Methods and apparatuses for use in inkjet pens

Details Methods and apparatuses for use in inkjet pens Methods and apparatuses for use in inkjet pens

B - Operations, Transporting

41

J

B41J 2/175 (2006.01)

Patent

CA 2605911

Methods and apparatuses are provided for use in inkjet pens (200, 300, 400). One method includes, during an initial stage of pen life (604), drawing ink (108) from an ink reservoir (106) though a standpipe (100), and, during an extended stage of pen life (606), allowing external air (204) to enter into the standpipe (110) through a standpipe bubbler (202,404) and drawing ink from within the standpipe (110) and, if at all, only insubstantially from the ink reservoir (106).

La présente invention concerne des procédés et des dispositifs utilisés dans les têtes d~impression (200, 300, 400). L~un des procédés comprend, pendant une phase initiale de la vie d'une tête d'impression (604), l'aspiration d'encre (108) depuis un réservoir d'encre (106) au moyen d'une colonne de pression (100) et, pendant une phase étendue de la vie d'une tête d'impression (606), l'entrée contrôlée d'air extérieur (204) dans la colonne de pression (110) au moyen d'un tube à bulles de la colonne de pression (202, 204) et l~aspiration d~encre depuis l~intérieur de la colonne de pression (110) et seulement insensiblement, voire pas du tout, depuis le réservoir d'encre (106).

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