The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 2014
Filed:
May. 17, 2011
Jun Matsumoto, Suntou-gun, JP;
Jun Matsumoto, Suntou-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member for bearing a toner image, a rotatable intermediary transfer member onto which the toner image is to be primary-transferred from the image bearing member, a contact member movable toward and away from the intermediary transfer member, a voltage applying unit for applying a voltage to the contact member, a current detecting circuit for detecting a current passing through the contact member, and a control portion for effecting control so that the contact member is in contact with or separated from the intermediary transfer member. The control portion can operate a measuring mode in which a contact time required to bring the contact member into contact with the intermediary transfer member is calculated by applying an initial voltage to the contact member, then by outputting a contact instruction signal to move the contact member to be in contact with the intermediary transfer member, and then by measuring a time from output of the contact instruction signal until the current detecting circuit detects a predetermined current value.