Electrostatic reproduction apparatus with photoconductive means to control the applied voltage at the copy sheet surface

Claim 1

IN A DUPLICATING MACHINE DESIGNED TO PRINT INFORMATION ON A SHEET OF COPY MATERIAL UNDER THE CONTROL OF PRINTED INFORMATION APPEARING ON AN ORIGNIAL INCLUDING (A) A LAYER OF PHOTOCONDUCTOR MATERIAL HAVING FIRST AND SECOND TERMINALS; (B) LIGHT CONUCTOR MEANS HAVING A PREDETERMINED INDEX OF REFRACTION FOR SUPPORTING SAID LAYER AND CONDUCTING LIGHT TO SAID LAYER; (C) LIGHT REFLECTOR MEANS JACKETING SAID LIGHT CONDUCTOR MEANS HAVING AN INDEX OF REFRACTION LESS THAN SAID PREDETERMINED INDEX FOR CONTROLLING THE REFLECTION OF LIGHT THROUGH SAID LIGHT CONDUCTOR MEANS AND REFLECTION OF LIGHT TO SAID LAYER; (D) SAID COPY MATERIAL HAVING FIRST AND SECOND SURFACES AND SAID SECOND SURFACE BEING ADJACENT THE SECOND TERMINAL OF SAID LAYER AND MOVABLE IN RELATION THERETO; (E) SAID ORIGINAL BEING ADAPTED TO CONTROL THE ADMITTANCE OF LIGHT TO SAID LIGHT CONDUCTOR MEANS AS A FUNCTION OF THE PREINTED INFORMATION THEREON AND THE POSITION OF SAID PRINTED INFORMATION IN RELATION TO SAID LIGHT CONDUCTOR MEANS; THE IMPROVEMENT COMPRISIING (F) A SOURCE OF PRINTING MATERIAL AND MEANS FOR BRINGING SAID PRINTING MATERIAL IN CONTACT WITH THE FIRST SURFACE OF SAID COPY MATERIAL DIRECTLY OPPOSITE THE SECOND TERMINAL OF SAID LAYER;