Abstract: A holographic spinner is mounted to a drive motor via a center drive hub containing a self-aligning bearing. Rotational drive is coupled through to the spinner by one or more drive pins. This arrangement permits centrifugal forces of the spinner to perpendicularly align the spinner to the rotor axis while simultaneously maintaining disc centration and positive drive about the axis.

Abstract: Roll fuser apparatus for fixing toner images to copy sheets by the application of heat and pressure. The apparatus is characterized by the provision of a backup roll which can be quickly removed from the apparatus with a minimum of handling. To this end the backup roll is supported in the apparatus by a pair of frame members which are bolted to a backup roll support member which forms an integral part of the apparatus. A pair of hook-like members support the backup roll after the bolts have been removed; therefore, the backup roll need not be handled prior to the removal of the bolts and then it can be simply lifted out of the apparatus. Replacement is likewise simple.

Abstract: Applicator structure for applying toner offset preventing liquid to a heated fuser roll structure for fusing toner images to copy sheets. The applicator structure comprises a wick member and support therefor wherein the support is characterized by having a plurality of concave surfaces each of which can cooperate with the fuser roll structure to retain a different portion of said wick member in engagement with said fuser roll structure. The support is adapted to be manually repositioned relative to the fuser roll so that each of the concave surfaces can be disposed opposite the fuser roll structure.

Abstract: Mechanism for latching a backup roll into engagement with a heated fuser roll structure. The mechanism is characterized by a four pivot linkage including a first fixed pivot supporting the backup roll for movement. The linkage is so arranged as to require a minimum force for holding the backup roll in engagement with the fuser roll structure. Solenoid means serves to actuate the linkage mechanism and also provides the means for maintaining roll engagement at a substantially reduced power requirement compared to the actuating power required.

Abstract: Drive mechanism for a roll fuser employed in a copier apparatus characterized by the provision of input drive means for rotating a fuser roll and also for rotating a backup roll while the two rolls are disengaged, and further characterized by the provision of a flexible drive shaft or coupling for the backup roll which allows for displacement of the backup roll for engagement with the fuser roll. A sump containing offset preventing liquid and means for applying the liquid to the fuser roll structure are disposed beneath the fuser roll structure which, in turn, is positioned below the backup roll. The drive means is so positioned relative to the sump as to preclude contamination therefrom entering the sump.