Seals And End Magnets - Ricoh FT4430 Service Manual

SEALS AND END MAGNETS

Several seals prevent toner from spilling out into the copier. The upper brush
seal [A] prevents particles from scattering upward. The side seals [B] at the
ends of the development unit contact the drum-ends (out of the image area);
they prevent toner from scattering out of the sides.
Since the internal permanent magnets are shorter than the development roller
sleeve, the toner tends to scatter from both ends. To reduce this scattering of
toner, small magnets [C] are mounted under the ends of the development
roller [D]. These magnets create small magnetic fields that stop developer
particles from scattering.
[ A ]
.
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16 April '88