Hoganas Ab

Kanto Denka Kogyo Co., Ltd.

Hoganas Ag

Ulf F Engstrom

Kazuyoshi Oka

Mitsuhiro Katayama

Kenkichi Hara

Olavi M Mustonen

Bjorn Johansson

Sven E Allroth

Svenn-Erik Larssen

Toshihiko Kohno

Svenn E Larssen

Svenn E Larrssen

Sintered products having improved density

Heat-insulating component and a method of making same

A novel carrier material useful in conjunction with a toner for preparing a two-component developer for electrophotographic processes is provided. The carrier comprises a spherical magnetite particulate material having a reduced metallic iron outer layer which is coated with an outermost resinous layer for conditioning the copying properties of the carrier.

Method of making carrier for use in electrophotographic developers

Carrier for use in electrophotographic developers

The present invention relates to an iron-base powder containing Ni, Mo and C for producing highly resistant sintered bodies under normal pressing and sintering conditions. The powder contains 7-12% by weight of Ni, 0.4-1.5% by weight of Mo, and 0.3-0.7% by weight of C.

Sintered alloy

Powder mixture containing talloil free of segregation

A noval carrier powder for electrophotographic developers is provided. The carrier powder comprises spherical magnetite particles having a wustite (FeO) content of less than 10% by weight, a particle diameter of 30-200 .mu.m and a surface porosity of less than 20%.

A metal powder containing particles of iron or steel and particles of an alloying element is apt to segregation and dusting. It has now been found that segregation and dusting can be reduced or eliminated if the powder contains a binding agent in solid or liquid state. It is preferred to add to the metal powder one of the agents polyethylene glycol, polypropylene glycol, glycerine, and polyvinyl alcohol, in a quantity of 0.005-0.2 percent by weight.

Homogeneous iron based powder mixtures free of segregation

Growing community of inventors

Hoganas, Sweden

Ulf F Engstrom