Method for gloss control in an electrographic apparatus
AssigneeAgfa-Gevaert
InventorsLuc Van Goethem, Serge Tavernier, Marc De Niel
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Abstract
A method for achieving a pre-selected gloss in an electrographic image printing system, by choosing the appropriate combination of fusing speed and fusing temperature. As a result of the above, the homogeneity in gloss and color of one image and the homogeneity of different images, compared to each other, can be improved significantly.
Claims30
A method for fusing a toner image to a sheet to achieve a homogeneous and pre-defined gloss comprising the following steps:
- establishing a gloss value for said pre-defined gloss;
- selecting a fusing temperature in accordance with said gloss value;
- selecting a fusing period in accordance with said gloss value;
- controlling the fusing temperature of at least one fuser roller within a narrow range encompassing said selected temperature;
- and,
- fusing said toner image to said sheet by pressing toner and said sheet in rolling contact with said fuser roller.
An apparatus for fusing a toner image to a sheet to achieve a homogeneous and pre-defined gloss comprising:
- means for establishing a gloss value for said pre-defined gloss;
- means for selecting a fusing temperature in accordance with said gloss value;
- means for controlling the fusing temperature of at least one fuser roller within a narrow range encompassing said selected temperature;
- means for fusing said toner image to said sheet by pressing toner and said sheet in rolling contact with said fuser roller;
- and
- means for selecting a fusing period for said means for fusing in accordance with said gloss value.
An apparatus for fusing a toner image to a sheet to achieve a homogeneous and pre-defined gloss comprising:
- a gloss meter;
- a gloss value established by the gloss meter for said predefined gloss;
- a microprocessor for selecting a fusing temperature in accordance with said gloss value, and for selecting a fusing period for said means for fusing in accordance with said gloss value;
- a temperature controller for controlling the fusing temperature of at least one fuser roller within a narrow range encompassing said selected temperature;
- a fuser for fusing said toner image to said sheet by pressing toner and said sheet in rolling contact with said fuser roller.
Dependencies are inferred from the claim text.