复印机图文分离技术及应用

本文阐述了目前图文分离技术及其在复印机中的应用现状，提出了一种适合在复印机中应用的最佳阅值和穿越次数相结合的图文分离算法，给出了应用这种方法后取得的实际效果。     

抄表器死机故障分析及数据恢复

分析了抄表器死机的原因，并对抄表器死机后数据的恢复提出了具体的解决方法。     

碱水溶性成膜树脂的制备及性能考察

根据静电照相直接制版对光导材料的要求，以苯乙烯、丙烯酸、甲基丙烯酸为单体，按不同配比合成出成膜树脂Ｓｔ－ＡＡ和Ｓｔ－ＭＡＡ。通过分别测试它们的酸值、碱水溶解性和静电带电性，确定出当Ｓｔ与ＡＡ和Ｓｔ与ＭＡＡ配料的摩尔比在１．５∶１到１∶１之间时，成膜树脂的碱水溶解性较好，静电带电性能也较好。     

Thermally stimulated current measurements on a UV irradiated organic photoreceptor layer

Thermally stimulated current (TSC) measurements have been performed on a xerographic photoreceptor which has been treated with ultraviolet (UV) radiation. The charge transport layer of the photoreceptor consists of a polyester molecularly doped with an arylamine substituted hydrazone which was observed to undergo UV induced rearrangement to an indazole derivative. The indazole derivative is transparent to the wavelength component inducing the photo-reaction so that the depth of converted material gradually extends farther into the CTL with UV exposure time. The xerographic residual potential variation with irradiation time is attributed to the formation of a potential barrier to transfer of charge from hydrazone hopping states to indazole hopping states. The mobility activation energy obtained from TSC measurements is 0.22 eV for unirradiated material, which decreases to 0.12 eV after 1200 s of irradiation. The latter energy is identified as a signature of the potential barrier. This identification is corroborated by the correlation between the decrease of the residual potential and the increase of the TSC activation energy after 3600 s of irradiation.     

复印机进纸机构的动态分析和仿真研究

复印机的卡纸现象是影响复印速度的主要因素,卡纸问题也存在于传真机、ATM s、冲印机等介质传送系统中.为解决该问题,研究了复印机纸张在进纸机构中的动态行为,基于KONICA7045复印机的纸张进给机构,提出了纸张进给机构的几何模型并分析进给过程的接触力,利用多体系统动力学仿真软件RecurDyn,根据建立的复印机辊轮机构的几何模型,分析在此过程中纸张与胶辊之间的接触力,对不同进纸导轨角度的纸张运动速度进行仿真模拟.结果表明随着进纸导轨角度的增加,纸张进给平稳性下降,纸张容易发生卷曲,引发卡纸现象.     

Application of Wavelet Finite Element Method to Simulation of the Temperature Field of Copier Paper

Simulation of the temperature field of copier paper in copier fusing is very important for im-proving the fusing property of reprography.The temperature field of copier paper varies with a high gradient when the copier paper is moving through the fusing rollers.By means of conventional shaft elements,the high gradient temperature variety causes the oscillation of the numerical solution.Based on the Daubechies scaling functions,a kind of wavelet-based element is comstructed for the above prob-lem.The temperature field of the copier paper moving through the fusing rollers is simulated using the two methods.Comparison of the results shows the advantages of the wavelet finite element method,which provides a new method for improving the copier properties.     

聚合法制备静电复印彩粉的工艺与性能

试验采用特殊悬浮聚合工艺 ,可获得彩色静电复印机用色粉。主要讨论聚合彩粉的荷电性能 ,单体比例、分子量调节剂、剥离剂对聚合彩粉的影响。     

复印纸和激光打印纸的印刷参数对废纸脱墨的影响

介绍了印刷参数,如印刷速率和油墨熔化技术(包括熔化辊温度、熔化辊表面和加热座温度等)对废纸可脱墨性的影响的研究情况。结果认为印刷速率和熔化技术对废纸脱墨有重要的影响。     

以1—（2，4，7—三硝基）芴基—2，6—二甲基苯胺为电子传输材料的单层结构有机光导体的研究

系统地研究了在由1－（2，4，7－三硝基）芴基－2，6－二甲基苯胺（DMT－NF），4－（二乙氨基）－苯甲醛－1，1－二苯基腙（DEH）和Y晶型氧肽酞菁（Y－TiOPc)或非金属酞菁（H2Pc)构成的单层结构有机光导体的性能，考查了电荷产生材料（CGM）浓度、电场强度和CGM的种类对光导体静电照相性能的影响。研究结果表明，光导体的量子收率和感光度与CGM浓度有很大关系，正充电时随CGM的浓度的增加而增加，负充电时随CGM的浓度增加而降低。两种光导体在近红外光谱区表现出良好的光敏性，适合LD扫描成像。Y－TiOPc光导体的最高峰在780nm处，半衰曝光量为0.588μJ/cm^2（正充电），0.828μJ/cm^2(负充电）；H2Pc光导体正充电最高峰在800nm处，半衰曝光量为1.50μJ/cm^2，负充电最高峰在820nm处，半衰曝光量为1.97μJ/cm^2。     

新型联苯醌衍生物静电照相性能的研究

本研究合成了一系列联苯醌衍生物并对其结构进行确认,同时以合成的联苯醌衍生物作为电子传输材料(ETM)与空穴传输材料(HTM)、电荷产生材料(CGM)和成膜树脂进行匹配,制备了多组分掺杂的单层结构有机光导体.研究结果表明,光导体的感光度强烈地依赖于ETM的掺杂浓度,半衰曝光量首先随ETM浓度的增大而减小,在掺杂浓度为10%时降到最小,并趋于稳定.2,5,5′-三叔丁基联苯醌在所研究的联苯醌衍生物中性能最为优秀,在780 nm处半衰曝光量为2.2μJ/cm2.