Liquid discharge method and liquid jet apparatus

B - Operations – Transporting – 41 – J

Patent

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Details

B41J 2/05 (2006.01) B41J 2/14 (2006.01) B41J 2/145 (2006.01) B41J 2/21 (2006.01)

Patent

CA 2243913

A liquid discharge method is designed for a liquid jet head provided with first discharge openings, a first liquid flow path conductively connected with each of the first discharge openings, first energy generating devices for generating energy for the discharge of droplets from the first discharge openings, second discharge openings, a second liquid flow path conductively connected with each of the second discharge openings, and second energy generating devices for generating energy for the discharge of droplets from the second discharge openings. Then, preceding the discharge of the first droplet from the discharge opening at a first discharge speed V1, the second droplet is discharged from the second discharge opening at a second discharge speed v2 smaller than the first discharge speed, and before each of the liquid droplets being impacted on an object, the first liquid droplet and the second liquid droplet are allowed to collide with each other to be combined. In this way, it becomes possible to allow two droplets to be in contact or to collide with each other reliably to be mixed between the liquid jet head and the object within a range that does not render any hinderance practically even if discharge speeds may fluctuate, hence obtaining precise images in higher quality.

Cette invention concerne une méthode de décharge de liquide par une tête d'imprimante à jet comportant un premier orifice de décharge, un premier trajet d'écoulement menant à celui-ci, un premier générateur d'énergie de décharge de gouttelette par celui-ci, un second orifice de décharge, un second trajet d'écoulement menant à celui-ci et un second générateur d'énergie de décharge de gouttelette par celui-ci. Avant la décharge de la première gouttelette par le premier orifice de décharge à une première vitesse de décharge V1, la seconde gouttelette est expulsée du second orifice de décharge à une vitesse de décharge V2 inférieure à la vitesse de décharge de la première gouttelette. Avant que les deux gouttelettes ne frappent le support d'impression, elles sont amenées à se heurter pour se combiner. Ainsi, les deux gouttelettes se fondent en une seule entre la tête d'imprimante et le support d'impression sur une distance telle qu'il n'y aucun risque de dispersion même si les vitesses de décharge fluctuent, ce qui donne des images nettes de qualité supérieure.

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