Process for the production of a bituminous sealing sheet
US6740356B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Oct 25, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24612
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A process and an installation for the production of a bituminous sealing sheet, comprises a strip impregnated and/or coated with a given bitumen and having a zone in the shape or a band or a portion of a band of a different bitumen from the first bitumen. A strip (2) is produced which is impregnated and/or coated except for at least one zone in the form of a strip or a strip portion (4) on at least one of its surfaces (2′, 2″), having a thinner thickness of bitumen (3, 3′) or no application of bitumen (3, 3′), to be used at the at least one strip or strip portion (4), over a controlled thickness, a different bitumen (5) from that initially applied and finally, after cooling and solidification of the eventually added bitumen (5), processing the resulting sheet or sealed membrane (11) 5 in the desired form, the processing operations being carried out by continuous movement of the strip (2) in an installation (6) or suitable coating line comprising at least two coating stations (7, 7′, 8).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.