Patent ID: 7466936
Filing Date: 2008-12-16
Classification: B41J,G03G

Abstract:
1. A laser printer apparatus, comprising: a pair of frames arranged opposite to each other; a base member fixed on each of said pair of frames and extending in one direction across said pair of frames; a laser scanning unit placed on said base member, directing a laser beam in accordance with a prescribed image signal; a fixing unit arranged aligned to a side in a direction approximately orthogonal to one direction of said base member, fixing the toner transferred to the sheet of paper; a fan arranged on one of said pair of frames at a position corresponding to an end along said one direction of said base member; a top cover arranged to cover said base member, said laser scanning unit said fixing unit and said fan; a raised portion provided on an end portion of said base member positioned on the side of said fixing unit, raised toward said top cover and extending in one direction; a plurality of opening portions formed in said raised portion along said one direction, each having a prescribed opening area; and a prescribed wall portion formed on said top cover to the side of said base member, and together with said raised portion, serving as an air passage; wherein said openings are formed such that opening area becomes larger as distance from said fan increases; and said wall portion is arranged such that a polygon motor in said laser scanning unit is positioned between said raised portion and said wall portion.