Patent ID: 9086677
Filing Date: 2015-07-21
Classification: G03G

Abstract:
1. A developing cartridge comprising: a developing roller configured to rotate about a developing roller axis; a supply roller configured to rotate about a supply roller axis extending parallel to the developing roller axis, wherein the supply roller is configured to supply developer to the developing roller; a developing gear connected to and rotatable with the developing roller; a supply gear connected to and rotatable with the supply roller; a coupling member configured to receive driving force; a first gear rotatable with the coupling member and configured to be meshed with the developing gear, wherein the first gear has a first helical tooth pattern on a circumferential surface thereof, the first helical tooth pattern having tooth traces following first helix pitches, and a second gear rotatable with the coupling member and configured to be meshed with the supply gear, wherein the second gear has a second helical tooth pattern on a circumferential surface thereof, the second helical tooth pattern having tooth traces following second helix pitches in a direction opposite to a direction of the first helix pitches.