Abstract: An ink printer designed to make users free from any danger when an inktank is replaced and to prevent ink from leaking out when the inktank is detached. The joint part of an inktank is pressed against the ink guide of a print head to couple the inktank and the print head together, so that ink is supplied from the inktank to the print head. The joint part is supplied with a porous material. When the inktank is attached, the porous material is compressed and contained in the joint part. When the inktank is detached from the print head, the volume of the porous material increases thereby raising its porosity. The ink remaining in the joint part is absorbed by the porous material whose porosity has been raised, so that ink is prevented from flowing out in the vicinity of the joint part when the inktank is removed.

Abstract: A compact multi-position spindle-and-turret winder for winding synthetic continuous fibers having a first winding position and one-four subsequent indexed winding positions and a method for winding continuous filaments are provided.

Abstract: In an ink tank, a main ink chamber is contiguous to a sub ink chamber containing an absorption member, and an air communication hole is formed on the top of the sub ink chamber. The absorption member holds ink pressure constant by capillary attraction of the absorption member. First, ink in the sub ink chamber is consumed with consumption of ink. When ink is consumed in a predetermined amount, air passes through the absorption member and a meniscus forming portion to form bubbles, which then move to the main ink chamber. Ink pressure is held constant by surface tension of the meniscus forming portion. Even if ink remains in a small amount, the ink leading portion makes the meniscus forming portion wet for holding ink pressure.

Abstract: A joint part of an ink tank has a connection part capillary member. A filter is placed at the tip of an ink introduction part on the side of a recording head. The ink tank is connected by bringing a face of the filter into contact with the connection part capillary member; liquid connection is made without entry of air. At this time, a force of pressing the connection part capillary member against the inside of the ink tank occurs. However, since the connection part capillary member is provided with a presser part on the rear side, the presser part absorbs the press pressure and the contact state is stable, preventing the connection part capillary member from being detached to the inside of the ink tank. Additionally, the ink tank has a seal material for sealing the ink supply hole in a state in which the tank joint part is detached from the recording head joint part.

Abstract: In an ink tank, there are provided a main ink chamber containing a capillary vessel member, and an intermediate ink chamber. When the ink is consumed, the ink held by capillary force of a capillary vessel member is supplied via a communication port from a joint port. The same amount of air as the amount of the consumed ink is conducted from the atmospheric communication port into the main ink chamber. The conducted ink is supplied via a groove formed in a lid to an upper surface of the capillary vessel member. As a result, the air is entered into the capillary vessel member under better condition. In a plane portion of the lid, the ink is in contact with only the capillary vessel member, and the ink remaining this portion is reduced. Thus, the ink using efficiency is increased.

Abstract: An ink jet printer which causes ink to fly to a recording medium to form an image, comprising: plural nozzles functioning as ink ejection ports; plural individual flow paths which are disposed with respectively corresponding to the nozzles, the individual flow paths respectively having driving elements which eject internal ink through the nozzles; a common liquid chamber which communicates with the individual flow paths, the common liquid chamber having an opening portion through which ink is supplied into the chamber; an ink supply path which has a sectional area smaller than a sectional area of the opening portion of the common liquid chamber, the ink supply path being connected to the opening portion to guide ink to the common liquid chamber; and an ink supply source for supplying ink through the ink supply path.

Abstract: An ink supply passage 16 has a large cross-sectional area and ink tanks 6 are connected to the top of the ink supply passage 16. An ink supply passage 17 is a flow passage shaped like a semicylinder and has a cross-sectional area equal to or smaller than the cross-sectional area of the ink supply passage 16. Even if bubbles are mixed into the ink supply passage 17, they adhere to the upper portion of the flow passage 17 and do not flow into lower corners, so that a flow passage can be provided and the ink flow is not hindered. Since an ink supply passage 19 connected to a head chip 4 has a small diameter, bubbles mixed into the ink supply passage 19 can be removed by maintenance for sucking ink forcibly. Bubbles mixed upstream are not transported to the ink supply passage 19 because of the flow rate difference caused by the cross-sectional area difference.

Abstract: An ink jet printer comprises a plurality of print heads 23, 23' respectively communicating with interiors of mutually different ink tanks Tk, Ty, Tm, and Tc and each having an ink nozzle for ejecting ink accommodated in each of the ink tanks Tk, Ty, Tm, and Tc onto a printing surface, wherein the position of a distal end of the ink nozzle having a higher velocity of an ink droplet ejected from the distal end of the ink nozzle is disposed at a position apart farther from the printing surface than the position of a distal end of the ink nozzle having a lower velocity of the ink droplet, so as to reduce variations in a timing when the ink droplet ejected from each of the ink nozzles reaches the printing surface.

Abstract: A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100. The surface speed of the pressure roller 5 is controlled to be higher than that of an empty tube until the yarn is switched to the empty tube, wherein the controlled speed is approximately the same as or lower than the surface speed of a fully loaded tube, and the surface speed of the pressure roller is controlled to be approximately the same as the surface speed of the empty tube after the yarn has been switched to the empty tube.

Abstract: An ink jet print head is disclosed which comprises: a head chip having a plurality of heating elements thereon, a flow passage forming member including a plurality of injection ports respectively corresponding to the heating elements for jetting out ink, a substrate for fixing the head chip, and a joint for supplying ink, wherein the substrate includes an opening so formed as to extend in the arrangement direction of the heating elements, the flow passage forming member is disposed so as to cover the opening from a position above the head chip, at least part of the joint is connected to the flow passage forming member, and ink supplied from the joint is supplied along the flow passage forming member to the heating elements disposed on the head chip.

Abstract: A main ink chamber with a through-hole contains a capillary member. An intermediate ink chamber is provided on the side wall of the main ink chamber. A path communicatively interconnects the main ink chamber and the intermediate ink chamber. A second meniscus forming member is disposed in a joint port, to thereby prevent ink leakage. In a print mode, ink flows from the main ink chamber to the joint port, through a meniscus forming member that is disposed in the through-hole. Air bubbles mingled into the ink move along the slanting upper wall of the path by their buoyant force, and are accumulatively stored in the upper part of the intermediate ink chamber. When ink is reduced to zero in the main ink chamber, air bubbles are introduced into the intermediate ink chamber through the meniscus forming member. As a result, the liquid level of the intermediate ink chamber is quickly reduced, thereby indicating a state that ink is used up.

Abstract: An ink tank has a main ink chamber which is hermetically sealed and communicated with an ink jet head connected to a lower portion of the main ink chamber, through a communicating passage, and in which ink is to be contained, and an auxiliary ink chamber which is communicated with a lower space of the main ink chamber through a communicating passage. A porous member is packed in the auxiliary ink chamber.

Abstract: A cooling device for a false twisting machine having a fixed wall member 16 and movable wall members 18a and 18b which have faced side surfaces between which yarn treatment passageways 19a and 19b are formed. The facing side surfaces are formed with yarn contacting portions 16a1 and 16b1 and 18a-1 and 18b-1, which are spaced along the direction of the running of the yarn in the yarn treatment passageways. The arrangement of the yarn contacting portions are such that contact with the yarn occurs alternately between the fixed wall member 16 and movable wall members 18a and 18b. A sucking duct 14 is opened to the yarn treatment passageways 19a and 19b to generate flows of fluid transverse to the running direction of the yarn in the passageways 19a and 19b.

Abstract: Considering the differential pressure .DELTA.P between pressures applied to both faces of a meniscus formation member, the differential pressure .DELTA.P becomes the maximum when an ink supply unit is left standing with the meniscus formation member placed upward. At this time, water head PH of ink attempting to fall due to gravity is applied to the inner face of the meniscus formation member in the same direction as negative pressure PR of a capillary member. Thus, the differential pressure .DELTA.P becomes .DELTA.P=PR+PH. The bubble point pressure PB of the meniscus formation member is set greater than the maximum value of the differential pressure, .DELTA.P=PR+PH, whereby air does not enter an ink tank through the meniscus formation member.

Abstract: A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100.

Abstract: An ink supply device for use in an ink jet printer comprising a main ink chamber in communication through a communication hole with a sub-ink chamber containing an ink absorbing member therein. A meniscus film forming member covering the communication hole and communicating the main ink chamber with the sub-ink chamber; the member having a first surface facing the interior of the main ink chamber and an opposite second surface. An ink guide member extending into a lower portion of the main chamber and also being in contact with the first surface of the film forming member, wherein as ink in the main ink chamber is consumed a differential pressure between the first and second surfaces of the film forming member causes a gradual expansion of a liquid meniscus film into an air bubble on the film forming member to maintain a constant negative pressure in the main ink chamber.

Abstract: To improve the success rate of yarn switching by reducing the variation of the winding tension during the yarn switching operation, a turret type yarn winder is provided, wherein the upper yarn switching mechanism 8 and the lower yarn switching mechanism 9 are provided at positions wherein, when the empty bobbin 50 held by the spindle 4 is displaced by the rotation of the turret member 2 toward the yarn 60 supported by the respective yarn path restriction guides of the yarn switching mechanisms 8, 9, the circumference of the empty bobbin 50 is brought into contact with the yarn 60 at a contacting angle, which angle increases as the turret member rotates, and wherein the dog portion 30 mounted to the turret member 2 causes the yarn searching guide 25 of the lower yarn switching mechanism 9 to rotate in synchronism with the rotation of the turret member 2, and the guide plate 31 for forming the anchor yarn winding is actuated to move the yarn 60 in the axial direction of the bobbin 50.

Abstract: An ink tank has a main ink chamber which is hermetically sealed and communicated with an ink jet head connected to a lower portion of the main ink chamber, through a communicating passage, and in which ink is to be contained, and an auxiliary ink chamber which is communicated with a lower space of the main ink chamber through a communicating passage. A porous member is packed in the auxiliary ink chamber.

Abstract: To reliably carry out the yarn-catching operation and formation of bunch-winding and tail-winding, while using a bobbin having no yarn-catching groove thereon, and obtain a package with a shorter yarn end extended from the bunch-winding part, upstream of a pressure roller 7, a yarn-holding guide 24 is provided for guiding a running yarn to a bunch-winding position; downstream of an empty bobbin 70, a yarn-searching guide 29 is provided for guiding the yarn to the yarn-catching part or a threading guide 33 and a yarn-winding guide 37 movable toward a concave space (A) formed by the pressure roller 7 and the empty bobbin 70 carried on a spindle 4 to guide the yarn 80 running to a full bobbin 70' or others to a yarn-catching part B formed between the abutting end walls of adjacent empty bobbins 70 carried on the spindle 4.

Abstract: A yarn winder in which a fluctuation of winding tension is avoided and the winding characteristics are made uniform from the most inner to the most outer layer. Yarn is wound by a winder in which a spindle 2 having a positively driven pressure roller 5 is positively driven, the pressure roller 5 being positioned so that it is not in contact with a tube 100 immediately after the yarn setting operation. After a predetermined amount of yarn layer has been wound on the tube 100, the pressure roller 5 is moved so that it contacts the yarn layer on the tube 100. The surface speed of the pressure roller 5 is controlled to be higher than that of an empty tube until the yarn is switched to the empty tube, wherein the controlled speed is approximately the same as or lower than the surface speed of a fully loaded tube, and the surface speed of the pressure roller is controlled to be approximately the same as the surface speed of the empty tube after the yarn has been switched to the empty tube.