Xerographic developing apparatus

Claim 1

DEVELOPING APPARATUS FOR DEVELOPING ELECTROSTATIC LATENT IMAGES ON A XEROGRAPHIC PLATE BY SELECTIVELY CASCADING DEVELOPER MATERIAL THEREACROSS ACCORDING TO THE ELECTRICAL CHARACTERISTICS OF THE LATENT IMAGE COMPRISING CONTIGUOUS WALLS FORMING AN ELONGATED HOUSING WHEREIN ONE OF SAID LONGITUDINALLY EXTENDING WALLS BEING FORMED WITH AN OPENING THEREIN TO RECEIVE A XEROGRAPHIC PLATE HAVING AN ELECTROSTATIC LATENT IMAGE TO BE DEVELOPED EXPOSED TO THE INTERIOR OF SAID HOUSING, MOVABLE SUPPORT MEANS SUSPENDED FROM A ROTATABLE SHAFT AND BEING ASSOCIATED WITH SAID HOUSING FOR SUPPORTING THE SAME IN A PLATE LOADING CONDITION, A BACKING ELECTRODE EXTENDING PARALLEL TO SAID PLATE AND BEING MOVABLE FROM A FIRST POSITION CLOSELY SPACED TO SAID PLATE ASSOCIATED WITH TONE COPY TO A SECOND POSITION SPACED FARTHER FROM SAID PLATE ASSOCIATED WITH LINE COPY, CHAMBER MEANS LOCATED AT ONE END OF SAID HOUSING TO SEPARATELY CONTAIN AT LEAST TWO DIFFERENT DEVELOPER MATERIALS ONE MATERIAL BEING ASSOCIATED WITH PRODUCING LINE AND ANOTHER MATERIAL FOR TONE COPY, SAID CHAMBER MEANS BEING IN COMMUNICATION WITH THE INTERIOR OF SAID HOUSING AND INCLUDING A DISPLACEABLE WALL MEMBER PIVOTALLY MOUNTED ON A COMMON WALL CENTRALLY LOCATED IN SAID CHAMBER, SAID DISPLACEABLE WALL MEMBER BEING MOVABLE FROM A FIRST POSITION TO CLOSE OFF ONE SIDE OF SAID CHAMBER ALLOWING A ONE OF SAID MATERIALS TO BE CASCADED AND BEING MOVABLE TO A SECOND POSITION TO CLOSE OFF THE OTHER SIDE OF SAID CHAMBER ALLOWING THE OTHER SAID MATERIAL TO BE CASCADED, MOTOR DRIVEN DRIVE MEANS CONNECTED TO SAID HOUSING AND ADAPTED TO SWING SAID HOUSING ABOUT THE AXIS OF SAID SHAFT IN A FIRST DIRECTION TO A FIRST CASCADE POSITION AND THEN IN A SECOND DIRECTION TO A SECOND CASCADE POSITION, CAM MEANS POSITIONED ON SAID SUPPORT MEANS AN ENGAGEABLE WITH A PAIR OF SWITCHES, A ONE OF SAID SWITCHES BEING LOCATED IN THE FIRST DIRECTION PATH OF SAID HOUSING, AND THE OTHER BEING LOCATED IN THE SECOND DIRECTION PATH, SAID MOTOR DRIVEN DRIVE MEANS BEING RESPONSIVE TO THE ACTUATION OF SAID SWITCHES TO STOP THE SWING OF SAID HOUSING BEYOND A PREDETERMINED POSITION DEFINED BY THE PLACEMENT OF EACH OF SAID SWITCHES, SAID CAM MEANS INCLUDING A DISPLACEABLE CAMMING SURFACE FOR ADJUSTING THE ANGULAR DISPLACEMENT OF SAID HOUSING AT WHICH SAID SWITCHES ARE ENGAGED FROM ONE POSITION IN THE CASE OF LINE COPY TO ANOTHER POSITION IN THE CASE OF TONE COPY. TIMING MEANS RESPONSIVE TO ACTUATION OF SAID SWITCHES AND OPERABLE TO INTERRUPT THE MOVEMENT OF SAID MOTOR DRIVEN MEANS FOR A PREDETERMINED TIME INTERVAL TO DEFINE THE TIME DURATION AT WHICH SAID HOUSING REMAINS IN SAID FIRST AND SECOND CASCADE POSITIONS, SAID TIMING MEANS INCLUDING A MOVABLE STOP MEMBER FOR PERMITTING THE ADJUSTMENT OF THE TIME INTERVAL FOR WHICH SAID MOTOR DRIVEN DRIVE MEANS IS INTERRUPTED, SAID STOP MEMBER HAVING AFIRST POSITION ASSOCIATED WITH LINE COPY AND A SECOND POSITION ASSOCIATED WITH TONE COPY, AND CONTROL MEANS TO CONJOINTLY MOVE SAID DISPLACEABLE WALL MEMBER, SAID BACKING ELECTRODE, SAID CAMMING SURFACE, AND SAID STOP MEMBER TO PROVIDE LINE OR TONE DEVELOPMENT AS AFORESAID IN ACCORDANCE WITH THE ELECTRICAL CHARACTERISTICS OF THE LATENT IMAGE TO BE DEVELOPED.