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    • 9. 发明授权
    • Sheet conveying apparatus and sheet conveying method
    • 片材输送装置和片材输送方法
    • US08181957B2
    • 2012-05-22
    • US12409148
    • 2009-03-23
    • Hirofumi Kondo
    • Hirofumi Kondo
    • B65H7/02
    • B65H7/06B65H9/002B65H2511/242B65H2513/212B65H2553/412B65H2553/414B65H2553/612B65H2553/82B65H2701/1311B65H2701/1313B65H2220/02B65H2220/01B65H2220/03
    • To provide a sheet conveying technique that can realize highly accurate skew correction with an inexpensive and simple apparatus configuration. A sheet conveying apparatus includes: first and second rollers that are arranged in positions different from each other in a direction orthogonal to a sheet conveying direction and can be driven to rotate independently from each other; a first skew detecting unit that is arranged on an upstream side or a downstream side of the first and second rollers in the sheet conveying direction and detects skew of a sheet at first skew detection accuracy; and a second skew detecting unit that is arranged further on the downstream side than the first skew detecting unit in the sheet conveying direction and detects skew of the sheet at second skew detection accuracy higher than the first skew detection accuracy. A skew amount of the sheet is determined on the basis of detection results of the respective first and second skew detecting units. To reduce the determined skew amount, the first and second rollers are driven to rotate independently from each other and convey the sheet.
    • 提供一种能够以廉价且简单的装置配置实现高精度歪斜校正的片材输送技术。 片材输送装置包括:第一和第二辊,它们在与纸张输送方向正交的方向上彼此不同的位置布置,并且可被驱动以彼此独立地旋转; 第一偏斜检测单元,其布置在片材输送方向上的第一和第二辊的上游侧或下游侧,并且以第一倾斜检测精度检测片材的倾斜; 以及第二偏斜检测单元,其在片材输送方向上比第一偏斜检测单元进一步配置在下游侧,并且以比第一偏斜检测精度高的第二偏斜检测精度来检测纸张的偏斜。 基于相应的第一和第二偏斜检测单元的检测结果确定片材的偏斜量。 为了减少确定的偏斜量,第一和第二辊被驱动以彼此独立地旋转并输送片材。