Ricoh Company, Ltd.

Mitsubishi Electric Corporation

Keisuke Tada

Shoki Matsuda

Hiroyuki Kato

Hideaki Yamamoto

Toshio Nakayama

Masaaki Kadoyanagi

Kenichi Oi

Nichika Moriguchi

Yorimasa Yasuda

Satoru Kozuka

Akihiro Gonda

Daisuke Misawa

Shinichiro Ando

Fumihiko Chimoto

Hiyori Fujino

Kenichi Uehara

Ayumi Satoh

Junichi Watanabe

Yoshinao Tatei

Hiroshi Endoh

Yasuyuki Sanui

Junya Koeda

Miyuki Hirata

Takashi Okano

Ayumi Oikawa

Yellow toner with excellent cleanability, transferability and device contamination resistance is provided. When intensity of spectrum at wavenumber λ, at which total intensity of Raman spectrums of toner particles from 950 cmthrough 3,250 cmin Raman spectroscopy of toner is maximum, is normalized to 1, and distribution is generated for ≥300 particles regarding LC calculated by [LC (%)=CHrate (%)−CHrate (%)] based on CHrate (%) defined as [(I−I)/I]×100 and CHrate (%) defined as [(I−I)/I]×100 where Iand Irepresent integrated intensities of spectrums of center and surface portions of each particle from 2,750 cmthrough 3,250 cm, and Irepresents average of Iand Iof all particles, percentage by number of particles having LC deviating from LC distribution median by absolute value of ≥25.0; is ≥1.0% by number and ≤25.0% by number.

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

A magenta toner is provided. The magenta toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 25.0% by number of the toner particles have a CH rate of 25.0% or more in absolute value. The CH rate is calculated from the following formula (1):rate(%)=[()/]×100  Formula (1)where, in a Raman spectrum of each toner particle, Irepresents an integrated intensity within a wavenumber region of from 2,750 to 3,250 cmwhen an intensity at a wavenumber λ within a wavenumber region of from 1,200 to 3,250 cmis s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber λ; and Irepresents an average of the I.

Magenta toner, developer, toner accommodating unit, image forming apparatus, and image forming method

Servo amplifier

A cyan toner is provided. The cyan toner comprises toner particles each comprising a binder resin and a colorant. From 1.0% to 20.0% by number of the toner particles have a CH rate of 7.0% or more in absolute value. The CH rate is calculated from the following formula (1):CH rate (%)=[()/]&#xd7;100&#x2003;&#x2003;Formula (1)where, in a Raman spectrum of each toner particle, Irepresents an integrated intensity within a wavenumber region of from 2,600 to 3,180 cmwhen an intensity at a wavenumber &#x3bb; within a wavenumber region of from 2,600 to 2,800 cmis s normalized to 1, where a total intensity of all the toner particles is maximum at the wavenumber &#x3bb;; and Irepresents an average of the I.

Cyan toner, developer, toner accommodating unit, image forming apparatus, and image forming method

A connector includes a first housing and a second housing. The connector includes a terminal that is a first terminal disposed in a region opposite to the electronic device, of the second housing, and a terminal that is a second terminal disposed in the region opposite to the electronic device, of the second housing, and disposed adjacent to the first terminal. The connector includes a terminal that is a third terminal disposed in the region opposite to the electronic device, of the second housing, and disposed adjacent to the second terminal along an arrangement direction of the first terminal and the second terminal. The connector includes a first connecting conductor that electrically connects together the first terminal and the second terminal, and electrically connects the first terminal and the second terminal to a first device-side conductor provided in the electronic device.

Connector and electronic device system

A yellow toner is provided. The yellow toner comprises toner particles each comprising a binder resin and a colorant, and 1.0% to 15.0% by number of the toner particles have a CH rate of 25.0% or more in absolute value. Here, the CH rate is calculated from the following formula (1):rate (%)=[()/]&#xd7;100&#x2003;&#x2003;Formula (1)where Irepresents an integrated intensity within a wavenumber region of from 2,750 to 3,250 cmwhen an intensity at a wavenumber &#x3bb; within a wavenumber region of from 950 to 3,250 cmis normalized to 1 in a Raman spectrum of each toner particle; and Irepresents an average of the I.

Yellow toner, developer, process cartridge, image forming apparatus, and image forming method

A method for manufacturing a toner, including at least: dissolving or dispersing a toner material including at least any one of a binder resin and a precursor of a binder resin in an organic solvent which is dispersed in a dispersant-including aqueous medium; forming particles by removing the organic solvent; washing the particles; forming voids in the particles by heating to a temperature T while or after dispersing the particles in an aqueous medium; forming toner base particles by adding a charge controlling agent; and adding an external additive to the toner base particles to obtain toner particles, wherein the T is between a glass transition temperature Tg of the toner particles and Tg+25&#xb0; C., and the toner has a cross-sectional void fraction Sp/St of 0.1% to 15.0%, where St is a cross-sectional area of the toner particles, and Sp is a cross-sectional area of the voids.

Method for manufacturing toner, toner and image forming method

A method of manufacturing toner including preparing a first liquid by dissolving or dispersing toner components including one or both of a binder resin and a precursor thereof in an organic solvent; preparing a second liquid by dispersing the first liquid in a first aqueous medium including a dispersant; producing primary particles by removing the organic solvent from the second liquid; washing the primary particles; preparing a third liquid by dispersing the washed primary particles in a second aqueous medium and heating the second aqueous medium while or after dispersing the washed primary particles therein; and producing toner particles by adding a charge controlling agent to the third liquid. This method satisfies the following inequation:0.60&#x2266;&#x2266;1.00wherein Sa represents a BET specific surface area of the primary particles included in the third liquid and Sb represents that of the toner particles stored for 2 weeks at 40&#xb0; C., 70% RH.

Method of manufacturing toner and toner

Growing community of inventors

Shizuoka, Japan

Keisuke Tada