Abstract: An apparatus for routing interpolator input data for a color space conversion from a RGB color space to a CMYK color space includes a selective two's complementer coupled to a hardware interpolator. The inputs to the selective two's complementer include three sets of four lower order bits, RL, GL, and BL of a twenty four bit RGB color space value and three least significant bits of three sets of four higher order bits, RH, GH, and BH. The inputs to the hardware interpolator include three outputs from the selective two's complementer and eight inputs for receiving interpolator input data from eight memory banks. The interpolation process can be regarded as determining a location within a cube of a cubic lattice formed from vertices represented by the interpolator input data values.

Abstract: A spacer apparatus for providing separation between a photoconductor drum and a charge roller in an electrophotographic printing system prior to first use includes a first and a second spacer member pivotally mounted to the shaft of the charge roller. Attached to the first and the second spacer members are, respectively, a first and a second spacer cam which contact the photoconductor drum in a region outside of the electrostatic latent image forming area of the photoconductor drum. Prior to the first rotation of the photoconductor drum, the first and second spacer cams maintain separation between the photoconductor drum and the charge roller. After the first rotation of the photoconductor drum, the first and second spacer cams rotate about the shaft of the charge roller and permit the charge roller to be engaged against the photoconductor drum by the compression springs.