Variable sheet length electrostatic copier

Claim 1

IN APPARATUS FOR PRODUCING A COPY OF AN ORIGINAL, MEANS FORMING A FIXED EXPOSURE WINDOW PAST WHICH AN ORIGINAL IS TO BE MOVED, MEANS FORMING A SECOND WINDOW PAST WHICH COPY MATERIAL IS TO BE MOVED, AN ORIGINAL TRANSPORT SYSTEM FOR MOVING AN ORIGINAL ALONG A PATH PAST SAID FIRST WINDOW, A SUPPLY OF COPY MATERIAL, MEANS ADAPTED TO BE ACTUATED TO CUT MATERIAL PASSING THEREBY, MEANS ADAPTED TO BE ACTUATED TO FEED MATERIAL FROM SAID SUPPLY SUCCESSIVELY PAST SAID CUTTING MEANS AND SAID SECOND WINDOW, A SENSOR DISPOSED ALONG SAID ORIGINAL TRANSPORT PATH AHEAD OF SAID WINDOW, MEANS MOUNTING SAID FIRST AND SECOND WINDOW FORMING MEANS IN SPACED RELATIONSHIP AT LOCATIONS AT WHICH THE DISTANCE BETWEEN SAID SENSOR AND SAID FIRST WINDOW CORRESPOND TO THE DISTANCE BETWEEN SAID CUTTER AND SAID SECOND WINDOW, MEANS RESPONSIVE TO ACTUATION OF SAID SENSOR BY AN ORIGINAL MOVING INTO SAID TRANSPORT SYSTEM FOR ACTUATING SAID COPY MATERIAL FEEDING MEANS AND MEANS RESPONSIVE TO RELEASE