Toner for developing electrostatic images and image forming method
First Claim
Patent Images
1. A toner for developing an electrostatic image, which comprises:
- (a) toner particles containing at least a binder resin and a colorant; and
(b) a fine powder having base particles on the surfaces of which coats of crystalline low electrical resistance tin oxide are formed;
wherein said crystalline low electrical resistance tin oxide contains less than 100 ppm of antimony, arsenic and phosphorus and has an oxygen deficiency structure.
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Accused Products
Abstract
A toner for developing electrostatic images contains toner particles containing at least a binder resin and a colorant as well as a fine powder comprised of base particles on which crystalline low resistance tin oxide films are formed. The crystalline low resistance tin oxide contains less than 100 ppm of antimony, arsenic and phosphorus, and has an oxygen deficiency structure. The toner is excellent in strength and can consistently give high quality images under any environmental conditions.
14 Citations
24 Claims
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1. A toner for developing an electrostatic image, which comprises:
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(a) toner particles containing at least a binder resin and a colorant; and (b) a fine powder having base particles on the surfaces of which coats of crystalline low electrical resistance tin oxide are formed; wherein said crystalline low electrical resistance tin oxide contains less than 100 ppm of antimony, arsenic and phosphorus and has an oxygen deficiency structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image forming method comprising;
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forming an electrostatic image on an electrostatic image bearing member; forming a thin layer of a toner on a developer carrying member by means of a coating member pressing the developer carrying member via the toner; and developing the electrostatic image by transferring the toner on the developer carrying member to the electrostatic image bearing member to form a toner image; wherein said toner comprises; (a) toner particles containing at least a binder resin and a colorant; and (b) a fine powder having base particles on the surfaces of which coats of crystalline low electrical resistance tin oxide are formed; said crystalline low electrical resistance tin oxide containing less than 100 ppm of antimony, arsenic and phosphorus, and having an oxygen deficiency structure. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification