Toshihiro Bansyo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: In order to settle a phenomenon that a quantity of jetted ink increases at the end of an image and a density increases in a shear-mode ink jet head, in a three-split driven head, a first group prints so that a diameter of a dot is reduced by reducing the quantity of jetted ink as dots at both ends, a second group similarly prints, and a third group also similarly prints. Since three dots at both ends in a main scanning direction of an acquired image are smaller than dots in the middle, the phenomenon that a quantity of jetted ink increases at the end of the image and density increases is reduced.
Abstract: A controller works with a measure of temperature of ink at a temperature sensor within a first temperature range to have an inkjet head propel out droplets of ink at a first discharge speed for formation of images, and with a measure of temperature of ink at the temperature sensor within a second temperature range lower than the first temperature range to have the inkjet head propel out droplets of ink at a second discharge speed greater than the first discharge speed for formation of images, and the controller determines that end regions of a frame of images to be formed in regions at transfer-longitudinal ends of a sheet to be transferred in a sheet transfer system have a print ratio within a prescribed range, to execute formation of images.
Abstract: An ink jet printer is provided with an ink circulation route in which are arranged an ink jet head for ejecting ink, a first tank for supplying ink to the ink jet head, a second tank for collecting ink which is not consumed by the ink jet heads. The ink jet printer comprises a measuring unit operable to obtain a value indicative of the flow resistance measured when ink flows the first tank to the second tank through the ink jet head; and a control unit operable to select one of maintenance operations on the basis of the value indicative of the flow resistance as obtained. Particularly, when the value indicative of the flow resistance as obtained is lower than a predetermined value, the control unit selects the operation of circulating ink around the ink circulation route as the one of maintenance operations, and the maintenance unit does not perform the maintenance operation which consumes some amount of ink.
Abstract: In an inkjet printer where an ink recycling path for recycling ink is formed by connecting among an ink head, an upstream tank, and a downstream tank, the inkjet printer includes a temperature detecting unit that detects a temperature of recycling ink, a temperature changing unit that is installed in the ink recycled path and changes the temperature of the recycling ink so that the temperature of the recycling ink reaches a predetermined temperature, and an ink recycling amount changing unit that is installed at the upstream tank and changes an ink recycling amount according to the change in temperature of the recycling ink. Time required to make the temperature of the recycling ink reach the predetermined temperature can be shortened.
Abstract: An inkjet printer includes: an ink recycling path that recycles ink; an ink head 1 that performs printing by discharging the recycled ink; an ink supplying port that supplies ink from the ink recycling path to the inside of the ink head while controlling the pressure; and an ink discharging port that discharges ink from the inside of the ink head to the ink recycling path while controlling the pressure. When moving from a standby state where the recycling of ink in the ink recycling path remains stopped to a printing preparing state, an amount of ink smaller than an ink recycling amount during the printing is recycled for a predetermined time. Thereby, leakage of the ink and the inhalation of air bubbles from the nozzle are prevented by suppressing the change in pressure of the nozzle, and ink having high viscosity, which is the cause of these defects, is also removed when the recycling of ink starts.
Abstract: The object of the invention is to settle a phenomenon that a quantity of jetted ink increases at the end of an image and a density increases in a share-mode ink jet head. In a three-split driven head, a first group prints so that a diameter of a dot is reduced by reducing the quantity of jetted ink as dots at both ends, a second group similarly prints, and a third group also similarly prints. Since each three dots at both ends in a main scanning direction of an acquired image are smaller than dots in the middle, a phenomenon that a quantity of jetted ink increases at the end of the image and density increases is reduced.
Abstract: A stencil printer has a rotary printing drum removably supported in a printer body. A lamp is provided inside the printer body, and a control circuit permits, in response to an action necessary for maintenance of the printer body, the lamp means to be turned on.
Abstract: In a stencil sheet clamping construction for clamping a leading end portion of a stencil sheet to a stencil printing drum, a press plate is set at a half open position making an acute angle against an upper surface of a base portion when the leading end portion of the stencil sheet is mounted. This allows the leading end portion of the stencil sheet to be lifted above the upper surface of the base portion by floating up of an elastic film belt when the stencil sheet is discharged. This also prevents obstruction of the smooth advance of the leading end portion of the stencil when it is mounted due to the floating up of the elastic film belt.