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US 10,234,783 B2Granted
Carrier, developer, image forming apparatus, developer stored unit, and image forming method
AssigneeRicoh Company, Ltd.
InventorsKoichi Sakata, Tohru Suganuma, Shohichi Sugimoto, Hiroshi Tohmatsu, Hiroyuki Kishida, Kenichi Mashiko, Toyoaki Tano
Life of this patent
Estimating the term…
Abstract
A carrier including a resin layer including at least one kind of particles, wherein the at least one kind of the particles are particles of barium sulfate, wherein an amount of Ba detected is 0.3 atomic % or greater in a Ba analysis through X-ray photoelectron spectroscopy (XPS) of the carrier, and wherein circle-equivalent diameters of the particles of the barium sulfate are 400 nm or greater but 900 nm or smaller.
Claims12
A carrier, comprising
- a resin layer including at least one kind of particles,
- wherein
- the at least one kind of particles are particles of barium sulfate,
- an amount of Ba detected is 0.3 atomic % or greater in a Ba analysis through X-ray photoelectron spectroscopy of the carrier, and
- circle-equivalent diameters of the particles of barium sulfate range greater than 400 nm to 900 nm.
2 more elements
Dependencies are inferred from the claim text.