Abstract: A printer and a method for printing is described in which bleed between secondary color regions having different colors is minimized by the formation of a border strip which has a color which is common to both secondary color regions. In a printer assembly which includes a print head for depositing ink onto a media, an improved image may be formed by processing the data before the image is printed such that a border strip is formed between adjoining regions of different secondary colors. The border strip is printed in a color which is common to both of the secondary color regions. Thus, because the color which is common to both secondary color regions is printed in the border region, the contrast between the three areas of different colors is minimized. In addition, the reduced volume of ink within the border strip further minimized ink bleed. Thus, a border strip which is significantly less visible to the naked eye, is formed which minimizes bleed between the two secondary color regions.

Abstract: A method is described for optimizing printing a first print dot, a second print dot, a third print dot, and a fourth print dot adjacent to each other on a sheet of paper. The method first determines whether the first, second, third, and fourth print dots to be printed are in black color. If any one of the first, second, third, and fourth print dots is in the black color, then the respective one of first, second, third, and fourth print dots needs to be double printed with the black color. If the first and second print dots are in the black color and the third and fourth print dots are color print dots, then the first and second print dots are printed with the black color and the third color print dot is printed during a first print pass by the printer.

Abstract: In a printer assembly including a printhead which moves in a first direction for printing on a sheet of paper, roller means having an outer cylindrical periphery that engages the sheet of paper at successive tangent points on the periphery for moving the paper in a second perpendicular direction, and driving means for rotating the roller means, an apparatus for correcting certain pre-established errors in the positioning of the sheet of paper by the roller means is described. The apparatus comprises means for controlling the driving means such that the driving means rotates the roller means in order to move the sheet of paper in a way which eliminates the pre-established errors. An arrangement for determining certain pre-established errors in the positioning of the sheet of paper by the roller means is also described.