G03G15/00 ,  G03G15/08

CPC classification number: G03G15/0855 ,  G03G15/0891 ,  G03G15/5041

Abstract: A method of measuring or measuring and controlling the toner concentration of a developer circulating in an electrophotographic reproduction machine wherein a test charge pattern based on toner concentration is formed independent of the photoconductor, the test charge pattern is developed together with the photoconductor exposed to produce an image, optical properties of the developed test charge pattern are measured and toner is added to the developer based upon the measurement. An apparatus including electrodes for producing a test charge pattern which are so arranged in the electrophotographic reproduction machine that together with the photoconductor they can be moved past the operative devices in the electrophotographic cycle, sliding contact rings and/or wiper contacts for applying potential to the electrodes from a voltage source and comparative light beams from the same source for carrying out the measurement of a developed test charge pattern. One of the beams is affected by the developed test charge pattern while the other is an unaffected reference beam. The apparatus also may include a controlling device for the addition of toner to the developer which is responsive to the optical property of the test charge pattern.

公开(公告)号：US3910459A

公开(公告)日：1975-10-07

申请号：US29225472

申请日：1972-09-25

Applicant: HOECHST AG

Inventor： BOCK HARTMUT ,  STIEGER HELMUT ,  JAHN HELMUT ,  WINKELMANN DETLEF

IPC: G01N27/60 ,  G03G15/08 ,  B67D5/08 ,  G03G15/16

CPC classification number: G01N27/60 ,  G03G15/0851 ,  G03G15/0891 ,  Y10S222/01

Abstract: A method and apparatus for measuring or measuring and replacing the amount of toner consumed in an electrophotographic reproduction machine wherein the method involves measuring an electrical value corresponding to the charge transferred in a copying operation by the toner to the photoconductor. The electrical value measured is the voltage at a high-resistance resistor through which current flows to the ground from an element charged with a charge corresponding to the transferred charge or the voltage at a capacitor charged from an element that is itself charged with a charge corresponding to the transferred charge or the charge flow from or to the conductive carrier material of the photoconductor. The corresponding charge is the residual charge of carrier material from which toner has been withdrawn by the photoconductor. In response to the measurement an amount of toner is dispensed to the machine which may be intermittent after and in accordance with integration of the charge transferred during the interval between dispensing operations. The apparatus includes an insulated electrically conductive element to receive a charge of the same magnitude as the charge passed to the photoconductor and a measuring instrument which is connected to a toner dispensing device dependent for delivery of toner on the measurement. The conductive element is composed of one or more well insulated deflector sheets fitted in a cascade developing unit wherein the sheets are positioned below the developing zone of the unit so that the spent developer trickles over the sheets beyond the developing zone. The apparatus may also include two toner dispensing devices one of which is dependent upon the number of copies and the other is dependent upon the charge on a capacitor.

Abstract translation: 一种用于测量或测量和替换在电子照相再现机中消耗的调色剂量的方法和装置，其中所述方法包括测量与通过调色剂复印到感光体的复印操作中转印的电荷相对应的电值。 所测量的电气值是电流从高电阻电阻流过的电流，从电荷流过对应于转移电荷的电荷的元件或电容器充电的电容器，该元件本身带有相应的电荷 转移到光电导体的导电载体材料的转移电荷或电荷流。 相应的电荷是由光电导体从其中抽出调色剂的载体材料的剩余电荷。 响应于测量，调色剂的量被分配到机器，其可以在分配操作之间的间隔期间并且根据在分配操作之间的间隔期间传送的电荷的积分而间歇。 该装置包括绝缘导电元件，以接收与传递到光电导体的电荷相同大小的电荷;以及测量仪器，其连接到依赖于在测量上传送调色剂的调色剂分配装置。 导电元件由安装在级联显影单元中的一个或多个良好绝缘的偏转片构成，其中片位于单元的显影区下方，使得废显影剂在片材上超过显影区域。 该设备还可以包括两个调色剂分配装置，其中一个取决于副本数量，另一个取决于电容器上的电荷。