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Toner, developer, image forming apparatus, and image forming method

US9851649B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9851649-B2
Application numberUS-201314891032-A
CountryUS
Kind codeB2
Filing dateNov 27, 2013
Priority dateMay 14, 2013
Publication dateDec 26, 2017
Grant dateDec 26, 2017

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A toner includes a binder resin including a copolymer resin containing structural units derived from crystalline and non-crystalline resins, respectively. Spin-spin relaxation time (t50) of the toner at 50° C. measured by pulse NMR is ≦0.05 msec., spin-spin relaxation time (t130) at 130° C. when warmed from 50° C. to 130° C. is >15 msec., and spin-spin relaxation time (t′70) at 70° C. when cooled from 130° C. to 70° C. is ≦1.00 msec. A binarized image obtained by binarizing a phase image of the toner observed by a tapping mode AFM based on intermediate value between maximum and minimum phase difference values in the phase image includes first phase difference images constituted by large phase-difference portions and a second phase difference image constituted by a small phase-difference portion. The first phase difference images are dispersed in the second phase difference image. The dispersion diameter of the first phase difference images is 150 nm or less.

First claim

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The invention claimed is: 1. A toner, comprising: a binder resin, comprising a copolymer resin comprising a structural unit derived from a crystalline polyester resin and a structural unit derived from a non-crystalline polyester resin, such that a molar ratio of a crystalline segment to a non-crystalline segment in the copolymer resin is from 10/90 to 40/60, where the crystalline segment comprises the structural unit derived from the crystalline polyester resin and the non-crys…

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What does patent US9851649B2 cover?
A toner includes a binder resin including a copolymer resin containing structural units derived from crystalline and non-crystalline resins, respectively. Spin-spin relaxation time (t50) of the toner at 50° C. measured by pulse NMR is ≦0.05 msec., spin-spin relaxation time (t130) at 130° C. when warmed from 50° C. to 130° C. is >15 msec., and spin-spin relaxation time (t′70) at 70° C. when cool…
Who is the assignee on this patent?
Makabe Keiji, Sugimoto Tsuyoshi, Saito Akinori, and 8 more
What technology area does this patent fall under?
Primary CPC classification G03G9/08788. Mapped technology areas include Physics.
When was this patent published?
Publication date Tue Dec 26 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?
We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).