JPS5636658A - Device for preventing image omission in transfer type electrophotographic apparatus - Google Patents
Device for preventing image omission in transfer type electrophotographic apparatusInfo
- Publication number
- JPS5636658A JPS5636658A JP11251879A JP11251879A JPS5636658A JP S5636658 A JPS5636658 A JP S5636658A JP 11251879 A JP11251879 A JP 11251879A JP 11251879 A JP11251879 A JP 11251879A JP S5636658 A JPS5636658 A JP S5636658A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- paper
- humidity
- charging voltage
- electrophotographic apparatus
- 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.)
- Pending
Links
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To prevent image omission phenomenon in which a transfer paper waves in high humidity and floats up, hindering toner attachment, by controlling transfer charging voltage in inverse proportion to humidity.
CONSTITUTION: When a transfer paper absorbs moisture, it becomes soft, waves, and wrinkles, so part A floating up from a photosensitive drum occurs, resulting in causing image omission on image areas due to nontransferring of toner. At that time, the transfer paper is sufficiently extended laterally with guide 1a by lowering charging voltage of transfer charger 1 in order to weaken the close attaching force between the durm and the paper, and the floating part of paper A disappeares. Humidity rises in summer, and temperatures rises too, so the efficiency in charging and developing in an electrophotographic apparatus is enhanced, resulting in elevating image density too high. Therefore, the density is kept constant in high humidity by lowering the transfer charging voltage.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11251879A JPS5636658A (en) | 1979-09-03 | 1979-09-03 | Device for preventing image omission in transfer type electrophotographic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11251879A JPS5636658A (en) | 1979-09-03 | 1979-09-03 | Device for preventing image omission in transfer type electrophotographic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5636658A true JPS5636658A (en) | 1981-04-09 |
Family
ID=14588644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11251879A Pending JPS5636658A (en) | 1979-09-03 | 1979-09-03 | Device for preventing image omission in transfer type electrophotographic apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5636658A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5291253A (en) * | 1989-12-20 | 1994-03-01 | Hitachi, Ltd. | Corona deterioration and moisture compensation for transfer unit in an electrophotographic apparatus |
-
1979
- 1979-09-03 JP JP11251879A patent/JPS5636658A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5291253A (en) * | 1989-12-20 | 1994-03-01 | Hitachi, Ltd. | Corona deterioration and moisture compensation for transfer unit in an electrophotographic apparatus |
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