Narrow multi-color ink jet printhead

B - Operations – Transporting – 41 – J

Patent

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B41J 2/14 (2006.01) B41J 2/21 (2006.01)

Patent

CA 2416596

A narrow ink jet printhead (100) having three columnar arrays (61) of ink drop generators (40) configured for multi-pass color printing at a print resolution having a media axis dot spacing that is less than the columnar nozzle spacing of the ink drop generators. The ink jet printhead more particularly includes high resistance heater resistors (56) and efficient FET drive circuits (85) that are configured to compensate for variation in parasitic resistance presented by power traces (86a, 86b, 86c, 86d, 181).

L'invention concerne une tête d'impression à jet d'encre (100) étroite comportant trois ensembles (61) en colonnes de générateurs (40) de gouttelettes d'encre conçus pour effectuer une impression couleur multipasse à une résolution d'impression présentant un espacement de points selon un axe médian inférieur à l'espacement des buses en colonnes des générateurs de gouttelettes d'encre. La tête d'impression à jet d'encre comprend plus particulièrement des éléments résistants chauffants (56) à résistance élevée et des circuits d'attaque à transistors à effet de champ (FET) (85) efficaces, conçus pour compenser une variation de résistance parasite induite par des tracés électriques (86a, 86b, 86c, 86d, 181).

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