Abstract: An apparatus and method for ink-jet printing onto an intermediate drum in a helical pattern while correcting for image skew and aliasing. A plurality of ink-jet print heads place an image on an intermediate drum, impervious to ink, in a helical patter. To compensate for helical printing, the image is altered by nozzle placement and image manipulation to correct for skewing errors, and thereafter, the nozzle timing is adjusted to correct for aliasing. The plurality of print heads move parallel to the axis of rotation of the drum while the drum is simultaneously rotating, causing the image to be placed in a helical pattern. Once the entire image is placed on the drum, paper is rolled against the drum under pressure and the image is transferred thereto.

Abstract: The invention relates to an ink cartridge body which is removably mountable in a printer carriage area of an ink jet printer and an alignment and latching mechanism for the ink cartridge body. The printer carriage area includes at least first and second spaced-apart elongate guide rails and the ink cartridge body includes a printhead and at least two bearing points at predetermined locations on the ink cartridge body, each of the bearing points disposed on the cartridge body for separately engaging at least one of the elongate guide rails for aligning and maintaining the printhead in a predetermined orientation relative to the print media in the printer. The invention substantially reduces the number of parts and tolerances thereof required for aligning a printhead relative to a print media by directly aligning the cartridge body rather than the carrier in the carriage area of the printer.

Abstract: The invention relates to an ink cartridge body which is removably mountable in a printer carriage area of an ink jet printer and an alignment and latching mechanism for the ink cartridge body. The printer carriage area includes at least first and second spaced-apart elongate guide rails and the ink cartridge body includes a printhead and at least two bearing points at predetermined locations on the ink cartridge body, each of the bearing points disposed on the cartridge body for separately engaging at least one of the elongate guide rails for aligning and maintaining the printhead in a predetermined orientation relative to the print media in the printer. The invention substantially reduces the number of parts and tolerances thereof required for aligning a printhead relative to a print media by directly aligning the cartridge body rather than the carrier in the carriage area of the printer.