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    • 43. 发明授权
    • Transfer device and image forming apparatus including same
    • 转印装置和包括其的图像形成装置
    • US09235164B2
    • 2016-01-12
    • US14185242
    • 2014-02-20
    • Junichi IchikawaSeiichi KogureJunpei FujitaKazuki YogosawaKenji Sugiura
    • Junichi IchikawaSeiichi KogureJunpei FujitaKazuki YogosawaKenji Sugiura
    • G03G15/16
    • G03G15/1605G03G15/1615G03G2215/0129
    • A transfer device includes a nip forming member to contact a surface of an image bearing member to form a transfer nip therebetween, a pressing device, and a nip pressure changing device. The pressing device includes a plurality of elastic members, to produce a contact pressure between the nip forming member and the image bearing member according to a restoring force of at least one of the elastic members upon deformation of the elastic member. The nip pressure changing device changes an amount of elastic deformation of the elastic member between at least two stages to change a nip pressure of the transfer nip. While the contact pressure is produced by one of the elastic members, the nip pressure changing device changes the amount of elastic deformation of a different elastic member, different from the one that produces the contact pressure, to change the nip pressure of the transfer nip.
    • 转印装置包括用于接触图像承载部件的表面以在其间形成转印夹持部的压区形成部件,压紧装置和压区压力改变装置。 按压装置包括多个弹性构件,以在弹性构件变形时根据至少一个弹性构件的恢复力产生夹持形成构件和图像承载构件之间的接触压力。 辊隙压力改变装置在至少两个阶段之间改变弹性构件的弹性变形量,以改变转印辊隙的辊隙压力。 当接触压力由弹性部件之一产生时,辊隙压力改变装置改变不同于产生接触压力的弹性部件的弹性变形量,以改变转印辊隙的辊隙压力。