Abstract: A recording apparatus uses a liquid recording head for effecting recording by ejecting liquid through ejection outlets corresponding to heat generation elements provided in the recording head. The recording head has a heating device for heating the recording head. A controller will select a heat generating element from among the heat generating elements to correct a temperature distribution of the recording head resulting from the heating by the heating device such that the heat generating element generates heat to such an extent that liquid for recording is not ejected through the ejection outlet during the temperature correction.

Abstract: A battery pack to be externally attached to a system body of a portable computer contains a plurality of batteries in two rows. A groove is formed on that portion of the top of the battery pack which correspond to the region between the rows of batteries. A hinge unit for swingably supporting a display unit is provided on the rear end of the system body of the computer in a manner such that it is partially housed in the groove of the battery pack. With this arrangement, the computer is reduced in thickness. The battery pack, which is connected to the rear end of the system body, is rotatable relatively to the system body. During use of the computer, therefore, a keyboard can be slightly declined toward a user by rotating the battery pack to raise the rear end of the system body.

Abstract: A recording apparatus and method of controlling the apparatus includes a recording head for ejecting liquid ink for recording by heat energization, a temperature change rate detecting device for detecting the temperature change rate of the recording head in a normal state, a storage device for storing the temperature change rate information, a determining device for determining the average ejection duty cycle from recording data, an obtaining device for obtaining information relating the temperature change rate in the normal state to the average ejection duty cycle, and a discriminating device for discriminating an abnormality of the recording head determined by the information relating the temperature change rate in the normal state to the average ejection duty cycle, and the temperature change rate detected by the temperature change rate detecting device.

Abstract: A substrate having plural recording elements and electrical leads for supplying electric signals to the recording elements includes electrical contacts for external electrical connection for reception of image signals used for driving the recording elements; and a processing circuit for converting signals which are serially supplied to the connecting contact to parallel signals to be applied to the recording elements.

Abstract: A substrate for liquid ejection includes a built-in energy generating element for generating thermal energy, a built-in electrode wiring portion for supplying an electric signal to the energy generating element, and a built-in temperature detecting element for detecting a temperature of the substrate.

Abstract: A substrate having plural recording elements and electrical leads for supplying electric signals to the recording elements includes electrical contacts for external electrical connection for reception of image signals used for driving the recording elements; and a processing circuit for converting signals which are serially supplied to the connecting contact to parallel signals to be applied to the recording elements.

Abstract: An ink container includes a casing, an air vent which is located in the casing, an ink supply opening for supplying ink out of the casing, and an ink absorbing material that is contained in the casing. The ink absorbing material retains ink therein, and has a generally rectangular parallelopipedal shape defined by sides of the ink absorbing material, and also has an ink supply portion for supplying ink to the ink supply opening. The ink absorbing material includes corner portions which are located between adjacent sides of the ink absorbing material. A preventing means prevents complete surface contact between the casing and said ink absorbing material by providing spaces between the casing and ink absorbing material which are in fluid communication with each other with a given space that is adjacent to a particular one of the corner portions that is most remote from the ink supply portion. The air vent is in fluid communication with the spaces.

Abstract: A substrate for liquid ejection includes a built-in energy generating element for generating thermal energy, a built-in electrode wiring portion for supplying an electric signal to the energy generating element, and a built-in temperature detecting element for detecting a temperature of the substrate.

Abstract: The present invention involves recording apparatus having such a recording head that records using thermal energy. The recording head has a substrate which includes plural thermal energy generating elements for generating thermal energy, plural wiring lines electrically connected with associated said thermal energy generating elements, and a temperature detecting element built in the substrate. This temperature detecting element is either a diode or a transistor.

Abstract: An ink jet recording head of high printing quality including a plurality of electro-thermal transducers arranged on a substrate corresponding to respective nozzles, wherein each protective layer placed on a resistor constituting each of the plurality of electro-thermal transducers has a thickness-reduced portion at a part thereof so as to increase the distance between the center point of the air bubble of each of the plurality of electro-thermal transducers to longer than the distance between the centers of gravity of each of the plurality of electro-thermal transducers. With the ink jet recording head, the relationship between the amount and the speed of ejected ink droplets can be optimized in accordance with the size of areas of the electro-thermal transducers.

Abstract: An ink jet head includes a first member with an energy generating element for generating energy to eject ink, a second member having an ejection outlet forming member provided with an ink ejection outlet through which the ink is ejected, the second member being affixed to the first member to form a liquid passage in fluid communication with the ejection outlet, and urging means for urging the first and second members together to substantially fix them against each other. The ejection outlet forming member has a jaw connected with a surface of the first member which has the energy generating element, the jaw being adjacent a first member side of the ejection outlet. The following relationships are satisfied, namely, b.gtoreq.5 microns, c.gtoreq.

Abstract: 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.

Abstract: A recording head is equipped with a plurality of liquid discharge portions, each having a discharge opening for discharging ink, and a substrate. The substrate is provided with a plurality of electrothermal transducers for generating thermal energy to be utilized for discharging the ink supplied to the liquid discharging portions and a plurality of functional devices connected electrically to the electrothermal transducers. The plurality of functional devices are arranged in a direction diagonal relative to an arrangement direction of the plurality of electrothermal transducers within a region provided with a wiring portion and have different characteristic curves of saturated voltage versus temperature corresponding to the distance from the electrothermal transducers. The region includes common electrode wiring and selective electrode wiring for the plurality of electrothermal transducers and the plurality of functional devices.

Abstract: A battery pack to be externally attached to a system body of a portable computer contains a plurality of batteries in two-rows. A groove is formed on that portion of the top of the battery pack which correspond to the region between the rows of batteries. A hinge unit for swingably supporting a display unit is provided on the rear end of the system body of the computer in a manner such that it is partially housed in the groove of the battery pack. With this arrangement, the computer is reduced in thickness. The battery pack, which is connected to the rear end of the system body, is rotatable relatively to the system body. During use of the computer, therefore, a keyboard can be slightly declined toward a user by rotating the battery pack to raise the rear end of the system body.

Abstract: The object of the present invention is to control temperature sensors and heaters provided to a plurality of elemental substrates to appropriately perform temperature control for each of the elemental substrates, wherein a multiplexer 13 is connected to temperature sensors provided to each of a plurality of elemental substrates 14, and the detection signals of these temperature sensors are selectively output from terminals 10 of the head 20 via the multiplexer 13.

Abstract: An ink jet head includes a base member, a first member having recesses and coupled with the base member to form ink passages using the recesses and a second member integral with the first member and extending at an angle from an end of the first member, the second member having ink ejection outlets communicating with the ink passages.

Abstract: A recording head has a liquid emission section with an orifice for emitting ink, an electro-thermal transducer producing thermal energy for ink emission and a functional element electrically connected to the electro-thermal transducer. The functional element is connected to the transducer by a layer formed of the same material and at the same time as a layer of a heat generating resistive layer constituting the electro-thermal transducer, which enables the formation of a large number of functional elements on a single substrate while maintaining the elements in electrical isolation without increasing manufacturing cost.

Abstract: A sealed ink jet assembly which is removable from an ink jet apparatus includes an ink jet head which has an ejection outlet found at a first surface of the ink jet head, an energy generating element for generating energy to eject ink through the ejection outlet, and an electric contact portion for supplying an electric signal from the ink jet apparatus to the energy generating element by mounting the electric contact portion to the ink jet apparatus. The electric contact portion is provided on the surface of the ink jet head which differs from the first surface, and an integral sealing member covers both the ink ejection outlet and the electric contact portion. The integral sealing member is removed when the assembly is mounted onto the ink jet apparatus.