A fluid ejection device includes groups of firing cells, sharing a common fire signal and a common address selection mechanism, each firing cell having a drop generator for ejecting fluid and a dynamic memory addressable by the common address selection mechanism. Circuitry interfaces with the firing cells to allow the capture of data during two consecutive select cycles, then firing of all cells during a third cycle.

Fluid ejection device

An ink-jet recording head (1) is mounted on a carriage (2), recording engines (3, 3') for printing a recording sheet with ejected ink droplets are so disposed that a recording sheet can be inserted from one of different sheet feed passages (4, 4') and the ink is supplied to each recording engine (3, 3') from a common main tank (6). An ink-jet recorder has a control means (10) for comparing the amount of external print data with a reference amount of data, divides the print data into units of data of one page if the amount of print data is greater than the reference amount of data, and distributes the external print data to the recording engines. If the amount of print data is less than the reference amount of data, one recording engine is operated singly to execute printing.

Ink jet recorder

A liquid droplet jetting apparatus includes a jetting head unit which has a nozzle which jets droplets of a liquid, and a heat generating section, a suction port which is formed in the jetting head unit, and which opens near the nozzle, and a suction device which sucks air around the nozzle from the suction port, and cools down the heat generating section of the jetting head unit by the air which is sucked. Since the heat generating portion is cooled down by the air sucked from the suction port by the suction device, it is possible to reduce a possibility of the heat of the heat generating section being transferred to the jetting head unit, and destabilizing an operation of the jetting head unit. Moreover, since the suction port opens near the nozzle, it is possible to suck fine liquid droplets together with air around the nozzle.

Liquid droplet jetting apparatus

There is disclosed a liquid droplet ejecting apparatus including: a tank storing a liquid; a nozzle from which the liquid is ejected in the form of a droplet; a first pressure-feed portion which is disposed between the tank and the nozzle, and pressure-feeds the liquid as supplied from the tank, to eject the liquid droplet from the nozzle; a second pressure-feed portion which has an inner volume larger than that of the first pressure-feed portion, and is disposed between the tank and the first pressure-feed portion, the second pressure-feed portion pressure-feeding the liquid as supplied from the tank to the nozzle via the first pressure-feed portion, to eject the liquid from the nozzle in an amount larger than an amount of the liquid ejected by the first pressure-feed portion as the liquid droplet; and the second pressure-feed portion including: a pressure chamber; a pressurizing member that pressurizes the liquid in the pressure chamber by decreasing an inner volume of the pressure chamber; and a liquid communication passage which holds the tank and the nozzle in communication with each other via the pressure chamber, and which includes a flow resistance generator which is disposed in at least one of a portion of the liquid communication passage between the tank and the pressure chamber, and a portion of the liquid communication passage between the pressure chamber and the nozzle, the flow resistance generator giving a flow resistance to the liquid as flowing in the at least one of the two portions of the liquid communication passage.

Liquid-droplet ejecting apparatus

PROBLEM TO BE SOLVED: To provide an inkjet recording method capable of suppressing the lowering of recording efficiency caused by density correction of an image.SOLUTION: The inkjet recording method is executed in an inkjet recording apparatus including an ink tank 11 for storing ink, a flow path member 12 communicating with the ink tank 11, and a recording head 13 for ejecting ink droplets produced from the ink supplied from the ink tank 11 through the flow path member 12. The method includes: a light detection step which applies light to the ink in the ink tank 11 or the ink in the flow path member 12 and detects the intensity of back-scattered light of the applied light; an ink concentration calculation step which calculates an ink concentration on the basis of the intensity of the back-scattered light detected in the light detection step; and an image density correction step which corrects the density of an image to be formed with ejection of ink droplets by using the ink concentration calculated in the concentration calculation step.

Inkjet recording method and inkjet recording apparatus

PROBLEM TO BE SOLVED: To discharge a gas remaining in an ink tank connected to a recording head by a simple mechanism SOLUTION: A recording head 1 for discharging ink from a nozzle 6 thereby recording to a recording medium, and a sub tank 2 connected to the recording head 1 are loaded to a carriage 3 The sub tank 2 is connected to a main tank 4 via a feed tube 5 An excess gas remaining inside the sub tank 2 is discharged outside by a tube pump 50b from a gas discharge opening 108 set to an upper part of the sub tank 2 through a gas discharge tube 10, a joint member 11 and a main gas discharge tube 12 A float 9 is set inside the sub tank 2 The excess gas in the sub tank 2 is discharged, whereby an ink level is raised and the float 9 shuts the discharge opening 108 A discharge operation for the excess gas by the tube pump 50b is finished at this time

Ink jet recording apparatus

PROBLEM TO BE SOLVED: To provide a correction optical device that solves a problem in which: providing driving means dedicated for a lock mechanism in a correction lens center lock mechanism results in an increase in size and costs; rotating to lock a movable side member by driving means for correcting image blur results in deviation of an optical axis that has been adjusted by the rotation of correction lens, and thereby deterioration in image quality.SOLUTION: A rotating member is provided between a fixed member and a movable member that supports a correction lens, and the movable member is allowed to control the rotation of the rotating member so as to lock and release the movable member.

Correction optical device

PROBLEM TO BE SOLVED: To prevent variation of a quantity of ejected ink during recording even when using an ink tank having a large capacity for storing ink by providing a means for adjusting a height of the ink tank such that a liquid level in the ink tank is always equal to a height of an ink ejection face of a recording medium. SOLUTION: Each of ink tanks 25 (25a, 25b, 25c, 25d) is supported with each of spring bases 22 (22a, 22b, 22c, 22d) such that it is balanced with an upward elastic force of each of the respective spring bases which are independently provided. In this structure, when ink in the ink tank 25 on the spring base 22 is consumed and the weight thereof is reduced by, for example, 12g, the liquid level is lowered by 10 mm. However, as the ink tank 25 is urged upward by the spring, it is lifted by 10 mm, thereby balancing the weight with the reduction of the ink. As a result, the height of the liquid level in the ink tank 25 is maintained at a constant level. As the damper is provided thereto, it is possible to suppress the vibration of the liquid level even when a sudden change in condition, such an earthquake, occurs.

PURPOSE:To suppress the eccentric quantity of a track to the minimum, and to improve he stability of tracking by using a backing disk having a center hole whose diameter is larger than a diameter of a center hole of a recording disk. CONSTITUTION:A disk-shaped recording medium (disk) 1 is constituted by sticking a recording disk 1A and a backing disk 1B by an adhesive agent 1C. A track 1D is formed on the recording disk 1A. A diameter of a center hole of the backing disk is larger enough than a diameter of a center hole of the recording disk. Accordingly, an inclined plane of a clamp 5 contacts to the upper edge of the center hole of the recording disk 1a and a disk 1 is fixed to a turntable 4. In this way, even if an eccentricity occurs when sticking the recording disk and the backing disk, a revolving shaft of the recording disk coincides with a revolving shaft of the clamp, and the revolving shaft of the clamp can be made to coincide very well with a revolving shaft of a spindle of a spindle motor, therefore, a deflection of the track by a rotation of the motor can be minimized.

Disk-shaped recording medium

PROBLEM TO BE SOLVED: To provide a correction optical device, an image blur correction device, and an imaging apparatus which can be reduced in size and cost and reduced in power consumption.SOLUTION: The correction optical device comprises: a fixed member; a rotation member; a movable member; first and second driving devices; and at least first and second contact members. When regulating the movement of the movable member, a rotational driving force is generated by the first and second driving devices, the movable member is rotated until it comes into contact with a first contact member and then, the rotation member is rotated in a direction opposite to the rotational direction of the movable member, to regulate the translational movement of the movable member. When correcting an image blur, the rotational driving force in the direction opposite to the rotational force is generated, the movable member is rotated until it comes into contact with a second contact member and then, the rotation member is rotated in the direction opposite to the rotational direction of the movable member, to release the regulation of the movable member.

Yomo Makoto

Papers

Ink jet recording apparatus

Correction optical device

Ink jet recorder

Disk-shaped recording medium

Correction optical device, image blur correction device, and imaging apparatus