US 9,811,028 B2
Image forming apparatus, image forming system and image forming method
Keisuke Oura, Hino (JP); Erika Sawada, Ebina (JP); Shigetaka Kurosu, Hino (JP); and Yoshitada Karimai, Hachioji (JP)
Assigned to KONICA MINOLTA, INC., Tokyo (JP)
Filed by Konica Minolta, Inc., Tokyo (JP)
Filed on Nov. 9, 2016, as Appl. No. 15/346,895.
Claims priority of application No. 2015-236202 (JP), filed on Dec. 3, 2015.
Prior Publication US 2017/0160680 A1, Jun. 8, 2017
Int. Cl. G03G 15/16 (2006.01)
CPC G03G 15/1615 (2013.01) [G03G 15/1675 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An image forming apparatus in which tension is applied to a recording medium during secondary transferring, comprising:
an image carrier;
a first rotating member which comes in contact with the image carrier;
a second rotating member which sandwiches the image carrier with the first rotating member to form a nip;
a tension releasing device which releases the tension;
a voltage applier which applies a voltage between the first rotating member and the second rotating member at a predetermined constant current;
a voltage measuring device which measures the voltage applied by the voltage applier;
a nip width adjuster which adjusts a width of the nip;
and
a controller which controls the nip width adjuster so that a difference between a first voltage which is measured in a state where the tension releasing device is controlled to release the tension applied to the recording medium and a second voltage which is measured in a state where the tension is applied to the recording medium be within a predetermined range, the first voltage and the second voltage being measured by the voltage measuring device.