Abstract: A plate type heat pipe comprises two plate members facing each other to form a hermetically sealed container, on either one of which plate members at least one heat generating parts are mounted, at least one heat transfer block having a cross sectional area equal to or larger than a cross sectional area of the heat generating part, the heat transfer block being disposed at a prescribed position within the hollow portion corresponding to a position of the plate member to which the heat generating part is thermally connected, and a working fluid enclosed in the container.

Abstract: A liquid jetting device includes a plurality of liquid passages each having a liquid ejecting element and communicating with an ejection hole, a common liquid chamber communicating with each of the plurality of liquid passages and an air bubble introducer for making a non-disappearable air bubble formed by thermal energy exist in the common liquid chamber before a start of liquid ejection. The liquid is allowed to be ejected in the presence of the air bubble. The non-disappearable air bubble functions as a buffer to absorb pressure during discharge to restrict flow of the ink in the direction opposite to the discharge port.

Abstract: An ink filling method for filling an ink cartridge with ink to be supplied to a recording head for ejecting ink includes providing an ink cartridge having a negative pressure producing material accommodating portion and an ink accommodating portion, the negative pressure producing material accommodating portion accommodating a negative pressure producing material and being provided with an air vent, and the ink accommodating portion being substantially hermetically sealed except for fluid communication with the negative pressure producing material accommodating portion, and accommodating directly the ink to be supplied to the recording head, the ink cartridge further includes a partition wall between the negative pressure producing material accommodating portion and the ink accommodating portion, the partition wall being provided with a gap for permitting formation of meniscus of the ink; and directly injecting the ink into the ink accommodating portion.

Abstract: A plate type heat pipe comprises: a plate type container which includes a heat absorbing side and a heat dissipating side to form a hermetically sealed hollow portion; at least one heat transfer block which is thermally connected to each of inner walls of the heat absorbing side and the heat dissipating side; a wick which is placed along a side wall of the heat transfer block through the inner wall of the heat dissipating side; and a working fluid enclosed in the hollow portion. A securing member to secure the wick and the heat transfer block in close contact may be further included.

Abstract: A compressed mesh wick prepared by bending for plurality of times at least one sheet of band type mesh wire to form a prescribed shape, thus preparing a bent layered mesh body, and pressing the bent layered mesh body.

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: A liquid container for a liquid jet recording apparatus includes a first chamber containing negative pressure producing material and having a liquid outlet. At a lower part of the cartridge and contactable to the liquid jet head, the liquid container supplies liquid from the cartridge to the liquid jet head. An air vent allows ambient air into the cartridge. A second chamber communicates with the first chamber by means of a communication part, except for which the second chamber is substantially hermetically sealed. The second chamber is disposed at the lower part of the cartridge and provides a liquid reservoir for the first chamber.

Abstract: A liquid discharging head has at least a discharge port for discharging liquid therefrom, a liquid flow path communicating with the discharge port to supply the liquid to the discharge port, a substrate provided with a heating member for creating a bubble in the liquid filling the liquid flow path, and a movable member having a movable portion having its free end at the discharge port side and provided at a location facing the heating member of the substrate with a gap with respect to the substrate, a supported and fixed portion supported on and fixed to the substrate, and a supporting portion provided near the supported and fixed portion of the movable portion. The free end of the movable member is displaced toward the discharge port side about the fulcrum portion of the movable member by pressure produced by the bubble being created to thereby discharge the liquid from the discharge port.

Abstract: An ink cartridge includes a negative pressure producing material; an accommodating portion for accommodating the negative pressure producing material, the accommodating portion is provided with an opening for receiving an ink supply tube of an ink jet recording head; wherein the material is sandwiched between surfaces in the accommodating portion, and a distance between the surfaces smaller than twice an outer diameter of the ink supply tube.

Abstract: An ink-tank cartridge has a first storage chamber housing a negative pressure generating member and having an atmosphere communicating portion communicated with the atmosphere, a second storage chamber in substantially enclosed condition and communicated with the first storage chamber only through a fine communicating portion located remote from said atmosphere communicating portion, and directly storing an ink to be supplied to the first storage chamber, the second storage chamber being arranged adjacent the first storage chamber; and an enclosed ink storage portion only communicated with the second storage chamber and located at respective side surfaces of the first and second storage chambers. The bottom surface of the enclosed ink storage portion is located at higher position than the bottom surface of the first and second storage chambers.

Abstract: Ink which contains surfactant in the amount of not exceeding the critical micelle concentration in the ink but exceeding the critical micelle concentration in purified water, is filled into a cartridge, comprising a first chamber which encloses a negative pressure producing material, and a second chamber in communication with said first chamber only through a narrow passage Then, said ink is supplied to ink jet head and printed.

Abstract: A replaceable ink cartridge has a body for storing the ink; an ink outlet for supplying the ink into a recording head; an air communicating port for communicating with an atmosphere; a peripheral portion around the ink outlet; a peripheral portion around the air communicating port; a seal member for removably sealing the peripheral portion around the ink cutlet and the peripheral portion around the air communicating port. The replaceable ink cartridge has a structure that is formed so as to strip the seal member off from the peripheral portions of the ink outlet and the air communicating port in a manner that the air communicating port is opened at first and the ink outlet is opened at second.

Abstract: An ink jet head for ejecting ink, has an ink ejecting portion having an ink ejecting port formed thereon so as to eject ink through the ink ejecting port, a positioning portion for definitely determining the position of the ink jet head relative to an apparatus using the ink jet head when the ink jet head is fitted to the apparatus, an ink supplying portion adapted to be connected an ink supplying unit while ink is supplied to the ink jet head, and an electric connecting portion adapted to be electrically connected to an electric connecting portion on the apparatus side so as to send and receive signals. The positioning portion, the ink supplying portion and the electric connecting portion are disposed on a different surface from a surface on which the ink ejecting portion is disposed and at least one of the electric portion and the ink supplying portion is disposed on an opposite side surface to a surface on which the positioning portion is disposed.

Abstract: A recording apparatus using a recording head to effect recording on a recording material includes a recording head unit provided with a recording head for effecting recording on a recording material including a recording head supporting member for supporting the recording head at a predetermined position; a relaying electric contact member including a first electric contact member for external electric connection; a second electric contact for electrically connecting the first electric contact member with the recording head; and an electric current supplying device for supplying electric current to the first electric contact member.

Abstract: A method for making a record with multiple levels of a gradation on a recording medium, has the following steps:preparing a device for ejecting inks of different densities in a plurality of ejection amounts, respectively;linearizing a relationship between gradation and image density so that levels of the gradation of each of the inks of different densities can be interpolated with others; andmaking a record on a recording medium in response to multiple-level recording data in accordance with the relationship between gray scale and image density.

Abstract: A composition comprising a water-soluble cationic group-containing high-molecular compound (P1) derived from the reaction of (A) epichlorohydrin and a dialkyl or dialkanol amine, or (B) a glycidyl group-terminated hydrophilic oligomer and a diamine, dialkylamine or dialkanolamine; optionally, a high-molecular compound (P2) having a condensable functional group in a side chain such as alkylolacrylamide-bearing high-molecular compound (E) or hydrolyzable trialkylsilyl group-containing acrylic ester high-molecular compound (F); and a poly(meth)acrylate (P3) is coated onto a substrate and cured by ultraviolet radiation to form a printing medium.

Abstract: An ink container for containing ink to be supplied to an ink jet head, includes fibrous material; an ink discharge port for discharging the ink to the ink jet head; a portion for containing the fibrous material at least adjacent the ink discharge port; wherein the fibrous material is deformed within a degree of elasticity, forming a plurality of intersections in different directions, and contained in the containing portion.

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 cartridge includes a first chamber for accommodating a negative pressure producing material and provided with air communication part for communication with ambient air, wherein a part of the negative pressure producing material does not contain ink adjacent the air communication part; a second chamber which is substantially closed except for a fine communication part for communication with the first chamber at a position away from the air communication part, wherein the second chamber directly accommodates the ink to be supplied to the first chamber.