Non-electrostatic method for producing electrographic image
Abstract
Abstract A METHOD FOR PRODUCING AN ELECTROGRAPHIC IMAGE FROM AN ORIGINAL PROVIDED WITH A CONDUCTIVITY PATTERN RANGING FROM A PORTION HAVING A GREATER CONDUCTIVITY TO A PORTION HAVING A LESSER CONDUCTIVITY COMPRISING THE STEPS OF PLACING A THIN LAYER OF ELECTRICALLY CHARGEABLE PARTICLES IN ELECTRICAL CONTACT WITH SAID CONDUCTIVITY PATTERN, DISPOSING SAID ORIGINAL AND SAID LAYER OF ELECTRICALLY CHARGEABLE PARTICLES BETWEEN A FIRST AND SECOND ELECTRODE SO THAT SAID ORIGINAL IS INTERPOSED BEWTEEN SAID LAYER OF ELECTRICALLY CHARGEABLE PARTICLES AND SAID SECOND ELECTRODE AND GENERAING AN ALTERNATING ELECTRIC FIELD BETWEEN SAID FIRST AND SECOND ELECTRODES OF SUFFICIENT STRENGTH SO AS TO CHARGE SAID ELECTRICALLY CHARGEABLE PARTICLES WHEREBY SAID PARTICLES RECEIVE ELECTRIC CHARGES HAVING DIFFERENT MAXIMUM VALUES ACCORDING TO THE DIFFERENT CONDUCTIVITIES OF SAID PORTIONS OF SAID CONDUCTIVITY PATTERN WHEREBY THE SAID ELECTRICALLY CHARGED PARTICLES ARE ATTRACTED TOWARD AND AWAY FROM SAID ORIGINAL WHEREBY A PORTION ON SAID ELECTRICALLY CHARGED PARTICLES ARE REMOVED AND THE REMAINDER OF SAID PARTICLES FROM AN ELECTROGRAPHIC IMAGE ON SAID ORIGINAL.
Inventors
- 👤 M Cantarano
Bibliographic Details
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