Coating apparatus – Control means responsive to a randomly occurring sensed... – Responsive to condition of coating material
Patent
1983-08-22
1984-06-05
Lawrence, Evan K.
Coating apparatus
Control means responsive to a randomly occurring sensed...
Responsive to condition of coating material
222 57, 324236, 355 3DD, G03G 1509
Patent
active
044521740
ABSTRACT:
A toner concentration sensor assembly wherein a toner cartridge carrying a fresh supply of toner material is demountably insertable into the assembly so as to bring the fresh toner into the original developer mix and wherein a portion of developer mix is metered off the magnetic brush application roller of the apparatus into an inductor surrounding a chute-like, open ended cannister. An electromagnet is used to close the chute by immobilizing the developer mix within the chute while a signal output is taken from the inductance and applied to a sensing circuit to determine the quantity of toner to stabilize the mix concentration to a predetermined level for copy printing output. An interconnected mechanism operably associated with the toner cartridge replenishes the toner on command from the system software as a result of a comparison between toner concentration levels and a preset concentration required for clear, clean, crisp printing/copying.
REFERENCES:
patent: 3970036 (1976-07-01), Baer et al.
patent: 4208985 (1980-06-01), Anzai et al.
Chung Edmund M.
Fissell, Jr. Carl
Lawrence Evan K.
Peterson Kevin R.
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