The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1978
Filed:
Mar. 25, 1975
Applicant:
Inventors:
Jerome E Jackson, Shaker Heights, OH (US);
John D Blades, Chagrin Falls, OH (US);
Assignee:
Addressograph-Multigraph Corp., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
96 / ; 96 / ; 355 / ;
Abstract
An ion modulator having a bias electrode is capable of producing copies in which the contrast and background are controllable. Such modulator functions in a process which utilizes an adjustable charge density applied to set up uniform fringing fields of the desired magnitude which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original 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.