Bipolar-duty cycle controllable DC corona power supply
AssigneeEastman Kodak Company
InventorsEdward J Sullivan, John P Marcelletti
Life of this patent
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Abstract
A power supply adapted for use with a corona charger. The power supply includes a first DC power source providing an electrical potential above a predetermined reference potential, and a second DC power source providing an electrical potential below such predetermined reference potential. A main circuit having an output adapted to be connected to a corona charger, includes a switching circuit for selectively turning the first and second DC power sources on and off in a manner so as to provide a an electrical potential having an AC waveform output for the main circuit.
Claims8
A power supply adapted for use with a corona charger, said power supply comprising:
- a first DC power source providing an electrical potential above a predetermined reference potential;
- a separate second DC power source providing an electrical potential below said predetermined reference potential;
- a power supply circuit having an output adapted to be connected to a corona charger, said circuit including a switching circuit for selectively turning said first and second DC power sources on and off in a manner so as to provide a an electrical potential having an AC waveform output for said power supply circuit, and a blocking circuit effective to prevent said first and second DC power sources from being turned on at the same time.
A corona charger, for use with a reproduction apparatus or the like, including a power supply, said power supply comprising:
- a first DC power source providing a positive electrical potential relative to a predetermined reference potential;
- a separate second DC power source providing a negative electrical potential relative to said predetermined reference potential;
- a power supply circuit having an output adapted to be connected to a corona charger, said circuit including a switching circuit for selectively turning said first and second DC power sources on and off in a manner so as to provide a an electrical potential having an AC waveform output for said power supply circuit, and a blocking circuit effective to prevent said first and second DC power sources from being turned on at the same time.
Dependencies are inferred from the claim text.