초록 ▼

A magnet roll for use in a developing device for developing an electrostatic latent image in an electrophotographic copier is provided. The magnet roll may be rotatably disposed inside of a developing sleeve so that magnetic toner may be transported along the circumference of the sleeve as magnetica

A magnet roll for use in a developing device for developing an electrostatic latent image in an electrophotographic copier is provided. The magnet roll may be rotatably disposed inside of a developing sleeve so that magnetic toner may be transported along the circumference of the sleeve as magnetically attracted to the peripheral surface of the sleeve. The present magnet roll includes an impeller-shaped support and a plurality of magnet members provided as mounted on the support only at desired locations. The magnet member contains a matrix component, such as nitrile-butadiene rubber, and a magnetic component, such as ferrite powder. Therefore, the present magnet roll is light in weight and sturdy in structure.

대표청구항 ▼

A magnet roll for use in a developing device employing a magnetic developer comprising: a support including a base portion and a plurality of fins extending generally radially outwardly from said base portion and defining a first plurality of regions therebetween; and a second plurality, which is di

A magnet roll for use in a developing device employing a magnetic developer comprising: a support including a base portion and a plurality of fins extending generally radially outwardly from said base portion and defining a first plurality of regions therebetween; and a second plurality, which is different in number from said first plurality, of magnet members each of which is provided in the corresponding one of selected regions defined between any two adjacent ones of said plurality of fins and then each of which includes a composite material which is a mixture of a matrix component and a magnetic component.