PROCESS CARTRIDGE AND IMAGE FORMING DEVICE Russian patent published in 2020 - IPC G03G15/08 

FIELD: image forming devices.

SUBSTANCE: present invention relates to a process cartridge that is replaceable in an image forming apparatus and an image forming apparatus including a process cartridge. Claimed process cartridge comprises: (i) a photosensitive drum, (ii) a rotatable developing roller for developing an electrostatic latent image formed on the photosensitive drum, (iii) a rotatable toner feeding roller, which is provided in contact with said developing roller for feeding toner onto said developing roller, (iv) a toner holding chamber for holding toner, (v) a developing chamber in which said toner supply roller is located, (vi) a supply member provided in the toner chamber and rotatable for supplying toner from the toner chamber to the developing chamber, (vii) a driving force-receiving portion functionally connected to said toner feeding roller, wherein the driving force-receiving portion is configured to receive a driving force for rotating said toner supply roller, said developing roller and a supply member, (viii) a first driving force transmitting portion operatively connected to said toner feeding roller, wherein the first driving force transmitting portion is configured to transmit a driving force received by the driving force receiving portion to the developing roller and (ix) a second driving force transmitting portion operatively connected to said developing roller, wherein the second driving force transmitting portion is configured to transmit the driving force from the first driving force transmitting portion to the developing roller, wherein the process cartridge is configured such that when the driving force receiving portion receives the driving force and the process cartridge is oriented with the developing roller located above the toner chamber, (i) direction of rotation of said development roller is opposite to rotation direction of said toner feeding roller, (ii) part of surface of said toner feeding roller rotates from first position, in which part of surface of said toner feeding roller contacts with surface of said development roller, into second position, in which part of surface of said toner feeding roller is separated from surface of said development roller, wherein first position is higher than second position, (iii) the feeder supplies toner upward from the toner chamber into the developing chamber, and (iv) the surface speed of said toner feeding roller is greater than the surface speed of said developing roller.

EFFECT: technical result is to provide a process cartridge and an image forming device in which the developer is drawn from a developer-containing chamber provided below the developing chamber, to the developing chamber above the developer storing chamber providing reducing residual developer thus reducing the number of parts.

20 cl, 26 dwg