摘要:
A cleaning device and process cartridge comprising same for an image formation apparatus, which prevents cleaning failures due to toner slipping past a blade, based on an equation for the force of toner particle rotation and the restraining force. Toner on an image carrier is removed by a blade. The relation between the blade and the image carrier satisfies the equation f(θ)=μ2−μ1×(Ntp/Nbt+cos θ)>0. Here μ1 is the friction coefficient between toner and image carrier, μ2 is the friction coefficient between toner and blade, Ntp is the adhesive force between toner and image carrier, Nbt is the force received by the toner from the blade, and θ is the angle formed by the blade and image carrier (the cleaning angle).
摘要:
A cleaning device and process cartridge including the same for an image formation apparatus, which prevents cleaning failures due to toner slipping past a blade, based on an equation for the force of toner particle rotation and the restraining force. Toner on an image carrier is removed by a blade. The relation between the blade and the image carrier satisfies the equation f(θ)=μ2−μ1×(Ntp/Nbt+cosθ)>0. Here μ1 is the friction coefficient between toner and image carrier, μ2 is the friction coefficient between toner and blade, Ntp is the adhesive force between toner and image carrier, Nbt is the force received by the toner from the blade, and θ is the angle formed by the blade and image carrier (the cleaning angle).
摘要:
A cleaning device including an elastic blade whose tip is contacted with a surface of a rotating member in such a manner as to counter the rotated member to remove particles of a toner on the rotated member; and a holder configured to support the elastic blade, wherein a nip formed by longitudinal end portions of the tip of the blade and the surface of the rotated member has a first nip width in a rotation direction of the rotated member, and a nip formed by a central portion of the blade and the surface of the rotated member has a second nip width, and wherein the first nip width is less than the second nip width.
摘要:
An ink jet head used for pulsed droplet ink jet printer uses a grooved piezo-electric element. The piezo-electric element includes a plurality of grooves, diaphrams and actuators. The actuator and two grooves at both sides of the actuator, filled with stuffing material, covers a corresponding one of passages. Therefore, even if the stuffing material moves when the actuator is energized, an interference problem does not occur. Consequently, the flexure force of each actuator can transmit to the corresponding passage to jet ink in the passage via a nozzle.
摘要:
A liquid jet recording head includes a flow path member having a plurality of flow paths, each of the plurality of flow paths having an opening surface which opens on the flow path member, an piezo-electric member having a plurality of grooves and piezo-electric elements, each of the piezo-electric elements being formed between adjacent two grooves of the plurality of grooves, the piezo-electric member being connected to the flow path member so that each of the piezo-electric elements is faced to the opening of one of the plurality of flow paths, an elasticity member being filled in each of the plurality of grooves formed on the piezo-electric member, a liquid guide mechanism guiding, to each of the plurality of flow paths, liquid which is supplied by an external liquid supplying mechanism, and jet orifices, each of the jet orifices being provided to an end portion of one of the plurality of flow paths.
摘要:
An ink-jet printer includes an ink-jet head assembly which has a modular structure. The head assembly includes a generally bathtub-shaped bottom case in which an ink head for ejecting a series of charged ink droplets is mounted and a pair of top and bottom deflection electrodes is also mounted. The head assembly also includes a similarly bathtub-shaped top case which is mounted on the bottom case upside down to define a substantially enclosed space therebetween. The ink head is supported so as to be adjustable in orientation. And, one end of the ink head is supported as a pivotal point so that the other free end may be oriented in any desired direction. In another structure, a print head assembly is detachably mounted on a carriage and the print head assembly includes an inner ink mist absorbing member formed with a slit and formed from a metal. A carriage cover is detachably mounted on the carriage to cover the print head assembly set in position. The carriage cover is provided with an outer ink mist absorbing member formed with a slit and formed from a resin material.
摘要:
A cleaning device cleans off a toner from a surface of a member rotating in a first direction. The cleaning device includes a blade made of an elastic material including a tip portion with a slanting portion that is pressed against the surface in a second direction counter to the first direction. A supporter supports the blade. An angle between the slanting portion and a longitudinal direction of the blade is obtuse. The slanting portion is pressed against the surface at a surface pressure of 2.0 MPa or more.
摘要:
An ink jet printing head includes: a plurality of piezoelectric actuators arranged in rows on a substrate, each row including first piezoelectric elements and second piezoelectric elements which are alternately arrayed along the row, the first piezoelectric elements being actuatable to apply a compressive force to ink in accordance with print signals, the second piezoelectric elements being fixed and not actuated; and an ink chamber unit which includes ink chambers located above the first piezoelectric elements and containing ink. The ink chamber unit includes: an oscillation plate including diaphragm portions which are connected to the first piezoelectric elements and independently deformable in a direction perpendicular to the substrate by the first piezoelectric elements when actuated; and a nozzle plate which includes nozzles being located above the diaphragm portions and opened to the ink chambers, so that ink drops are respectively forced out from the nozzles when the first piezoelectric elements are actuated.
摘要:
A device for detecting viscosity of a liquid which varies with time includes a first tank provided with an overflow section for maintaining a predetermined liquid height, and a second tank fluidly communicated to the first tank and provided with a restricted outlet, or orifice. While a liquid is circulated through the two tanks by a pump, a height sensor which is dipped in the liquid in the second tank senses a liquid height in the tank in terms of capacitance. The output of the height sensor is representative of a viscosity of the liquid.
摘要:
A cleaning unit for removing toner remaining on the surface of the image carrier of an image-forming apparatus is disclosed. The cleaning unit includes a vibration member, a blade member, and a driving part. The vibration member extends in the direction of the width of the image carrier, and has at least one vibration application part attached thereto. The blade member is attached to at least the end region of the vibration member, extending in the direction of the width of the image carrier. The driving part drives at least one vibration application part at a driving frequency that is a resonance frequency. The vibration member provides vibration to the blade member and a force to press the blade member against the image carrier.