GB1240293A - Electrophotographic apparatus and method - Google Patents
Electrophotographic apparatus and methodInfo
- Publication number
- GB1240293A GB1240293A GB33313/68A GB3331368A GB1240293A GB 1240293 A GB1240293 A GB 1240293A GB 33313/68 A GB33313/68 A GB 33313/68A GB 3331368 A GB3331368 A GB 3331368A GB 1240293 A GB1240293 A GB 1240293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- image
- toner
- polarity
- charged
- brushed
- 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 3
- 230000001680 brushing effect Effects 0.000 abstract 2
- 230000005684 electric field Effects 0.000 abstract 2
- 238000004140 cleaning Methods 0.000 abstract 1
- 230000001235 sensitizing 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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
- G03G21/0047—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using electrostatic or magnetic means; Details thereof, e.g. magnetic pole arrangement of magnetic devices
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2221/00—Processes not provided for by group G03G2215/00, e.g. cleaning or residual charge elimination
- G03G2221/0005—Cleaning of residual toner
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
- Photoreceptors In Electrophotography (AREA)
- Color Electrophotography (AREA)
Abstract
1,240,293. Cleaning and developing xerographic surfaces. EASTMAN KODAK CO. July 12, 1968 [July 17, 1967], No.33313/68. Heading G2H. A xerographic process includes forming a latent electrostatic image on a surface by applying a sensitizing charge of a first polarity, imagewise exposing the surface, applying toner charged with a second polarity by brushing the surface after exposure in an electric field which urges residual toner having a charge of the first polarity away from background areas and image area and then brushing the surface in the presence of a second electrical field which urges toner, charged with the second polarity, toward the image areas and away from the background areas. In one embodiment, a surface 7, Fig. 1B, carrying a negatively charged image 2 is brushed with a brush 6 connected to a voltage source 8 which produces a field which urges positively charged toner towards the image and background areas while negatively charged toner is urged away from the surface 7. The surface 7 is then brushed with a brush 5 connected to a potential source 10 of,the same polarity but less magnitude than the charge image. In another embodiment, Fig. 2C (not shown) the charged surface (24) of a photo-conductive layer is brushed by a grounded magnetic brush (25) and then by a second magnetic brush (26) connected to a potential source (27) which urges toner from background areas. The process may be applied to a xerographic printer, Fig. 3, including a transparent drum 30 coated with a photo-conductive layer 32 exposed internally by a projector 34 to form a latent image brushed with first and second brushes 35, 36. A brush 40 cleans the inside of the drum after exposure by a lamp 41.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65393467A | 1967-07-17 | 1967-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1240293A true GB1240293A (en) | 1971-07-21 |
Family
ID=24622856
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33313/68A Expired GB1240293A (en) | 1967-07-17 | 1968-07-12 | Electrophotographic apparatus and method |
Country Status (4)
Country | Link |
---|---|
US (1) | US3589895A (en) |
CA (1) | CA929582A (en) |
DE (1) | DE1772876A1 (en) |
GB (1) | GB1240293A (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1192943B (en) * | 1962-11-21 | 1965-05-13 | Bolling Hall Sasnett Jun | Self-supporting fuel pump housing suitable for accommodating any pump system |
US3784302A (en) * | 1968-10-03 | 1974-01-08 | Xerox Corp | Electrophoretic imaging apparatus including application of dynamic stress on the particle suspension |
US3767446A (en) * | 1969-07-03 | 1973-10-23 | Xerox Corp | Development method with oscillating brush pad |
US3841892A (en) * | 1970-11-23 | 1974-10-15 | Ibm | Method for transferring developed image |
US3691993A (en) * | 1970-11-23 | 1972-09-19 | Ibm | Apparatus for transferring developed image |
US3754962A (en) * | 1970-12-21 | 1973-08-28 | Ibm | Development of electrostatic images |
US3850662A (en) * | 1971-09-10 | 1974-11-26 | Kalle Ag | Electrophotographic developing process and apparatus |
US3920453A (en) * | 1972-01-28 | 1975-11-18 | Addressograph Multigraph | Method of electrostatic duplicating by image transfer |
US3836381A (en) * | 1972-10-02 | 1974-09-17 | Secretary Supply Australia | Method of developing a dielectric pattern on a semiconductor surface using a two-component developer |
US3901189A (en) * | 1974-01-28 | 1975-08-26 | Xerox Corp | Magnetic brush developing apparatus |
US4083326A (en) * | 1977-02-28 | 1978-04-11 | Eastman Kodak Company | Single component developer applicator apparatus |
JPS55118059A (en) * | 1979-03-05 | 1980-09-10 | Canon Inc | Developing method |
US4384545A (en) * | 1979-08-03 | 1983-05-24 | Xerox Corporation | Development system |
JPS5898747A (en) * | 1981-12-08 | 1983-06-11 | Canon Inc | Image forming method |
JP3158491B2 (en) * | 1991-05-29 | 2001-04-23 | ミノルタ株式会社 | Image forming device |
ATE314324T1 (en) * | 2001-06-12 | 2006-01-15 | Schott Ag | METHOD FOR PRODUCING BOROSILICATE GLASSES |
-
1967
- 1967-07-17 US US653934A patent/US3589895A/en not_active Expired - Lifetime
-
1968
- 1968-06-07 CA CA021969A patent/CA929582A/en not_active Expired
- 1968-07-12 GB GB33313/68A patent/GB1240293A/en not_active Expired
- 1968-07-16 DE DE19681772876 patent/DE1772876A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CA929582A (en) | 1973-07-03 |
DE1772876A1 (en) | 1970-11-12 |
US3589895A (en) | 1971-06-29 |
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