Image heating apparatus and conveying roller for use therein
US7251447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2005 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Jun 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/2067
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image heating apparatus for heating an image formed on a recording material, the apparatus including a conveying roller for conveying a recording material, the conveying roller including a metal core and an elastic layer provided outside the metal core, wherein the metal core has, in a central portion in the longitudinal direction thereof, a straight shape area having a substantially uniform diameter along the longitudinal direction and tapered shape areas, on both sides of the straight shape area, in which a diameter gradually decreases toward ends in the longitudinal direction, and wherein the elastic layer has, in a central portion in the longitudinal direction thereof, a straight shape area having a substantially uniform diameter along the longitudinal direction and inverted crown shape areas, on both sides of the straight shape area, in which a diameter gradually increases toward ends in the longitudinal direction. This configuration allows to prevent defects in image heating while suppressing creases in the recording material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.