Patent ID: 8731446
Filing Date: 2014-05-20
Classification: G03G

Abstract:
1. A developer supply device configured to supply charged development agent to an intended device, comprising: a developer carrying body comprising a developer carrying surface that is configured to carry the development agent thereon, formed as a cylindrical circumferential surface parallel to a first direction, and disposed to face the intended device in a first position where the development agent held on the developer carrying surface is supplied to the intended device, wherein the developer carrying body is configured to rotate around an axis parallel to the first direction such that the developer carrying surface moves in a second direction perpendicular to the first direction; a casing comprising: a first transfer board housed in the casing so as to face the developer carrying surface in a second position, the second position, where the developer carrying surface faces an inside of the casing, being located upstream relative to the first position in the second direction, wherein the first transfer board is configured to: an electrification member disposed to face the developer carrying surface in a third position that is located downstream relative to the second position and upstream relative to the first position in the second direction, wherein the electrification member is configured to further charge the development agent supplied onto the developer carrying surface in the third position with an alternating electric field generated between the developer carrying body and the electrification member; a second transfer board that is supported by an inner wall surface of the casing so as to face the developer carrying surface in a fourth position that is located downstream relative to the first position and upstream relative to the second position in the second direction, wherein the second transfer board is configured to transfer the development agent to the developer storage section in a direction identical to the second direction in the fourth position, with a traveling-wave electric field generated when a multi-phase alternating-current voltage is applied to the second transfer board; and a shield member disposed between the second position and the electrification member.