Electrophotography – Image formation – Fixing
Patent
1998-07-22
1999-11-30
Royer, William
Electrophotography
Image formation
Fixing
118260, G03G 1520
Patent
active
059957980
ABSTRACT:
Featured is a fixing device provided in an image forming device that includes a heat roll, a pressurization roll, an application member and a blade member. The heat roll has a surface that is heated to a desired temperature by a heating source and the pressurization roll presses a recorded medium (e.g., a paper sheet) holding an unfixed image to the heat roll. In this way, the unfixed image is fixed to the recorded medium by passing it between the heat roll and pressurization roll. The application member applies a release agent to the heat roll for preventing adherence of the unfixed image held on the recorded medium to the heat roll, where the release agent is impregnated to the application member and applied to the heat roll by capillary action. The blade member controls the application of the release agent so it is uniformly applied to the heat roll and removes excessive release agent to be applied on the heat roll. The application and blade members are positioned so that opposing end surfaces are adjacent to each other. In a more particular embodiment, the blade member is positioned adjacent a tip of the capillary of the application member. This advantageously results in suppressing a remaining release agent upstream of the blade member by the application member and automatically controlling the amount of the release agent carried up by the application member. In this way, the application region in the tip portion of the application member is in a saturated state and the excessive supply of the release agent is limited, which leads to stabilization of the supply quantity and the prevention of excessive release agent. Additionally, such an arrangement also prevents the dripping of the excessive release agent when applying the release agent.
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Horinaka Hajime
Ochi Norihiro
Yoshimura Hisashi
Chen Sophia S.
Conlin David G.
Daley, Jr. William J.
Royer William
Sharp Kabushiki Kaisha
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