Method and apparatus for producing a compressible zone in at least one peripheral region of a mineral fiber sheet or batt for insulation against heat, sound and/or fire, and mineral fiber sheets produced by the method
US5213885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1991 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Mar 4, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24777
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
For fulling, the mineral fiber sheets (11) are moved in the direction of the arrow by means of two endless studded belts, only the lower one (15) of which is visible in the drawing. By means of the first fulling tool (29), pre-fulling to a depth of about 8 cm is effected. With the second fulling tool (30), fulling to a depth of about 11 cm is effected. During the fulling process, the region of the mineral fiber sheet (11) not belonging to the fulling zone is supported on the bottom and top, so that a change in the fibrous structure of the material takes place only in the peripheral region that subsequently forms a compressible zone (23). The fulling is done from the side, or in other words in the same direction as the later compression upon installation of the mineral fiber sheet between two rafters. To prevent sagging of the mineral fiber sheet (11) during the fulling process, guides, only the lower guide (27) of which is visible, are disposed in the region of the fulling zone above and below the mineral fiber sheet. Each fulling tool (29, 30) comprises a plunger (32) with a cylindrically curved surface (31), over which an endless belt (37) is guided. The belt travels at practical…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.