摘要:
A liquid discharging method for a liquid head discharge head, which is provided with a plurality of discharge ports for discharging liquid, a plurality of liquid flow paths communicated always with each of the discharge ports at one end, each having bubble generating area for creating bubble in liquid, bubble generating means for generating energy to create and grow the bubble, a plurality of liquid supply ports each arranged for each of the liquid flow paths to be communicated with common liquid supply chamber, and movable member supported with minute gap to the liquid supply port on the liquid flow path side, and provided with free end, the area of the movable member surrounded at least by the free end portion and both sides continued therefrom being made larger than the opening area of the liquid supply port facing the liquid flow path, comprises the step of setting a period for the movable member to close and essentially cut off the opening area during the period from the application of driving voltage to the bubble generating means to the substantial termination of isotropical growth of the entire bubble by the bubble generating means, hence making it possible to enhance the suppressing efficiency of the bubble growing component in the direction opposite to the discharge port, and the refilling characteristics of liquid simultaneously.
摘要:
A liquid discharging method for a liquid head discharge head, which is provided with a plurality of discharge ports for discharging liquid, a plurality of liquid flow paths communicated always with each of the discharge ports at one end, each having bubble generating area for creating bubble in liquid, bubble generating means for generating energy to create and grow the bubble, a plurality of liquid supply ports each arranged for each of the liquid flow paths to be communicated with common liquid supply chamber, and movable member supported with minute gap to the liquid supply port on the liquid flow path side, and provided with free end, the area of the movable member surrounded at least by the free end portion and both sides continued therefrom being made larger than the opening area of the liquid supply port facing the liquid flow path, comprises the step of setting a period for the movable member to close and essentially cut off the opening area during the period from the application of driving voltage to the bubble generating means to the substantial termination of isotropical growth of the entire bubble by the bubble generating means, hence making it possible to enhance the suppressing efficiency of the bubble growing component in the direction opposite to the discharge port, and the refilling characteristics of liquid simultaneously.
摘要:
There is disclosed a liquid discharge head comprising: a plurality of discharge ports for discharging a liquid; a plurality of liquid flow paths whose one end portion always communicates with each of the discharge ports and which comprise a bubble generating area for generating a bubble in the liquid; bubble generating means for generating an energy to generate and grow the bubble; a plurality of liquid supply ports, disposed in the liquid flow paths, for communicating with a common liquid supply chamber; and a movable member having a free end supported at a slight gap with respect to the liquid flow path of the liquid supply port, so that recording of a high quality level image is achieved at a high speed. When a volume of a liquid droplet discharged from the discharge port is Vd, and during discharge of the liquid from the discharge port, a drawing volume from the discharge port to a liquid surface retracted to maximum into the liquid flow path is Vm, a relation of Vd>Vm is established. Therefore, meniscus returns fast, and a refill frequency can be enhanced.
摘要:
There is disclosed a liquid discharge head comprises a discharge port for discharging a liquid, a liquid flow path with one end constantly communicating with the discharge port and with a bubble generating area for generating a bubble in the liquid, a liquid supply port disposed in the liquid flow path and connected to a common liquid supply chamber for storing the liquid to be supplied to the liquid flow path, a plurality of bubble generating means, disposed in the liquid flow path, for generating the bubble in the liquid, and a plate-like movable member disposed in the liquid flow path with the side of the discharge port supported as a free end at a gap of 10 &mgr;m or less with respect to the liquid supply port on the side of the liquid flow path, and provided with a projection area larger than an opening area of the liquid supply port. The discharge port is in a linear communication state with the bubble generating means, and by driving the bubble generating means for generating the bubble with a smallest volume among the plurality of bubble generating means, the movable member seals and substantially shuts off the liquid supply port, which can increase a discharge amount ratio of liquid droplets, equalize liquid droplet discharge speeds, and raise a refill frequency after discharge.
摘要:
A liquid discharging method for a liquid discharge head having a plurality of discharge ports and a plurality of liquid flow paths communicated always with each of the discharge ports at one end, each having a bubble generating area, a bubble generating unit, a plurality of liquid supply ports, and a movable member supported with a minute gap to the liquid supply port on the liquid flow path side, and provided with a free end. The area of the movable member is surrounded at least by the free end portion and both sides continued therefrom are made larger than the opening area of the liquid supply port facing the liquid flow path. A period for the movable member is set to close and essentially cut off the opening area during the period from the application of the driving voltage to the bubble generating unit.
摘要:
A liquid discharging method for a liquid head discharge head. The head has discharge ports, liquid flow paths, bubble generating areas, bubble generating means, liquid supply ports connecting the flow paths with a common liquid supply chamber, and a movable member in the flow paths supported with a minute gap to the supply ports. The area of the movable member surrounded at least by its free end and both sides continued therefrom is larger than the opening area of the supply ports. The method includes the step of setting a period for the movable member to substantially close the opening area during the period from the application of a driving voltage to the bubble generating means to the substantial termination of isotropical growth of the entire bubble by the bubble generating means. Growth of the bubble component in the direction opposite the discharge port can be suppressed, improving liquid refill.
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 ejecting head for ejecting liquid by generation of bubble includes an ejection outlet for ejecting the liquid; a liquid path in fluid communication with the ejection outlet; a bubble generation region for generating the bubble in the liquid; a movable member having a fulcrum and a free end and disposed faced to the bubble generation region; wherein the movable member moves from the first position to the second position by pressure produced by the generation of the bubble, and a resistance against movement of the movable member, is smaller adjacent the free end than adjacent the fulcrum.
摘要:
A liquid ejecting method for ejecting liquid by generation of a bubble includes preparing a head comprising an ejection outlet for ejecting the liquid, a bubble generation region for generating the bubble in the liquid, a movable member disposed faced to the bubble generation region and displaceable between a first position and a second position further from the bubble generation region than the first position; and displacing the movable member from the first position to the second position by pressure produced by the generation of the bubble in the bubble generating portion to permit expansion of the bubble more in a downstream side nearer to the ejection outlet than in an upstream side.
摘要:
A liquid ejecting head for ejecting liquid by generation of bubble includes an ejection outlet for ejecting the liquid; a liquid path in fluid communication with the ejection outlet; a bubble generation region for generating the bubble in the liquid; a movable member having a fulcrum and a free end and disposed faced to the bubble generation region; wherein the movable member moves from the first position to the second position by pressure produced by the generation of the bubble, and a resistance against movement of the movable member, is smaller adjacent the free end than adjacent the fulcrum.