Mita Industrial Co., Ltd.

Kyocera Mita Corporation

Yoshihisa Kuramae

Akihiro Watanabe

Noriaki Tsubota

Masahiko Kubo

Kazuo Fuji

Naruo Yabe

Takashi Nagai

Toru Takatsuna

Mitsushi Kuroki

Kazushige Inoue

Akira Nakakuma

Kazuhisa Edahiro

Yuichiro Iwase

Tsutomu Uezono

Hiroshi Mori

Ken Imai

Katsumi Oyama

Yuki Shibahara

Toshio Nishio

Hirofumi Matsuda

Junji Matsui

When a facsimile data is received, a control unit causes the content of the facsimile data to be displayed on a display. The control unit causes a recording unit to print the content of the facsimile data on a recording sheet when a 'Print' key is pressed down with the facsimile data displayed on the display while causing a forwarding method selection screen to be displayed on the display when a 'To Forward' key is pressed down. The control unit causes a display urging the selection of the E-mail transmission of the received facsimile data, the transmission thereof to another computer and the transmission thereof to another facsimile apparatus to be displayed in the forwarding method selection screen on the display, and the facsimile data is forwarded by a forwarding method corresponding to the instruction given from an operator.

Facsimile apparatus

There is disclosed a positive charging type electrophotographic toner comprising a fixing resin, and a colorant and an electric charge controlling material, which are contained in the fixing resin, the electric charge controlling material being an electric charge controlling resin comprising a polymer which is compatible with the fixing resin, a molecular-weight distribution of the polymer resembling a molecular-weight distribution of a weight-average molecular weight of not more than 20,000 in the molecular-weight distribution of the fixing resin, and a group corresponding to a quaternary ammonium salt being contained at the side chain of the polymer. This toner is superior in charging properties, fixing properties, offset resistance and strength, because a resin having a quaternary ammonium salt group is used as the electric charge controlling material.

Electrophotographic toner

The present invention provides a toner 1 for non-magnetic one-components developments to be used for a method for non-magnetic one-component contact type development, wherein an apparent density is not less than 0.32 g/cc and when supplying to a developing roller 2 immediately after the consumption at the black solid part, a charged amount is not less than 7 .mu.C/g at an absolute value. This toner is suitable for using in combination with an organic photoconductor and can prevent that a residual image of the black solid part is remained at the half tone part immediately after the development of the black solid part.

Toner for non-magnetic one-component development and method for contact

The present invention provides a magnetic brush developing method using a two-component developer, characterized in that the development is carried out under such conditions that at the position where the sliding contact of the magnetic brush with the surface of the photosensitive material drum terminates, the following requirement is satisfied:

Magnetic brush development process

The electrophotographic toner for negative charging according to the present invention is characterized in that a metal compound of an aromatic hydroxycarboxylic acid is used as a charge-controlling agent for negative charging and a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with the charge-controlling agent. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.

Electrophotographic toner for negative charging

A two-component developer for use in dry development of electrostatic charge pattern, comprising a mixture of magnetic carrier particles and electroscopic toner particles, characterized in that said magnetic carrier particles have a relaxation time B (msec) satisfying the equation 0&lt;B&lt;20 when they are situated in a dynamic state and said developer has a relaxation time A (msec) satisfying the equation: 0.35B+11&lt;A&lt;0.35B+14 when it is situated in a dynamic state.

Two-component developer for use in dry development of electrostatic

The electrophotographic toner for negative charging according to the present invention is characterized in that a polyester resin is used as a fixing resin and a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with a charge-controlling agent for negative charging. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.

Disclosed are a two-component type developer for use in the electrophotography or electrostatic printing, which comprises a magnetic carrier and a toner, and a process for the preparation thereof. This developer has a dynamic resistivity (Rd) lower than the dynamic resistivity (Rc) of the magnetic carrier. This developer is prepared by mixing a toner with a magnetic carrier so that the dynamic resistivity (Rd) of the formed developer is lower than the dynamic resistivity (Rc) of the magnetic carrier. This developer is capable of realizing an excellent reproducibility of a fine line image and a high density of a solid image area simultaneously.

Developer and process for preparation thereof

The electrophotographic toner for negative charging according to the present invention is characterized in that an acrylamide copolymer-containing sulfonic acid group is used as a charge-controlling agent for negative charging and a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with the charge-controlling agent. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.

The electrophotographic toner for negative charging according to the present invention is characterized in that a quaternary ammonium salt having an oxyacid anion is used as a charge-controlling assistant in combination with a charge-controlling agent for negative charging. This quaternary ammonium salt used as the assistant is incompatible with a fixing resin but dispersible therein. Therefore, the toner of the present invention provides a sharp distribution of the charge quantity, and formation of a highly charged toner having no contribution to development or a lowly charged toner causing scattering of the toner can be effectively prevented.

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Hirakata, Japan

Yoshihisa Kuramae