Claims
- 1. An image forming apparatus comprising:
- an image carrier; and
- a revolver developing device rotatable around a shaft to bring any one of a plurality of developing units to face said image carrier for effecting development at a developing position;
- each of said developing units comprising:
- a casing rotatably accommodating said developing device therein;
- a toner storing section provided on one side of said casing;
- a first conveyor member for conveying toner from the toner storing section to a developing area
- a second conveyor member for conveying used toner from the developing area to the toner storing section; and
- a toner cartridge mounted on said toner storing section for feeding new toner to the toner storing section.
- 2. The image forming apparatus as claimed in claim 1, further comprising:
- a protective member having an opening which faces said image carrier at the developing position when said protective member is mounted on said image forming apparatus.
- 3. The image forming apparatus as claimed in claim 1, wherein a number of said plural developing units is four.
- 4. The image forming apparatus as claimed in claim 1, wherein said image carrier is a belt-like photosensitive member.
- 5. The image forming apparatus as claimed in claim 1, wherein said toner cartridge can be detachable from said toner storing section.
- 6. An image forming apparatus, comprising:
- an image carrier; and
- a revolver developing device rotatable around a shaft to bring any one of a plurality of developing units to face said image carrier for effecting development at a developing position;
- each of said developing units comprising:
- a casing rotatably accommodating said developing device therein;
- a toner storing section provided on one side of said casing;
- a first conveyor member for conveying toner from the toner storing section to a developing area;
- a second conveyor member for conveying used toner from the developing area to the toner storing section;
- a toner cartridge mounted on said toner storing section for feeding new toner to the toner storing section; and
- wherein said first conveyor member conveys toner from said toner storing section to a toner supply roller, which comes into contact with a developing roller, and wherein said first conveying member is disposed in said casing.
- 7. The image forming apparatus as claimed in claim 6, wherein said toner supply roller and said developing roller are paralleled with said first conveyor member.
- 8. The image forming apparatus as claimed in claim 6, wherein said first conveyor member conveys toner toward an upstream side of a position where said supply roller comes into contact with the developing roller, with respect to a direction in which the supply roller rotates.
- 9. The image forming apparatus as claimed in claim 8, wherein said first conveyor member is disposed in a toner transport space of said casing; and
- the second conveyor member is disposed in a bottom of said casing.
- 10. An image forming apparatus comprising:
- an image carrier; and
- a revolver developing device rotatable around a shaft to bring any one of a plurality of developing units to face said image carrier for effecting development at a developing position;
- each of said developing units comprising:
- a casing rotatably accommodating said developing device therein;
- a toner storing section provided on one side of said casing;
- a first conveyor member for conveying toner from said toner storing section-to a toner transport space in which a toner supply roller, which comes into contact with a developing roller, is disposed in said casing;
- a second conveyor member for conveying used toner from a communication passage to said toner storing section, wherein said second conveyor member is disposed in said casing; and
- a toner cartridge mounted on said toner storing section for feeding new toner to the toner storing section.
- 11. An image forming apparatus as claimed in claim 10, further comprising:
- a protective member having an opening which faces said image carrier at the developing position when said protective member is mounted on said image forming apparatus.
- 12. The image forming apparatus an claimed in claim 10, wherein said image carrier is a belt-like photosensitive member.
- 13. The image forming apparatus as claimed in claim 10, wherein said toner cartridge can be detachable from said toner storing section.
- 14. An image forming apparatus, comprising:
- an image carrier; and
- a revolver developing device rotatable around a shaft to bring any one of a plurality of developing units to face said image carrier for effecting development at a developing position;
- each of said developing units comprising:
- a casing rotatably accommodating said developing device therein;
- a toner storing section provided on one side of said casing;
- a first conveyor member for conveying toner from said toner storing section to a toner transport space in which a toner supply roller, which comes into contact with a developing roller, is disposed in said casing;
- a second conveyor member for conveying used toner from a communication passage to said toner storing section, wherein said second conveyor member is disposed in said casing; and
- a toner cartridge mounted on said toner storing section for feeding new toner to the toner storing section;
- wherein said first conveyor member conveying toner is rotated in a predetermined direction in which toner is conveyed from said toner storing section to said toner transport space; and
- wherein said second conveyor member for returning toner from said toner transport space to said toner storing section is disposed in a bottom of said casing and below said first conveyor member.
- 15. An image forming apparatus, comprising:
- an image carrier; and
- a revolver developing device rotatable around a shaft to bring any one of a plurality of developing units to face said image carrier for effecting development at a developing position;
- each of said developing units comprising:
- a casing rotatably accommodating said developing device therein;
- a toner storing section provided on one side of said casing;
- a first conveyor member for conveying toner from said toner storing section to a toner transport space in which a toner supply roller, which comes into contact with a developing roller, is disposed in said casing;
- a second conveyor member for conveying used toner from a communication passage to said toner storing section, wherein said second conveyor member is disposed in said casing; and
- a toner cartridge mounted on said toner storing section for feeding new toner to the toner storing section;
- wherein said first conveyor member conveying toner is rotated in a predetermined direction in which toner is conveyed from said toner storing section to said toner transport space; and
- wherein said second conveyor member for conveying toner, in which said second conveyor member is rotated in an opposite direction to the first conveyor member, is disposed in a bottom of the casing; and
- wherein said toner supply roller and the developing roller are paralleled with the first and second conveyor members.
- 16. An image forming apparatus comprising:
- an image carrier; and
- a revolver developing device rotatable around a shaft to bring any one of a plurality of developing units to face said image carrier for effecting development at a developing position;
- each of said developing units comprising:
- a casing rotatably accommodating said developing device therein and including a toner transport space;
- a toner storing section provided on one side of said casing;
- a first conveyor member for conveying toner from said toner storing section to the toner transport space, in which a toner supply roller, which comes into contact with said developing roller, is disposed in said casing;
- a second conveyor member for conveying toner which is disposed above said supply roller in said toner transport space of the casing and returns non-contributed toner for development from said transport space to said toner storing section; and
- a toner cartridge mounted on said toner storing section for feeding new toner to the toner storing section.
- 17. The image forming apparatus as claimed in claim 16, further comprising:
- a protective member having an opening which faces said image carrier at the developing position when said protective member is mounted on said apparatus.
- 18. The image forming apparatus as claimed in claim 16, wherein said first conveyor member for conveying toner is rotated in a predetermined direction in which toner is conveyed from said toner storing section to said toner transport space; and
- said second conveyor member for conveying toner is rotated in an opposite direction to the first conveyor member.
- 19. The image forming apparatus as claimed in claim 16, wherein a number of said plural developing units is four.
- 20. The image forming apparatus as claimed in claim 16, wherein said first conveyor member for conveying toner is rotated in a predetermined direction in which toner is conveyed from said toner storing section to said toner transport space; and
- said second conveyor member for conveying toner is rotated in an opposite direction to the first conveyor member; and
- said toner supply roller and the developing roller are paralleled with the first and second conveyor members.
- 21. The image forming apparatus as claimed in claim 16, wherein said image carrier is a belt-like photosensitive member.
- 22. The image forming apparatus as claimed in claim 16, wherein said first conveyor member conveys toner toward an upstream side of a position where said supply roller contacts said developing roller, with respect to a direction in which the supply roller rotates.
- 23. The image forming apparatus as claimed in claim 16, wherein said toner cartridge can be detachable from said toner storing section.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-082044 |
Apr 1993 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/224,291, filed on Apr. 7, 1994, now abandoned.
US Referenced Citations (19)
Continuations (1)
|
Number |
Date |
Country |
Parent |
224291 |
Apr 1994 |
|