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    • 7. 发明授权
    • Sheet feeding apparatus and two side image forming apparatus therewith
    • 送纸装置及其两侧成像装置
    • US5931455A
    • 1999-08-03
    • US962367
    • 1997-10-31
    • Susumu OkuiMakoto Tamura
    • Susumu OkuiMakoto Tamura
    • G03G15/00B65H1/08B65H1/14B65H3/68
    • B65H1/08
    • A sheet feeder for feeding a sheet from a sheet stacker. The sheet feeder includes: a main body of the sheet stacker for holding plural stacked sheets; a movable bottom plate, provided on the bottom portion of the main body and supported bivotally on an axis, for supporting the plural stacked sheets; a lifting lever for lifting the movable bottom plate; and plural pickup rollers, aligned on an axis in a direction perpendicular to a sheet feeding direction, for having a pressure contact with a sheet of the plural stacked sheets on the movable bottom plate, and for feeding the sheet from the main body in the sheet feeding direction. In the sheet feeder, a protruded portion is formed either on the movable bottom plate or on the lifting lever so that a contact portion where the movable bottom plate comes in contact with the lifting lever is of a point contact, and the contact portion is provided at the center of the closest two of the pickup rollers in the direction of their axis.
    • 用于从纸张堆垛机供给纸张的供纸器。 纸张供给器包括:用于保持多个堆叠的纸张的纸张堆垛机的主体; 可移动的底板,设置在主体的底部并且轴向支撑,用于支撑多个堆叠的片材; 用于提升可移动底板的提升杆; 以及多个拾取辊,其在与片材进给方向垂直的方向上的轴线上排列,用于与可移动底板上的多个堆叠片材的片材压力接触,并且用于将片材从主体供给到片材 喂养方向。 在供纸器中,在可移动底板或提升杆上形成突出部分,使得可移动底板与提升杆接触的接触部分是点接触的,并且提供接触部分 在最靠近两个拾取辊的轴线的中心。
    • 10. 发明授权
    • Process for preparing pitches
    • 制备勺子的方法
    • US5091072A
    • 1992-02-25
    • US504723
    • 1990-04-03
    • Masatoshi TsuchitaniMakoto TamuraKiyotaka SuzukiSjuji OkadaRyoichi NakajimaSakae Naito
    • Masatoshi TsuchitaniMakoto TamuraKiyotaka SuzukiSjuji OkadaRyoichi NakajimaSakae Naito
    • C10C1/00C10C3/00
    • C10C1/00C10C3/00
    • Commercially attractive continuous processes for the preparation of mesophase pitches for manufacturing high-performance carbon fibers are disclosed. One feature resides in that conversion of a pitch into a mesophase pitch is conducted continuously by using a unique continuous dispersion-heat-treating apparatus. The other feature resides in that the raw material for hydrogenation treatment which is a pretreatment preceeding to the final heat treatment for the production of a mesophase pitch, is prepared by using a heavy oil or pitch having substantially no BTX-insoluble material as the starting raw material, subjecting the raw material to a simple four-step treatment of (1) a continuous heat treatment in a tubular heater, (2) a distillation operation, (3) a BTX-solvent extraction and (4) a distillation operation; while recycling a soluble component obtained in the step (4) to the heat treatment of step (1) and recovering a BTX-solvent insoluble component formed in step (3) as the material for the hydrogenation treatment. This feature can provide a significant increase in the yield of a mesophase pitch. Furthermore, unexpectedly, the recycle of the soluble component into the heat treatment of step (1) is helpful to improve the characteristics of the ultimate products, i.e., carbon fibers or graphite fibers. Combination of the first and the second features, of course, can provide a better commercial success. In fact, the process of the present invention can provide a carbon fiber having a tensile strength of more than 300 kg/mm.sup.2 and a graphite fiber having a tensile strength of more than 400 kg/mm.sup.2 and a modulus of elasticity of no more than 60 ton/mm.sup.2. Processes with minor modifications to the above are also disclosed.