Claims
- 1. A charge dissipating mat, comprising:
- a plurality of transparent thermoplastic layers, each layer containing an antistatic agent, forming a lamination with first and second faces;
- at least one electrically conductive ion collector member; and
- an electrically conductive medium on at least one of the first and second faces of said mat, connected with said ion collector member.
- 2. A charge dissipating mat as defined in claim 1, wherein said ion collector member comprises an edge clip bridging the upper and lower faces of said mat.
- 3. A charge dissipating mat as defined in claim 1, wherein the thermoplastic layers include a binder material selected from the group polyvinyl chloride, polypropylene, polycarbonates, and acrylic polymers.
- 4. A charge dissipating mat as defined in claim 3 wherein the transparent thermoplastic layers are further comprised of a plasticizer.
- 5. A charge dissipating mat as defined in claim 1 wherein the ion collector member is electrically grounded through a current limiting resistor.
- 6. A charge dissipating mat as defined in claim 1 wherein the second face of said mat is configured with a plurality of support members, characterized by smooth surface curvature.
- 7. A charge dissipating mat as defined in claim 1 wherein said conductive medium comprises a printed semiconductive pattern.
- 8. A charge dissipating mat as defined in claim 7 wherein the semiconductive pattern is comprised of a thin layer of thermoplastic resin containing dispersed carbon black powder.
- 9. A charge dissipating mat as defined in claim 1 wherein the conductive medium comprises a matrix of elongate metallic members.
- 10. A charge dissipating mat, comprising
- a plurality of transparent thermoplastic layers, forming a lamination with first and second faces; and
- an opaque pattern layer laminated to at least one of said first and second faces.
- 11. A charge dissipating mat as defined in claim 10 wherein the opaque pattern layer is comprised of an electrically conductive or semiconductive material.
- 12. A charge dissipating mat as defined in claim 11 further comprising an electrically conductive member connected with said opaque pattern layer.
- 13. A charge-dissipating mat, comprising
- a plurality of transparent thermoplastic layers, forming a lamination with first and second faces; and
- first and second opaque pattern layers respectively laminated to said first and second faces, in symmetric registration.
- 14. A charge-dissipating mat as defined in claim 13, wherein the opaque pattern layers are characterized by a relatively high coefficient of friction.
- 15. A charge dissipating mat as defined in claim 10 wherein the opaque pattern layer is comprised of a thermoplastic binder resin with dispersed carbon black powder.
- 16. A charge-dissipating mat, comprising
- a plurality of transparent thermoplastic layers, forming a lamination with first and second faces, wherein said first face is configured in a protruding lattice structure with recessed interstices; and
- an opaque pattern layer in registration with and laminated to said protruding lattice structure.
- 17. A charge dissipating mat as defined in claim 16 wherein the protruding lattice structure includes an array of stress relief cavities.
BACKGROUND OF THE INVENTION
This instant application is a continuation-in-part of U.S. patent application Ser. No. 346,716, filed Feb. 8, 1982, now U.S. Pat. No. 4,415,946.
US Referenced Citations (6)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
346716 |
Feb 1982 |
|