Stone roller
US4272873A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1979 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Apr 24, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F3/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The disclosure concerns a stone roller for use in a paper making machine as a pressure roller, or for other like uses. The stone roller may be comprised of granite. To prevent roller cracking and sagging, it is axially stressed by clamping plates at opposite ends. A plurality of tie-rods preferably placed closer to the periphery than the axial center of the roller, pass through the roller and join and draw together the clamping plates so as to axially stress the body. Either a single large diameter borehole or a plurality of boreholes are provided in the roller body, through which the tie-rods pass. The open space in the boreholes may be filled with a filler, such as concrete. To protect the tie-rods from abrasion, they may be covered by a protective sheath of plastic or rubber. In an alternate form, the stone roller body may be comprised of an axial series of roller body parts, having complementary formations on their adjoining faces for properly relatively positioning them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.