Image forming apparatus and image formation method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12055873
APP PUB NO 20240069469A1
SERIAL NO

18455662

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Abstract

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An image forming apparatus includes a developer, a development device, and an image bearing member. The developer includes an initial developer containing an initial carrier and a replenishment developer containing a replenishment carrier. The initial carrier has a surface roughness Sa1 of at least 0.3 μm and no greater than 1.0 μm. A ratio Sa1/Sa2 of the surface roughness Sa1 of the initial carrier to a surface roughness Sa2 of the replenishment carrier is at least 1.2 and no greater than 3.4. The packing volume Vp calculated from equation (1)“Vp=100×Y/(Z×DS)” was at least 40% and no greater than 70%. In equation (1), Y represents an amount of the developer conveyed by a developer bearing member. Z represents an apparent density of the initial developer. DS represents a width of a space between the developer bearing member and the image bearing member.

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Patent Owner(s)

Patent OwnerAddress
KYOCERA DOCUMENT SOLUTIONS INCNO 2-28 1-CHOME TAMATSUKURI CHUO-KU OSAKA 540-8585

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujishima, Masashi Osaka, JP 39 153
Sasaki, Asami Osaka, JP 16 45
Shimizu, Tamotsu Osaka, JP 117 423
Takeuchi, Eriko Osaka, JP 4 17

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