Thermographic apparatus for copying images

Claim 1

IN AN APPARATUS FOR PRODUCING DRY COPIES FROM AN ORIGINAL ON A COPYING SHEET COMPRISING, IN COMBINATION, MOUNTING MEANS, A THERMAL IMAGE-RETAINING TRANSFER AND HEAT STORAGE CYLINDER ROTATABLY SUPPORTED ON SAID MOUNTING MEANS, SAID CYLINDER HAVING AN UPPER PORTION, HEAT RADIATING MEANS MOUNTED WITHIN SAID CYLINDER, SAID RADIATING MEANS IRRADIATING SAID CYLINDER UPPER PORTION, FIRST ROLLER PRESSING MEANS ROTATABLY SUPPORTED ON SAID MOUNT ING MEANS AT A LOCATION OUTSIDE OF SAID CYLINDER AND IN SUCH A MANNER THAT SAID PRESSING MEANS RESILIENTLY ENGAGES SAID UPPER PORTION OF SAID CYLINDER WHICH IS IRRADIATED BY SAID HEATING RADIATING MEANS, SECOND ROLLER PRESSING MEANS ROTATABLY SUPPORTED ON SAID MOUNTING MEANS AT A LOCATION OUTSIDE OF SAID CYLINDER SPACED IN THE DIRECTION OF ROTATION RELATIVE TO SAID FIRST PRESSING MEANS AND RESILIENTLY ENGAGING SAID CYLINDER, A FIRST FEED CHANNEL HAVING AN INLET AND AN OUTLET, SAID OUTLET BEING ADJACENT SAID CYLINDER IN THE PERIPHERAL ZONE THEREOF BETWEEN SAID FIRST AND SAID SECOND PRESSING MEANS AND EXTENDING TOWARD SAID SECOND PRESSING MEANS, STORAGE MEANS DEFINED WITHIN SAID MOUNTING MEANS INTERMEDIATE SAID CYLINDER AND SAID FIRST CHANNEL OUTLET AND HAVING AN OUTLET OPENING DISPOSED ADJACENT THE OUTLET OF SAID FIRST CHANNEL AND INTERMEDIATE SAID FIRST CHANNEL OUTLET AND SAID CYLINDER, CLOSURE MEANS SELECTIVELY OPENING AND CLOSING SAID STORAGE MEANS OUTLET OPENING, SPRING MEANS BIASING SAID CLOSURE MEANS TOWARD ITS CLOSED POSITION, ACTUATING MEANS DEFINED ON SAID CLOSURE MEANS EXTENDING INTO THE OUTLET OF SAID FIRST CHANNEL AND OPERABLE BY A COPYING SHEET BEING ADVANCED THROUGH SAID FIRST CHANNEL SO AS TO OPEN SAID CLOSURE MEANS DURING THE PASSAGE OF SAID SHEET, A SECOND FEED CHANNEL HAVING AN INLET FOR FEEDING AN ORIGINAL INTERMEDIATE SAID FIRST PRESSING MEANS AND SAID CYLINDER, AND DRIVE MEANS DRIVING SAID CYLINDER.