Seamless screen cylinder with laser cut openings
US5064537A · kind A · utility
39Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1989 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Dec 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49604
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Screen cylinders, and methods of making the same for use in removing contaminant particles from papermaking stock, have a seamless cylinder body and the openings or slots therethrough are formed by directing a focused laser beam at an outer surface while focusing the beam intermediate the outer an dinner surfaces to form an opening or slot with tapered walls. Wear bars may be applied to the inside surface as a bead of weld material. The seamless cylindrical body is formed by centrifugal casting or by cold roller extrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.