Mita Industrial Co., Ltd.

Naoki Motobayashi

Hideo Fukuda

Mikio Ido

Kiyonori Yamamoto

Hiroshi Ishida

Masahiko Kobayashi

Takehiko Okada

Tadakazu Ogiri

Shinsaku Yoneda

Yoshiyuki Ishizuka

An image-forming machine comprising a rotary drum and a cleaning means which removes the toner remaining on the peripheral surface of the rotary drum. The cleaning means includes a support member that extends in the direction of center axis of the rotary drum, a blade-holding member that is mounted on the upper surface of the support member and extends in the direction of center axis of the rotary drum, and a cleaning blade that is held by the blade-holding means and extends in the direction of center axis of the rotary drum. The blade-holding member is allowed to swing on the swing axis that extends in a plane which is substantially perpendicular to the center axis of the rotary drum. An acute angle .alpha. is defined between the cleaning blade and a tangential line of the drum at a portion where the front end of the cleaning blade that is pushed comes into contact with the peripheral surface of the rotary drum, on the downstream side as viewed in a direction in which the rotary drum rotates. Restriction members are attached to the support member at both ends thereof in the direction of the center axis, the restriction members having restriction portions opposed, while maintaining a very small gap x, to the upper surface of the blade-holding member in order to restrict both ends of the blade-holding member in the direction of center axis from being displaced in a direction to separate away from the upper surface of the support member.

Image-forming machine equipped with cleaning means

An image forming apparatus is provided with a photosensitive member; a charger including a corona ion generator and a grid electrode provided between the photosensitive member and the corona ion generator, and adapted for charging the surface of the photosensitive member while regulating the surface potential of the photosensitive member by the grid electrode; a current supply circuit connected to the charger and capable of supplying to the charger a first current not lower than a specified level for charging the surface of the photosensitive member at a first voltage at which an image of high contrast can be formed and a second current lower than the specified level for charging the surface of the photosensitive member at a second voltage at which an image having an intermediate gradation thereof emphasized is formed, the second voltage being lower than the first voltage; and a current switch circuit for switching the level of the current to be supplied to the charger means according to needs. Accordingly, a circuit construction of the charger can be simplified and the number of components thereof can be reduced, with the result that the price of the apparatus itself can be reduced.

Image forming apparatus capable of changing the surface potential of a

Toner cartridge

An electrophotographic copying machine developer vessel includes a vessel proper having a closed top, a barrel and a tapered inclined portion continuous to the barrel. The developer vessel also includes a receiving plate removably attachable to the vessel proper, the receiving plate having a substantially flat supporting surface, substantially straight two side edges for attachment to the developing device and an opening communicating with the vessel proper. An opening tab composed of a film which covers the opening of the receiving plate is peelably bonded to the flat supporting surface thereof. A shutter is provided which includes a plate having, on both the sides thereof, engagement portions to be engaged with both the side edges of the receiving plate. The shutter may engage the receiving plate of the developer vessel such that when the developer vessel is removed from a copying machine, the presence of the shutter thereunder prevents scattering of developer in the environment.

Vessel for developer

Growing community of inventors

Tondabayashi, Japan

Naoki Motobayashi