Abstract: A swimming pool cover for covering the entire area of a water-filled pool so as to prevent egress of silt and debris into the pool during periods of non-use comprises a water-impervious sheet material configured to extend across the entire area of the pool. A securing strap is attached at spaced-apart positions near edges of the sheet material for securing the sheet material in a taut condition to pool outer portions. An anchor is disposed in the pool outer portions for anchoring the securing strap in a manner to provide the taut condition of the sheet material. A resilient attachment, such as a spring, attaches the securing strap to the anchor so as to ensure the maintenance of the taut condition. At least one aperture is disposed in the sheet material at a lowermost portion thereof. A filter is attached along and near peripheral edges of the aperture and the filter has pore sizes sufficient to be impervious to silt and debris but pervious to water.

Abstract: A floatable on water, translucent laminated plastic sheet material having a plastic embossed film with a plurality of embossments dispersed thereon except at the longitudinal edges thereof. The embossments are spaced apart and separated by land areas and a plastic backing film is laminated to the embossed film at the said longitudinal edges and at the land areas. Thus air containing buoyant cells are formed by the embossments of the embossed film and the backing film. The improvement comprise a fibrous material laminated to the sheet material at least at the longitudinal edges thereof, whereby the edges are reinforced by the fibrous material and the edges may be attached to correspondingly reinforced edges of another of the sheet material without substantially weakening the attached sheets of material at the attachments thereof.

Abstract: A floatable on water, translucent laminated plastic sheet material having a plastic embossed film with a plurality of embossments dispersed thereon except at the longitudinal edges thereof. The embossments are spaced apart and separated by land areas and a plastic backing film is laminated to the embossed film at the said longitudinal edges and at the land areas. Thus air containing buoyant cells are formed by the embossments of the embossed film and the backing film. The improvement comprise a fibrous material laminated to the sheet material at least at the longitudinal edges thereof, whereby the edges are reinforced by the fibrous material and the edges may be attached to correspondingly reinforced edges of another of the sheet material without substantially weakening the attached sheets of material at the attachments thereof.