Abstract: A novel method for refurbishing a rubber disc used in a recycle machine comprises the steps of cleaning and sanding the surface of the disc; priming at least the surface of the disc with a liquid primer or interfacing agent (adhesive); placing the disc in a portion of a mold; charging or filling the mold with a polymer (synthetic rubber or elastomer) mixed with a suitable catalyst, hardener or activator; allowing the synthetic rubber polymer to exothermally cure inside the mold; and withdrawing the disc from the mold. The resulting refurbished disc is characterized by a new outer surface layer (synthetic rubber) adhered to the original rubber disc. In an alternatively preferred method, one or more relatively small holes are formed in the surface of the disc prior to molding the new outer surface layer on the disc whereupon the strength of the bond between the new outer layer and the original disc is enhanced.

Abstract: A sanding apparatus includes a flexible base member which includes a base member bottom side and a base member top side. A quantity of abrasive material, e.g. a sheet of sandpaper, is adhesively attached to the base member bottom side. A flexible handle is positioned above the base member top side. Attachment means are provided for attaching the flexible base member to the flexible handle. Rod reception brackets are attached to the base member top side, and one or more flexibility adjustment rods are received in the rod reception brackets. The rod reception brackets include bracket rod reception channels which receive the flexibility adjustment rods. The flexible handle includes handle rod reception channels which are in registration with the bracket rod reception channels. Rod reception tubes are received in the bracket rod reception channels and the handle rod reception channels.

Abstract: Ion-sensitive compounds are provided comprising a quaternary polypyridinium receptor designed to bind anionic species by the formation of a receptor-substrate complex. The receptor comprises one or more quaternary 2,2'-bipyridyl moieties. The compounds are of use in applications requiring anion detection or removal.