GB1465969A - Provision of at least one control signal in electrostatic reproduction apparatus - Google Patents
Provision of at least one control signal in electrostatic reproduction apparatusInfo
- Publication number
- GB1465969A GB1465969A GB4054874A GB4054874A GB1465969A GB 1465969 A GB1465969 A GB 1465969A GB 4054874 A GB4054874 A GB 4054874A GB 4054874 A GB4054874 A GB 4054874A GB 1465969 A GB1465969 A GB 1465969A
- Authority
- GB
- United Kingdom
- Prior art keywords
- roll
- belt
- sensor
- bias
- voltage
- 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
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
- G03G15/0266—Arrangements for controlling the amount of charge
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
1465969 Automatic control of electrostatic charging XEROX CORP 17 Sept 1974 [26 Sept 1973] 40548/74 Heading G3R In an electrostatic reproduction system, a control signal representing charge on a photoreceptor medium is obtained using a conductive member which physically and electrically engages the medium. As shown in Fig. 2, a photo-conductive belt 17 is driven by a roller 22 past a corona charging device 40 and subsequent exposure and developing stations, Fig. 1 (not shown). The image is transferred to paper 31 passed between drive roller 22 and a transfer roll 32 supplied with a bias voltage 64 which aids image transfer. The charge on the belt 17 is monitored by a sensor 60 responsive to the voltage of roll 32 when the bias supply is switched off and no paper 31 is present, as detected by a sensor 68. The voltage sensor 60 is connected to a circuit 66 which controls the power supply 45 to the corona device 40. The control may also be made manually, or in response to a detector roll contacting the belt 17 immediately after passing the corona device 40, Fig. 3 (not shown). Other system parameters, such as developer roll bias or illumination intensity, may also be controlled.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US400776A US3887845A (en) | 1973-09-26 | 1973-09-26 | Copier photoreceptor charge control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1465969A true GB1465969A (en) | 1977-03-02 |
Family
ID=23584956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4054874A Expired GB1465969A (en) | 1973-09-26 | 1974-09-17 | Provision of at least one control signal in electrostatic reproduction apparatus |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3887845A (en) |
| CA (1) | CA1030208A (en) |
| GB (1) | GB1465969A (en) |
| NL (1) | NL7411477A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518667A (en) * | 1978-07-27 | 1980-02-08 | Minolta Camera Co Ltd | Stabilization method of image density |
| US4454559A (en) * | 1982-08-30 | 1984-06-12 | Xerox Corporation | Control for a corona discharge device |
| US4678317A (en) * | 1985-11-04 | 1987-07-07 | Savin Corporation | Charge and bias control system for electrophotographic copier |
| US4862224A (en) * | 1988-04-04 | 1989-08-29 | Eastman Kodak Company | Cleaning device for electrostatic imaging apparatus |
| JP2786657B2 (en) * | 1989-03-23 | 1998-08-13 | 株式会社東芝 | Image forming device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3013203A (en) * | 1958-07-01 | 1961-12-12 | Xerox Corp | Xerographic electrometer apparatus |
| US3604925A (en) * | 1968-12-03 | 1971-09-14 | Zerox Corp | Apparatus for controlling the amount of charge applied to a surface |
| US3586908A (en) * | 1969-02-28 | 1971-06-22 | Robert E Vosteen | Automatic potential control system for electrophotography apparatus |
| GB1349055A (en) * | 1970-05-04 | 1974-03-27 | Agfa Gevaert | Method for the control of charge on a moving web |
-
1973
- 1973-09-26 US US400776A patent/US3887845A/en not_active Expired - Lifetime
-
1974
- 1974-05-03 CA CA198,830A patent/CA1030208A/en not_active Expired
- 1974-08-28 NL NL7411477A patent/NL7411477A/xx unknown
- 1974-09-17 GB GB4054874A patent/GB1465969A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1030208A (en) | 1978-04-25 |
| NL7411477A (en) | 1974-11-25 |
| US3887845A (en) | 1975-06-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920917 |