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<Toner Replenishing Sleeve/Magnet Roller>
N3, S2 : The developer fed by the Bucket Roller is attracted onto the surface of the
Sleeve Roller.
N2
: The developer brush is formed by this pole. The height of the brush is mod-
erate before the brush is regulated by the Doctor Blade.
S1
: This pole functions to hold the developer brush firmly onto the surface of the
Sleeve Roller as it is fed onto the point of supply to the 1st Sleeve/Magnet
Roller.
N1
: The developer brush is formed so that the developer attracted onto the
Toner Replenishing Sleeve/Magnet Roller is efficiently transferred onto the
1st Sleeve/Magnet Roller.
<1st Sleeve/Magnet Roller>
S2
: The developer fed by the Toner Replenishing Sleeve/Magnet Roller is posi-
tively attracted onto the surface of the Sleeve Roller.
N2, S1 : Two poles are provided between the relatively wide gap between S2 and
N1.
N1
: This is the principal magnetic pole and its lines of magnetic flux at the point
of development are perpendicular to the surface of the PC Drum. Therefore,
when toner is attracted to the latent image, the carrier is firmly held onto the
Sleeve Roller.
S3
: The developer brush is formed so that the developer attracted onto the 1st
Sleeve/Magnet Roller and not used for development is efficiently transferred
onto the 2nd Sleeve/Magnet Roller.
<2nd Sleeve/Magnet Roller>
N3
: The developer fed by the 1st Sleeve/Magnet Roller is positively attracted
onto the surface of the Sleeve Roller.
S1
: This is the principal magnetic pole and its lines of magnetic flux at the point
of development are perpendicular to the surface of the PC Drum.
S1-N1 : A strong magnetic force is provided between these two poles to ensure that
the carrier is firmly held onto the Sleeve Roller.
S2-N2 : The magnetic flux density between these two poles is made low to ensure
that the developer remaining on the Sleeve Roller is smoothly recycled to
the Developer Mixing Chamber. The developer which has fallen off the
Sleeve Roller is mixed together with fresh toner in the Developer Mixing
Chamber.
N2-N3 : The interval between these two poles is wide and there is the Developer
Regulator installed between them. This prevents the developer remaining
on the Sleeve Roller from being fed back to the PC Drum.
M-56
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