Image forming device with filming cleaning function

A method of removing film from the surface of a photosensitive drum that is in contact with a developing roller, the method comprising:

• starting rotation of the photosensitive drum while the developing roller is maintained in a non-rotating condition so that surface of the photosensitive drum rubs against the developing roller;
• subsequently starting rotation of the developing roller;
• and
• subsequently stopping rotation of the developing roller into a non-rotating condition so that surface of the still-rotating photosensitive drum rubs against the developing roller,
• wherein the step of subsequently stopping rotation of the developing roller is performed during a non-image forming period after a rear edge of a last sheet passes through a nip portion between the photosensitive drum and a transfer roller.

A method of removing film from the surface of a photosensitive drum that is in contact with a developing roller, the method comprising:

• starting rotation of the photosensitive drum and the developing roller substantially simultaneously;
• and
• subsequently stopping rotation of the developing roller to bring the developing roller into a non-rotating condition while maintaining the photosensitive drum in a rotating condition so that surface of the photosensitive drum rubs against the developing roller,
• wherein the step of subsequently stopping rotation of the developing roller is performed during a non-image forming period after a rear edge of a last sheet passes through a nip portion between the photosensitive drum and a transfer roller.

An image forming device comprising:

• a photosensitive drum adapted for supporting a static-electric latent image on its surface;
• a developing roller adapted to bear developer, the developing roller being disposed in confrontation and in contact with the surface of the photosensitive drum;
• a photosensitive drum driver that drives rotation of the photosensitive drum;
• a developing roller driver that drives rotation of the developing roller;
• a drive controller that controls the developing roller driver to stop driving the developing roller and maintain the developing roller in a non-rotating condition while controlling the photosensitive drum driver to drive the photosensitive drum to rotate, the drive controller also controlling the photosensitive drum driver to start rotation of the photosensitive drum when the developing roller is stopped;
• and
• a visible image transfer unit that transfers the visible image from the photosensitive drum onto another medium, the drive controller controlling, during a non-image forming period after the visible image transfer unit transfers the visible image from the photosensitive drum, the developing roller driver to stop driving first and then the photosensitive drum driver to stop driving,
• wherein the drive controller controls, from a condition wherein both the photosensitive drum driver and the developing roller driver are driving, the developing roller driver to stop driving, then the developing roller driver to again drive, then the photosensitive drum driver to stop driving and controls the developing roller driver to stop driving at a time, the time being one of simultaneously and afterward.

An image forming device comprising:

• a photosensitive drum adapted for supporting a static-electric latent image on its surface;
• a developing roller adapted to bear developer, the developing roller being disposed in confrontation and in contact with the surface of the photosensitive drum;
• a photosensitive drum driver that drives rotation of the photosensitive drum;
• a developing roller driver that drives rotation of the developing roller, the photosensitive drum and the developing roller being contactable with each other and separable from each other;
• and
• a drive controller that controls the developing roller driver to stop driving the developing roller and maintain the developing roller in a non-rotating condition while controlling the photosensitive drum driver to drive the photosensitive drum to rotate, the drive controller also controlling the photosensitive drum driver to start rotation of the photosensitive drum when the developing roller is stopped;
• the drive controller also controlling the photosensitive drum driver and the developing roller driver to rotate the photosensitive drum at least once while the developing roller and the photosensitive roller are in contact with each other and then to stop the rotation of the photosensitive drum after stopping rotation of the developing roller.

An image forming device, comprising:

• a photosensitive drum adapted for supporting a static-electric latent image on its surface;
• a developing roller adapted to bear developer, the developing roller being disposed in confrontation and in contact with the surface of the photosensitive drum;
• a photosensitive drum driver that drives rotation of the photosensitive drum;
• a developing roller driver that drives rotation of the developing roller, the photosensitive drum and the developing roller being contactable with each other and separable from each other;
• a drive controller that controls the developing roller driver to stop driving the developing roller and maintain the developing roller in a non-rotating condition while controlling the photosensitive drum driver to drive the photosensitive drum to rotate, the drive controller also controlling the photosensitive drum driver to start rotation of the photosensitive drum when the developing roller is stopped;
• the drive controller also controlling the photosensitive drum driver and the developing roller driver to start rotation of the developing roller after the photosensitive drum starts rotation and rotates at least once.

A method of removing film from the surface of a photosensitive drum that is in contact with a developing roller, the method comprising:

• starting rotation of the photosensitive drum and the developing roller substantially simultaneously;
• subsequently stopping rotation of the developing roller to bring the developing roller into a non-rotating condition while maintaining the photosensitive drum in a rotating condition so that surface of the photosensitive drum rubs against the developing roller;
• again starting rotation of the developing roller after the step of subsequently stopping rotation of the developing roller;
• and
• subsequently simultaneously stopping rotation of the photosensitive drum and the developing roller.