Toner process control system based on toner developed mass, refl

Details Toner process control system based on toner developed mass, refl Toner process control system based on toner developed mass, refl

1991-12-31

1992-10-13

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355246, G03G 1500

Patent

active

051555301

ABSTRACT:
A method for controlling toner developed mass per unit area in an electrostatic or electrophotographic device includes the steps of: forming a toner image on a printing sheet; measuring a toner density of the toner image on the printing sheet; measuring a gloss of the toner image on the printing sheet; determining a toner developed mass per unit area for the measured gloss and measured toner density; and adjusting a voltage of a developement field in the electrostatic device in accordance with the determined toner developed mass per unit area. An apparatus for controlling toner developed mass per unit area in an electrostatic device includes: means for fusing a toner image onto a printing sheet; means for measuring a toner density of toner particles on the fused toner image; means for measuring a gloss of the fused toner image on the printing sheet; means for determining toner developed mass per unit area for the measured gloss and measured toner density; and means for adjusting a voltage of a development field in a range in which the toner developed mass per unit area and the voltage of the development field are related so that an increase in the voltage leads to an increase in the toner developed mass per unit area, and a decrease in the voltage leads to a decrease in the toner developed mass per unit area.

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patent: 4829336 (1989-05-01), Champion et al.
patent: 5053307 (1991-10-01), Houle et al.

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