Hearth rolls for heating furnace and soaking furnace of vertical heat treating furnace and vertical heat treating furnace including hearth rolls
US6238209A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2000 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | May 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B9/28
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A vertical heat treating furnace for passing a metal strip, therethrough for heat treatment and a hearth roll applied to a heating/soaking furnace of the vertical heat treating furnace are disclosed. The hearth roll can be configured such that the taper angle of each of first taper sections continuous to a flat section at a central portion of the hearth roll from a roll axial direction is larger than the taper angle of each of second taper sections continuous to each of the first taper sections from the roll axial direction. The length Lc (mm) of the flat section and the length L1 (mm) of the first taper section can satisfy the following relationships: 0.5 Wmin.ltoreq.Lc.ltoreq.Wmin and Wmin.ltoreq.Lc+2.times.L1.ltoreq.Wmax-400, where Wmin is the minimum width (mm) of the metal strip, and Wmax is the maximum width (mm) of the metal strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.