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公开(公告)号：US3568027A
公开(公告)日：1971-03-02
申请号：US3568027D
申请日：1969-11-18
Applicant: IBM
Inventor： BACON JAMES L , CLEAVE GEORGE W
CPC classification number: H02P7/288 , H02P7/2885 , Y10S388/902 , Y10S388/91 , Y10S388/917 , Y10S388/934
Abstract: The invention concerns a motor control circuit especially useful with small direct-current-type motors and featuring a symmetrical circuit topology that achieves motor regulation and temperature compensation in a simplified manner. The circuit includes an upper portion comprising a motor model section for establishing a reference voltage to determine the speed of the motor, a parallel circuit section including the motor itself, a lower section intended for detection of current changes in the motor section, and a difference amplifier interconnected with the motor model and motor sections for maintaining an essentially zero potential difference between these sections. The symmetrical layout achieves a highly accurate measure of control over motor speed once a nominal speed has been established. Due to the symmetrical configuration of the circuit, effects of temperature and humidity are essentially eliminated. Some provision is made for alternative ways of controlling the desired motor speed including a variable control for changing motor speed in a regular fashion throughout a desired range of speeds.
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公开(公告)号：US3884572A
公开(公告)日：1975-05-20
申请号：US31797472
申请日：1972-12-26
Applicant: IBM
Inventor： BACON JAMES L , SIMPSON HENRY W
CPC classification number: G03G21/0058
Abstract: A cleaning apparatus for cleaning the residual toner image from an electrostatic plate of an electrostatic reproduction apparatus incorporates a continuous wiper member having an outer layer of a compliant material which has a resistivity of less than 10 8 ohm.- centimeters and an outer skin thereon. The wiper member is connected to ground. As the wiper member wipingly engages the toner particles, the toner partricles are mechanically dislodged from the surface of the electrostatic plate. Additionally, an image charge is produced on the outer skin surface of the conductive wiper member equal to but opposite in sign from the charge on the toner particles in proximity therewith. This image charge causes the toner particles to adhere to the skin surface as the wiper member moves away from the electrostatic plate regardless of the sign of the toner charge. A further cleaning member is utilized to remove the toner particles from the skin surface of the wiper member which travels in a closed loop past the electrostatic plate and the further cleaning member.
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公开(公告)号：CA1159549A
公开(公告)日：1983-12-27
申请号：CA362727
申请日：1980-10-20
Applicant: IBM
Inventor： BACON JAMES L
Abstract: An apparatus and method for improving the print quality of a coarse scan/fine print image processing device. The apparatus includes an encoder which assigns a code to a coarsely scanned picture element (PEL). The assigned code is representative of the reflectance characteristic of the PEL. For fine reproduction of coarsely scanned data, the coarsely scanned PEL is summed with at least four adjacent horizontal and vertical PELs to reproduce a fine PEL comprising of at least four subelements. B0978063
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公开(公告)号：CA1033405A
公开(公告)日：1978-06-20
申请号：CA187406
申请日：1973-12-05
Applicant: IBM
Inventor： BACON JAMES L , SIMPSON HENRY W
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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5.发明专利
公开(公告)号：CA1114012A
公开(公告)日：1981-12-08
申请号：CA307365
申请日：1978-07-13
Applicant: IBM
Inventor： BACON JAMES L , ERNST LARRY M , HAUPTMAN WILLIAM G
Abstract: An improved regulated power supply for a Corona Charging Unit. More specifically, a digitally regulated power supply for the corona charging unit of an electrostatic copying machine in which a sample of the ionic current of the corona unit is utilized in conjunction with digital regulator means to regulate the power supply means establishing the charge of the corona. The digital regulator means in conjunction with at least one pulse width modulated power supply permits very fast rise and fall times of the power supply current. Thus, the ability to switch "corona's" on and off in an area of the photoconductor much narrower in width than the width of the corona unit is provided. Further, between duty cycles of the machine, the regulator stores a representation of the correct operating point of the corona charging unit determined in the immediately prior duty cycle. In the next duty cycle, the representation is utilized to initially regulate the power supply. The regulated power supply although having particular merit and utility when employed in a xerographic copier, or the like, also may be advantageously employed, with or without obvious modification in numerous other types of apparatus, e.g.. servomechanisms, printed circuit motor driver, Precipitrons. etc.
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Patent Agency Ranking
公开(公告)号：FR2327701A1
公开(公告)日：1977-05-06
申请号：FR7627612
申请日：1976-09-06
Applicant: IBM
Inventor： BACON JAMES L , SPEARS JESSE W
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：CA1092639A
公开(公告)日：1980-12-30
申请号：CA250130
申请日：1976-04-13
Applicant: IBM
Inventor： SMITH GERALD L , BACON JAMES L
Abstract: PHOTOCONDUCTOR CHARGING TECHNIQUE In an electrophotographic copying device having charging, imaging, developing, transferring, precleaning and cleaning facilities, the arrangement being in the conventional sense, but incorporates a combined charging and precleaning unit that is operable to perform either the charging function or the precleaning function at the proper time during the copying/cleaning cycle. A combined precharging/transferring unit is also incorporated to facilitate precharging or transferring at a predetermined time during the copying process.
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公开(公告)号：CA1010493A
公开(公告)日：1977-05-17
申请号：CA158260
申请日：1972-12-05
Applicant: IBM
Inventor： BACON JAMES L , QUEENER CARL A , SIMPSON HENRY W
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：CA908264A
公开(公告)日：1972-08-22
申请号：CA908264D
Applicant: IBM
Inventor： BACON JAMES L , CLEAVE GEORGE W VAN
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公开(公告)号：CA1075762A
公开(公告)日：1980-04-15
申请号：CA262577
申请日：1976-10-01
Applicant: IBM
Inventor： BACON JAMES L , SPEARS JESSE W
Abstract: APPARATUS AND METHOD FOR NEUTRALIZING STATIC CHARGES IN SHEET/WEB FEEDING DEVICES 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 BO974-047 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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