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    • 1. 发明授权
    • Curl correction device, and image forming apparatus having the curl correction device
    • 卷曲校正装置和具有卷曲校正装置的图像形成装置
    • US06619657B2
    • 2003-09-16
    • US09805175
    • 2001-03-14
    • Jun HorikoshiKenji Suzuki
    • Jun HorikoshiKenji Suzuki
    • B65H2970
    • B65H5/025
    • A sheet conveying device includes an endless belt for conveying a sheet, at least two stretching shafts arranged to revolvably stretch the endless belt, a rotatable pressing roller arranged to push the stretched endless belt from outside, the sheet being arranged to be conveyed in a state of being pinched between the endless belt and the pressing roller, and springs for pressing the pressing roller so as to make the pressing roller movable in a direction of being pushed to the endless belt and in a direction of being released from being pushed to the endless belt. Further, a curled-sheet correction device includes an endless belt arranged to circulate in a state of being wrapped around a plurality of guide rollers, and at least one curl correction roller arranged to press the endless belt in such a direction as to narrow a circulating area of the endless belt, wherein, among the plurality of guide rollers, a driving guide roller to which a rotative driving force is imparted is formed to have a straight generatrix, and curl of a curled sheet is corrected while the curled sheet is conveyed jointly by the endless belt and the curl correction roller.
    • 片材输送装置包括用于输送片材的环形带,布置成可旋转地拉伸环形带的至少两个拉伸轴,布置成从外部推动拉伸的环形带的可旋转的加压辊,该片材被布置成在一个状态下被输送 被夹在环形带和加压辊之间的弹簧,以及用于按压加压辊的弹簧,以使得加压辊能够沿被推动到环形带的方向上移动,并且在不被推到环形的方向上被释放 带。 此外,卷曲纸张校正装置包括环状带,其布置成以缠绕在多个导向辊上的状态循环;以及至少一个卷曲校正辊,布置成沿循环带按照使循环带的缩小的方向 其中,在多个导辊之间形成有施加旋转驱动力的驱动引导辊,以具有直母线,并且在卷曲的片材被共同传送的同时校正卷曲的片材的卷曲 通过环形皮带和卷曲矫正辊。
    • 8. 发明授权
    • Sheet decurling apparatus
    • 纸张卷曲消除装置
    • US06338481B1
    • 2002-01-15
    • US09525754
    • 2000-03-14
    • Noritoshi Maruchi
    • Noritoshi Maruchi
    • B65H2970
    • G03G15/6576B65H29/70G03G2215/00662
    • The rotation of the second conveyance rollers located downstream from the first conveyance rollers, which are located downstream from the thermal fixing device of the image forming apparatus, is stopped for a prescribed period of time, or the speed of the second conveyance rollers is made slower than that of the first conveyance rollers. A loop is formed in the sheet through this difference in rotation speed, and the curling of the sheet caused through the thermal fixing is corrected. A torque limiter (or one-way clutch) is mounted at least in the drive path for either the first or second conveyance path. When a rigid sheet such as thick paper or low-moisture paper—for which curling is not likely—is conveyed, slipping occurs in the drive path due to the rigidity of the sheet itself, and the loop formation is automatically cancelled. When a high-moisture thin sheet, in which curling is likely, is conveyed, no slipping occurs in the drive path and a loop in the opposite direction from the curling is formed, whereby the curling is reliably corrected.
    • 位于图像形成装置的热定影装置下游的位于第一输送辊下游的第二输送辊的旋转停止规定的时间,或者使第二输送辊的速度变慢 比第一输送辊。 通过这种旋转速度的差异在片材中形成环,并且校正通过热定影引起的片材的卷曲。 转矩限制器(或单向离合器)至少安装在用于第一或第二输送路径的驱动路径中。 当输送诸如厚纸或低湿度纸的刚性片材(其不可能卷曲)时,由于片材本身的刚性而在驱动路径中发生滑动,并且自动消除环形成。 当传送卷曲的高湿度薄片时,驱动路径中不会发生滑动,并且形成与卷曲相反的方向的环,从而可靠地校正卷曲。
    • 9. 发明授权
    • Sheet decurling apparatus
    • 纸张卷曲消除装置
    • US06246860B1
    • 2001-06-12
    • US09513849
    • 2000-02-25
    • Yoshiki Ohmichi
    • Yoshiki Ohmichi
    • B65H2970
    • G03G15/6576B65H29/60B65H2301/14B65H2301/51256B65H2511/13B65H2511/40B65H2513/42G03G2215/00447G03G2215/00497G03G2215/00662B65H2220/01B65H2220/02
    • In an electrophotographic image forming apparatus, curling occurs in the sheet when it passes through the thermal fixing device. The invention equips the apparatus with a decurling path having a decurling mechanism and a path without any such mechanism, as well as an alternating claw that guides the sheet to either of the paths, such that the alternating claw 9 alternates between the paths based on the settings for each sheet supply unit that supplies the sheets. The sheets from a sheet supply unit that requires decurling are guided to the decurling path and decurling is performed. On the other hand, sheets from a manual paper tray in which special types of paper, such as transparencies, are often placed are guided to the path without any decurling mechanism and no decurling is performed. Consequently, a sheet decurling apparatus that appropriately decurls the curling of plain paper only and does not perform decurling on special types of paper, such as thick paper or transparencies, may be realized without an increase in cost.
    • 在电子照相图像形成装置中,当片材通过热定影装置时,发生卷曲。 本发明为设备配备了具有卷曲消除机构和没有任何这种机构的路径的去卷曲路径,以及将纸张引导到任一路径的交替的爪,使得交替的爪9在路径之间基于 为每张供纸单元提供纸张的设置。 来自供纸单元的要求卷曲的纸张被引导到去卷曲路径并进行去卷曲。 另一方面,通常放置特殊类型的纸(例如透明胶片)的手动纸盘的纸张被引导到路径而没有任何去卷曲机构,并且不进行卷曲化。 因此,可以在不增加成本的情况下实现仅适当地卷曲普通纸卷曲并且不对诸如厚纸或透明胶片的特殊类型的纸进行卷曲消除的片材卷曲消除装置。