US Patent Issued to Canon on July 1 for "Image forming apparatus using plural test images formed with different test voltages" (Japanese Inventor)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,346,042, issued on July 1, was assigned to Canon K.K. (Tokyo).

"Image forming apparatus using plural test images formed with different test voltages" was invented by Taisuke Matsuura (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image forming apparatus includes an image bearing member, a transfer belt, a secondary transfer member, a voltage source, a current detecting portion, and a controller. The controller is operable in a first mode in which when a recording material is absent in a secondary transfer portion, a current flowing through the secondary transfer member under application of a first test voltage is detected by the curren...