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
Heterogeneous language data typing without executable regeneration
Image forming apparatus with static elimination
Organic light emitting diode light source device
Method and apparatus for selective decoding in a wireless communication system
Image forming unit having agitating portion and image forming apparatus
Recording medium, playback device, integrated circuit
Computer system for routing package deliveries
  Randomly Featured Patents
Output buffer circuit, memory chip, and semiconductor device having a circuit for controlling buffer size
Append-based shared persistent storage
Vibratory sensor with virtual node/antinode correction of secondary harmonics
Electrical connecting element and window pane provided with such an element
Method for inactivating pathogens in erythrocytes using photoactive compounds and plasma protein reduction
Magnetically linked multi-valve system
Connector equipped with engagement detecting member
Heating and stratification device for an injection molding machine
Detector of radio frequency signals for contactless chip cards
Constant false alarm rate adaptive radar control