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:
May. 01, 1990
Filed:
Aug. 16, 1988
Katsuhiko Takeda, Osaka, JP;
Hisashi Myochin, Osaka, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An image forming apparatus has a corona discharge device for transferring a toner image formed on a photosensitive member onto paper and a suction fan for drawing air from the inside of the corona discharge device to exhaust ozone. The corona discharge device has a wire electrode, a shield member surrounding the wire electrode including a lower portion located on the opposite side to the photosensitive member with respect to the wire electrode and a pair of side portions extending from the respective side edges of the lower portion toward the photosensitive member, and a cover member located between the photosensitive member and the wire electrode and extending downstream from the upstream side of the wire electrode with respect to the direction of transport of the paper to cover a part of the upper side of the wire electrode, the remaining part of the upper side of the wire electrode being used for transferring the toner image by corona discharge. The shield member is formed with a first opening in the lower portion for drawing air therethrough, and a second opening in one of the side portions at a position near the photosensitive member. With the above arrangement, air flows through the remaining part of the upper side of the wire electrode and also through the second opening into the corona discharge device and then flows out through the first opening by being drawn by the suction fan.