Abstract Auto bias control apparatus for controlling the potential applied to a development electrode of a development station includes a sensor for sensing the electrostatic field strength of longitudinal increments of a charged image area of a movable photoconductor upstream from the development station to produce an analog signal representative thereof. The apparatus further includes an analog to digital converter adapted to convert the analog signals to a digital signal, and a digital storage device such as a digital computer for storing such digital signals and at a selected time cause appropriate digital signals to be applied to a digital-to-analog converter wherein it is reconverted to an analog form and applied to the development electrode just as its corresponding movement of the image area enters the development station.
Inventors
👤 Stephen Royce Rowell
👤 David Charles Hogan
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-23 19:13
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD FOR CONTROLLING THE POTENTIAL APPLIED TO A DEVELOPMENT ELECTRODE OF A DEVELOPMENT STATION COMPRISING THE STEPS OF: A. SENSING DOWNSTREAM OF THE DEVELOPMENT STATION THE CHARGE LEVEL OF LONGITUDINAL INCREMENTS OF A CHARGED IMAGE AREA MOVING ALONG A PREDETERMINED PATH AT SUBSTANTIALLY A CONSTANT SPEED, AND PRODUCING FIRST ANALOG SIGNALS REPRESENTATIVE THEREOF; B. CONVERTING SAID FIRST ANALOG SIGNALS TO DIGITAL SIGNALS AND STORING SAME AT PARTICULAR STORAGE LOCATIONS; AND C. RECONVERTING AFTER SELECTED TIME DELAY EACH OF SAID DIGITAL SIGNALS TO A SECOND ANALOG SIGNAL AND APPLYING A CORRESPONDING POTENTIAL TO SAID SECOND ANALOG SIGNAL TO SAID ELECTRODE.
Claim 2
Independent Claim
100 words
A METHOD FOR CONTROLLING THE POTENTIAL APPLIED TO A DEVELOPMENT ELECTRODE OF A DEVELOPMENT STATION COMPRISING THE STEPS OF: A. SENSING DOWNSTREAM OF THE DEVELOPMENT STATION THE CHARGE LEVEL OF LONGITUDINAL INCREMENTS OF A CHARGED IMAGE AREA MOVING ALONG A PREDETERMINED PATH AT SUBSTANTIALLY A CONSTANT SPEED, AND PRODUCING FIRST ANALOG SIGNALS REPRESENTATIVE THEREOF; B. CONVERTING SAID FIRST ANALOG SIGNALS TO DIGITAL SIGNALS AND STORING SAME AT PARTICULAR STORAGE LOCATIONS; AND C. RECONVERTING AFTER SELECTED TIME DELAY EACH OF SAID DIGITAL SIGNALS TO A SECOND ANALOG SIGNAL AND APPLYING A CORRESPONDING POTENTIAL TO SAID SECOND ANALOG SIGNAL TO SAID ELECTRODE.