摘要:
A thermal transfer type color printer of this invention has four ink ribbons sequentially arranged from a first order to a fourth order along a conveying direction of a printing medium, and four printing heads respectively arranged in accordance with the four ink ribbons. Each of the printing heads melts and transfers ink included in each of the ink ribbons to the printing medium by heating the ink ribbons while each of the ink ribbons comes in contact with the printing medium. While the printing medium is conveyed, the ink of each of the ink ribbons is transferred to the printing medium so that a color image is formed. In this color printer, a melting viscosity of the ink of an ink ribbon used at a later stage is set to be lower than that used at a previous stage.
摘要:
Using a thermal transfer recording medium formed with thermal transfer recording material on a surface of a supporting material, of which dynamic shear modulus of elasticity is within a range of 1×103 Pa to 8×105 Pa, and loss tangent tan &dgr; is within a range of 0.6 to 2.5 measured in dynamic viscoelasticity measurement in a temperature range of the melting point thereof to 50° C. over the melting point at a frequency of 0.5 Hz, pressurizing the heat generating elements against the thermal transfer recording medium to bring the same into contact therewith with a load of 0.3 to 1.0 N/mm, which is a load per unit length in the main direction of the arrangement of the heat generating elements, transferring the thermal transfer recording material to the printing medium.
摘要:
A thermal transfer type color printer of this invention has four ink ribbons sequentially arranged from a first order to a fourth order along a conveying direction of a printing medium, and four printing heads respectively arranged in accordance with the four ink ribbons. Each of the printing heads melts and transfers ink included in each of the ink ribbons to the printing medium by heating the ink ribbons while each of the ink ribbons comes in contact with the printing medium. While the printing medium is conveyed, the ink of each of the ink ribbons is transferred to the printing medium so that a color image is formed. In this color printer, a melting viscosity of the ink of an ink ribbon used at a later stage is set to be lower than that used at a previous stage.
摘要:
An ink dot printer wherein an ink supply member having both insulation property and ink-impregnation property is positioned in contact with conductive recording electrodes disposed opposite to an opposed electrode through a recording medium, and ink is fed from the ink supply member to fore ends of the recording electrodes, so that a printing operation can be performed without soiling the recording medium. Accordingly the entire structure can be simplified and the ink fed to the fore ends of the recording electrodes is effectively kept undried.
摘要:
In an ink dot printer for forming a picture with ink by generating an electric field between a recording electrode and an opposed electrode confronting each other through a recording medium and thereby sputtering the ink from the fore end of the recording electrode toward the recording medium, the present invention employs a rod-shaped recording electrode composed of a conductive material with a multiplicity of longitudinal ink passages formed therein, hence enhancing the ink fluidity in the recording electrode to enable fast printing.
摘要:
A developing device effects desirable development when the amount of charging of toner, q (C/g), the amount of toner deposited on the surface of a developing roller per unit area, m (g/cm.sup.2), the speed of movement of the surface of the developing roller, v (cm/sec), the available length of the developing roller, l (cm), and the magnitude of electric resistance between the surface of the developing roller and a power source for developing bias, R (.OMEGA.), are adjusted so as to satisfy the formula, .vertline.q.vertline.m.ltoreq.100/vlR. The developing device produces a developed image desirable in quality and free from background fogging when the magnitude of a developing electric current, I (A), is adjusted so as to satisfy the formula, R.ltoreq.200/I. Further, when a charging device, an electrostatic latent image forming device, a transfer device, a cleaning device, a discharge device, a charging and cleaning device, an electrostatic latent image forming and cleaning device, a developing and cleaning device, or a discharging and cleaning device is provided with an elastic electroconductive roller composed of an elastic roller base and a flexible conductor layer, the device is allowed to decrease size and lower price, curb the decline of capacity due to protracted use, and preclude the occurrence of dispersion of characteristic, efficiency, or performance.
摘要:
An ink-dot printer comprises a pair of slit forming members arranged to define a slit therebetween, an ink tank for storing ink in which the slit is immersed, a recording sheet opposed to the slit, a needle movable between a rest position and a projected position, a driving mechanism for moving the needle between the two positions, and an ink attracting unit for generating a magnetic or electric field in the slit, thereby attracting the ink from the ink tank into the slit to cause the ink to attach to the distal end portion of the needle located in the rest position, the ink attracting unit being adapted to generate an ink attracting magnetic or electric force of a necessary intensity for the ink to be attracted from the ink tank into the slit at the time of ink attraction, and to generate an ink holding magnetic or electric field of a minimum necessary intensity for a predetermined amount of ink to be held in the slit after the predetermined amount of ink is attracted into the slit, wherein the ink attaching to the distal end portion at the rest position is moved to the recording sheet to form an ink dot thereon as the needle moves to approach the recording sheet in a projected position.
摘要:
A photoconductor is disclosed, which comprises a conductive cylindrical support which is substantially not hollowed, the conductive cylindrical support having a drive transferring mechanism coaxially and unifiedly provided on at least one of the end portions thereof, the conductive cylindrical support having a photoconductive layer on the outer periphery. The moment of inertia I (g . cm.sup.2) of the substantially not-hollowed conductive support is in the range of 0.4.ltoreq.I.ltoreq.140 (g . cm.sub.2), the diameter thereof being in the range from 0.5 to 2.0 cm. When the relation of C/(S . .omega.).ltoreq.0.4 (where S (cm.sup.2) is the square measure of the portion of the photoconductive layer on the photoconductor; C (cal/.degree.C.) is the heat capacity of the substantially not-hollowed cylindrical support; and .omega. (rad/s) is the rotating speed in development) is satisfied, high quality images can be readily and stably obtained without damages of the drive system.
摘要:
An ink dot printer wherein an ink supply member having a recording electrode fed with ink at the fore end is disposed opposite to an opposed electrode through a recording medium and wherein a picture is drawn with the ink splattered from the fore end of the recording electrode toward the recording medium by generating a potential difference between the opposed electrode and the recording electrode is such that the recording electrode is composed of a conductive material formed on an ink supply member by thin-film technique whereby the ink supply member has both an insulation property and an ink-impregnation property.
摘要:
A thermal printer is comprised of a head section for applying heat with pressure to a transfer film having a metal foil, arranged to cover an ink layer of a desired pattern formed on print paper, and removed to transfer the metal foil toward the print paper, and a controller for controlling the head section such that the transfer film is heated with a heating pattern larger than the pattern of the ink layer by at least a margin for positional displacement between the ink layer and the head section, so as to obtain a lamination transfer object in which a contour of the metal foil is aligned with that of the ink layer by an adhesive force between the metal foil and the ink layer.