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US 6,117,602 AGranted
Electrostatic printing method and apparatus having enhanced image resolution characteristics
AssigneeXerox Corporation
InventorsChu-heng Liu, Weizhong Zhao
Life of this patent
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Abstract
A method and apparatus for enhancing image resolution characteristics of an electrostatographic printing device use toners of opposite polarity to generate a toner image.
Claims24
An image forming apparatus comprising:
- an image support;
- a first toner applicator that deposits first toner having a first polarity on the image support;
- a second toner applicator that deposits second toner having an opposite polarity on the image support;
- and
- a charge pattern generator that generates an electrostatic charge pattern on a photoreceptor separate from the image support that is used to operate on at least one of the first and second toner to create a toner image, that includes first and second toner, on the image support.
2 more elements
An image forming apparatus using a contact electrostatic printing process, comprising:
- an image support;
- a first toner applicator that deposits first toner having a first polarity on a support, the first toner having a solid concentration of approximately 10-50%;
- a second toner applicator that deposits second toner having an opposite polarity on a support, the second toner having a solid concentration of approximately 10-50%;
- and
- a charge pattern generator that generates an electrostatic charge pattern that is used to operate on at least one of the first and second toner to create a toner image, that includes first and second toner, on the image support.
2 more elements
A method of generating a toner image, comprising:
- depositing a first toner having a first polarity and having a solid concentration of approximately 10-50% on a support;
- depositing a second toner having an opposite polarity and having a solid concentration of approximately 10-50% on a support;
- and
- generating an electrostatic charge pattern that is used to operate on at least one of the first and second toner to create a toner image, that includes first and second toner, on an image support.
1 more element
A printing apparatus comprising:
- first toner applicator means for depositing a first toner having a first polarity and having a solid concentration of approximately 10-50% on a support;
- second toner applicator means depositing a second toner having an opposite polarity and having a solid concentration of approximately 10-50% on a support;
- and
- electrostatic charge pattern generating means for generating an electrostatic charge pattern that is used to operate on at least one of the first and second toner to create a toner image, that includes first and second toner, on an image support.
1 more element
Dependencies are inferred from the claim text.