Method of reconditioning a water well, in particular a drinking- water or process-water well, in which a certain mortar is pressed only near to the damaged point through the already existing water-ingress slots (18) into a filtering-gravel layer surrounding the well tube against the static pressure of the penetrating ground water.

Command-cure compositions especially for use in insulated window assemblies permit the composition to be rendered adhesively bonding at a selected time interval after formation of the assembly to firmly bond opposed surfaces of the assembly; a particular adhesive in strip or tape form comprises an adhesive polymer composition which is transparent to curing radiation especially UV, and curable in t...

A spiral link belt comprising a multiplicity of synthetic resin helices consisting of flat winding lets and winding arcs with the winding arcs of a helix meshing in zipper fashion with the winding arcs of the adjacent helix. Pintle wires are inserted into the channels formed by the meshing winding arcs of each two helices. A plurality of helices consist of at least two components, the first compon...

The electrically driven toothbrush has a cylindrical housing (1) which forms the handle and contains the motor and battery. The toothbrush has rotating head in the form of a cup with the wall of the cup formed from bristles. - The bristles are arranged in concentric rings with the length of the bristles decreasing from the inner edge to the outer edge of the cup wall. The cup can be filled with a ...

(+7.11.86 (11), 22.12.86 (3), 22.4.87, 20.5.87 - JP - 265172/3/4/5/6/7/8/9/80/1/2, 305919/20/1, 099130, 123534) (929BD)