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US 9,851,664 B2Granted
Fixing device
AssigneeKYOCERA Document Solutions Inc.
InventorsYoshiharu Kanematsu, Eriko Hayashi
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AssigneeKYOCERA Document Solutions Inc.
InventorsYoshiharu Kanematsu, Eriko Hayashi
Estimating the term…
A fixing device includes a cylindrical heat roller, a heating element, a pressure roller, and an auxiliary roller. The heating element is provided inside the heat roller and configured to apply heat to the heat roller. The pressure roller is configured to be pressed against the heat roller to form, with the heat roller, a nip area where a recording paper sheet is to be nipped. The auxiliary roller is provided inside the heat roller and configured to be pressed toward the pressure roller with a peripheral wall of the heat roller in between. An outer peripheral surface of the auxiliary roller pressed against an inner peripheral surface of the heat roller is formed into an inverted crown shape so that an outside diameter of the auxiliary roller gradually decreases from both axial ends of the auxiliary roller toward an axial center thereof.
A fixing device comprising:
A fixing device comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Using contact heat: structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
Using contact heat: combined with pressure
Meandering prevention: using edge limitations
Shape of roller along rotational axis: concave
About 9 years 7 months of term left · ends 26 May 2036 (estimated)
This application claims priority to Japanese Patent Application No. 2015-119348 filed on Jun. 12, 2015, the entire contents of which are incorporated by reference herein.
The present disclosure relates to a fixing device configured to apply heat and pressure to an image formed on a recording paper sheet to fix the image thereon and an image forming apparatus.
Fixing devices are configured to press a heat roller and a pressure roller against each other to form a nip area between them and then nip a recording paper sheet in the nip area with the heat roller heated so that an image (unfixed toner image) on the recording paper sheet is fixed by the application of heat and pressure.
FIG. 1 is a front cross-sectional view showing the structure of an image forming apparatus to which a fixing device according to a first embodiment of the present disclosure is applied.
FIG. 2 is a perspective view showing the fixing device according to the first embodiment.
FIG. 3 is a side view showing the fixing device according to the first embodiment.
Hereinafter, a description will be given of embodiments of the present disclosure with reference to the drawings.
FIG. 1 is a front cross-sectional view showing the structure of an image forming apparatus to which a fixing device according to a first embodiment of the present disclosure is applied. This image forming apparatus 1 is a multifunction peripheral having a plurality of functions including, for example, a copy function, a print function, a scan function, and a facsimile function. The image forming apparatus 1 is made up so that an apparatus body 2 is provided with an image scanner unit (ISU) 5, an operating section 47, an image forming section 120, a fixing device 13 according to the first embodiment, a sheet feed section 14, and so on.
In performing an image forming operation, the image forming section 120 of the image forming apparatus 1 forms a toner image on a recording paper sheet P serving as a recording medium fed from the sheet feed section 14, based on image data generated by image scanning, image data received from a network-connected computer or a user terminal device, such as a smartphone, image data stored on an internal HDD, or other image data.