Photocopying – Contact printing – Light boxes
Patent
1995-01-19
1996-12-03
Grimley, Arthur T.
Photocopying
Contact printing
Light boxes
118653, G03G 1506
Patent
active
055813348
ABSTRACT:
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.
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Bortolin Renato
Dal Bianco Riccardo
Forlani Riccardo
Guelfo Roberto
Dang T. A.
Grimley Arthur T.
Olivetti-Canon Industriale S.p.A.
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