A toner comprising a resin binder and a colorant comprising a composite oxide of two or more metals, wherein the composite oxide has a BET specific surface area of 0.5 to 7 m 2 /g and a saturation magnetization of from 1 to 40 Am 2 /kg; and a two-component developer comprising the above toner and a carrier having a saturation magnetization of from 40 to 100 Am 2 /kg. The toner can be used for the development of a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.

Claims

9 · 1 independent · depth 2

9 granted claims

›1.independentA toner comprising:na resin bindera colorant comprising a composite oxide of two or more metals, wherein the composite oxide has a BET specific surfac…+8

›2.↳ 1The toner according to claim 1, wherein the metal constituting the composite oxide is Fe (iron) and at least one member selected from the group consis…d2

›3.↳ 1The toner according to claim 1, wherein the composite oxide is contained in the toner in an amount of from 1 to 40% by weight.d2

›4.↳ 1The toner according to claim 1, wherein the resin binder comprises a polyester as a main component.d2

›5.↳ 1The toner according to claim 1, further comprising at least one releasing agent selected form the group consisting of carnauba wax, montan wax, candel…d2

›6.↳ 1The toner according to claim 1, wherein the toner has a volume-average particle size of from 3 to 15 μm.d2

›7.↳ 1The toner according to claim 1, wherein the toner is loaded on a printing device with a linear speed of 370 mm/sec or more.d2

›8.↳ 1A two-component developer comprising the toner as defined in claim 1 and a carrier having a saturation magnetization of from 40 to 100 Am2/kg.d2

›9.↳ 1A method for fixing a toner comprising the step of fixing the toner as defined in claim 1 on a paper having a basis weight of 60 to 150 g/m2.d2

Classifications

4 codes

IPC · International Patent Classification

Section G — Physics

G03G9/09

USPC · US Patent Classification

430/108.6430/109.4430/111.4

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File wrapper

Pendency

2.7 y

987 days filing → grant

Office actions

non-final + final

Responses

2 RCE

Examiner

John L. Goodrow

art unit 1756 · TC 1700

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Citations: 10 back · 0 forward

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Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20040072090 A1	15 Apr 2004

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