Single high voltage supply for use in a multiple developer electrophotographic printer
AssigneeHewlett-Packard Company
InventorB. Mark Hirst
Life of this patent
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Abstract
In order to accomplish the present invention, there is provided a voltage supply system for use in a color electrophotographic printer where the electrophotographic printer has more than one developer. A high voltage AC source receives a select signal that indicates which one of the developers is presently in use. Provided one and only one developer is in use, the alternating current source outputs an AC voltage. A switching network is connected to the HVAC current source and also each developers. The switching network also receives the select signal and routes the AC voltage to the active developer. Stress to the switching elements in the switching network is reduce by proper sequencing of the application and removal of the HVAC and network reconfigurations.
Claims11
A voltage supply system for use in a electrophotographic printer where said electrophotographic printer has a plurality of developers, said system comprising:
- an alternating current source, said alternating current source receives a plurality of select signals for indicating which one of said plurality of developers is in use, said alternating current source outputs an AC voltage when one of said plurality of developers is active;
- and
- a switching network connected to said alternating current source and connected to said plurality of developers, said switching network receives said plurality of select signals and routes said AC voltage to the active developer.
A voltage supply system for use in an electrophotographic printer where said electrophotographic printer has at least two developers, said system comprising:
- a select means for generating a signal indicating which one of said at least two developers is in use;
- an alternating current source connected to said select means, said alternating current source outputs an AC voltage when one of said at least two developers is in use;
- and
- a switching network connected to said alternating current source, said select means, and to each of said at least two developers, in accordance with said signal indicating which one of said at least two developers from said select means, said switching network passes said AC voltage to said developer in use.
Dependencies are inferred from the claim text.