Abstract:
Concentration detection of first and second toner particles in a dispersion, including illuminating the dispersion with linearly polarized light having a given polarization direction, detecting an amount of light passed through the dispersion and through an analyzer set at a predetermined angle to the given polarization direction and determining at least the concentration of one of the toner particles utilizing the detected amount of light. Additionally the concentration detection may include further illuminating the dispersion with unpolarized light, and further detecting a second amount of light passed through the dispersion illuminated with the unpolarized light, where both of the toner particle concentrations are determined from the detected and the second detected amounts of light.
Abstract:
Imaging apparatus for duplex printing on a substrate having first and second sides and a leading edge and a trailing edge, the imaging apparatus including a first member having an image support surface adapted to sequentially support first and second images thereon, a second member adapted to support the substrate such that one side of the substrate engages the image support surface, leading edge first, at a transfer region and transfer apparatus for transferring the first image from the image support surface to the first side of the substrate at the transfer region while at least partially fixing the image thereto. The imaging apparatus also includes a waiting station adjacent the second member for receiving the substrate after transfer of the first image thereto and prior to the transfer of the second image thereto and an output station for receiving the substrate after completion of image transfer thereto. The imaging apparatus includes deflector apparatus adjacent the second member operative to receive the substrate directly from the second member and selectably deflect the substrate towards the waiting station or the output station for delivery thereto and roller apparatus associated with the waiting station for selectably engaging the trailing edge of the substrate after the substrate has been delivered to the waiting station for delivering the substrate back to the second member. The second member is operative to deliver the substrate to the transfer region, whereat the second image is transferred to the second side of the substrate.
Abstract:
Imaging apparatus for printing an image on a substrate (42) from a latent image formed on a latent image bearing surface (16) including developing apparatus (22) for developing the latent image/with toner to form a developed toner image of a given size, a first intermediate transfer member (40) having a surface area large enough to accommodate the developed toner image, first transfer means for transferring the developed toner image from the latent image bearing surface (16) to the first intermediate transfer member (40), a second intermediate transfer member (47) having a surface area smaller than the surface area of the first intermediate transfer member (40), and second transfer means for transferring of said developed image from said first intermediate transfer member (40) to said second intermediate transfer member (47) and from said second intermediate transfer member (47) to said substrate (42). Preferably the second intermediate transfer means (47) is a cylinder having a diameter of less than 30 or 40 mm.
Abstract:
Imaging apparatus having an image forming surface (12) arranged for movement in a first direction and an image forming apparatus (16) for forming electrostatic latent image and background areas at respective first and second electrical potentials on the image forming surface (12), development apparatus (22) for developing the electrostatic latent image using a liquid developer including electrically charged toner particles to form a developed image, the development apparatus (22) comprising a development surface (38) maintained in a spaced apart relationship from the image forming surface (12) and moving in a direction opposite to the first direction, an additional surface (46) spaced from the image forming surface (12) for the removal of toner particles from the background areas and preferably moving in a direction opposite to the first direction, and apparatus (48) for supplying a liquid to at least a portion of the space between the image forming surface (12) and the additional surface (48).
Abstract:
A multicolor electrostatic imaging system has multicolor spray apparatus (14) for supplying a liquid toner of a selectable color to an electrostatic image. The spray means (14) has a multiplicity of spray outlets including a plurality of spray outlets distributed among the multiplicity of outlets, for supplying liquid toner of each of a plurality of colors. The apparatus utilizes a reverse development roller (17) and the spray apparatus (14) supplies the liquid developer to the region at which the reverse roller (17) leaves the development region.
Abstract:
A compact multi-beam laser scanning system having a large bandwidth which is capable of being modulated at a high information rate. The multi-beam laser scanning system is applicable to a wide format, high resolution, high speed electrophotographic printing process and comprises apparatus for producing a plurality of modulated laser beams; multiple beam combiner apparatus disposed so as to have each of the beams incident thereon for combining the plurality of modulated beams to provide a plurality of output beams which are commonly aligned in a plane and have a fixed angular separation therebetween; and deflection scanning and focusing apparatus for providing the commonly aligned and angularly separated output beams with a scanning motion on an image plane.
Abstract:
An imaging process including the steps of: sequentially forming a series of electrostatic latent images on a photoconductor surface; sequentially developing the series of electrostatic latent images with a plurality of toners at least one of which is unpigmented and at least one of which is pigmented to form a developed image; and transferring the developed image to a final substrate with the at least one unpigmented toner disposed uppermost thereon to form a layer enhancing the reflection of luminous flux from the image.
Abstract:
Imaging apparatus including an electrostatic imaging surface (10), latent image forming (16) apparatus for forming an electrostatic latent image on said electrostatic imaging surface (10) and development apparatus (22) for developing said electrostatic latent image which includes supply apparatus (20) for supplying a liquid toner to the image forming surface (10), the supply apparatus (20) including a multiplicity of independently controllable outlets (106), preferably spray outlets, and a development surface (38) for developing the electrostatic latent image using the liquid toner. The supply apparatus (20) is preferably a multi-color supply apparatus and the multiplicity of outlets (106) includes a plurality of the individually controllable outlets, for supplying liquid toner of each of a plurality of colors.
Abstract:
Liquid toner imaging apparatus including an image bearing surface (10) apparatus for developing an image on the image bearing surface using a liquid toner including carrier liquid and pigmented particles, and apparatus for transferring a developed image from the image bearing surface to a substrate. The apparatus for developing includes a developer electrode (17) having a developer surface, having a given width, portions of which sequentially comme into propinquity with the image bearing surface (10) and subsequently leave propinquity therewith, each region forming a development region (57) during its propinquity and a stationary nozzle (57) having a width substantially smaller than the width of the developer surface for providing liquid toner of a given color to the development region (57) by supplying liquid toner onto a portion of the developer electrode (17) wherein the nozzle (57) is spaced more than 8.4 mm from any any other nozzle (57) which supplies liquid toner of the given color to the development region (57).
Abstract:
An image having enhanced cohesiveness is provided by treating the image with heat, ultraviolet radiation or chemical agents prior to transfer of the image from a photoconductor. Treating the developped image improves the efficiency of transfer, reduces the amount of residue remaining on the photoconductor and enables high quality images on a wide variety of substrates to be obtained.