43 results about "Xerography" patented technology

Methods and apparatus for performing addressable fusing and/or heating of a substrate undergoing xerographic processing are disclosed. The apparatus includes a fuser having an array of addressable heating elements in radiative communication with a substrate through a fuser roll or fuser belt. The array of addressable heating elements is operated to selectively heat portions of the substrate to achieve a desired effect on the substrate, such as changing its surface finish, or fusing unfused toner to the substrate. In the case of toner fusing, the array is operated such that substantially only an area covered by the unfused toner is heated. This eliminates the need for blanket fusing, and generally provides for greater flexibility in xerographically processing substrates. Apparatus and methods for performing two-sided selective fusing and/or heating are also disclosed.

Xerographic micro-assembler systems and methods are disclosed. The systems and methods involve manipulating charge-encoded micro-objects. The charge encoding identifies each micro-object and specifies its orientation for sorting. The micro-objects are sorted in a sorting unit so that they have defined positions and orientations. The sorting unit has the capability of electrostatically and magnetically manipulating the micro-objects based on their select charge encoding. The sorted micro-objects are provided to an image transfer unit. The image transfer unit is adapted to receive the sorted micro-objects, maintain them in their sorted order and orientation, and deliver them to a substrate. Maintaining the sorted order as the micro-objects are delivered to the substrate may be accomplished through the use of an electrostatic image, as is done in xerography. The substrate with the micro-objects is further processed to interconnect the micro-objects—through electrical wiring, for example—to form the final micro-assembly.

This invention discovers a special pigment groom hectograph paper and its preparation. It utilizes the advantages of high yields machine pulp (PRC-APMP) and deink pulp (DIP) which is well thickness and green environment. That is optimizing pigment spreading formulation, optimizing pulp to materials ratio and its wet end chemical and copy making technique to reach the white value of all bleaching chemical pulp proportioning copy paper. The advantages of the products are: better printing adaptability, better relaxation thickness, better printing effect features compared with all chemical pulp hectograph paper. It's capable of producing top grade office and printing culture special pigment groom hectograph paper which is made according to different clients' requirement and selecting different optimized features' technique for different application such as laser printing, xerography and hectograph etc. So, it's capable of decreasing all chemical pulp quantity, saving wood, protecting forest, protecting environment from pollution.

Radiation curable overprint compositions containing a radiation curable oligomer/monomer, at least one photoinitiator, and at least one surfactant are disclosed. The overprint compositions are particularly well-suited for reducing or preventing document offset and for protecting xerographic images on substrates subjected to abrasives, heat, and/or sunlight since the compositions protect such images from cracking, fading, and smearing.

In a xerographic machine (10) having, a photoreceptor (110) including a photoconductive layer (112) arranged over an electrically conductive substrate (114), and a charging station (200) for applying a substantially uniform electrostatic charge to a surface (116) of the photoconductive layer (112), a method for detecting a thickness (t) of the photoconductive layer (112) is provided. The method includes: measuring an electrical property of the charging station (200); and, determining the thickness (t) of the photoconductive layer (112) from the measured electrical property.

A preparation method for catalyst coated membranes is to turn a slurry containing catalyst, proton exchange resin, hydrophone, solvent and SAA to powders then to transfer the powders onto the proton exchange membrane to prepare CCM by laser printing technology or xerography. The mass fractional relations of the components are: catalyst: proton exchange resin: hydrophone: solvent: SAA=10:2-5:50-1000:2-5:1-5, its size is smaller than 20mum, no swelling or deformation appear, thickness of CCM is 30-35 mum, the error is less than 10%, the thickness of the layer is less than 10mum and less than 5mum for single.

Disclosed is an image forming method for an electrophotographic photoreceptor, comprising: detecting a first streak in a first image; identifying the first streak location; shifting a charge device and marking a second image; identifying a second streak location; comparing the first streak location with the second streak location and determining a distance therebetween; on a first pass, charging a photoreceptor with the charge device; shifting the charge device from a first position to a second position along the photoreceptor corresponding to the distance; and, on a second pass, charging the photoreceptor with the charge device.

A method of forming a xerographic image having at least one portion with a gloss different from a gloss of another portion of the xerographic image includes xerographically forming a toner image on a surface of a substrate and forming a finish over the toner image at the at least on portion, the finish being made of a differential gloss finish coating material that has a gloss different from that of the toner image. The differential gloss finish coating material is preferably an emulsion aggregation toner that is substantially free of pigments that adversely affect the transparency of the toner following fusing, the toner having gloss tunability through control of the amount of crosslinked portions included in the toner.

In a xerographic development apparatus using a magnetic brush formed from magnetic carrier particles, a magnetic strip disposed downstream of the development zone along the direction of motion of the photoreceptor retains a separate, small brush of carrier particles near the photoreceptor. The brush acts as a barrier separating a flow of “dirty” air (laden with airborne toner particles) upstream of the strip, and a flow of clean air downstream of the strip.

The invention discloses a method for preparing colored toner used for laser printing and electrostatic copying. The invention combines with bulk polymerization, phase inversion polymerization, suspension polymerization technology and emulsion polymerization technology, and comprises the following steps: firstly, colorant and other additives are mixed with trace macromolecule, monomer and initiator completely for bulk polymerization for several hours, and aqueous phase solution which is dissolved with surfactant and dispersant is added to carry out the phase inversion and then polymerization is continuously carried out to obtain the product. The method obtains red, yellow and blue tricolor toner by polyreaction directly; the method has simple technology, less investment on equipment, energy saving and the uniform coloring of the product; and resin molecular weight shows bimodal distribution, thereby being good for fixation performance. The method overcomes the problem that unimodal distribution of the resin molecular weight causes poor fixation effect, uneasy even distribution of the colorant in the colored toner and over-wide particle size distribution during preparing the colored toner by the polymerization process.

The invention relates to a xerographic insulating dry single-component electropositive developer for an electrostatic xerographic printer, which comprises the following components in percentage by weight: 40 to 80 percent of adhesive resin, 20 to 60 percent of magnetic material, 1 to 8 percent of charge controlling agent, 0.1 to 0.8 percent of internal additive and 0.1 to 0.8 percent of external additive, wherein the adhesive resin adopts a styrene-acrylic acid copolymer with the polymerization rate of 70:25:5, the average molecular weight of 0.1 to 0.2 million and the melt index MI of 1.5 to 5.5; the magnetic material adopts ferroferric oxide, and has the average particle size of 0.1 to 2.0 mu m, and magnetic characteristics such as the saturation magnetization of 60 to 100 emv/g and the coercive force of 90 to 1400 e in the magnetic field of 10 Koe; and the charge controlling agent adopts an aniline black dye. The developer simplifies processing technique and reduces the production cost, and can xerox images which have high concentration and high resolution with less bottom ash.

A color image forming machine is provided having a plurality of xerographic marking engines, each forming associated color separations that are combined to produce a color print image. Each marking engine includes two independently controlled developers using toners of the same color and strength of color but with different fused gloss characteristics, in that one of the toners will produce a print with a comparatively lower gloss and the other will produce a print with a comparatively higher gloss, thereby providing a greater control over the range of the gloss of the output print.

The invention discloses an additional composite function material for an electrostatic developer. The additional composite function material is prepared by raw materials including, by weight, from 50 to 70 parts of magnetic powder, from 8 to 15 parts of silicon oil, from 1 to 5 parts of zinc stearate and from 10 to 15 parts of fumed silica, and the materials are sequentially fed into a high-speed mixer to be mixed according to the proportions, so that the additional composite function material is obtained. The additional composite function material is used for the electrostatic photocopying technology, can be used with single-component silica, effectively prevents a tone agent from being adhered with a photosensitive drum during usage, and solves the problem of hollow printed or photocopied images and texts. In addition, the problem of image rippling due to over thick tone agent accumulated on a magnetic roller can be accessorily solved when the additional composite function material is used in a magnetic single-component system, and the quantity of electricity of the tone agent can also be regulated.

Systems and methods are described that facilitate using TFT control of electronic discharge for surface potential reduction and latent image formation on an imaging member. Corona charging is performed to first create a background surface potential, followed by selective discharge of individual pixels using an array of TFTs to supply free charge carriers to reduce the electrostatic surface potential to nearly zero. This is followed by discharged area development (DAD) to develop the latent image on a print medium (e.g., paper). The described systems and methods do not require a HVPS to drive the backplane; therefore, the TFT matrix is electrostatically decoupled from the developer and other system components in direct contact with the imaging member. Accordingly, known addressing systems may be used to address the TFT array.

The invention relates to a preparation method for styrene-acrylic polyester resin, and belongs to the technical field of preparation of colorful powders for laser printing/xerography. The method comprises performing swelling polymerization reaction on styrene, an acrylate, polyester resin and an initiator under a supercritical condition, so as to prepare the styrene-acrylic polyester resin. The method is energy-saving, green and friendly to environment. Additionally, the styrene-acrylic polyester resin prepared by employing the method is electrically stable under high temperature and high humidity conditions, is low in photographic fixing temperature, and has good compatibility with a demolding agent.

A first bending part 204 of an agitator 200 is engaged by being inserted to a first engaging groove 104 and a second bending part 206 is inserted to a second engaging groove 106 in assembly of a toner cartridge. When inserted, an end surface 200A of the agitator 200 does not come into contact with the first engaging groove 104 or the second engaging groove 106 and does not come into contact with the bottom part 102a of a linking part 102 after being inserted. Since the agitator 200 is constituted from metal linear member, the foreign matter (shaved powder) is produced when the end surface 200A and the coupling part 100, consisting of resin, come into contact with each other and are abraded. However, since the end surface 200A of the agitator 200 does not come into contact with the first engaging groove 104 and the second engaging groove 106, no foreign matter (shaved powder) is produced in the assembly of tonor cartridge. Therefore, a problem of printing definition being reduced, etc., by having the foreign matter (shaved powder) produced by shaving in assembly and having this foreign matter (shaved powder) mixed into toner and being carried to a developing device does not occur.