Claims
- 1. A developing apparatus for developing an electrostatic latent image formed on an electrostatic latent image holding member to form a visible image with a single component toner, said apparatus comprising:
- first toner carrier means, comprising a first toner carrier having a first peripheral surface for holding a layer of said single component toner and a first regulating member, for substantially evenly dispersing a thickness of said toner layer, said first regulating member contacting said first peripheral surface, and said first toner carrier being rotatably disposed in such a manner that said first peripheral surface holding said layer of said single component toner relatively approaches to or comes in contact with a peripheral surface of said electrostatic latent image holding member to develop said electrostatic latent image with said single component toner held on said first peripheral surface; and
- second toner carrier means, comprising a second toner carrier having a second peripheral surface for holding a layer of said single component toner and a second regulating member, for substantially evenly dispersing a thickness of said toner layer on said second peripheral surface, said second toner carrier being rotatably disposed to relatively approach or come in contact with said first toner carrier so as to transfer said charged single component toner layer formed on said second peripheral surface to said first peripheral surface, and said second regulating member being disposed to come in contact with said second toner carrier so as to control the charging of said single component toner held on said second peripheral surface of said second toner carrier.
- 2. The developing apparatus of claim 1, wherein said first toner carrier is rotated in the reverse direction to said second toner carrier.
- 3. The developing apparatus of claim 1, further comprising a toner supply member for supplying said single component toner to said second peripheral surface.
- 4. The developing apparatus of claim 3, wherein said toner supply member is a roller that rotatably contacts said second peripheral surface, said second peripheral surface being moved in the reverse direction to that of said toner supply member.
- 5. The developing apparatus of claim 1, wherein the peripheral speed of said second toner carrier is 1.1 to 4 times faster than the peripheral speed of said first toner carrier.
- 6. The developing apparatus of claim 1, wherein said first peripheral surface is smoother than said second peripheral surface.
- 7. The developing apparatus of claim 6, wherein a surface roughness of said first toner carrier is 3.mu.m Rz or less.
- 8. The developing apparatus of claim 1, wherein said first toner carrier is a electroconductive rubber roller.
- 9. The developing apparatus of claim 1, wherein said second toner carrier is a metal roller.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-240662 |
Sep 1992 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 08/117,595, filed Sept. 8, 1993, now U.S. Pat. No. 5,412,456.
US Referenced Citations (11)
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Divisions (1)
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Number |
Date |
Country |
Parent |
117595 |
Sep 1993 |
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