Abstract:
A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit.
Abstract:
The present invention provides a liquid discharging head comprising a discharge port for discharging liquid, a bubble generating area (11) for generating a bubble in the liquid, a movable member (31) disposed in a confronting relation to the bubble generating area and displaceable between a first position and a second position more spaced apart from the bubble generating area than the first position, and side members integrally formed with at least parts of the movable member on its both sides and shiftable together with the movable member and adapted to cover sides of a bubble generated, and wherein the movable member is shifted from the first position to the second position by pressure due to generation of the bubble in the bubble generating area, and the bubble is more expanded downstream than upstream of a direction toward the discharge port by the displacement of the movable member. The present invention further provides a head cartridge having such a liquid discharging head and a liquid discharging apparatus having such a liquid discharging head.
Abstract:
An ink tank (10) has an ink container (11) storing the ink to be used in the printing apparatus (102), a waste ink container (13) storing the ink used in the printing apparatus, an atmosphere communication hole (36) provided in the waste ink container(13), and a coupling member (18, 19) provided on one of or both of the ink container (11) and the waste ink container (13) and provided for coupling the ink container (11) and the waste ink container (13), and forming an ink guide path (46) for guiding the ink flown from the atmosphere communication hole (36) to a predetermined position of the ink container (11) or the waste ink container (13). An elastic body (16) has a domed shape, and is used at a coupling portion (20A, 20B, 20C) in one of or both of the ink container (11) and the waste ink container (13), the coupling portion (20A, 20B, 20C) for coupling the containers (11, 13) to the printing apparatus (102).
Abstract:
A liquid ejection method includes preparing a head comprising an ejection outlet (18) for ejecting the liquid, a bubble generation region for generating the bubble in the liquid, a movable member (31) disposed faced to the bubble generation region (11) and displaceable between a first position and a second position further from the bubble generation region (11) than the first position; displacing the movable member (31) from the first position to the second position by pressure produced by the generation of the bubble in the bubble generating portion (11) to permit expansion of the bubble more in a downstream side closer to the ejection outlet (18) than in an upstream side; supplying, to a heat generating element (2) for applying thermal energy to the bubble generating region (11), a driving pulse divided into a first pulse and an adjacent second pulse with interval time therebetween; pre-heating the liquid by the first pulse to an extent not enough to eject the liquid through the ejection outlet; generating a bubble by heating the liquid by the second pulse to eject the liquid through the ejection outlet (18); controlling a degree of pre-heating of the liquid by changing at least one of a pulse width of the first pulse or the interval time.
Abstract:
A liquid jet recording apparatus is structured to enable recording liquid to circulate by conductively connecting the recording head (13) for discharging recording liquid and means for retaining recording liquid through a forwarding path (30) for recording liquid to flow into the head and a returning path (31) for recording liquid to flow out from the head. This apparatus comprises means (11,9) for generating pressure to suck recording liquid on the returning path (31) from the head (13), while exerting pressure on recording liquid in the forwarding path (30) toward the head (13). In this way, dust particles and air bubbles in ink are removed without allowing ink to flow out of the discharge ports (15) of the recording head so as to save the consumption of ink to be used wastefully when a recovery operation is executed for the apparatus.
Abstract:
An ink jet recording method for recording by use of an ink jet head, which is provided with a plurality of elemental substrates having a plurality of discharge energy generating elements arranged in line, the substrates being arranged in the direction of such line, comprises the step of selecting adjacent discharge energy generating elements between adjacent elemental substrates to be ready for driving simultaneously or continuously, or the step of shifting the position to start the driving cycle for the discharge energy generating elements from the respective seamed portions between the elemental substrates, hence reducing the unevenness of prints brought about on the seamed portions between elemental substrates.
Abstract:
An ink tank (10) has an ink container (11) storing the ink to be used in the printing apparatus (102), a waste ink container (13) storing the ink used in the printing apparatus, an atmosphere communication hole (36) provided in the waste ink container(13), and a coupling member (18, 19) provided on one of or both of the ink container (11) and the waste ink container (13) and provided for coupling the ink container (11) and the waste ink container (13), and forming an ink guide path (46) for guiding the ink flown from the atmosphere communication hole (36) to a predetermined position of the ink container (11) or the waste ink container (13). An elastic body (16) has a domed shape, and is used at a coupling portion (20A, 20B, 20C) in one of or both of the ink container (11) and the waste ink container (13), the coupling portion (20A, 20B, 20C) for coupling the containers (11, 13) to the printing apparatus (102).
Abstract:
An ink jet recording method for recording by use of an ink jet head, which is provided with a plurality of elemental substrates having a plurality of discharge energy generating elements arranged in line, the substrates being arranged in the direction of such line, comprises the step of selecting adjacent discharge energy generating elements between adjacent elemental substrates to be ready for driving simultaneously or continuously, or the step of shifting the position to start the driving cycle for the discharge energy generating elements from the respective seamed portions between the elemental substrates, hence reducing the unevenness of prints brought about on the seamed portions between elemental substrates.
Abstract:
The present invention provides a liquid discharging head comprising a discharge port for discharging liquid, a bubble generating area for generating a bubble in the liquid, a movable member disposed in a confronting relation to the bubble generating area and displaceable between a first position and a second position more spaced apart from the bubble generating area than the first position, and side members integrally formed with at least parts of the movable member on its both sides and shiftable together with the movable member and adapted to cover sides of a bubble generated, and wherein the movable member is shifted from the first position to the second position by pressure due to generation of the bubble in the bubble generating area, and the bubble is more expanded downstream than upstream of a direction toward the discharge port by the displacement of the movable member. The present invention further provides a head cartridge having such a liquid discharging head and a liquid discharging apparatus having such a liquid discharging head.