Magnetic developing unit with improved toner decorator for magne

Details Magnetic developing unit with improved toner decorator for magne Magnetic developing unit with improved toner decorator for magne

1982-08-12

1984-06-12

Lawrence, Evan K.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

Electrostatic and/or electromagnetic attraction or...

118636, B05C 502

Patent

active

044534922

ABSTRACT:
Disclosed is a magnetic developing unit having a decorator for applying magnetic toner to a latent magnetic image in a downwardly moving magnetic imaging member. Preferably the imaging member is in the surface of a cylinder and the decorator is at the 3 o'clock or 9 o'clock position. The decorator comprises a housing containing a lower toner supply and background cleaner roll, an intermediate toner transfer roll and an upper toner decorator roll. Each of the rolls comprises a rotating non-magnetic sleeve and a plurality of elongated internal magnets which alternate in polarity adjacent the rotating sleeve and their relative positions are adjustable.

REFERENCES:
patent: 3455276 (1969-07-01), Anderson
patent: 3601091 (1971-08-01), Preckshot
patent: 3828730 (1974-08-01), Yamashita et al.
patent: 3921577 (1975-11-01), Howard et al.
patent: 3977361 (1976-08-01), Nagashima et al.
patent: 4267201 (1981-05-01), Nakahara et al.

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