Abstract: A composite torque transfer body and spline assembly includes a torque transfer component made of a first material and having a central body portion and a peripheral torque transfer portion integrally attached to and extending about the central body portion, a spline component made of a second material different from and having stiffness greater than that of the first material of the torque transfer component and also having an elongated tubular spline portion and a collar portion integrally attached to and extending about and radially outward from an end of the spline portion, and a plurality of elements on the central body portion of the torque transfer component and the collar portion of the spline component providing separate press-fitting and securing of the components to one another such that the components are mated and rotatable together about a central axis.

Abstract: A color electrophotographic printing machine has a drive system which includes a first, second and third motor-and-gear-train configurations mounted on a frame and coupled to first, second and third combinations of multiple color developer drive assemblies, multiple color photoconductive drum drive assemblies, a black developer drive assembly and a black photoconductive drum drive assembly. The first and second configurations are operable at first and second motor gear mesh frequencies and the third configuration is operable at a motor gear mesh frequency that can be substantially the same as one of the first and second motor gear mesh frequencies. The first combination includes yellow, cyan and magenta color developer drive assemblies, the second includes yellow and cyan color photoconductive drum drive assemblies, and the third includes a magenta color photoconductive drum drive assembly with the black developer drive assemblies and black photoconductive drum drive assemblies.

Abstract: A composite torque transfer body and spline assembly includes a torque transfer component made of a first material and having a central body portion and a peripheral torque transfer portion integrally attached to and extending about the central body portion, a spline component made of a second material different from and having stiffness greater than that of the first material of the torque transfer component and also having an elongated tubular spline portion and a collar portion integrally attached to and extending about and radially outward from an end of the spline portion, and a plurality of elements on the central body portion of the torque transfer component and the collar portion of the spline component providing separate press-fitting and securing of the components to one another such that the components are mated and rotatable together about a central axis.

Abstract: A color electrophotographic printing machine has a drive system which includes a frame and first, second and third motor-and-gear-train configurations mounted thereon at a common location and respectively drivingly coupled to first, second and third combinations of multiple color developer drive assemblies, multiple color photoconductive drum drive assemblies, a black developer drive assembly and a black photoconductive drum drive assembly so as to operate the same. The first and second configurations are operable at first and second motor gear mesh frequencies that are different and the third configuration is operable at a motor gear mesh frequency that can be substantially the same as one of the first and second motor gear mesh frequencies.

Abstract: Sensor (41) is held between its arms (63) and nubs 60 in cover (31). A circuit board (57) on which the sensor is mounted remains outside of the cover, and panels (55) of the sensor (41) extend upward to prevent the circuit board (57) from collapsing leads (45, 53) which connect the sensor to the circuit board. Reliable operation is obtained without narrow tolerances.