Ambient atmospheric pressure compensation controller for pressurized copying device
AssigneeXerox Corporation
InventorsKarl B. Ayash, Thomas C. Hollar, Ali R. Dergham, Dennis M. Ankrom
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Abstract
A method and apparatus for maintaining the air pressure within a xerographic module/chamber of an image forming device above ambient pressure outside of the xerographic module/chamber which uses a pressure sensor, e.g., an altimeter to monitor ambient atmospheric pressure, and a microprocessor to control and maintain air pressure to a determined set point.
Claims6
An image forming device comprising:
- a chamber pressurized at a pressure above ambient pressure;
- and
- a xerographic module contained within the pressurized chamber;
- wherein:
- the xerographic module includes a photoreceptor, the chamber having a wall having an opening, and
- a portion of the photoreceptor protrudes through the opening in the chamber wall, such that a small gap is formed between the photoreceptor and the opening in the chamber wall.
An image forming device comprising:
- a chamber pressurized at a pressure above ambient pressure;
- and
- a xerographic module contained within the pressurized chamber;
- an opening in the chamber that reduces the occurrence of rapid pressure loss from the chamber.
An image forming device comprising:
- a chamber pressurized at a pressure above ambient pressure;
- a xerographic module contained within the pressurized chamber;
- and
- a control system that adjusts the pressure within the chamber relative to the ambient pressure outside of the chamber.
A method of maintaining air pressure within a xerographic module of an image forming device above an ambient air pressure, comprising:
- measuring the air pressure in the xerographic module;
- measuring the ambient air pressure outside the xerographic module;
- determining a target range of air pressures within the xerographic module which are above the ambient air pressure;
- and
- maintaining the air pressure inside of the xerographic module within the target air pressure range.
Dependencies are inferred from the claim text.