摘要:
The present invention is an electrostatographic reproduction apparatus which includes a primary imaging member for producing an electrostatic latent image, a development station for applying toner particles to said latent image which forms a developed toner image, and a transfer station for transferring said developed toner image from the primary imaging member to a receiver. A fuser assembly is included for fixing the developed toner image to the receiver, to form a fused toner image on the receiver. An endless transport member is provided for transporting the receiver to or from the fuser assembly, the transport member having a substrate bearing an oil-absorbing porous layer that would tribocharge positively upon contact with negatively charged toner particles, and a porous overcoat outermost layer that does not tribocharge positively upon contact with negatively charged toner particles.
摘要:
The present invention is a method for the preparation of electrostatographic toner including the following steps. A polymer material is dissolved in an organic solvent to form an organic phase. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer and a salt including an anion selected from chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluromethylhydrate and a cation selected from aluminum, iron (III), tin (II) and zirconium (IV), to form a dispersion. The dispersion is homogenized. The organic solvent is evaporated from the dispersion and the resultant product is recovered, washed and dried. In an alternate method the salt is added directly to the dispersion.
摘要:
Hard magnetic core particles for use in the development of electrostatic latent images are produced by combining ferric oxide, a strontium oxide precursor, an oxygenated boron compound and a binder to form a mixture, wherein the strontium oxide precursor is preferably present in an amount that provides SrO in a molar amount that is in excess of a stoichiometric amount that provides a ratio of Fe2O3 to SrO of 6/1. The mixture can be formed into green beads and the green beads can be fired to form the hard magnetic core particles.
摘要翻译:通过组合氧化铁,氧化锶前体,氧化硼化合物和粘合剂以形成混合物来制备用于静电潜像显影用的硬磁芯颗粒,其中氧化锶前体优选以提供 SrO的摩尔量超过提供Fe 2 O 3与SrO的比率为6/1的化学计量量。 该混合物可以形成绿色珠粒,并且可以焙烧绿色珠粒以形成硬磁芯颗粒。
摘要:
A phosphor composition is disclosed containing a titanium activated hafnium zirconium germanate phosphor which emits electromagnetic radiation principally in the spectral region to which silver halide exhibits native sensitivity. To maximize the intensity of emission the ratio of host metals satisfies the relationship:D.sub.1+x Ge.sub.1-xwhereD is the combined sum of zirconium and halnium andx is 0.25 to -0.70.An X-ray intensifying screen is disclosed containing the phosphor composition.
摘要:
An intensifying screen for producing a latent image in a silver halide radiographic element when imagewise exposed to X-radiation is disclosed. The screen contains a phosphor having a hafnia host containing zirconia in concentrations higher than those found in optical grade hafnia. The phosphor can include as an activator one or a combination of titanium, rare earth, and alkali metal ions. Phosphor preparation processes are also disclosed.
摘要:
A phosphor composition is disclosed comprised of phosphor crystals which consist essentially of oxygen and a combination of metals satisfying the relationship:Li.sub.2 Hf.sub.1-x-y-z Zr.sub.z Sn.sub.y Ti.sub.x L.sub.wwhereL is at least one rare earth;w+x+y collectively are 0 to 0.2; andz is up to 0.2.The composition has utility in an intensifying screen for producing a latent image in a silver halide radiographic element when imagewise exposed to X-radiation.
摘要:
An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing indium ions or indium ions in combination with neodymium ions. Indium increases speed while reducing afterglow while the further addition of neodymium allows afterglow to be eliminated. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
摘要:
The use of electrographic printing to prepare prints which have a desired tactile feel or raised information in a controlled manner by utilizing a developer having toner particle size larger than 50 microns volume average diameter and carrier particles larger than the toner particle size such that the volume average distribution overlap between the toner distribution curve and carrier particle distribution curve is less than 35% and the carrier and toner particles have a volume average diameter size differential equal to or greater than 5 microns or the ratio of carrier-to-toner volume average diameter exceeds 1.25.
摘要:
The present invention is directed to surface treatment of toner particles and the toner developers used for the dry development of electrostatic charge images.
摘要:
The present invention is directed to surface treatment of toner particles and the toner developers used for the dry development of electrostatic charge images.