摘要:
A substrate for a liquid jet recording head includes a plurality of built-in energy elements forming an array for generating thermal energy for ejecting liquid, built-in electrode wiring for supplying electric signals to the energy generating elements and first and second built-in temperature sensors disposed outside the array and adjacent opposite ends of the array for detecting a temperature of the substrate. First and second built-in heaters are disposed outside the array and adjacent opposite ends of the array for heating the substrate.
摘要:
An inkjet recording apparatus efficiently recovers defective discharge while reducing the amount of waste ink, acquires position information of a defective discharge nozzle and, based on the position information, determines whether the defective discharge has been caused by a bubble or a dust particle, and selects an ink circulation mode or a wiping mode.
摘要:
Disclosed herein is a printing medium comprising a cloth and having a Clark stiffness not lower than 10, but not higher than 400 at least at its ends.
摘要:
An ink jet apparatus, used with an exchangeable ink jet cartridge having an ink jet head and an ink container, includes a cap, a sucking device and a controller. When the cap caps the ejection orifices of the recording head, the sucking device sucks ink from the ejection orifices. The controller controls the operation of the cap and sucking device. After a sucking operation is performed, the cap is held away from the ejection orifices for a predetermined duration of time; the capping and sucking operations are then repeated.
摘要:
An ink jet recording apparatus includes a liquid passage for ejection of ink; a liquid chamber for supplying ink to the passage; a device for mounting the recording head on the ink jet recording apparatus at an angle not more than 45 degrees relative to the horizontal plane; wherein the chamber has an internal surface which is slanted in a direction from an ink inlet thereof toward the liquid passage at the angle of 5-40 degrees relative to an extension of the liquid passage.
摘要:
An ink jet apparatus using an ink jet head having a heat generating element for generating thermal energy to be used to discharge ink, comprises a unit for deriving an amount .increment.Q.sub.i indicative of a heat amount stored in i (i.gtoreq.1) portions of said ink jet head sectioned by thermal time constants, corresponding to a heat amount applied to said ink jet head at a predetermined time interval .increment.t, a unit for multiplying an amount .increment.T.sub.i (n-1) indicative of the heat amount stored in the i-sectioned portion of the predetermined time interval .increment.t earlier by a predetermined constant E.sub.i corresponding to the sectioned thermal time constant, a unit for adding the amount .increment.Q.sub.i to the product, a unit for storing the sum as the amount .increment.T.sub.i (n) indicative of the heat amount stored in the i-sectioned portion, a unit for summing all amounts .increment.T.sub.1 (n) to determine an amount .increment.T corresponding to the heat amount stored in said ink jet head and a unit for controlling said ink jet head in accordance with the amount .increment.T.
摘要:
An ink container, as well as a method of making the same, which has ink absorbing material for retaining ink, a casing for holding the ink absorbing material, an ink supply port through which ink is withdrawn from the absorbing material, and an air vent. The air vent and ink supply port are each provided adjacent to different longitudinal halves of the ink absorbing material, and the casing is initially filled with an amount of ink which is larger than the quantity of ink which can be retained by the ink absorbing material. Then, ink adjacent to the air vent is removed to such an extent that the casing contains the quantity of the ink which the ink absorbing material can retain. Thus, ink is retained at a higher density adjacent to the ink supply port than adjacent to the air vent.
摘要:
A liquid jet head includes a heat generating element for producing a bubble to eject liquid from the head, a heat acting zone in which heat generated by the heat generating element produces a bubble in the liquid, a liquid supply passage adjacent the heat acting zone and having a liquid supply opening, with a center, for supplying liquid to the heat acting zone, and a liquid ejection passage adjacent the heat acting zone and having an orifice, with a center, through which the liquid is ejected, the liquid ejection passage including a diverging portion extending in a direction from the heat acting zone toward the orifice. A first plane that includes a first center line passing through the center of the orifice and along a direction of liquid ejection through the orifice, and a second plane that includes a second center line passing through the center of the liquid supply opening and along a direction of the supply of liquid from the liquid supply passage to the heat acting zone, cross in the diverging portion of the liquid ejection passage. At least a portion of the liquid supply passage and at least a portion of the diverging portion have a common, collinear surface substantially parallel to the second center line.
摘要:
A recording apparatus has: a recording head having a liquid chamber and nozzles; a tank that stores the liquid which is supplied to the recording head; a liquid supply path that supplies the liquid from the tank to the liquid chamber; a supply pump provided on the liquid supply path; a liquid return path that returns the liquid from the liquid chamber to the tank; a return pump provided on the liquid return path; and a control unit that controls the supply pump and the return pump, wherein when the liquid is initially filled into the liquid chamber, the control unit drives the return pump so as to set the liquid chamber into a negative pressure state and subsequently drives the supply pump. The recording apparatus which can fill the liquid at a high speed without raising a pressure of a flow path can be provided.
摘要:
During a cleaning operation, the following steps are executed. The steps includes a first step of pressurizing ink in a supply path to overflow the ink from a nozzle, a second step of stopping the pressurization, a third step of executing wiping while the pressurization is stopped and a negative pressure is not applied, and a fourth step of applying a negative pressure to the ink at the nozzle to generate a meniscus.