Covering for waste depositories

US4768897A · kind A · utility

Assignee

• Ed. Z.sup.3 blin Aktiengesellschaft · DE

Inventors

• Manfred Nussbaumer · Leonberg, DE
• Eberhard Glaser · Esslingen am Neckar, DE
• Eberhard Beitinger · Stuttgart, DE

Key dates

• Filing date: Dec 6, 1985
• Grant date: Sep 6, 1988
• Expiry date: Dec 6, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/30
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A multilayer plate for use in covering waste depositories comprises at least one drainage layer and a filter stabilization layer, the drainage layer serving to facilitate or enable the removal of water seeping downwardly from the surface of the depository covering or gases rising from the depository body. The filter stabilization layer comprises a fabric web, while the drainage layer includes a plastic grid. The plate is prefabricated and is of sufficient flexibility to be wound upon a roll for transport to a depository site. In one form, the prefabricated plate also includes a synthetic resin barrier layer which, upon installation of the plate, blocks the passage of water from above and the passage of gases from below.