Patent ID: 6308038
Filing Date: 2001-10-23
Classification: G03G

Abstract:
A developing apparatus comprising:a developer carrying body for carrying a developer thereon; anda layer thickness regulating member for regulating a layer thickness of the developer carried on said developer carrying body, the developer carried on said developer carrying body contacting with an image bearing body after the layer thickness thereof is regulated by said layer thickness regulating member;wherein when a charge amount per 1 g of the developer after the layer thickness is regulated by said layer thickness regulating member and before the developer contacts with the image bearing body is defined as Q (.mu.C/g) and an electrical resistance per axial length 1 mm of said developer carrying body is defined as R (.OMEGA./mm),R.gtoreq.0.9.times.(-7.83.times.10.sup.4.vertline.Q.vertline.+7. 05.times.10.sup.6)andR.ltoreq.1.1.times.(-7.83.times.10.sup.4.vertline.Q.vertline.+7. 05.times.10.sup.6)are satisfied.