Electrophotography – Diagnostics – Consumable
Reexamination Certificate
2000-01-20
2001-05-22
Chen, Sophia S. (Department: 2852)
Electrophotography
Diagnostics
Consumable
C399S043000
Reexamination Certificate
active
06236814
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a printing control apparatus, and more particularly, to a printing control apparatus capable of carrying out printing with high density printing.
In general, it is necessary for a printing device to use much toner when the printing device carries out a printing with a high density. When the quantity of the toner coming out of a developing unit becomes greater than the quantity of the toner which is fed into the developing unit, the printing result gradually becomes thin.
The developing unit has a restriction in the maximum printing density when the printing device carries out a continuous printing. A conventional printing device does not control the printing density on the continuous printing. The conventional printing device carries out the continuous printing in no concern with the printing density. As a result, the printing result gradually becomes thin in the conventional printing device.
SUMMARY OF THE INVENTION
It is therefore an object of this invention to provide a printing control apparatus capable of carrying out a printing control in accordance with a printing density.
Other objects of this invention will becomes clear as the description proceeds.
On the describing the gist of this invention, it is possible to understand that a printing control apparatus controls a printing device comprising a developing unit provided with a printing drum for carrying out a printing, toner feeding means for feeding a toner into the developing unit, and a carrying motor for carrying a paper to the printing drum. According to this invention, the printing control apparatus comprises detecting means for detecting a toner quantity in the developing unit to produce a detected toner quantity and control means for controlling the carrying motor to stop the carrying motor during a predetermined stop time duration in accordance with the detected toner quantity when the detected toner quantity is less than a predetermined toner quantity, the control means controlling the toner feeding means to drive the toner feeding means during a predetermined driving time duration in accordance with the detected toner quantity when the detected toner quantity is less than the predetermined toner quantity.
REFERENCES:
patent: 5669037 (1997-09-01), Sugiyama
patent: 5754916 (1998-05-01), Kitayama et al.
patent: 63-287979 (1988-11-01), None
patent: 63-287980 (1988-11-01), None
patent: 3-171166 (1991-07-01), None
patent: 3-185478 (1991-08-01), None
patent: 9-138560 (1997-05-01), None
Chen Sophia S.
NEC Corporation
Ostrolenk Faber Gerb & Soffen, LLP
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