Three roll fuser
Patent 5209997 Issued on May 11, 1993. Estimated Expiration Date: 
November 18, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 18, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectrophotographic fixing device Roll fuser apparatus and release agent metering system therefor Method of fixing heat-fusible toner images formed on a web Fixing device for fixing a powder image on a receiving sheet Fixing apparatus and method of controlling temperature of the same Patent #: 4977431 InventorsAssigneeApplicationNo. 793751 filed on 11/18/1991US Classes:430/99, Fixing image by heated metal roller399/330, Heated roller430/124Fixing imageExaminersPrimary: Martin, RolandForeign Patent References
International ClassesG03G 013/20G03G 015/20 AbstractA three roll fuser incuding a fuser roll, pressure roll and a backup roll. The backup roll is crowned and is supported in pressure engagement with the fuser roll to form a first nip while the fuser roll is also supported in contact with the pressure roll. The pressure engagement of the crowned roll with the fuser roll eliminates nonuniform nip loading in wide fusers as well as providing uniform velocity through the fuser roll/pressure roll nip. |
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