EP1156380A2 - Elektrofotografische Prozesssteuerung und diagnostisches System - Google Patents
Elektrofotografische Prozesssteuerung und diagnostisches System Download PDFInfo
- Publication number
- EP1156380A2 EP1156380A2 EP01111173A EP01111173A EP1156380A2 EP 1156380 A2 EP1156380 A2 EP 1156380A2 EP 01111173 A EP01111173 A EP 01111173A EP 01111173 A EP01111173 A EP 01111173A EP 1156380 A2 EP1156380 A2 EP 1156380A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- photoconductive element
- marking apparatus
- reference voltage
- charging station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004886 process control Methods 0.000 title description 4
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000003550 marker Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 24
- 238000012546 transfer Methods 0.000 description 11
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- 230000005540 biological transmission Effects 0.000 description 7
- 238000011161 development Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
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Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
- G03G15/5037—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor the characteristics being an electrical parameter, e.g. voltage
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00025—Machine control, e.g. regulating different parts of the machine
- G03G2215/00029—Image density detection
- G03G2215/00033—Image density detection on recording member
- G03G2215/00054—Electrostatic image detection
Definitions
- the present invention relates to electrophotographic marking apparatus, in particular testing subsystems of the electrophotographic process and creating Setting operations for certain subsystems in relation to predetermined ones Parameters.
- the electrophotographic marking process is relatively complicated and involves one Variety of subsystems, each of which must work properly. This one Subsystems are interconnected, however, it is often difficult to function as one diagnose and isolate specific subsystem. This is especially true for electrophotographic imaging and image development processes as an investigation in the case of room lighting with the naked eye is mostly impossible.
- the object of the present invention is therefore an analysis and diagnostic To create test method with which certain subsystems with satisfactory Operating parameters can be compared and suitable remedial measures can be taken.
- the present invention provides optional electrophotographic control Marking apparatus that enables a functional test of the subsystems.
- the invention provides an automatic Subsystem function test ready and thus complements subsystem-specific diagnostics and review programs.
- the present invention provides a reference voltage on a photoconductor element, such as. a ribbon, the ribbon being at a predetermined in non-printing operation Subsystem is passed, the resulting voltage measured and with predetermined acceptable limits are compared. Then there is one Regeneration cycle provided so that the electrophotographic marker is on Printing operation can be made.
- FIG. 1 An electrographic marking apparatus 10 is shown in FIG. 1.
- the present Invention is based on a special electrographic marking apparatus 10, such as e.g. a copier or printer. Still, it should be noted that, though the invention is suitable for use in such apparatus, but also with other types can be used by electrophotographic copiers and printers.
- a movable image bearing element e.g. a photoconductive tape 18 around a variety of Tensioned rollers, one of which is driven by a motor, pass the belt at a number of processing stations of the printer.
- the image carrier element can also be designed as a drum.
- the logic and control unit (LCU) 24 which can include a digital computer, assigns a stored program successive actuation of the different processing stations or subordinate systems of the apparatus 10.
- a charging station makes the belt 18 photosensitive by applying a uniform electrostatic charge of a predetermined primary voltage V 0 to the surface of the belt.
- the power of the first charging station is regulated by a programmable controlled power supply 30, which in turn is controlled by the LCU 24 in order to set the primary voltage V 0, for example by controlling the electrical potential (V Grid ) on a grid electrode 28b, which controls the movement of the charged ions that is caused by the operation of the charging wires 28a on the surface of the support member.
- a negative electrical bias is present at the grid electrodes 28b, for example between -350 and -750 volts; a target bias can be -500 volts.
- the projected light from a write head 34 modulates the electrical charge on the photoconductive belt 18 to form a latent electrostatic image to generate a document to be copied or printed.
- the print head points preferably a series of light emitting diodes (LEDs) or another Light source, e.g. a laser or other exposure source to expose the photoconductive tape.
- the exposure takes place picture element (pixel) for picture element with a regulated in accordance with the signals from the LCU to the write head interface 32 Intensity, the write head interface being a programmable control unit includes.
- the exposure can be carried out by optical projection of an image of a Document made on the photoconductor 18.
- the image data to be recorded from a data source 36 for generating electrical Image signals e.g. from a computer, a document scanner, a memory or a data network.
- Signals from the data source and / or LCU can also output control signals to a writer network, etc.
- the movement of the belt 18 in the direction of the arrow A leads the areas that carry the latent electrostatographic charge images past a developer station 38.
- the toner or developer unit has one or more (several with different colors) magnetic brushes next to, but at a distance from the belt.
- Magnetic brush developer units are known from US 4,473,029 and 4,546,060.
- the LCU 24 optionally operates the developer unit in relation to the areas of the image gliding past that carry the latent images.
- the Magnetic brush either in contact with or at a short distance from belt 18 brought.
- the charged toner particles of the contacted magnetic brush are called Image is drawn onto the latent image pattern to develop the pattern. In doing so also developed the calibration marks used for process control.
- the conductive parts of the developer unit act as electrodes.
- the electrodes are connected to a variable supply of DC potential V B , which is regulated by a programmable controller 40.
- V B DC potential
- DAD development of the discharged area
- Other types of Developer units are known and can also be used.
- a transmission unit 46 is provided to transmit one Recording sheet S in register with the image in contact with the light-guiding element bring.
- the image is placed on a recording sheet, e.g. made of paper, or transfer a plastic sheet.
- the transmission unit comprises a transmission corona charger 47.
- the toner image is transferred electrostatically with a suitable voltage, which is applied to the transfer charger 47 to supply a constant current generate as described below.
- the back of the receiver sheet is in this Example charged with a positive charge by the transfer charging device, contacts the toner image on the photoconductor element during the recording sheet in order to Drag the toner image onto the recording sheet.
- the recording sheet can be made using a known (not )) non-stick corona charger can be released from the belt 18.
- a Cleaning brush 48 or a knife is also arranged downstream of the transmission unit provided to remove the toner from the belt 18 so as to be reusable the surface for forming additional images is made possible.
- a charging device 43 is provided, in this case positive charge on the Neutralize light guide element or the electrostatic adhesion of the remaining particles to reduce the volume 18.
- the tension of cleaning and Preparation charger is controlled by a power supply 42. While separate power supplies for each charger can be shown, one Power supply with several supply lines instead of several Power supply devices are used.
- the Receiving sheet After transferring the unfixed toner images to a recording sheet, the Receiving sheet transported to a melting unit 49, on which the image is fixed.
- a densitometer 76 is between the developer unit 38 and the transfer unit 46 arranged.
- the densitometer 76 monitors the development of the areas of the light-conductive tape 18, as is known from the prior art.
- a second sensor which is also preferably provided for process control, is an electrostatic voltage meter 50.
- a voltage meter is preferably located downstream of the first charging station 28 in order to provide readings of measured V 0 s or V 0 (m) s.
- the voltmeter is preferably fixed in relation to the band 18, thus reducing problems with the alignment and settings associated with the portable voltmeter, particularly with respect to the band 18.
- the voltmeter (electrometer) 18 can handle both polarities of the voltage measure and is therefore used to determine all voltage tests.
- the output V 0 (m) s and densities, which the densitometer 76 determines, are fed to the LCU 24, which generates new setpoints for E 0 , V 0 , V 0 and the actuation of the toner replenishment in accordance with a process control program.
- the process controller can be used to adjust the transmission current generated by the transfer charger 46 by changing the programmable power supply 51.
- a preferred electrometer is described in US 5,956,544.
- the apparatus 24 can be defined as a variety of subsystems including but not limited to, the general descriptions of a cargo system, one Exposure unit, a developer subsystem, a transmission subsystem, one Post-treatment subsystem, a meltdown subsystem, these subsystems the components described above, e.g. the photoconductor, the first charging station, the bias shift, the post-treatment charging station and the transfer rollers include.
- the LCU 24 provides overall control of the device and its different child systems.
- Programming commercially available Microprocessors are familiar to the person skilled in the art. The following revelation aims to enable a programmer to create a suitable control program for to write such a microprocessor.
- the logical links described in this document can be left out of microprocessors also from or in cooperation with non-programmable (hardware) or programmable logic devices can be created.
- programmable logic devices To the precisely control the timing of the various processing facilities, are usually encoders in conjunction with indicators on the photoconductor used to provide timely signals indicating the frame areas and their position show in relation to the different units. Other types of control for timing of operations can also be used.
- the typical LCU 24 includes a temporary data memory 152, the central processing unit 154, the process and event check module 155, timing and cycle control unit 156 and the stored program control 158.
- the data input and output takes place sequentially based on or under the supervision of the program control.
- Input data is either stored in one by the input signal latch 160 Input data processor 162 fed or by an interrupt signal processor 164.
- the input signals are from various switches, sensors and analog-to-digital Transducers that are part of the apparatus 10 derived or from external sources passed it on.
- the output data and control signals are immediately or fed into suitable output drivers 168 by a catch register 166.
- the Output drivers are connected to the appropriate subordinate systems.
- the LCU 24 is set up to perform a series of subsystem tests performs. By performing these tests, the LCU 24 ensures the normal Printing operation of the apparatus 10. In addition, the LCU 24 is set so that the Operates apparatus in test mode, whereby the entire photoelectric process is carried out becomes.
- the LCU 24 is generally like this set to generate a predetermined tension on the belt 18 and subsequently selects a specific subsystem, the subsystem selecting one corresponding deviation in the belt tension generated.
- the LCU 24 causes one Rotation of the belt 18 to the voltmeter 50, where the resulting belt tension is measured.
- the measured voltage is determined by the LCU 24 with a predetermined one Compare a range of allowable values.
- the deviation is reported to the engineer passed on site when the measured voltage is outside the predetermined Frame.
- the LCU 24 is also set so that the non-tested subsystems are isolated to reduce the risk of damage to certain subsystems.
- the LCU 24 also includes regeneration operations that each of the Subsystem check operations correspond.
- the regeneration processes can the apparatus 10 return to normal printing.
- the Regeneration operations the apparatus 10 for testing additional subsystems to prepare.
- 3 is a flowchart of the process and process check program of FIG LCU 24 shown.
- the LCU 24 measures a voltage of the first charging station and stores one resulting voltage on the photoconductor element, as at the electrometer 50 was measured.
- the voltage of the photoconductor element is measured with the voltage compared to determine charge efficiency.
- an increase in charge efficiency shows an increased contamination in the first charging station.
- the exit test / first test thus enables one On-site engineer to check the functionality of the first charging station.
- the reference voltage is achieved by setting the grid voltage of the first charging station as follows: in which is the charge efficiency determined from the values obtained when testing the first charging station.
- the LCU thus ensures that every test is standardized to a known and specific reference voltage.
- the electrophotographic marking apparatus 10 is not in the printing mode and the reference voltage V 0 is transferred to the tape 18.
- a particular subassembly is then switched which creates a voltage on the photoconductive belt 18 or transmits it to the belt 18.
- the LCU 24 then sets the tape 18 in rotation along its path so that the resulting tension on the tape is measured on the electrometer 50. That is, the LCU 24 ensures that the resulting voltage is brought to the electrometer 50 instead of moving the electrometer to the resulting voltage.
- the resulting voltage of the photoconductive element 18 is then measured with a predetermined set of acceptable voltages compared to establish criteria who decide on the further process.
- the operator is aware of the deviation of the measured voltage from the certain subsystem made accessible so that predictions about its lifespan can be employed.
- all of exams A through J are consecutive carried out.
- the exams can be isolated from each other in order to Optimize the diagnosis of the apparatus 10.
- the subsystem tests G-J are evaluated by the electrometer 50, which on End of the exposure process is arranged.
- the sequencing of the machine is like this selected these charges for only one photoconductor rotation without the first charging station treated to prevent the photoconductive properties of the photoconductor Damage is inflicted. This process is initiated by the timing of the LCU 24, which the check routines of the operation are determined.
- the Tests G through J advance test F to measure current cargo efficiency.
- the subsystems can be located at certain points on the photoconductor path activated and reactivated. Furthermore, the electrometer measurements be synchronized so that the collected data of the particular Subsystem check conform.
- the LCU 24 is set to perform extensive self-tests of the subsystems that are involved in the generation of an output image.
- the The LCU 24 process check program ensures that the subsystems responsible for the Imaging are necessary (such as the first charging station, the bias offset and the exposure) are functional.
- you will find the program exams that go with it serve to determine whether the subsystems that do not directly contribute to image generation (such as post-treatment charging station, pre-cleaning charging station, post-development deletion and carrier particle removal bias), in the normal Operating tolerances or conditions are.
- the data obtained in each subsystem check are with the normal Operating values and applicable error limits compared to a status passed or Fail to determine for each exam. This way a service technician can quickly determine which subsystems are within acceptable limits move, and determine the relative life of other subsystems.
- the LCU 24 places the electrophotographic marking apparatus 10 in a normal one Printing plant in which a user uses the apparatus for his task of generating can use electrophotographically produced copies or prints. Additionally poses the LCU 24 the apparatus 10 in a non-printing operation, which is optionally by the LCU is controlled to enable subsystem analysis.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
Description
- Fig. 1
- eine schematische Seitenansicht eines typischen elektrofotografischen Markierungsapparats, auf den die vorliegende Erfindung anwendbar ist.
- Fig. 2
- ein Blockdiagramm einer Logik- und Steuereinheit von Fig. 1.
- Fig. 3
- ein Flussdiagramm eines Teils der Vorgänge, die von der Logik- und Steuereinheit ausgeführt werden.
Magnetbürstenentwicklereinheiten sind aus der US 4,473,029 und 4,546,060 bekannt.
- 10
- Markierungsapparat
- 18
- fotoleitfähiges Band
- 24
- Logik- und Steuereinheit (LCU)
- 28
- erste Ladestation
- 28a
- Aufladedrähte
- 28b
- Gitterelektroden
- 30
- Stromversorgung
- 32
- Schnittstelle
- 34
- Schreibkopf
- 36
- Datenquelle
- 38
- Entwicklereinheit
- 40
- programmierbare Steuerung
- 42
- Stromversorgung
- 43
- Ladeeinrichtung
- 46
- Übertragungseinheit
- 47
- Coronalader
- 48
- Bürste
- 49
- Einschmelzeinheit
- 50
- Sensor
- 51
- Stromversorgung
- 76
- Densitometer
- 152
- temporären Datenspeicher
- 154
- zentrale Verarbeitungseinheit
- 155
- Prozess- und Vorgangsprüfmodul
- 156
- Zeitabstimmungs- und Zyklussteuereinheit
- 158
- gespeicherte Programmsteuerung
- 160
- Eingabesignalzwischenspeicher
- 162
- Eingabedatenprozessor
- 164
- Unterbrechungssignalprozessor
- 166
- Auffangregister
- 168
- Ausgangstreiber
- S
- Bogen
Claims (13)
- Verfahren zum Betreiben eines elektrofotografischen Markierungsapparats (10), das die folgenden Verfahrensschritte umfasst:(a) Bestimmen einer Ladungseffizienz zwischen einer ersten Ladestation (28) und einem fotoleitenden Element (18),(b) Erzeugen einer Referenzspannung auf dem fotoleitenden Element (18), wobei die Referenzspannung der Ladungseffizienz entspricht,(c) Betreiben eines ersten Untersystems (28, 28a, 28b, 30) in einem Nicht-Druckbetrieb zum Erzeugen einer ersten resultierenden Spannung auf dem fotoleitenden Element (18), und(d) Transportieren des fotoleitenden Elements (18) an einen ortsfesten Sensor (50) zum Messen der ersten resultierenden Spannung.
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass in einem weiteren Verfahrensschritt der elektrofotografische Markierungsapparat (10) auf Druckbetrieb eingestellt wird. - Verfahren nach einem der Ansprüche 1 bis 2,
dadurch gekennzeichnet, dass die Referenzspannung auf dem fotoleitenden Element (18) wiederhergestellt und ein zweites Untersystem (46, 47, 51) unabhängig von dem ersten Untersystem (28, 28a, 28b, 30) betrieben wird, um eine zweite resultierende Spannung auf dem fotoleitenden Element (18) zu erzeugen. - Verfahren zum Auswerten eines elektrofotografischen Markierungsapparats (10), welches die folgenden Verfahrensschritte umfasst:(a) Einstellen des elektrofotografischen Markierungsapparats (10) auf normalen Druckbetrieb,(b) Anwählen einer Nicht-Druckeinstellung des elektrofotografischen Markierungsapparats (10),(c) Messen einer Spannung auf einem fotoleitenden Element (18) in Reaktion auf die Nicht-Druckeinstellung, und(d) Wiedereinstellen des elektrofotografischen Markierungsapparats (10) auf normalen Druckbetrieb.
- Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass das Anwählen einer Nicht-Druckeinstellung des elektrofotografischen Markierungsapparats (10) das Erzeugen einer vorbestimmten Spannung auf einem fotoleitendem Element (18) in dem Apparat (10) umfasst. - Verfahren nach einem der Ansprüche 4 bis 5,
dadurch gekennzeichnet, dass die Spannung auf dem fotoleitenden Element (18) in Reaktion auf eine vorbestimmte festgesetzte Referenzspannung gemessen wird. - Verfahren nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass ein Untersystem (46, 47, 51) des Apparats (10) aktiviert wird, welches eine Spannung auf dem fotoleitenden Element verändert. - Verfahren nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet, dass eine Referenzspannung auf dem fotoleitenden Element (18) erzeugt wird, bevor eine Spannung auf einem fotoleitenden Element (18) in Reaktion auf die Nicht-Druckeinstellung gemessen wird. - Verfahren zum Analysieren eines elektrofotografischen Markierungsapparats (10), welches den folgenden Verfahrensschritt aufweist:
(a) Messen einer resultierenden Spannung auf einem fotoleitenden Element (18) in Reaktion auf eine Referenzspannung auf dem fotoleitenden Element (18), wobei die Referenzspannung einer Ladungseffizienz einer ersten Ladestation (28) entspricht. - Verfahren nach einem der Ansprüche 1 bis 9,
dadurch gekenzeichnet,
dass mindestens eine gemessene Spannung mit einem vorbestimmten Wert verglichen wird. - Verfahren nach einem der Ansprüche 9 bis 10,
dadurch gekennzeichnet, dass das Vergleichen der gemessenen Spannung mit einem vorbestimmten Wert das Vergleichen des gemessenen Wertes mit einer Reihe von annehmbaren Werten umfasst. - Elektrofotografischer Markierungsapparat (10) mit einer ersten Ladestation (28), einem fotoleitenden Element (18) und einer Vielzahl von Untersystemen (24, 28, 30, 34, 38, 40, 42, 43, 46, 47, 48, 49, 50, 51, 76), die die folgenden Elemente aufweist:(a) einen Spannungsmesser (50) an einer vorbestimmten Stelle, und(b) eine logische Steuereinheit (LCU) (24), die so eingestellt ist, dass sie eine Referenzspannung auf dem fotoleitenden Element (18) schafft, wobei die Referenzspannung einer Ladungseffizienz der ersten Ladestation (28) entspricht, und die LCU (24) des weiteren so eingestellt ist, dass sie wahlweise ein Untersystem (28, 30, 46, 47, 51) schaltet, um eine resultierenden Spannung auf dem fotoleitenden Element (18) zu schaffen und das fotoleitende Element (18) so zu transportieren, dass es dem Spannungsmesser (50) die resultierende Spannung anzeigt.
- Elektrofotografischer Markierungsapparat (10) nach Anspruch 12,
dadurch gekennzeichnet, dass die LCU (24) angewählt wird, um eine derzeitige Ladungseffizienz der ersten Ladestation (28) anzuzeigen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/572,526 US6580880B1 (en) | 2000-05-17 | 2000-05-17 | Electrophotographic process control and diagnostic system |
US572526 | 2000-05-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1156380A2 true EP1156380A2 (de) | 2001-11-21 |
EP1156380A3 EP1156380A3 (de) | 2004-10-20 |
EP1156380B1 EP1156380B1 (de) | 2009-09-09 |
Family
ID=24288212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01111173A Expired - Lifetime EP1156380B1 (de) | 2000-05-17 | 2001-05-11 | Elektrofotografische Prozesssteuerung und diagnostisches System |
Country Status (7)
Country | Link |
---|---|
US (1) | US6580880B1 (de) |
EP (1) | EP1156380B1 (de) |
JP (1) | JP2003533746A (de) |
AU (1) | AU2001263095A1 (de) |
CA (1) | CA2375064C (de) |
DE (2) | DE10122879A1 (de) |
WO (1) | WO2001088625A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6772382B2 (en) * | 2001-05-02 | 2004-08-03 | Teradyne, Inc. | Driver for integrated circuit chip tester |
US6931355B2 (en) * | 2002-02-26 | 2005-08-16 | Xerox Corporation | Method and apparatus for providing data logging in a modular device |
Citations (4)
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JPH01287577A (ja) * | 1988-05-13 | 1989-11-20 | Fuji Xerox Co Ltd | マーキングサブシステムチェック方式 |
US5012279A (en) * | 1988-06-30 | 1991-04-30 | Mita Industrial Co., Ltd. | Abnormality-detecting method for an electrostatic image-recording machine |
US5862433A (en) * | 1997-12-29 | 1999-01-19 | Eastman Kodak Company | Electrostatographic method and apparatus with improved auto cycle up |
US5897238A (en) * | 1998-06-18 | 1999-04-27 | Eastman Kodak Company | Method of setting position of a corona charger |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62187367A (ja) * | 1986-02-13 | 1987-08-15 | Canon Inc | 画像記録装置 |
JPH041790A (ja) * | 1990-04-19 | 1992-01-07 | Canon Inc | 画像形成装置 |
US5523831A (en) * | 1994-03-17 | 1996-06-04 | Eastman Kodak Company | Accurate dynamic control of the potential on the photoconductor surface using an updatable look-up table |
JPH08185016A (ja) * | 1994-12-28 | 1996-07-16 | Fujitsu Ltd | 表面電位制御方法 |
JPH10333385A (ja) | 1997-05-27 | 1998-12-18 | Canon Inc | カラー画像形成装置 |
US5937229A (en) | 1997-12-29 | 1999-08-10 | Eastman Kodak Company | Image forming apparatus and method with control of electrostatic transfer using constant current |
-
2000
- 2000-05-17 US US09/572,526 patent/US6580880B1/en not_active Expired - Fee Related
-
2001
- 2001-05-11 CA CA002375064A patent/CA2375064C/en not_active Expired - Fee Related
- 2001-05-11 AU AU2001263095A patent/AU2001263095A1/en not_active Abandoned
- 2001-05-11 DE DE10122879A patent/DE10122879A1/de not_active Withdrawn
- 2001-05-11 WO PCT/US2001/015448 patent/WO2001088625A1/en unknown
- 2001-05-11 DE DE50115095T patent/DE50115095D1/de not_active Expired - Lifetime
- 2001-05-11 JP JP2001584957A patent/JP2003533746A/ja active Pending
- 2001-05-11 EP EP01111173A patent/EP1156380B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01287577A (ja) * | 1988-05-13 | 1989-11-20 | Fuji Xerox Co Ltd | マーキングサブシステムチェック方式 |
US5012279A (en) * | 1988-06-30 | 1991-04-30 | Mita Industrial Co., Ltd. | Abnormality-detecting method for an electrostatic image-recording machine |
US5862433A (en) * | 1997-12-29 | 1999-01-19 | Eastman Kodak Company | Electrostatographic method and apparatus with improved auto cycle up |
US5897238A (en) * | 1998-06-18 | 1999-04-27 | Eastman Kodak Company | Method of setting position of a corona charger |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN Bd. 014, Nr. 064 (P-1002), 6. Februar 1990 (1990-02-06) -& JP 01 287577 A (FUJI XEROX CO LTD), 20. November 1989 (1989-11-20) * |
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CA2375064A1 (en) | 2001-11-22 |
DE50115095D1 (de) | 2009-10-22 |
DE10122879A1 (de) | 2001-11-22 |
EP1156380A3 (de) | 2004-10-20 |
WO2001088625A1 (en) | 2001-11-22 |
AU2001263095A1 (en) | 2001-11-26 |
EP1156380B1 (de) | 2009-09-09 |
CA2375064C (en) | 2004-12-28 |
US6580880B1 (en) | 2003-06-17 |
JP2003533746A (ja) | 2003-11-11 |
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