DEVELOPING CARTRIDGE WITH SEALING ELEMENT Russian patent published in 2020 - IPC G03G15/08 

FIELD: physics.

SUBSTANCE: claimed group of inventions relates to the field of electrophotography. Disclosed group of inventions includes versions of developing cartridges detachable from main body of image forming device. Developing cartridge comprises: a light-sensitive drum on which a latent electrostatic image is formed, a cleaning element for removing spent toner from the surface of the photosensitive drum, side sealing element for waste toner, which contacts with end part of light-sensitive drum in longitudinal direction of photosensitive drum, to prevent leakage of waste toner through end part of light-sensitive drum and light-sensitive frame, containing: a waste toner container for storing waste toner, a first attachment surface to which a side sealing member for waste toner is attached and a side wall for forming a boundary on the upstream side of the first attachment surface relative to the direction of rotation of the photosensitive drum, wherein the side sealing member for waste toner includes an opposite surface facing the side wall, and a projection protruding to the side wall is provided on the opposite surface.

EFFECT: technical result consists in prevention of waste toner leakage.

15 cl, 13 dwg