Electrophotography – Image formation – Development
Patent
1995-09-11
1997-12-09
Grimley, Arthur T.
Electrophotography
Image formation
Development
399279, G03G 1508
Patent
active
056970269
ABSTRACT:
An image forming apparatus including a developing device having various components with specific relationships between their lengths. There is an image bearing member such as a photoconductive drum or belt having a photosensitive layer. The photosensitive layer has a length A. A first toner transporting roller has two ends, the length between the two ends being defined as B. Additionally, there is a second toner transporting roller, disposed between and contacting both the image bearing member and the first toner transporting roller. The length of the second toner transporting roller being defined as C. The components of the image forming apparatus are constructed such the length of the second toner transporting roller is less than or equal to the lengths of both the first toner transporting roller and the photosensitive layer of the image bearing member. This means that the relationships A>C and B>C may exist. As an alternative, B is approximately equal to C with A being greater than both B and C. As a further alternative, A, B and C are each approximately equal to each other.
REFERENCES:
patent: 3667428 (1972-06-01), Smith
patent: 5264900 (1993-11-01), Momiyama et al.
patent: 5450176 (1995-09-01), Unemo et al.
patent: 5508794 (1996-04-01), Ikesue et al.
Endoh Shuichi
Hosokawa Hiroshi
Komatsubara Satoru
Matsumae Iwao
Murakami Eisaku
Chen Sophia S.
Grimley Arthur T.
Ricoh & Company, Ltd.
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