Rubber or plastic-coated roller, method and apparatus for production thereof
US4766843A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1986 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Aug 1, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1386
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention concerns particularly a rubber or plastic-coated roller such as a fixing roller to be used in a thermal fixing part of an electrophotographic copying machine, and a method and an apparatus for production thereof. It effects the production of the rubber or plastic-coated roller by placing a cylindrical mold upright, fitting into the lower part of the cylindrical mold a lower plug provided in the inside thereof with a tapered surface for guiding a core shaft and at the center thereof with a material injection hole, inserting into the cylindrical mold the core shaft having tapered surfaces one each the opposite ends thereof or the core shaft having tapered surface one each at the opposite ends thereof and covered with caps, fitting into the upper part of the cylindrical mold an upper plug provided in the inside thereof with a tapered surface for guiding the core shaft and at the center thereof with an air vent, injecting liquid rubber or plastic under pressure into the cylindrical mold via the material injection hold of the lower plug, and allowing the injected rubber or plastic to set. By this method, there is produced a coated roller the rubber or plastic layer of whi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.