GB1467972A - Method and apparatus for charging by corona discharge - Google Patents
Method and apparatus for charging by corona dischargeInfo
- Publication number
- GB1467972A GB1467972A GB1092074A GB1092074A GB1467972A GB 1467972 A GB1467972 A GB 1467972A GB 1092074 A GB1092074 A GB 1092074A GB 1092074 A GB1092074 A GB 1092074A GB 1467972 A GB1467972 A GB 1467972A
- Authority
- GB
- United Kingdom
- Prior art keywords
- charging
- discharge device
- corona discharge
- regulator
- corona
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 4
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
1467972 Corona charging apparatus K I P KK 12 March 1974 [30 March 1973] 10920/74 Heading H1X In a method of charging at least a portion of the surface of a body using a corona discharge device with a plurality of electrodes extending over all the portion and spaced evenly at all times therefrom and in which there is relative movement at least laterally between said body and a corona discharge device, the displacement current flowing across the body is varied smoothly, increasing at the commencement of the charging until a maximum is reached and then decreasing gradually so that the deposited charge has an even distribution across the portion. The corona device may comprise a plurality of parallel wire electrodes and the body to be charged may be a photo-sensitive element utilized in electrophotography and comprising insulating, photo-conductive and grounded electrode layers bonded together (Fig. 1, not shown). The method of the invention is stated to prevent the formation of a striped charge pattern owing to the large charging current which normally flows at the commencement or on interruption of charging. The control circuit shown comprises a driving circuit 10 for moving the corona discharge device 4 at a constant speed in response to an input signal. During movement the device 4 operates a first switch (not shown) included in a synchronizing circuit 11 for energizing a current regulator 12 connected to a time controller 13 including a plurality of variable resistors R1, R2, R3. R1 is used to control the build-up rate of the current to a predetermined value which is maintained constant under control of R2 until run down under control of R3. The output from the regulator 12 is applied to a voltage source 14 supplying the discharge device 4. At termination of the charging a signal is fed back from regulator 12 to circuit 11 to de-energize regulator 12, source 14 and device 4. The latter at the same time actuates a second switch (not shown) to de-energize the driving circuit 10. The displacement current waveform of Fig. 6 (not shown) may also be obtained by varying the distance between the corona discharge device and the surface of the body to be charged while maintaining constant the current flowing through the grounded support using apparatus described w.r.t., Fig. 9 (not shown). The method may also be applied to a rotary drum type copying machine.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3629373A JPS5541430B2 (en) | 1973-03-30 | 1973-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1467972A true GB1467972A (en) | 1977-03-23 |
Family
ID=12465746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1092074A Expired GB1467972A (en) | 1973-03-30 | 1974-03-12 | Method and apparatus for charging by corona discharge |
Country Status (6)
Country | Link |
---|---|
US (1) | US3912989A (en) |
JP (1) | JPS5541430B2 (en) |
CA (1) | CA1015023A (en) |
DE (1) | DE2414907C3 (en) |
FR (1) | FR2223732B1 (en) |
GB (1) | GB1467972A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5349988A (en) * | 1976-10-18 | 1978-05-06 | Canon Inc | Electricity reduction method and its device |
JPS5480360U (en) * | 1977-11-17 | 1979-06-07 | ||
DE2849233C2 (en) * | 1978-11-13 | 1982-12-09 | Olympia Werke Ag, 2940 Wilhelmshaven | Electrophotographic copier with a transfer device for transferring a toner image onto an image receiving material |
US4228480A (en) * | 1979-02-12 | 1980-10-14 | Eastman Kodak Company | Electrophotographic apparatus with improved corona charging |
JPS55113057A (en) * | 1979-02-25 | 1980-09-01 | Konishiroku Photo Ind Co Ltd | Exchange adjustment system for photoreceptor of electrophotographic copying machine |
JPS55120061A (en) * | 1979-03-08 | 1980-09-16 | Canon Inc | Transfer device |
US4245272A (en) * | 1979-04-30 | 1981-01-13 | Eastman Kodak Company | Apparatus and method for low sensitivity corona charging of a moving photoconductor |
US4386834A (en) * | 1981-07-06 | 1983-06-07 | Kirlian Equipment Corporation | Kirlian photography device |
US4481557A (en) * | 1982-09-27 | 1984-11-06 | Ransburg Corporation | Electrostatic coating system |
US4496827A (en) * | 1983-04-25 | 1985-01-29 | Proctor-Silex, Inc. | Enhanced heat and mass transfer apparatus |
US4558221A (en) * | 1983-05-02 | 1985-12-10 | Xerox Corporation | Self limiting mini-corotron |
US4890190A (en) * | 1988-12-09 | 1989-12-26 | Graco Inc. | Method of selecting optimum series limiting resistance for high voltage control circuit |
US5081476A (en) * | 1990-04-04 | 1992-01-14 | Xerox Corporation | Ionographic printhead gating control for controlling charge density image defects due to surface velocity variations |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3684364A (en) * | 1971-06-24 | 1972-08-15 | Xerox Corp | Lift off electrode |
-
1973
- 1973-03-30 JP JP3629373A patent/JPS5541430B2/ja not_active Expired
-
1974
- 1974-03-12 GB GB1092074A patent/GB1467972A/en not_active Expired
- 1974-03-14 US US451008A patent/US3912989A/en not_active Expired - Lifetime
- 1974-03-28 FR FR7410794A patent/FR2223732B1/fr not_active Expired
- 1974-03-28 DE DE2414907A patent/DE2414907C3/en not_active Expired
- 1974-03-29 CA CA196,398A patent/CA1015023A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2414907B2 (en) | 1979-10-31 |
CA1015023A (en) | 1977-08-02 |
FR2223732A1 (en) | 1974-10-25 |
JPS49123336A (en) | 1974-11-26 |
DE2414907C3 (en) | 1980-07-24 |
FR2223732B1 (en) | 1978-06-02 |
JPS5541430B2 (en) | 1980-10-24 |
DE2414907A1 (en) | 1974-10-10 |
US3912989A (en) | 1975-10-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19940311 |