Xerographic fixing apparatus

Claim 1

APPARATUS FOR FIXING A POWDER IMAGE TO THE SURFACE OF A SHEET OF SUPPORT MATERIAL, SAID APPARATUS INCLUDING AN ENDLESS CONVEYOR MECHANISM FOR TRANSPORTING A SHEET IN A CLOSED PATH FROM A SHEET RECEIVING STATION TO A SHEET DELIVERY STATION, A FIRST RADIANT GLASS PANEL AND A SECOND RADIANT GLASS PANEL POSITIONED BETWEEN SAID SHEET RECEIVING STATION AND SAID DELIVERY STATION IN SPACED PARALLEL RELATION TO EACH OTHER TO FORM A CHAMBER THEREBETWEEN THROUGH WHICH SAID ENDLESS CONVEYOR MECHANISM CAN TRANSPORT A SHEET OF SUPPORT MATERIAL, A GATE OPERATIVELY CONNECTED TO SAID FIRST RADIANT GLASS PANEL FOR MOVEMENT FROM A FIRST POSITION IN WHICH SAID GATE EXTENDS SUBSTANTIALLY FROM SAID FIRST RADIANT GLASS PANEL TO SAID SECOND RADIANT GLASS PANEL TO FORM A MOVABLE END WALL OF SAID CHAMBER WHILE STILL PERMITTING SAID ENDLESS CONVEYOR MECHANISM TO OPERATE, TO A SECOND POSITION IN WHICH SAID GATE IS POSITIONED AWAY FROM SAID SECOND RADIANT GLASS PANEL TO LEAVE SAID CHAMBER UNOBSTRUCTED, AND MEANS CONNECTED TO SAID FIRST RADIANT GLASS PANEL AND TO SAID SECOND RADIANT GLASS PANEL FOR CONNECTING THEM TO A SOURCE OF ELECTRICAL POWER.