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    • 4. 发明授权
    • Image forming apparatus having a device for measuring an original density
    • 具有用于测量原始密度的装置的图像形成装置
    • US5134438A
    • 1992-07-28
    • US769386
    • 1991-10-01
    • Naoki Nakashima
    • Naoki Nakashima
    • G03G15/04G03B27/72G03G15/00G03G15/043
    • G03G15/5025G03G15/043
    • An image forming apparatus is provided with an original density detecting device for detecting the original density, and output characteristic switching device for switching the output characteristic relative to the original density detected by the original density detecting device to a plurality of types of predetermined output characteristics. The original density is found on the basis of a predetermined output characteristic out of the plurality of output characteristics of the original density detecting device and an output of the original density detecting device. Then, an output characteristic showing a high rate of change in the vicinity of the original density found by the first original density measuring device out of the plurality of output characteristics is selected by selecting device. When the selected output characteristic is different from the output characteristic used for measuring the original density by the first original density measuring device, the output characteristic of the original density detecting device is switched to the selected output characteristic, and the original density is found on the basis of the selected output characteristic and the output of the original density detecting device by second original density measuring device.
    • 5. 发明授权
    • Paper feeding device
    • 送纸装置
    • US5423528A
    • 1995-06-13
    • US160188
    • 1993-12-02
    • Katsuyuki TeranishiToshiyuki NakamuraNaoki Nakashima
    • Katsuyuki TeranishiToshiyuki NakamuraNaoki Nakashima
    • B65H3/06B65H7/18G03G15/00B65H7/08
    • B65H3/0607B65H2511/212B65H2511/52
    • A paper feeding device for taking out paper sheets contained in a paper containing section one at a time by a paper feeding roller to feed the paper sheets. When a paper jam occurs in the position of the paper feeding roller, the rotation in one direction of the paper feeding roller is continued, so that the paper feeding roller is returned to its home position. At the time when the paper feeding roller is returned to its home position, the rotation of the paper feeding roller is stopped, to prepare for paper jam processing. A nip portion which nips the paper sheet and a non-nip portion spaced apart from the paper sheet are located on an outer peripheral surface of the paper feeding roller. In the home position, the nip portion is not opposed to the paper sheet and the non-nip portion is opposed to the paper sheet. That is, when a paper jam occurs, the paper feeding roller is stopped in a state where it is not pressed against the paper sheet in the paper containing section.
    • 一种供纸装置,用于通过供纸辊一次取出容纳在纸容纳部分中的纸张以供纸。 当在给纸辊的位置发生卡纸时,继续进给辊的一个方向的旋转,使供纸辊返回其原位。 当送纸辊返回原位时,停止进给辊的转动,以防止卡纸处理。 夹在纸张上的夹持部分和与纸张间隔开的非压合部分位于送纸辊的外周表面上。 在原始位置,夹持部不与纸张相对,并且非压合部分与纸张相对。 也就是说,当卡纸发生时,在不在纸容纳部分中的纸张上的状态下,送纸辊停止。