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US 8,617,781 B2Granted
Carrier core particles for electrophotographic developer, method for manufacturing the same, carrier for electrophotographic developer and electrophotographic developer
AssigneesDowa Electronics Materials Co., Ltd., Dowa IP Creation Co., Ltd.
InventorTakeshi Kawauchi
Life of this patent
Estimating the term…
Abstract
The carrier core particles 11 for electrophotographic developer contain lithium as a core composition. When the carrier core particles 11 are immersed in pure water at a weight ratio of 1 part core particles 11 to 10 parts pure water and shaken, the amount of lithium that leaches out to the pure water is 0.10 ppm or lower.
Claims8
Carrier core particles for an electrophotographic developer, the carrier core particles containing lithium, wherein
- the amount of lithium contained in the carrier core particles is 10 ppm to 400 ppm.
A carrier for an electrophotographic comprising:
- carrier core particles containing lithium;
- and
- a resin coating on surfaces of the carrier core particles;
- wherein the amount of lithium contained in the carrier core particles is 10 ppm to 400 ppm.
1 more element
An electrophotographic developer used to develop electrophotographic images comprising:
- a carrier including carrier core particles containing lithium and resin covering surfaces of the carrier core particles;
- and
- a toner that can be triboelectrically charged by frictional contact with the carrier for development of the electrophotographic images;
- wherein the amount of lithium contained in the carrier core particles for electrophotographic developer is 10 ppm to 400 ppm.
1 more element
Dependencies are inferred from the claim text.