Olivetti d-Copia 600, Руководство по обслуживанию

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2-1-17
(1) Single component developing system
This machine uses the single component developing system, and reversal processing is performed with a + charged drum
(a-Si) and a + charged magnetic toner.
With the single component developing system, toner is electrically charged by friction with the developing sleeve and +
charged when it passes through the magnetic doctor blade.
The toner that has passed through the magnetic doctor blade forms a uniform layer on the developing sleeve.
When the toner layer comes to the location where the developing sleeve is the nearest to the drum, toner moves between
the drum and the developing sleeve by an electric field.
Then, when the developing sleeve passes through the nearest location to the drum, on the portion of the drum that has
been exposed to light, toner is attracted toward the drum by potential difference between the developing bias and the
drum surface and development is performed.
On the other hand, on the portion of the drum that has not been exposed to light, toner is attracted toward the sleeve and
development is not performed.
When toner comes to an area where the gap between the drum and the developing sleeve is large, an electric field disap-
pears and toner does not leave the developing sleeve. Development is complete.
Figure 2-1-18 Single component developing system
Drum
Developing sleeve
North pole
South pole
Developing blade
Developing blade magnet
Toner
Y104350-7 Sevice Manual