摘要:
An image forming apparatus comprises a rotatable rotating body to and from which a plurality of developer containers can be attached and detached, each of the developer containers being capable of containing developer of a different color. When the image forming apparatus continuously forms images on a plurality of number of sheets of media using the developer of a single color contained in one of the developer containers attached to the rotating body, the image forming apparatus causes rotational movement of the rotating body at least once at least either when the image forming apparatus starts to continuously form the images, or when the image forming apparatus ends the continuous formation of the images.
摘要:
In an image forming apparatus capable of selectively carrying out a color print mode or a monochromatic print mode, the individual print modes are carried out as follows. In the color print mode, images are arranged on an intermediate transfer belt 71 with a first spacing d1(a) suited for the color print mode, the first spacing shorter than a second spacing d2(a). Hence, the second spacing d2(a) may be increased by the amount that the first spacing d1(a) is decreased, so that a sufficient time for the changeover of developers 4Y, 4M, 4C, 4K may be afforded. In the monochromatic print mode, on the other hand, adjustment is made to equate the first spacing d1(a) to the second spacing d2(a). This obviates a narrowed sheet spacing.
摘要:
A method for stretching an optical polymer film is described, which comprises allowing a locus L1 of the holding means from a substantial holding Initiation point to a substantial holding release point on one edge of the polymer film, a locus L2 of the holding means from a substantial holding initiation point to a substantial holding release point on the other edge of the polymer film, and a distance W between the two substantial holding release points to satisfy the following equation (1), maintaining the supporting property of the polymer film, stretching the film in the presence of a state in which the volatile content is 5% or more, and then, decreasing the volatile content while shrinking the film: |L2−L1|>0.4W. (1)
摘要:
The image forming apparatus has an image supporting body, a developing device on which developing units storing developers of the same color are detachably mounted, and control unit for controlling a printing operation in response to a print request. Further, in the case where the total number of print pages of a first developing unit, which is in use, exceeds the number of calibration pages if executing a print request, when a second developing unit which does not exceed the number of calibration pages exists, the control unit executes the printing operation using the second developing unit, and when the second developing unit does not exist, the control unit executes the printing operation using the first developing unit if the requested print page number does not exceed a predetermined threshold, or executes a calibration operation if the requested print page number exceeds the predetermined threshold.
摘要:
An image forming apparatus comprises an image supporting body in which a latent image is formed, a developing device which is mounted detachably with a plurality of developing units storing developers of the same color and which can move the developing units to a plurality of positions, and control unit for controlling a printing operation for adhering the developer of the developing unit on a development position onto a latent image of the image supporting body to perform development in response to a print request. Further, after finishing the printing operation using a first developing unit in accordance with a print job, or at the time of starting up the power or of predetermined initialization, the control unit moves a second developing unit used in the next print job to a specified queue position among the plurality of positions, to maintain the second developing unit in a queuing state.
摘要:
In a case where there are developers belonging to Life Rank 1 representing a service life substantially as long as that of a fresh developer (Step S501), and the developers includes one which is ready to print (Step S502), it is determined that image formation can be performed without performing a preparatory operation (Step S506). In a case where there is no print-ready developer but a developer which requires an agitation operation of rotating a developing roller by a predetermined quantity (Step S503), the agitation operation is performed on the developer (Step S504) so as to make the developer in a print-ready state. In a case where the developer cannot be made print-ready by the agitation operation, a density control operation for adjusting operating conditions of an apparatus is performed (Step S505). Thus is obviated an unnecessary operation. The developer subjected to a predetermined print preparatory process is used in a printing operation so that an image of good quality may be formed. In a case where no Rank-1 developer is available but a Rank-2 developer, deteriorated to a degree, is available, the same procedure is taken.
摘要:
A novel polarizing plate is disclosed. The polarizing plate comprises a polyvinyl alcohol based polarizer, a protective film comprising a saturated alicyclic structure-containing thermoplastic polymer, and an adhesive layer comprising a water-soluble polymer between the protective film and the polarizer wherein the surface of the protective film contacting with the adhesive layer is subjected to a surface treatment.
摘要:
An image forming apparatus includes a carrier on which an electrostatic latent image is formed, a plurality of development cartridges which develop the electrostatic latent image with toner to form a toner image to be transferred to a recording sheet, and a changeover unit which changes the development cartridges so that any one of the development cartridges is moved so as to face a surface of the carrier for development. At least two of the development cartridges contain the same color toners. The changeover unit repeatedly changes the development cartridges before an expiration of lifetime of one of the development cartridges which is positioned so as to face the carrier for the development.
摘要:
Prior to execution of a printing operation and in parallel with a warm-up operation of the apparatus, a print preparatory operation is conducted only on selected cartridges of cartridges mounted to a developing unit, thereby bringing the cartridge into a printable state. Therefore, even if the residual amount of toner in one of the selected cartridges runs short, the printing operation is allowed to continue by switching this cartridge to the next selected cartridge.
摘要:
Prior to the execution of a printing operation, a print preparatory operation is conducted only on a developer cartridge 4Ka out of the developer cartridges mounted to the developing unit thereby bringing the cartridge into a printable state. Therefore, the print preparatory operation is completed when the print preparatory operation on one (equivalent to a “priority cartridge” of the invention) of the developer cartridges mounted to the developing unit is terminated. Hence, the apparatus may be placed in the printable state in a short time so that the print preparatory operation is prevented from compelling a user to wait needlessly long and that waiting time of a user may be shortened.