Apparatus for covering a metal roll core with a polymeric material, preferably a high performance thermoplastic material
US6435244B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Mar 20, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C13/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for covering a roll core with a polymeric material, preferably a high performance thermoplastic material, is disclosed. The method includes first providing a cylindrical roll core having two ends, a length, and an outer surface. A spacer assembly is attached proximate one end of the roll core, the spacer assembly having a circumference greater than that of the roll core. After preheating to a desired temperature, the roll core is then placed within an apparatus in a substantially vertical orientation and held therein by suitable fixtures, e.g., opposed universal chucks. A length of mold tape is helically wound over the length of the roll core in a spaced-apart relationship therewith to define an application zone between the mold tape and the roll core outer surface. A filament formed of the polymeric material is extruded within the application zone and helically wound over the roll core outer surface so that the roll core is covered with the material. Localized heating is applied to the roll core surface just prior to the application of the filament to improve bonding to the roll core surface. The mold tape acts as a supportive form to prevent sagging of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.