Patent ID: 7366449
Filing Date: 2008-04-29
Classification: G03G

Abstract:
1. A developing unit comprising: a developer carrying member that is in the form of a roller and that carries a first developer that contains a toner and a carrier; a developer container that includes an opening and holds the first developer; a developer controlling member that controls an amount of a second developer that is a part of the first developer to be supplied from the developer container to the developer carrying member; a first conveying member that is in the form of a roller, that is rotatably arranged in the developer container and substantially parallel to the developer carrying member, and that stirs and conveys the first developer in the developer container to the developer carrying member; a second conveying member that is in the form of a roller, that is rotatably arranged in the developer container and substantially parallel to the first conveying member, and that stirs and conveys the first developer to a direction opposite to a direction to which the first conveying member conveys the first developer; and a partition wall arranged between the first conveying member and the second conveying member, wherein the partition wall includes a guiding member that guides, to a position within a range in which rotation of the first conveying member reaches, a third developer that is a part of the second developer returned after being used for development from the developer carrying member, and the developing unit includes a sealing member for sealing the opening and adhered to at least a part of the guiding member.