Xerographic fusing apparatus

Claim 1

A CONTACT HEAT FUSING DEVICE FOR FIXING THERMOPLASTIC RESIN MATERIAL CARRIED ON A SUPPORT MATERIAL, SAID DEVICE INCLUDING: FRAME MEANS, A FIRST ROLLER MOUNTED ON A SHAFT JOURNALED IN SAID FRAME MEANS, A SECOND ROLLER HAVING DEFORMABLE MATERIAL ON THE OUTER PERIPHERY THEREOF, SAID SECOND ROLLER HAVING A SHAFT JOURNALED FOR ROTATION AND MOVEMENT FROM A FIRST POSITION WHEREIN SAID SECOND ROLLER IS OUT OF CONTACT WITH SAID FIRST ROLLER TO A SECOND POSITION WHEREIN SAID SECOND ROLLER IS IN COOPERATING PRESSURE CONTACT WITH SAID FIRST ROLLER, ACTUATOR MEANS CONNECTED TO SAID SECOND ROLLER FOR MOVING SAID ROLLER FROM SAID FIRST POSITION WHEREIN SAID ROLLER IS OUT OF OPERATIVE RELATION WITH SAID FIRST ROLLER TO SAID SECOND POSITION WHEREIN SAID SECOND ROLLER IS IN COOPERATIVE RELATION TO SAID FIRST ROLLER, MEANS TO HEAT SAID FIRST ROLLER HAVING DIRECT CONTACT WITH RESIN MATERIAL CARRIED ON THE SUPPORT MATERIAL, MEANS CONNECTING THE SHAFT OF SAID FIRST ROLLER TO THE SHAFT OF SAID SECOND ROLLER, A SINGLE DRIVE CONNECTED TO SAID ACTUATOR MEANS AND SECOND ROLLER AND ARRANGED FOR MOVING THE SECOND ROLER TO SAID SECOND POSITION WHEREIN THE SECOND ROLLER IS IN COOPERATING RELATION TO SAID FIRST ROLLER, SAID SINGLE DRIVE BEING ADAPTED TO DRIVE THE SHAFT OF THE SECOND ROLLER AT A PREDETERMINED SPEED FOR IMPARTING ROTATION TO THE SAME AND SAID FIRST ROLLER FOR ADVANCING A SUPPORT MATERIAL THEREBETWEEN, SAID MEANS FOR DRIVING INCLUDING OVERRIDING TORQUE MEANS CONNECTED BETWEEN THE SHAFT OF SAID SECOND ROLLER AND SAID SECOND ROLLER ENABLING THE SAME LINEAL SPEED AT THE POINT OF CONTACT OF SAID FIRST AND SECOND ROLLERS TO BE MAINTAINED WHEN SAID SECOND ROLLER IS IN PRESSURE CONTACT WITH SAID FIRST ROLLER.