Title: Method of ion imaging with additional control fields

Abstract: An ion modulator process capable of producing copies of high contrast and with low background utilizes a constant charge density applied in the dark to set up uniform fringing fields which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original uniform fringing fields by simultaneous imaging and ion projection decreasing the effect of such fringing fields and permitting ions to pass through the modulator in image areas.

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Inventors: Jackson, Jerome E. (Shaker Heights, OH, US)

Application Number: 515172
Filing Date: 1974-10-16
Publication_date: 1976-09-14
Assignee: Addressograph Multigraph Corporation (Cleveland, OH)
Primary Class(es): 430/53 347/123, 347/224, 399/159
Other Classes:
US Patent Ref:

3645614	Feb, 1972	McFarlane	96/1.
3680954	Aug, 1972	Frank	96/1.
3694200	Sep, 1972	Pressman	96/1.
3761173	Sep, 1973	Fotland et al.	96/1.
3881921	May, 1975	Frank	96/1.

Other Refs:
Primary Examiner: Martin, Jr., Roland E.
Assistant Examiner: Hightower, Judson R.
Attorney: Kondzella; Michael A.