Developer conveying device, developing device, process unit,...

G - Physics – 03 – G

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G03G 15/08 (2006.01)

Patent

CA 2628230

A black developer is conveyed in a first conveyance chamber in a rotation axis direction while agitating with rotation of a first screw member. A black-toner- concentration detecting sensor detects a toner concentration of the black developer by having contact with the black developer conveyed inside the first conveyance chamber. An average of peak amounts of a pressing force on the black developer, which is conveyed inside the first conveyance chamber by the first screw member, with respect to the black toner-concentration detecting sensor is set within a range of 9.8 15 [N/m2] to 9.8 100 [N/m2].

Selon la présente invention, un développateur noir est transporté dans une première chambre de transport suivant un sens de rotation tout en étant agité avec la rotation d'un premier organe à visser. Un capteur détectant la concentration en toner noir détecte une concentration de toner du développateur noir en étant en contact avec le développateur noir transporté à l'intérieur de la première chambre de transport. On établit une moyenne des quantités maximales d'une force de pression sur le développateur noir, qui est transporté dans la première chambre de transport par le premier organe à visser, par rapport au capteur de détection de la concentration en toner noir dans une plage allant de 9,8 15 [N/m2] à 9,8 100 [N/m2].

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