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公开(公告)号：US3821938A
公开(公告)日：1974-07-02
申请号：US20904071
申请日：1971-12-17
Applicant: IBM
CPC classification number: G05D7/0605 , G03G15/0851 , G03G15/0891 , G03G2215/0636
Abstract: A toner usage sensing system for an electrostatic reproduction apparatus which utilizes multicomponent developer material including electrostatically charged toner to develop electrostatic latent images on a photosensitive plate directly senses the amount of toner consumed by the reproduction process. Since the average toner body charge (coulomb/gram) is constant for a given desired toner concentration, the weight of the electrostatically charged toner consumed in sensed by measuring the charge removed from the developer material during the reproduction process. The developer unit containing the developer material is electrically isolated from the remainder of the reproduction apparatus and grounded through a single connection. The current in the ground connection returns charge to the developer unit sufficient to replace the charge removed and is sensed to obtain a measurement of the toner consumed. A measured amount of toner is added to the developer material when a preselected amount of charge has been sensed as being removed. In one embodiment, a DC motor drives the toner replenisher and rotates an amount proportional to the sensed current thereby providing a mechanical storage of the incremental amounts of toner removed on widely spaced reproduction runs.
Abstract translation: 用于静电再现装置的调色剂使用感测系统，其利用包含静电荷调色剂的多组分显影剂材料在感光板上显影静电潜像，直接感测再现过程消耗的调色剂量。 由于对于给定的期望的调色剂浓度，平均调色剂体积（库仑/克）是恒定的，所以通过测量在再现过程中从显影剂材料中除去的电荷而感测到的带静电的调色剂消耗的重量。 包含显影剂材料的显影剂单元与再现设备的其余部分电隔离，并通过单个连接接地。 接地连接中的电流将显影单元的电荷返回到足以替换去除的电荷并被感测以获得消耗的调色剂的测量值。 当感测到预选量的电荷被去除时，将测量量的调色剂加到显影剂材料上。 在一个实施例中，DC马达驱动调色剂补充器并旋转与感测电流成比例的量，由此提供在广泛间隔的再现运行中去除的增量的调色剂的机械存储。
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公开(公告)号：BR7606691A
公开(公告)日：1977-11-16
申请号：BR7606691
申请日：1976-10-06
Applicant: IBM
Abstract: A corona and associated electrical drive as shown herein, neutralize the static charges on non-conductive sheets or webs. The neutralization of static charge is accomplished by passing the material to be neutralized under a double wire corona. Both wires in the corona are connected to an AC signal. The AC signal drives both wires with a signal that alternates in polarity at frequency f. The wires are spaced apart a predetermined distance calculated from a function dependent upon the frequency of the AC signal and the speed of the paper moving under the corona wires. The predetermined distance is such that a given area of the paper will pass under one wire at a first polarity and under the second wire at the opposite polarity. Further enhancement of neutralization can be accomplished by using a second double wire corona out of phase with the first double wire corona. In addition the sheet or web as it passes under the corona wires is supported to prevent static charge on the support from balancing a static charge on the sheet or web. Accordingly, the only static charge present as the sheet or web moves under the corona is that charge carried by the sheet or web. The corona wires will neutralize that charge either by discharging it with oppositely charged ions or depositing oppositely charged ions to balance the charge already on the sheet or web. Thus as the sheet or web moves away from the neutralizing station the sheet or web has a net charge which is substantially zero.
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公开(公告)号：BR7208877D0
公开(公告)日：1974-01-03
申请号：BR887772
申请日：1972-12-15
Applicant: IBM
Abstract: A toner usage sensing system for an electrostatic reproduction apparatus which utilizes multicomponent developer material including electrostatically charged toner to develop electrostatic latent images on a photosensitive plate directly senses the amount of toner consumed by the reproduction process. Since the average toner body charge (coulomb/gram) is constant for a given desired toner concentration, the weight of the electrostatically charged toner consumed in sensed by measuring the charge removed from the developer material during the reproduction process. The developer unit containing the developer material is electrically isolated from the remainder of the reproduction apparatus and grounded through a single connection. The current in the ground connection returns charge to the developer unit sufficient to replace the charge removed and is sensed to obtain a measurement of the toner consumed. A measured amount of toner is added to the developer material when a preselected amount of charge has been sensed as being removed. In one embodiment, a DC motor drives the toner replenisher and rotates an amount proportional to the sensed current thereby providing a mechanical storage of the incremental amounts of toner removed on widely spaced reproduction runs.
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公开(公告)号：BR7308948D0
公开(公告)日：1974-08-15
申请号：BR894873
申请日：1973-11-14
Applicant: IBM
Abstract: 1411198 Cleaning xerographic apparatus INTERNATIONAL BUSINESS MACHINES CORP 7 Dec 1973 [26 Dec 1972] 56807/73 Heading G2H Charged toner particles 51, 52 are removed from the surface 11 of a xerographic drum by a wiper band formed from a compliant material having a resistivity not greater than 10 8 ohm centimetres that is moved in a closed loop to wipe the surface 11, while a cleaner device removes from the band particles transferred thereto and an electric current is applied to the band proportional to the image charge of the particles in contact therewith. The band may form the outer layer 35 of a roller 31 having a metal core 37 and a compliant foam layer 39, or it may be a belt 75 Figs. 3 and 4 respectively. The cleaner device may comprise a scavenger roller 41, Fig. 3, or a scraper blade 43, Fig. 4. The current supply source 47 may consist of a connection to earth where the toner particles 51, 52 are of mixed polarity, e.g. where they have been subjected to an A.C. pre-clean corona, but preferably the particles are subjected to a positive pre-clean corona and the current source 47 is at a low negative D.C. potential. The outer layer 35 of the roller 31 may be a carbon filler silicone rubber, or conductive forms of neoprene, polyurethane or ethylene/propylene copolymer. The specification also discloses suitable developer compositions for magnetic brush development of latent images on the xerographic drum.
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