摘要:
A liquid discharge head comprises a separation member for separating the discharge liquid flow paths communicated with discharge ports for discharging discharge liquid to enable discharge liquid to flow, and the bubbling liquid flow paths to enable bubbling liquid to flow, which is provided with the bubble generating areas for creating bubbles used for discharging discharge liquid from the discharge ports. This separation member is provided with the opening portions positioned to face the bubble generating areas, and displacement members provided for the separation member corresponding to the openings, having the free ends to be displaced by bubbles created on the bubble generating areas provided for the separation member. Then, with no bubbles created on the bubble generating areas, the displacement members interrupt the opening portions, and with bubbles created thereon, the free ends of the displacement members are displaced to discharge discharge liquid from the discharge ports of the head. Hence, this head can prevent discharge liquid from entering around the heat generating members at the time of bubble disappearance, and the mixture of discharge liquid and bubbling liquid when the head is left intact for a long time, while maintaining the excellent discharge efficiency by means of the displacement members thus arranged.
摘要:
A method for the discharge of a liquid and a liquid discharge head are provided which produce stable discharge of the liquid and, at the same time, facilitate the supply of the liquid by repressing the oscillation of a movable separation membrane during the extinction of bubbles. The method comprises using a movable separation membrane for separating a first flow path communicating with a discharge port for discharging the liquid and a second flow path furnished with a bubble generating region for generating bubbles in the liquid by the use of a heating element, disposing a movable member opposed to the bubble generating region across the movable separation membrane and furnished with a free terminal in the direction of liquid discharge, causing separation between the movable separation membrane and the movable member during the contraction of the bubbles, and inducing the intrusion of the liquid therebetween.
摘要:
A liquid discharge head is provided which allows production of a recorded image of improved quality by controlling the speed of flow of a liquid and the distribution of the speed of flow in a flow path caused in consequence of contraction of bubbles thereby stabilizing the direction of satellites arising behind main drops of discharged liquid and, at the same time, decreasing the amount itself of the satellites. This liquid discharge head comprises a movable separation membrane capable of effecting separation between a first flow path communicating with a discharge port for discharging a liquid and a second flow path furnished with a bubble generating region for generating bubbles in the liquid by means of a heating element and a movable member opposed to the bubble generating region across the movable separation membrane and furnished in the direction of liquid discharge with a free end to guide the displacement of the movable separation membrane induced by the growth of the bubbles in the direction of the discharge port and regulate the shape of displacement of the movable separation membrane as well.
摘要:
A liquid discharge method for discharging a liquid through a discharge port for discharging the liquid utilizing a bubble by displacing a movable separation film for always substantially separating a first liquid flow path in communication with said discharge port for discharging the liquid from a second liquid flow path comprising a bubble-generating region for generating the bubble in said liquid, on the upstream side of said discharge port with respect to flow of the liquid in said first liquid flow path, comprises a step of displacing a downstream portion of said movable separation film toward said discharge port relatively more than an upstream portion of said movable separation film with respect to a direction of the flow of the liquid.
摘要:
A liquid discharge method for discharging a liquid through a discharge port for discharging the liquid utilizing a bubble by displacing a movable separation film for always substantially separating a first liquid flow path in communication with said discharge port for discharging the liquid from a second liquid flow path comprising a bubble-generating region for generating the bubble in said liquid, on the upstream side of said discharge port with respect to flow of the liquid in said first liquid flow path, comprises a step of displacing a downstream portion of said movable separation film toward said discharge port relatively more than an upstream portion of said movable separation film with respect to a direction of the flow of the liquid.
摘要:
A liquid discharge head comprises discharge ports for discharging the liquid, a bubble producing area for producing an air bubble in the liquid of liquid flow channels, and a movable member, which is disposed toward the bubble producing area, and displaceable between a first position and a second position farther away from the bubble producing area than the first position, the liquid discharge head discharging the liquid in such a manner that the movable member is displaced from the first position to the second position by a pressure due to a bubble produced in the bubble producing area, and the bubble is more greatly expanded downstream than upstream in a direction toward the discharge port, due to the displacement of the movable member. The head has a check valve disposed in a liquid supply passage leading to the liquid flow channels.
摘要:
A liquid carrying method is to carry liquid by pressure exerted by the creation of air bubble, which comprises the step of using an apparatus provided with a first liquid flow path for enabling the carrying liquid to flow, a second liquid flow path provided with the air bubble generating area for creating air bubble, a heat generating device arranged for the air bubble generating area to generate heat for the creation of the air bubble and a movable separation film for separating the first liquid flow path and the second liquid flow path and the step of carrying liquid in the first liquid flow path by displacing the movable separation film, having direction regulating means for regulating the displacement direction of the movable separation film, to the first liquid flow path side by the pressure exerted by the creation of the air bubble. With the method thus structured, it becomes possible to carry liquid efficiently and discharge it from each of the discharge openings stably with high discharge force in good discharge efficiency.
摘要:
A liquid discharging head comprises a discharging port for discharging liquid, a liquid flow path communicated with said discharging port, a bubble generating region for causing the liquid to generate a bubble and a movable member having provided thereon a free end disposed facing to said bubble generating region, and on the downstream of said liquid flow path directed toward said discharging port. At least when said movable member is in stationary state, a side of said liquid flow path corresponding to said bubble generating region is substantially composed of all with a wall face and common communicating space for commonly communicating said liquid flow path with a neighboring liquid flow path is provided in the upward of a movable section of said movable member.
摘要:
A liquid discharging method for discharging liquid, which uses the pressure exerted at the time of creating each of bubbles in liquid in a bubble generating area, is arranged to provide two bubble generating areas for generating bubbles in such a manner as to enable these areas to face each other at least partly, hence discharging liquid by means for the pressure thus exerted in the bubble generating areas. In this way, it becomes possible to increase the amount of liquid discharged, as well as to enhance the durability of the movable members, while stabilizing the discharge of liquid from each of the discharge openings.
摘要:
A liquid discharging head includes a discharge port for discharging liquid, a liquid passage communicated with the discharge port, a bubble generating area for generating a bubble in the liquid in the liquid passage, the bubble generating area including a heater for heating the liquid in the liquid passage, and a movable member disposed in a confronting relation to the bubble generating area in the liquid passage and adapted to be shifted by pressure caused by generating the bubble at the bubble generating area to direct the pressure toward the discharge port and to be returned to its initial position by negative pressure due to contraction of the bubble, and wherein resistance of the movable member against the liquid in the liquid passage when it is shifted is smaller than that when it is returned.