Abstract: Methods and apparatus for representing a three-dimensional object by means of a High Density Point Data Model (HDPDM) consisting of a large number of individual data values, each of which specifies the coordinates of a point on the surface of a three dimensional object. An initial HDPDM is produced by scanning a physical object, tessellating the elements of a CAD representation of the object surface, or evaluating mathematical expressions which describe the surface. Further data values define a virtual tool surface which is spaced from the modeled object surface. The projection of the virtual tool surface on the object surface along projection lies parallel to a defined axis of projection identifies selected points on the surface which are modified by effectively moving them to the tool surface.

Abstract: A fastening assembly for securing plastic panels (50) to metallic substrates (52) is provided in which a metallic nut (14) is mounted in snap-fit relationship on plastic insert (12), which is in turn engaged in snap-fit relationship on the metallic substrate (52). The nut (14) slidably engages the plastic insert (12) to permit certain movement along an axis perpendicular to the axis of the insert (12) to provide thermal compensation for the mounted plastic panel (50). The nut (14) itself utilizes the same guide lug structure (26) of the insert member (12) to both effect snap-fit retention of the nut (14) on the insert (12) and to guide the sliding movement of the nut (14) with respect to the insert (12).

Abstract: A guide ring is provided for an automotive seat belt system which includes a roller mounted for free rotational movement during normal guide ring operation and for frictional engagement with one side of the seat belt upon imposition of a load by the occupant in an emergency situation.

Abstract: Coating compositions comprising hydroxy functional film formers, crosslinking agent therefor and flow control additive comprising stable crosslinked dispersion formed by addition polymerization of selected monomers in the presence of novel polymeric dispersion stabilizer, wherein, the dispersion is stabilized further by inclusion therein of a butylated melamine formaldehyde resin.