Printhead with matched resonant damping structure

B - Operations – Transporting – 41 – J

Patent

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Details

B41J 2/175 (2006.01) B41J 2/055 (2006.01)

Patent

CA 2706555

A printhead that has at least one printhead integrated circuit (IC) with an array of nozzles for ejecting ink and a support structure for supporting the printhead IC. The support structure has an ink conduit for supplying the array of nozzles with ink. The conduit has a set of resonant frequencies at which ink in the conduit generates a standing wave in response to certain operating modes of the array of nozzle. A fluidic damper is incorporated into printhead, the damper having a selected resonant frequency that damps the standing waves associated with each of the set of resonant frequencies such that they have an amplitude less than a maximum threshold.

L'invention porte sur une tête d'impression qui comporte au moins un circuit intégré de tête d'impression avec un réseau de buses pour éjecter de l'encre et une structure de support pour supporter le circuit intégré de la tête d'impression. La structure de support comporte un conduit d'encre pour alimenter en encre le réseau de buses. Le conduit a un ensemble de fréquences de résonance auxquelles l'encre dans le conduit génère une onde stationnaire en réponse à certains modes de fonctionnement du réseau de buses. Un amortisseur à fluide est incorporé dans la tête d'impression, l'amortisseur ayant une fréquence de résonance sélectionnée qui amortit les ondes stationnaires associées à chacune de l'ensemble des fréquences de résonance, de telle sorte qu'elles ont une amplitude inférieure à un seuil maximal.

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