Specifications

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 moderate 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 positively 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-74