Resources Contact Us Home

Image Number 3 for United States Patent #4463951.

The invention provides a ball for a game having a spherical soft polyurethane foam and a surface layer of foamed polyvinyl chloride formed on the surface of the spherical body. The ball is produced by first casting the surface layer in a mold to form a hollow foamed PVC body having closed cells, and then charging a foamed polyurethane composition into the hollow thus formed, to produce a sphere of polyurethane having open cells within the surface layer. Also provided is a ball for games having a spherical body of foamed polyvinyl chloride and having a spherical cavity at the center. The ball is safe, has proper flexibility, and is not subject to punctures.

  Recently Added Patents
Method for producing vinyl acetate monomer
Focusing apparatus that effectively sets a focus area of an image when a focusing mode is changed
Question and answer system wherein experts are associated with models and have response rates that are associated with time intervals
Portion of display panel or screen with an icon
Methods and apparatus for preserving privacy in an RFID system
Automotive lighting system
Regenerative power storage system mounted on DC electric railway car
  Randomly Featured Patents
Method of extracting metals from spent electric storage batteries
Battery and related method
Packaging system for two part epoxy adhesives and the like
Low polarity dimerate and trimerate esters as plasticizers for thermoplastic compositions
Apparatus and method for employing M-ary pyramids to enhance feature-based classification and motion estimation
Instant light lamp control circuit
Substituted aryloxazoles and their use
Continuous containment monitoring with containment pressure fluctuation
Prayer wish creation and storage box
Vehicle cargo load floor with two recessed storage wells