摘要:
A method of printing images, such as multicolor images, on two sides of a substrate including: (a) forming a first image on a first surface; (b) transferring the first image to a second surface from the first surface; (c) forming a second image on the first surface; (d) transferring the second image to a third surface from the first surface; and (e) simultaneously transferring the first and second images from the second and third surfaces to the two sides of a substrate. In an embodiment of the invention transferring the first image to the second surface includes transferring the first image from the first surface to the third surface and subsequently transferring it to the second surface.
摘要:
An imaging system including a movable electrostatic imaging surface, apparatus for providing an electrostatic image on the electrostatic image surface and a development electrode having a developer surface with contiguous portions in spaced relationship with the electrostatic imaging surface to form a development region. The system includes apparatus for moving the developer surface such that the contiguous portions of the developer surface sequentially enter the region at an entrance and leaves the development region at an exit, apparatus for moving the electrostatic imaging surface so that it enters the development region at the exit and leaves the region at the entrance and apparatus for providing a liquid developer of a selectable color to the development region at the exit. The system also includes apparatus for transferring the developed image to a substrate.
摘要:
A method for forming an image on a final substrate which includes forming a liquid toner image on a surface using a liquid developer comprising carrier liquid and charged tuner particles, electrostatically transferring the liquid toner image to an intermediate transfer member coated with a release coating and transferring the liquid toner image to a final substrate.
摘要:
Apparatus for detecting concentrations of colored toner particles in the presence of black or other absorbing toner particles including a light source, a light detector having a field of view of less than about .+-.10 degrees and preferably less than .+-.5 degrees, apparatus for supplying a dispersion of colored toner particles optionally containing undesirable contamination by black toner particles between the light source and the detector and computing circuitry operative for determining the concentration of the colored toner particles utilizing output from the light detector.
摘要:
Method and apparatus for transfer of a liquid toner image, containing carrier liquid and toner particles which solvate the carrier liquid at a solvation temperature above room temperature, from an image bearing surface to a substrate, the apparatus including an intermediate transfer member positioned in operative association with the image bearing surface, transferring the image from the image bearing surface onto the intermediate transfer member, and heating the image on the intermediate transfer member to a temperature above the solvation temperature, below the melting point of the toner particles and below the boiling point of the carrier liquid prior to transfer of the image to the substrate so as to cause the image to adhere to the substrate.
摘要:
A method of fusing and fixing a liquid toner image on a substrate. The image includes a carrier liquid and a non-volatile portion including thermoplastic toner particles which are plasticized by the carrier liquid at a predetermined temperature. The non-volatile portion of the liquid toner, in the absence of the carrier liquid, has a viscosity of not less than 2.times.10.sup.6 centipoise at a temperature of 122.+-.1.degree. C. The method includes fusing and fixing the toner image on the substrate by heating the toner image to at least the predetermined temperature while pressing the toner image against the substrate.
摘要:
An imaging process including the steps of forming an electrostatic image on a photoconductor surface, developing the electrostatic image with a liquid developer to form a developed image on the photoconductor surface, and transferring the developed image from the photoconductor surface to a final substrate. The cohesiveness of the developed image on the photoconductor surface is enhanced by the application of heat, ultraviolet radiation or a catalytic agent to the developed image on the photoconductor surface.
摘要:
An improved liquid toner composition for developing latent electrostatic images comprising toner particles, a release agent and a nonpolar dispersant liquid. An agent causing an apparent increase in the cohesivity of the toner particles may be included in the toner composition, or such agent may be used independently of the release agent in the toner composition.
摘要:
An imaging process which includes the steps of developing an image with liquid toner including a liquid carrier and toner particles, transferring the image to a substrate and fusing and fixing the image to the substrate by the application of energy and pressure, such that at least about 50% of the liquid carrier in the transferred image remains therein after fixing and fusing.
摘要:
A variable magnification electrophotographic copier wherein the ratio of object and image distances is changed by rotating a focusing device about an axis orthogonal to its optical axis. In a preferred embodiment, the focusing device is a refractive lens having a shape factor different from zero; the rotational axis intersects the optical axis; and the rotation angle is 180.degree. selectively to reverse the lens surfaces and provide images of two different magnifications each having minimum spherical aberration.