公开(公告)号：CA1122461A

公开(公告)日：1982-04-27

申请号：CA308803

申请日：1978-08-04

Applicant: MITA INDUSTRIAL CO LTD

Inventor： KOUCHI TOSHIHIRO ,  TAKAYAMA HIROSHI ,  AIZAWA TATSUO

IPC: G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G9/14

Abstract: In a one-component type developer for electrophotography consisting essentially of a dry blend of fixing magneto-sensitive particles and flowability- and electric resistance-controlling fine particles, when an aromatic vinyl resin and/or an acrylic resin is used an a binder resin for the magneto-sensitive particles in combination with a low molecular weight olefin resin, the magneto-sensitive particles are much improved in the property of holding the flowability- and electric resistance-controlling fine particles on the surfaces thereof. Accordingly, these fine particles cannot be substantially separated from the magneto-sensitive particles under agitation conditions, development conditions and fixing conditions. As a result, contamination of the interior of a copying machine, especially an optical system, can be completely prevented, and also contamination of the background can be completely prevented. Further, the resulting fixed images have a very high resistance to friction and abrasion, and troubles such as blurring and flow of the image are not caused at all.

公开(公告)号：CA1119036A

公开(公告)日：1982-03-02

申请号：CA300559

申请日：1978-04-06

Applicant: MITA INDUSTRIAL CO LTD

Inventor： NISHIBAYASHI KATSUMI ,  AMAGAI YOSHIMI ,  HIKAKE NORIO ,  KOUCHI TOSHIHIRO ,  AIZAWA TATSUO

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/097

Abstract: A developer for electrostatic images consisting essentially of particles comprising a pigment, a binder and an offset-preventing agent selected from the group consisting of aliphatic fluorocarbon compounds and fluorochlorocarbon compounds is disclosed. When this developer is used, a high offset-preventing effect can be attained at the fixing step even if the amount incorporated of the offset-preventing agent is small, and further, the developing operation can be performed in good conditions. By incorporation of this offset-preventing agent, the flowability of particles of the developer and charge characteristics of the developer can be remarkably improved.

公开(公告)号：DE2418762A1

公开(公告)日：1974-10-31

申请号：DE2418762

申请日：1974-04-18

Applicant: MITA INDUSTRIAL CO LTD

Inventor： TAKAHASHI KENZI ,  KOUCHI TOSHIHIRO ,  HIRAKATA OSAKA ,  KAMEZAWA YASUTOKI ,  AIZAWA TATSUO

IPC: G03C1/60 ,  G03C5/18

Abstract: An improved process for the diazo-type multicolor reproduction which can give multicolored copies excellent in the hue separation and can increase the number of copies obtained from an original treated with a color-forming agent is disclosed. This improved multicolor reproduction process is characterized by the use of a color-forming composition comprising a thermo-volatile or sublimable coupler and at least one hue separation-improving agent selected from polyalkylene oxides and polyalkylene oxide derivatives which are solid under normal conditions and fatty acid derivatives having a melting point of at least 100 DEG C.