Olivetti-canon Industriale S.p.a.

Renato Bortolin

Roberto Guelfo

Riccardo Forlani

Michele Olivero

Riccardo Dal Bianco

In an electrostatic image developing device for electrical photocopiers, a magnetizable one-component toner, initially contained in a removable container, is fed, by the action of a rotating flexible strip, through a development chamber towards a rotating non-magnetic development roller surrounding a number of stationary permanent magnets, forming on it a magnetic brush, whose thickness is controlled by a non-magnetic flexible blade pressed against the surface of the development roller; the development chamber is fitted with three stirring bars made of non-magnetic material, each bar describing a different closed path in different zones of the development chamber in such a way as to avoid the formation of lumps and to maintain the correct fluidity of the toner. In addition, a metallic wire is fitted in the development chamber and acts as a sensor device to detect when the removable container is nearly empty of toner.

Electrostatic image developing device having toner flow control and

A ventilation device for a photocopier draws ozone mixed air from a developing unit and image transfer unit and forwards it to ventilate a fusion unit where the subsequent heating of the air reduces the ozone content. The air flow evacuates the condensed water issued by the sheets of paper during the fixing.

Ventilation and cooling device for a photocopier

In photocopying and/or printing machines, the blower or fan used for internal ventilation is suspended from the structure of the machine by springs slung between the blower casing and the machine structure to eliminate the transmission of vibrations to delicate members in the machine itself.

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Montanaro, Italy

Renato Bortolin