Patent ID: 8000629

Claim:
An image forming device comprising: a process cartridge comprising: a photosensitive drum rotatable about an axis in a rotational direction and defining an image transfer position where a toner is transferred to an electrostatic latent image area formed on the photosensitive drum; a charger disposed spaced away from the photosensitive drum for charging the photosensitive drum; and a frame formed with a first opening at a position opposite to the photosensitive drum with respect to the charger, the frame being also formed with a first vent hole for ventilation of a space defined by the frame, the first vent hole being positioned upstream of the first opening and downstream of the image transfer position of the photosensitive drum in the rotational direction of the photosensitive drum; a wall section positioned in direct confrontation with the first opening; and a flow restrictor that restricts air flow and provided between the frame and the wall section and between the first opening and the first vent hole.