摘要:
A method of and an apparatus for recording an image on a recording medium. A heat-sensitive sheet having a light-transmissive base sheet provided with a heat-fusible supercooled substance layer is made to abut a copy original such that the heat-fusible supercooled substance layer faces the original image to be copied while flashlight is projected onto the base sheet of the heat-sensitive sheet. Thus, the image portion of the copy original to be copied absorbs the light transmitted through the heat-sensitive sheet and thereby generates heat so that an adhesive area containing a pattern corresponding to the original image is formed on the supercooled substance layer. After the heat-sensitive sheet has been removed from the copy original, such an adhesive area is transferred to the recording medium owing to the adhesiveness of the adhesive area.
摘要:
A developing apparatus is provided with a container for accommodating a developer for containing magnetic particles, and a rotatable carrying member is disposed at least partly in the container and faces an image bearing member at a developing station. The rotatable developer carrying member carries the developer thereon to the developing position. A magnet is disposed in the developing carrying member and includes a plurality of magnets for conveying the developer. A magnetic member is disposed close to the circumferential surface of the developer carrying member and in a circumferential direction of the developing carrying member in a region thereof where the developer carrying member is disposed in the developer container, adjacent to a longitudinal end of the developer carrying member. The magnetic member is magnetized by the magnet and the magnetic member cooperates with the magnet to form a magnetic field for forming a magnetic brush of the developer in a gap between the magnetic member and the developer carrying member.
摘要:
An image forming apparatus wherein a laser beam produced by a laser source is imaged through an imaging optical system on an image bearing member as a beam spot. The beam spot scans the image bearing member in a main scan direction. The laser source is rendered on and off to form an image with picture elements. The laser driving pulse width per picture element is changed in accordance with the image density of the image to be formed, so that the tone gradation of the image is provided on the image bearing member in accordance with the pulse width. The size of the spot measured in the main scan direction (1/e.sup.2 diameter) is not more than 0.7 times of the size of the picture element measured in the main scan direction.
摘要:
An image forming apparatus includes an image bearing member; a plurality of first developing devices for developing an electrostatic latent image formed on the image bearing member at a developing position using a developer which includes a toner and a carrier; a rotatable member rotatable in a path including the first developing position, for supporting the plurality of first developing devices, wherein each of the plurality of first developing devices is effective to discharge excess developer produced by receiving the developer including the toner and the carrier to outside of each of the plurality of first developer devices using a rotation of the rotatable member; and a second developer container for developing an electrostatic latent image formed on the image bearing member at a second developing position using a developer including a toner, wherein the second developing device is disposed at a position so as to be non-rotatably adjacent to the image bearing member.
摘要:
An image recording apparatus includes a recording electrode having an array of electrode elements which are electrically isolated, a recording material on which an image is recorded, a driving mechanism for moving the recording material while it is opposed to the recording electrode, a magnet for generating a magnetic field across the clearance between the recording electrode and the recording material, a toner supply device for supplying the toner to the clearance, and a device for applying an imagewise voltage signal between the recording electrode and the recording material, wherein the electrode elements each have an end portion converged toward the recording material.
摘要:
A developing device for developing an electrostatic image formed on an image carrier, includes a liquid developing agent, wherein toner particles are dispersed in a liquid solvent, and wherein a viscosity of the liquid developing agent is in a range 100 mPa·s to 1000 mPa·s, inclusive, a developing container for containing the liquid developing agent, a developing agent carrier for carrying the liquid developing agent within the developing container to the image carrier, wherein the developing agent carrier is disposed so as to form a gap between the developing agent carrier and the image carrier; and a developing bias voltage power supply for applying a developing bias voltage, which superimposes a DC voltage component and an AC voltage component to the developing agent carrier, wherein a peak voltage of the AC voltage component is in a range of 0.5 kV to 2 kV, inclusive, and a frequency of the AC voltage component is in a range of 10 kHz to 12 kHz, inclusive.
摘要:
A developing apparatus for an image forming apparatus forms an electrostatic latent image corresponding to an image information signal on an image bearing member. The developing apparatus includes a developer carrying member which bears and conveys a two-component developer containing a non-magnetic toner and a magnetic carrier for forming a toner image by developing the electrostatic latent image formed on the image bearing member. Convexities and concavities are formed on a surface of the developer carrying member. An average peak-to-peak spacing (Sm) of the convexities and concavities is set at ⅓ to 6 times of a weight-average particle diameter of the magnetic carrier (D) (D/3≦Sm≦6*D). An average roughness at ten points (Rz) on the surface of the developer carrying member is set at {fraction (1/10)} to ½ times of the weight-average particle diameter of the magnetic carrier. A number of concavities which are 1 &mgr;m to 10 &mgr;m wide and 0.2 &mgr;m or more deep is smaller than 10 within a spacing of 100 &mgr;m in a surface profile of the developer carrying member. The surface of the developer carrying member is prepared by blasting the surface with definite spherical particles having a weight-average diameter d and a weight-average particle diameter D of the magnetic carrier, according to the following relation: D≦d≦10D.
摘要:
A developing device is provided with a developing container for accommodating developing agent including toner, a rotating developing agent carrier is arranged to face an image carrier carrying an electrostatic image for carrying the developing agent, and a conductive member is arranged along a longitudinal direction of the developing agent carrier with a spacing from the developing agent carrier. The conductive member is provided over longer than the longitudinal area of the developing agent carrier, and a voltage application circuit is employed for applying a voltage of the same polarity to a charging polarity of the toner to the conductive member.
摘要:
The present invention aims to improve the image forming efficiency by selecting positions where image adjusting toner images are formed to non-image areas of convey means by changing the supply timing of a transfer sheet onto the convey means, in an image forming apparatus wherein a plurality of electrophotographic photosensitive members are arranged side by side and color toner images formed on the photosensitive members are successively transferred onto a transfer sheet supplied at transfer positions for the photosensitive members thereby to form a color image on the transfer sheet.
摘要:
A developing apparatus having a supporting frame for supporting plural developing units. The supporting frame is movable to present a selected one of the developing units to a development operating position. The supporting frame is provided with positioning members for positioning the developing units. The positioning members are fixed on the movable frame in the manner that the position of the positioning member is adjustable. Each of the developing units is faced to an image bearing member at the operating position without contact to the image bearing member.