摘要:
An impact printer has a print head in which demagnetizing coils are embedded in a filling compound. A resistor or Zener diode is connected in series between the print head and the printer's frame ground, to prevent current flow through the filling compound from causing corrosion of the demagnetizing coils, while permitting discharge of static charge from the print head to ground.
摘要:
An ink jet recording apparatus is provided with a black head and a plurality of color heads. The black head has a predetermined number of first orifices aligned at predetermined intervals (e.g. 0.0169 mm) in a sub scanning direction (direction in which a print medium travels). The plurality of color heads eject different colored ink drops. Each color head has the predetermined number of second orifices aligned in the sub scanning direction perpendicular to the main scanning direction. The second orifices of adjacent color heads are aligned in a main scanning direction perpendicular to the sub scanning direction.
摘要:
An ink jet head has a plurality of ink pressure chambers defined therein and a surface to which a plurality of ink pressure chambers open. An orifice plate having an orifice therein is bonded to the surface. When manufacturing the ink jet head, a coating of an insulating material is first formed on an inner wall of the ink pressure chambers and subsequently a re-dissolvable curingresin is applied to the ink jet head in an area from the inner walls to the surface. Then, the coating and the resin deposited on the surface are removed from the surface. Then, the resin deposited on the coating in the ink pressure chambers is dissolved to remove the resin from the inner wall. Finally, the orifice plate is bonded to the surface.
摘要:
A structure of internal combustion engine comprises a cylinder member composed of a cylinder which accomodates a piston connected with a crankshaft, a crankcase provided to accomodate said crankshaft, a rocker case provided to accomodate a valve actuating mechanism, an oil return passage constituting means for leading oil in said rocker case into said crankcase, and a restraining means for restraining an air flow within said crankcase from entering into said oil return passage constituting means. By the effect of the restraining means provided in relation to the oil return passage constituting means, the air flow generated by the rotation of the crankshaft does not work as a dynamic pressure of hingering the flowingdown of oil.
摘要:
A transfer arrangement is used in a transfer portion of an image forming apparatus. The transfer arrangement includes an electrically conductive member that contacts a toner image bearing member of the image forming apparatus. The electrically conductive member is made of polyurethane resin to which electrically conducive polymer is added. An adding amount of the electrically conductive polymer with respect to the polyurethane resin is from 8 wt % to 40 wt %.
摘要:
The grease composition of the present invention contains, in a lubricant base oil, 0.01 to 10% by mass of a fatty acid salt, 0.01 to 10% by mass of carbonate, 2 to 30% by mass of a thickener, and 0.1 to 20% by mass of a sulfur type extreme-pressure agent on the basis of the total amount of composition.
摘要:
A method of manufacturing a print head is for use with an ink Jet printer. The print head includes a plurality of parallel ink pressure chambers defined by a plurality of walls and a cover bonded on the top surfaces of the walls. The method includes the steps of forming a plurality of parallel grooves in a piezoelectric element, the grooves being bounded by a plurality of parallel walls aligned in a row; and applying an adhesive either to the top surfaces of the walls or to a surface of a cover in registration with top surfaces of the walls, the adhesive being applied by screen printing, the adhesive being applied by moving a squeegee in a direction perpendicular to a direction in which the grooves extend.
摘要:
An ink jet recording apparatus includes a printhead that ejects black ink drops and colored ink drops through a plurality of corresponding ink nozzles in accordance with print data. The printhead ejects ink drops when the printhead is moved to scan a recording medium in a forward direction and a reverse direction opposite to the forward direction. The forward and reverse directions are perpendicular to a direction in which the recording medium travels. A print data identifier separates the print data for a line into black print data and color print data. A print data selector supplies one of the black print data and color print data to the printhead when the printhead scans the recording medium in the forward direction, and the other of the black print data and color print data to the printhead when the printhead scans the recording medium in the reverse direction.
摘要:
A method of adjusting an ink jet head having at least one polarized electromechanical transducer forming an ink pressure chamber from which ink drops are ejected when the electromechanical transducer is deformed. The method includes the steps of performing a first polarization operation where the electromechanical transducer is polarized into saturation in a first direction, and performing second polarization operation where the electromechanical transducer polarized by the first polarization operation is polarized in a second direction opposite to the first direction so that the electromechanical transducer is polarized to a predetermined level.
摘要:
An ink jet recording apparatus is of the construction where information is printed by ejecting ink drops through orifices of an ink jet head mounted on a carriage. The ink jet recording apparatus includes a cap for closing the surface of the ink jet head in which the orifices are formed. The cap is adapted to move between a first position at which the cap is fully disengaged with the orifices, and a second position at which the cap is engaged with the orifices. The cap communicates with a suction mechanism which negatively pressurizes the cap when the cap is at the second position. The carriage, cap, and suction mechanism are controllably driven by a controller. The cap is provided with an engagement member, which may take the form of a sweep blade, attached to its tip for sweeping the surface in which the orifices are formed. The controller causes the carriage to move when the engagement member moves to the second position so that the engagement member sweeps the surface to remove denatured ink and foreign matters from the orifices into the cap.