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公开(公告)号：FR2325966A1
公开(公告)日：1977-04-22
申请号：FR7626311
申请日：1976-08-25
Applicant: IBM
Inventor： ABBOTT JERRY J , CAMPBELL CHARLES A , CAUDILL ALLISON H , THOMPSON JOHN A
Abstract: An auger fed magnetic brush developer wherein two parallel augers continuously recirculate the developer mix and cause the mix to be enriched with toner prior to its being returned to the magnetic brush roll.
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公开(公告)号：CA1094796A
公开(公告)日：1981-02-03
申请号：CA279117
申请日：1977-05-25
Applicant: IBM
Inventor： ABBOTT JERRY J , CAUDILL ALLISON H
IPC: G03G15/09
Abstract: GROOVED MAGNETIC BRUSH ROLL For use in an electrophotographic copy machine utilizing magnetic brush roll development, an improved hollow magnetic roll made of non-magnetic material containing axially located grooves along the exterior periphery. The grooves are spaced in a range from 15-25 times the diameter of the permeable carrier beads used in the development process and the lands between grooves are polished to a high drgree, e.g., 25 .mu.inches. The depth of the grooves is to a minimum of 1-2 times bead diameter while the groove width is to a minimum of 2-3 times bead diameter. BO976048
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Patent Agency Ranking
公开(公告)号：CA1078169A
公开(公告)日：1980-05-27
申请号：CA262155
申请日：1976-09-27
Applicant: IBM
Inventor： ABBOTT JERRY J , CAMPBELL CHARLES A , CAUDILL ALLISON H , THOMPSON JOHN A
Abstract: MAGNETIC BRUSH DEVELOPER An auger fed magnetic brush developer wherein two parallel augers continuously recirculate the developer mix and cause the mix to be enriched with toner prior to its being returned to the magnetic brush roll. A supply auger communicates with the brush roll along its entire length and directly elevates the mix to a lower part of the brush roll's surface. This supply auger includes four flutes of a pitch equal to one-half the length of the brush roll. This auger flute arrangement insures that a uniform supply of mix is presented to the brush roll along its entire length. In addition, this supply auger construction insures that a uniform supply of enriched mix is presented to the brush roll along its entire length, since the gradually depleting carrier tends to be presented to the brush roll a minimum number of times, for example three, prior to its exiting one end of the supply auger. The carrier exiting the supply auger enters a turnaround compartment whereat new toner is added. The depleted carrier and new toner is mixed by a return auger. To insure adequate triboelectric agitation, the return auger includes two flutes of a pitch equal to that of the supply auger. The two augers are rotated at different flute and pitch related speeds which insure equal flow through the augers. The two augers are of equal length, and are longer than the brush roll. The two augers are mounted in axially offset fashion, with the opposite end of each auger substantially coextensive with opposite ends of the brush roll, and with the other end of each auger extending into end disposed turnaround compartments. -1a-
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公开(公告)号：CA1132827A
公开(公告)日：1982-10-05
申请号：CA307348
申请日：1978-07-13
Applicant: IBM
Inventor： ABBOTT JERRY J , FULLER STERRITT R , JACHIMIAK PAUL D
Abstract: ELECTROPHOTOGRAPHIC TONER A toner material for use in developing images in an electrostatographic device is disclosed. The toner particles are initially classified according to a size distribution wherein less than 15% by weight are greater than 16 microns, between 7 and 15% by weight are less than 5 microns the remainder being from 5 to 16 microns and wherein the median particle size by weight is from 8 to 12 microns. The toner is used in a developer mix with carrier particles, and preferably the toner carrier mix is equilibrated such that the action of the developer mix and the machine provide a toner particle size distribution wherein less than 12% by weight are greater than 16 microns, between 15 and 30% by weight are less than 5 microns, the remainder being from 5 to 16 microns, and wherein the median particle size by weight is between 6.5 and 9.5 microns. An equilibrated toner particle distribution is also disclosed.
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公开(公告)号：CA1108844A
公开(公告)日：1981-09-15
申请号：CA309376
申请日：1978-08-15
Applicant: IBM
Inventor： ABBOTT JERRY J , BERNARDELLI WILLIAM J , CAUDILL ALLISON H , THOMPSON JOHN A
IPC: G03G15/09
Abstract: ELECTROPHOTOGRAPHIC DEVELOPER WITH CARRIER OVERFLOW CONTROL A magnetic-brush developer for use in an electrophotographic machine wherein the magnetic brush is used to transport toner-coated carrier particles to an elevated development zone from a pickup zone. A path for so moving the carrier is provided between the magnetic brush roll and an overflow plate, the lower end of which also serves as a doctoring blade. The carrier is moved to the top of the roll where a doctoring blade limits the amount of carrier entering the development zone. Excess carrier is accumulated in an expanded spatial area near the doctoring blade and returned to the vicinity of the pickup zone by falling back between the overflow plate and the housing. An area is provided near the doctoring blade at the top of the roll where no magnetic field is present. The overflow plate is made of non-magnetic material.
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公开(公告)号：CA1132828A
公开(公告)日：1982-10-05
申请号：CA338284
申请日：1979-10-24
Applicant: IBM
Inventor： ABBOTT JERRY J , CROSSAN STEPHEN C , FULLER STERRITT R JR , JACHIMIAK PAUL D
Abstract: ELECTROPHOTOGRAPHIC TONER AND CARRIER A developer material comprising toner particles and coated carrier beads for use in developing images in an electrostatographic device is disclosed. The toner particles are initially classified according to a size distribution wherein less than 15% by weight are greater than 16 microns, between 7 and 15% by weight are less than 5 microns, the remainder being from 5 to 16 microns; and wherein the median particle size by weight is from 8 to 12 microns. The coating of the carrier beads is a mixed resin system comprising 5 to 55% by weight polytetrafluoroethylene, 5 to 55% by weight fluoronatedpolyethylenepropylene, and 40% to 80% by weight of a poly (amide-imide) resin which is stable up to at least 600.degree.F, triboelectrically negative (with respect to the herein described toner), nonspalling, essentially nonfriable and dispersible with the other resin components. Also, preferably the coating includes a pigment, such as TiO2, dispersed in the resin system. BO9-77-065
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公开(公告)号：FR2412876A1
公开(公告)日：1979-07-20
申请号：FR7832171
申请日：1978-11-06
Applicant: IBM
Inventor： ABBOTT JERRY J , BERNARDELLI WILLIAM J , CAUDILL ALLISON H , THOMPSON JOHN A
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