Ricoh M5 Service Manual page 89

– Development Roller –
Floating Electrode
Magnetic
The development roller used in this copier is unique.
ly 300 rpm. Its surface has a floating electrode layer which insulates the surface charge from the
conductor.
These "floating electrodes", which are imbedded in the layer are made of copper and create a strong
Since the electrodes contact the master surface directly, the lines of electric flux are
electric field.
straight. This results in a good, sharp image.
– Toner Metering Blade –
The toner metering blade is made of an iron based material.
roller by the magnetic field
because of the rapid changes in the magnetic field as the roller turns. The vibration allows toner to
pass by.
Toner particles receive a positive triboelectric charge as they move past the toner metering
This charge is created by the rubbing action among the development roller, toner, and toner
blade.
metering blade.
Insulating Layer
of the magnetic rubber layer.
3 - 3 2
The development roller rotates at approximate-
It is attracted against the development
The toner metering blade vibrates
25, 1985
May,