Abstract: Examples relating to calibrating printing pens of a print bead assembly in a printer are described. For example, techniques for calibrating a printing pen includes detecting position of a first symbol and a second symbol of a pattern from amongst multiple patterns in an alignment pattern, where each pattern is associated with art ideal deviation and the symbols are printed in a juxtaposed position. The ideal deviation is a predefined value of deviation between the symbols when the printing pen is aligned. Thereafter, determining an actual deviation, due to misalignment in the printing pen, between the symbols. Further the technique includes establishing a relation between the actual deviation and the ideal deviation for the multiple patterns and determining a value of the ideal deviation for a zero value of the actual deviation. The value of the ideal deviation is a corrective value of alignment for the printing pen.

Abstract: Examples relating to calibrating printing pens of a print bead assembly in a printer are described. For example, techniques for calibrating a printing pen includes detecting position of a first symbol and a second symbol of a pattern from amongst multiple patterns in an alignment pattern, where each pattern is associated with art ideal deviation and the symbols are printed in a juxtaposed position. The ideal deviation is a predefined value of deviation between the symbols when the printing pen is aligned. Thereafter, determining an actual deviation, due to misalignment in the printing pen, between the symbols. Further the technique includes establishing a relation between the actual deviation and the ideal deviation for the multiple patterns and determining a value of the ideal deviation for a zero value of the actual deviation. The value of the ideal deviation is a corrective value of alignment for the printing pen.

Abstract: In an embodiment, a processor-readable medium stores code representing instructions that when executed by a processor cause the processor to separate image data into dark color data and light color data, and correlate the dark color data with a first printing direction and the light color data with a second printing direction, where the first and second printing directions are opposite one another. The instructions further cause the processor to print the dark color data in the first printing direction and the light color data in the second printing direction.

Abstract: In an embodiment, a processor-readable medium stores code representing instructions that when executed by a processor cause the processor to separate image data into dark color data and light color data, and correlate the dark color data with a first printing direction and the light color data with a second printing direction, where the first and second printing directions are opposite one another. The instructions further cause the processor to print the dark color data in the first printing direction and the light color data in the second printing direction.

Abstract: A printing apparatus with capability for drying printed media is disclosed. The printing apparatus includes a print zone and a post-printing zone, an advancing mechanism for transporting the print medium through the print zone, a print head for ejecting ink onto the medium as the medium is being transported through the print zone, and a heating system for drying the ink ejected onto the medium. The heating system includes a plurality of thermoelectric modules positioned in the print zone or the post-printing zone. Each thermoelectric module has a heat-rejecting surface and a cooling surface. The heat-rejecting surface of each thermoelectric module is positioned to face the medium being transported.