Electrostatic display device
OwnerBarbara Graham, Katherine L. Kilman +1inventors
InventorsBarbara Graham, Katherine L. Kilman, Robert L. Graham
Life of this patent
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Abstract
A device for detachably adhering a manipulative to a substrate using electrostatic charges is described. The invention comprises a thermoplastic substrate having imparted thereto a substantially persistent electrostatic charge with paper and/or fabric manipulatives removably adhered thereto by electrostatic attraction. The present invention may be useful for creating visual displays such as display boards, design boards for quilting patterns, sewing patterns, and toys such as dolls and educational games or aides using manipulatives in visual displays. The substrate is preferably made of polyolefin nonwoven webs, particularly polypropylene or polyethylene meltblown webs.
Claims16
A visual display device, comprising:
- a) a support having affixed thereto a substrate of a nonwoven thermoplastic fabric, said fabric carrying a persistent electrostatic charge imparted to the fabric or fibers thereof by passing the fabric through an electrostatic field;
- and
- b) a manipulative article formed from materials selected from the group consisting of paper, fabrics having plant based fibers, fabrics having animal based fibers, and fabrics having thermoplastic fibers, said manipulative article being secured in detachable engagement with the nonwoven thermoplastic fabric by the electrostatic charge imparted to the nonwoven thermoplastic fabric.
A visual display device comprising
- (a) a planar substrate made of an electrically nonconductive material;
- and
- (b) a manipulative article made of nonwoven thermoplastic fabric having a persistent electrostatic charge being imparted to the fabric by passing the fabric or fibers thereof through an electrostatic field, the article being held in detachable engagement with the substrate by said electrostatic charge.
A visual display device comprising:
- a) a support having affixed thereto a substrate of a nonwoven thermoplastic fabric, said fabric carrying a persistent electrostatic charge imparted thereto by passing the fabric or fibers thereof through an electrostatic field;
- and
- b) a plurality of manipulative articles formed from materials selected from the group consisting of paper, fabrics having plant based fibers, fabrics having animal based fibers, and fabrics having thermoplastic fibers, said articles being held in detachable engagement with the charged nonwoven thermoplastic fabric by said electrostatic charge imparted to the nonwoven thermoplastic fabric.
Dependencies are inferred from the claim text.