公开(公告)号：US20210240102A1

公开(公告)日：2021-08-05

申请号：US17165370

申请日：2021-02-02

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazunori TANAKA ,  Kanako MORIMOTO ,  Tamotsu SHIMIZU ,  Kenichi TAMAKI

IPC: G03G15/08 ,  G03G15/16

Abstract: An image forming apparatus includes a toner charge amount predictor, a toner developing resistance calculator, and a determiner. The toner developing resistance calculator calculates a toner developing resistance on the basis of a bias voltage applied to a developing device and a measured developing current by dividing a value of the bias voltage by a value of the developing current when a developing device develops an electrostatic latent image formed on the surface of an image carrier to form a toner image. The toner charge amount predictor predicts a toner charge amount of a toner which is supplied to the image carrier by the developing device on the basis of a density of the toner image and the developing current. The determiner determines a state of the developing device on the basis of the toner charge amount and the toner developing resistance.

公开(公告)号：US20190204765A1

公开(公告)日：2019-07-04

申请号：US16191165

申请日：2018-11-14

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kanako MORIMOTO

IPC: G03G15/20

CPC classification number: G03G15/2025 ,  G03G15/2064

Abstract: A fixing apparatus includes: a fixing belt; a pressing member pushing the fixing belt from an outer face side of the fixing belt; a pushing member positioned inside the fixing belt and pushing the fixing belt from an inner face side of the fixing belt toward a side where the pressing member is located; a sheet-shaped heater positioned between the inner face of the fixing belt and the pushing member, provided with a substrate and a heating element placed on the substrate, and heating the fixing belt; and a lubricant holding part holding lubricant, and positioned between the sheet-shaped heater and the pushing member, or positioned in a part facing the sheet-shaped heater, of the pushing member, wherein a lubricant passage supplying the lubricant held by the lubricant holding part to the inner face of the fixing belt is formed in the substrate.