摘要:
The invention relates to a method for imaging surfaces in printing presses, whereby the surfaces to be imaged contains image information of the preceding printing job. Task of the invention is to realize a process and an apparatus for a fast and low-cost regeneration of surfaces carrying image information in printing presses. The task is solved according the invention by applying an ink receptive layer carrying the actual image information on the ink-repelling imaging surface within one operation. The existing image information from the preceding printing job is erased during this operation by a preceding erasing unit
摘要:
A method of reducing uneven use of a series of heating elements on a print head in a thermal printer comprises: selectively using certain ones of the heating elements to effect yellow, magenta and cyan dye transfers superimposed on a dye receiver medium to create a color image print smaller than the size of the receiver medium and leave a non-image non-color margin area along at least one side of the color image print; and using other ones of the heating elements to effect yellow, magenta and cyan dye transfers superimposed on a non-image non-color margin area left along at least one side of the color image print to make the margin area a shade of substantially gray or black, whereby, since those heating elements which are not to be selectively used to effect the dye transfers to create the color image print are instead used to effect the dye transfers to make a non-image non-color margin area left along at least one side of the color image print a shade of substantially gray or black, uneven use of the heating elements on the print head is reduced.
摘要:
The invention relates to a method and apparatus for correcting register faults in a multicolor printing machine (1) having a number of items of equipment (2,2null, . . . ) for the digital production of color separations (3,3null, . . . ), correction values being determined and assigned to the angular positions (4,4null, . . . ) of at least one image cylinder (5,5null, . . . ) and, as a result, being taken into account for the control of the production of the color separations (3,3null, . . . ) on said image cylinder. By means of the invention, correction values are to be made available for the correction of register faults, which, with a fine graduation, make it possible to assign them to angular positions of machine elements in a repeatable way. This is achieved by circularity errors (6,6null, . . . ; 8,8null, . . . ; 9) of machine elements (5,5null, . . . ; 7,7null, . . . ; 10) which have an influence on the register being determined, assigned to their angular positions (4,4null, . . . ; 13,13null, . . . ; 14) and, from these, the correction values for the control of the production of the color separations (3,3null, . . . ) on the at least one image cylinder (5,5null, . . . ) being determined.
摘要:
The present invention provides an image displaying medium with a metallic image, which comprises a metallic image formed on a transfer receiving material with a color image formed thereon, wherein the metallic image is formed by using a thermal transfer sheet in which at least a resinous peelable layer and a metal thin layer are provided on one surface of a substrate film in this order, the resinous peelable layer comprising a pigment and a thermoplastic resin having a glass transition temperature of 60null C. or higher and the metal thin layer comprising a composition containing an aluminum pigment prepared by forming an aluminum film by deposition on a carrier sheet with a releasing layer provided thereon, and peeling the aluminum film from the carrier sheet to finely divide it, and a binder of a thermoplastic resin having a glass transition temperature of 50 to 150null C., and the 60null, 45null, 20null specular reflection of the image surface on which the metallic image is formed is 100% or greater, and a brightness (L* value) is 20 or greater.
摘要:
Thermal line head includes an electrically-insulated base member, plural sets of at least two electric resistance elements formed on a surface of the base member and aligned with each other, and a driver circuit that selectively and electrically energizes the at least two electric resistance elements in each set in accordance with an associated digital image-pixel signal and an associated digital gradation-signal. When the digital image-pixel signal has a value null0null, none of the at least two electric resistance elements in a corresponding set are electrically energized, and, when the digital image-pixel signal has a value null1null, the selective and electrical energization of the at least two electric resistance elements in the corresponding set are performed in accordance with values of the digital gradation-signal, wherein a total thermal energy output of each of the plural sets of at least two electric resistance elements is stepwisely adjustable.
摘要:
An image formation method and a thermal transfer sheet for use in the image formation method are provided. According to the image formation method and the thermal transfer sheet, an intermediate transfer recording medium comprising a substrate film and a transfer part, comprising at least a receptive layer, provided separably on the substrate film is used, and, at the time of the transfer of the transfer part in the intermediate transfer recording medium onto an object, the transfer of the transfer part onto the object in its nontransfer region, onto which the transfer part should not be transferred, can be avoided without installing any special ancillary tool on an image forming apparatus. In the method for image formation, a thermal transfer sheet comprising a substrate and at least a peel-off layer provided on the substrate is provided. Further, an intermediate transfer recording medium comprising a substrate film and a transfer part, comprising at least a receptive layer, provided separably on the substrate film is provided. The thermal transfer sheet and the intermediate transfer recording medium are put on top of each other so that the peel-off layer in the thermal transfer sheet is brought into contact with the transfer part in the intermediate transfer recording medium. The assembly is heated to remove the transfer part in its predetermined region from the intermediate transfer recording medium. The transfer part is then retransferred from the intermediate transfer recording medium onto an object. That is, the transfer part in its predetermined region in the intermediate transfer recording medium is transferred onto the thermal transfer sheet side provided with the peel-off layer and is separated from the intermediate transfer recording medium side.
摘要:
A color thermal printer includes feeder rollers for feeding thermosensitive recording material through a feeding path. A thermal head operates for thermal recording of an image in a recording region of the recording material being fed. An unused region is defined outside the recording region. A photo fixer fixes the image on the recording material by application of ultraviolet or violet rays thereto. A liquid crystal shutter unit is disposed between the photo fixer and the recording material, and includes plural shutter segments. The plural shutter segments are arranged in a form of plural parallel lines, and changeable independently between an opaque state and a transparent state, and when in the opaque state, block the ultraviolet or violet rays, and when in the transparent state, cause the rays to pass. A controller controls the liquid crystal shutter unit in synchronism with the feeder rollers, sets at least one of the shutter segments in the transparent state if the at least one is opposed to the recording region in feeding of the recording material, and sets at least one of the shutter segments in the opaque state if the at least one is opposed to the unused region in feeding of the recording material.
摘要:
A separator abuts on a leading edge of a recording paper to separate it from a periphery of a paper roll when the paper roll is rotated forward in a paper feeding direction. The separator is attached to a supporting arm, which is urged by a spring so as to move the separator in accordance with a change of a diameter of the paper roll. The separator is provided with a vibration detecting sensor. While the paper roll is rotated backward in a winding direction, the vibration detecting sensor outputs a signal to a controller. This signal has a level corresponding to a scale of vibration. The controller detects the leading edge from the signal level when a head portion of the separator has overleapt the leading edge of the recording paper.
摘要:
A method of producing screen data for imaging units of a printing machine includes the steps of breaking down raw image data into a plurality of partial images, respectively, corresponding to one printing ink; outputting the partial images to a plurality of screen processors, respectively, corresponding to the number of colors to the printed; and processing the partial images simultaneously for forming screen data by the screen processors for output to a respective one of the imaging units; and a system for performing the method.