Abstract:
A flash fixing device comprises a first and second flash lamps that emit flashes of light that fix a toner image transferred onto a recording medium and a light emission control unit that controls the light emissions of the first and second flash lamps so that the light flashes emitted from the first flash lamp and the second flash lamp are each irradiated at different timing on each portion on the recording medium.
Abstract:
A flash fixing apparatus including a plurality of lamp groups each comprising at least one lamp, and an emission controller. The lamp groups illuminate flashes at a recording medium to fix a toner image which has been transferred to the recording medium. The emission controller causes the respective lamp groups to emit light with different emission timings, and alters the emission timings in accordance with the toner of the toner image and physical characteristics of the recording medium.
Abstract:
An image-forming process for forming a full-color image including: forming a full-color toner image by supplying at least a cyan toner, a magenta toner, and a yellow toner onto a recording medium; and fixing the toner image on the recording medium by flash fusing, wherein each of the cyan toner, the magenta toner and the yellow toner contains an infrared absorbent, the cyan toner is supplied so that out of the cyan toner, the magenta toner and the yellow toner, the cyan toner is positioned in the uppermost layer in areas of the toner image where cyan toner is present, and the flash fusing is performed by a delayed light emission process wherein a plurality of flash lamps emit lights at a time interval.
Abstract:
A flash fixing device configured to fix a toner image by a flash light, includes a plurality of flash lamps arranged parallel to each other, and a reflection board including a plurality of side part reflection surfaces each facing from a side to the respective flash lamps, wherein in a case where a surface including two central axes of the two flash lamps arranged one at each end is defined as a standard surface, an acute angle against the standard surface is set to be decreased as the side part reflection surface is positioned closer to a center of the arrangement of the plurality of the flash lamps.
Abstract:
Flash fixing equipment for fixing a toner image onto a medium by means of flashlight is to reduce non-uniformity of halftone image print density. Flash fixing unit has flash energy distribution consisting of a center zone and front/end zones. The flash frequency of the flash lamp is controlled so that the toner fixing start energy being subtracted from the added value of flash energies of front and end zones becomes substantially equal to the flash energy value on the center zone. The energy distribution exceeding the fixing start energy which affects print density (size of toner-overflowed area) is controlled to have a flat characteristic to reduce non-uniformity of print density.
Abstract:
A flash device includes a DC power supply, a flash lamp, and a plurality of charge/discharge elements, which are charged via a charging path by the DC power supply and discharge electric charge via a discharging path to the flash lamp. A first switch selectively establishes (a) a parallel state in which the charge/discharge elements are connected in parallel with one another, and connected to the DC power supply via the charging path and (b) a series state in which the charge/discharge elements are connected in series with the flash lamp via the discharging path, and connected in series with one another. A second switch is positioned in the charging path between the DC power supply and the charge/discharge elements, and selectively connects and disconnects the charge/discharge elements to and from the DC power supply. A controller has the second switch perform connection and has the first switch establish the parallel state to have the charge/discharge elements charged. The controller has the second switch perform disconnection and has the first switch establish the series state to have the flash lamp emit light.
Abstract:
A toner image fixing device is disposed above a passageway along which a sheet of paper carrying toner images recorded thereon is moved, and has a lamp for emitting heat-radiation toward the sheet of paper to thermally fuse and fix the toner images thereon. Emission of the heat-radiation from the lamp is controlled such that the energy of the heat-radiation, to which a high-density toner image zone of the sheet of paper is subjected, is smaller than that of the heat-radiation to which a low-density toner image zone of the sheet of paper is subjected, to thereby prevent undulation of the sheet of paper. Where two-sided recording is applied to the sheet of paper, the prevention of undulation of the sheet of paper is especially significant because then the two-sided recording can be properly carried out.
Abstract:
The flash units are housed in reflector assemblies and actuated in a sequence that entirely exposes both sides of the sheet while drawing a constant amount of electrical power. Constructions of the reflector include an extruded housing, snap-in replaceable reflector surfaces, and a manifold structure that achieves cooling, fume scavenging and paper flattening. In one embodiment a two-sided sheet moves past a pair of oppositely directed flash units which are powered by a single power supply. A specularly reflective surface provides a level of reflected illumination which complements the light received directly from the flash tube to provide a constant level of illumination and fuse a toned image.
Abstract:
In an electrophotographic/electrostatic recording apparatus especially for high speed recording, a toner image on a recording sheet is fused thereon by a flash lamp in a fixing unit, and smoke is generated thereby. Smoke and toner dust in the ambient air should be removed before it is exhausted out of the apparatus by drawing the air through an air filter. The invention discloses that is it effective to use an air filter structure comprising a plurality of filter units, wherein a first filter unit made of electrostatically charged fibrous material is utilized at the inlet side of the air filter. The first filter unit has a comparatively greater porosity and attracts and removes toner particles charged with the opposite polarity to that of the electrostatically charged fibrous material. Therefore, the air, a substantial part of toner dust being removed therefrom, can more easily enter into the following filter units for removal of smoke, resulting in increased endurance of the air filter.
Abstract:
A copying machine equipped with a flash type fixing apparatus includes at least two light shielding shutters adapted to prevent a light resulting from flashing of the flash type fixing apparatus from reaching a photosensitive layer through a conveying path between the photosensitive layer and the flash type fixing apparatus.