×

IMAGE FORMING APPARATUS

  • US 20120328314A1
  • Filed: 06/18/2012
  • Published: 12/27/2012
  • Est. Priority Date: 06/22/2011
  • Status: Active Grant
First Claim
Patent Images

1. An image forming apparatus, comprising:

  • an image forming device to form a toner image;

    a transfer device comprising;

    an intermediate transfer member having a surface to bear the toner image formed in the image forming device;

    a nip forming member to press against the intermediate transfer member to form a transfer nip between the intermediate transfer member and the nip forming member; and

    an electric potential difference generator to generate an electric potential difference between the intermediate transfer member and the nip forming member,the transfer device transferring the toner image on the surface of the intermediate transfer member onto a recording sheet clamped in the transfer nip in a state in which the electric potential difference generator generates the electric potential difference between the intermediate transfer member and the nip forming member;

    a fixing device to fix the toner image on the recording sheet after the recording sheet is passed through the transfer nip;

    an inverting device to invert the recording sheet after the toner image is transferred and fixed onto a first side of the recording sheet upon passing through the transfer nip and the fixing device and to then transport the recording sheet to the transfer nip again; and

    a processor to cause the electric potential difference generator to generate a first electric potential difference containing only a direct current (DC) component when the toner image is transferred onto the first side of the recording sheet, and to generate a second electric potential difference containing a DC component and a superimposed alternating current (AC) component when the toner image is transferred onto a second side of the recording sheet,wherein the second electric potential difference has an averaged absolute value per unit of time smaller than an absolute value of the first electric potential difference.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×