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    • 2. 发明授权
    • Magnetic recording and reproducing apparatus automatically adjustable to
each individual magnetic tape
    • 磁记录和再现设备可以自动调整到每个单独的磁带
    • US4422109A
    • 1983-12-20
    • US390884
    • 1982-06-22
    • Tohru SampeiNaoya FujitaShigemitsu HiguchiMasamichi YamadaKohichi Tomatsuri
    • Tohru SampeiNaoya FujitaShigemitsu HiguchiMasamichi YamadaKohichi Tomatsuri
    • G11B5/02G11B5/035G11B23/00H03G5/00G11B5/45G11B5/47
    • G11B23/0007G11B5/02G11B5/035H03G5/00
    • A magnetic recording and reproducing apparatus comprises a source for producing test signals, a variable-gain amplifier, an equalizer, a recording bias generating circuit, a control unit for supplying control signals to the amplifier, equalizer and recording bias generating circuit, a memory and an operating circuit unit. The apparatus is automatically adjusted to each individual magnetic tape in use in such a manner that: a first test signal from the source is recorded on a magnetic tape with a preset bias control signal, the recorded first test signal is reproduced, the bias control signal is adjusted to provide a maximum HF saturation level and a minimum distortion to thereby determine an optimum bias control signal, and the proper bias control signal is fixed for said bias generating circuit; another test signal from the source is recorded on the magnetic tape with a preset gain control signal, the recorded other test signal is reproduced and is compared with a reference value at the operating circuit unit to provide an error signal, and the resulting error signal is fed through the memory to the control unit to renew the preset gain control signal for said amplifier. The adjustment of the frequency response control signal for the equalizer is effected in the same manner as the adjustment of the gain control signal.
    • 磁记录和再现装置包括用于产生测试信号的源,可变增益放大器,均衡器,记录偏置产生电路,用于向放大器提供控制信号的控制单元,均衡器和记录偏置产生电路,存储器和 一个操作电路单元。 该装置在使用中被自动调整到每个单独的磁带,使得:来自源的第一测试信号被记录在具有预设偏置控制信号的磁带上,记录的第一测试信号被再现,偏置控制信号 被调整以提供最大HF饱和电平和最小失真,从而确定最佳偏置控制信号,并且对于所述偏置发生电路固定适当的偏置控制信号; 来自源的另一个测试信号用预设的增益控制信号记录在磁带上,记录的其它测试信号被再现,并与操作电路单元处的参考值进行比较以提供误差信号,并且所得到的误差信号为 通过存储器馈送到控制单元以更新用于所述放大器的预设增益控制信号。 均衡器的频率响应控制信号的调整以与增益控制信号的调整相同的方式进行。
    • 10. 发明授权
    • Fixing device and image forming apparatus including same
    • 固定装置及其成像装置
    • US08909074B2
    • 2014-12-09
    • US13029648
    • 2011-02-17
    • Masamichi Yamada
    • Masamichi Yamada
    • G03G15/20
    • G03G15/2085G03G15/2028G03G15/206
    • A fixing device for fixing a toner image on a recording medium includes a fixing roller, a pressing roller, and at least one of a sheet guide, a sheet separation plate, and an electric component module. The fixing roller rotates in a predetermined direction of rotation. The pressing roller rotates and contacts an outer circumferential surface of the fixing roller to form a nip between the pressing roller and the fixing roller through which the recording medium bearing the toner image passes to fix the toner image by heat and pressure. The position of the pressing roller is changeable relative to the fixing roller. At least one of the sheet guide, the separation plate, and the electric component module moves in conjunction with movement of the pressing roller as a single integrated unit without changing relative positions with respect to the pressing roller.
    • 用于将调色剂图像定影在记录介质上的定影装置包括定影辊,加压辊,以及片材引导件,片材分离板和电气部件模块中的至少一个。 定影辊沿预定的旋转方向旋转。 压辊旋转并接触定影辊的外圆周表面,以在压辊和定影辊之间形成辊隙,通过该定影辊,承载调色剂图像的记录介质通过该定影辊通过热和压力来固定调色剂图像。 加压辊的位置相对于定影辊是可变的。 片材引导件,分离板和电气部件模块中的至少一个与作为单个集成单元的加压辊的移动一起移动,而不改变相对于加压辊的相对位置。