Claims
- 1. A disc for attachment to a shaft in a disc screen apparatus comprising:an inner rigid frame; an outer material partially covering the rigid frame; and wherein the disc has an outer perimeter which is substantially square with radiused corners.
- 2. The disc of claim 1 further comprising;a cylindrical boss extending from at least one side of the disc, the boss having a thickness and an outer perimeter.
- 3. The disc of claim 2 wherein an outer perimeter impact surface of the disc is greater than the outer perimeter of the boss.
- 4. The disc of claim 1 wherein the radiused corners have a texture.
- 5. The disc of claim 1 wherein the disc includes a first portion and a second portion configured to be coupled together around a shaft.
- 6. The disc of claim 5 wherein the disc further comprises;a disc parting plane separating the disc into a first portion and second portion, each portion containing a fraction of the rigid frame such that when the first and second portions are joined, a joining surface of the fraction of the rigid frame in the first half contacts a joining surface of the fraction of the rigid frame in the second half.
- 7. The disc of claim 1 wherein the outer material is compression molded around the rigid frame.
- 8. The disc of claim 1 wherein the outer material includes rubber.
- 9. The disc of claim 1 wherein the rigid frame is made of metal.
- 10. A disc for releasable attachment to a shaft in a disc screen apparatus for classifying mixed recyclable materials, comprising:an inner rigid frame; a flexible material covering the rigid frame, the flexible material having high abrasion resistance for impacting recyclable materials to be classified and having a high co-efficient of friction for engaging and propelling the materials in a conveying direction along a disc screen; the inner rigid frame and the outer material covering the frame being separable into a plurality of portions, the portions of the inner rigid frame being configured to provide an opening for receiving a shaft of the disc screen apparatus; means for releasably clamping the inner rigid portions around the shaft; and wherein the portions made of flexible material define an outer impacting surface with a generally square shape including rounded corners connected by flat portions.
- 11. The disc of claim 10 wherein the portions made of flexible material have a seam that extends to opposing flat portions of the impacting surface.
- 12. The disc of claim 10 wherein the shaft receiving opening is square and the clamping means includes a pair of bolts that extend on either side of the shaft parallel to a diagonal of the square shaft.
- 13. The disc of claim 10 wherein the inner rigid frame is made of metal and the flexible material is a rubber material molded to the inner rigid frame.
- 14. A disc for releasable attachment to a shaft in a disc screen apparatus for classifying mixed recyclable materials, comprising:an inner rigid frame; an outer material partially covering the rigid frame and defining an outer impacting surface with a generally square shape for engaging and propelling mixed recyclable materials in a conveying direction along a disc screen; the inner rigid frame and the outer material covering the frame being separable into a plurality of portions, the portions being configured to provide an opening for receiving a shaft of the disc screen apparatus; and means for releasably clamping the portions around the shaft.
- 15. A disc for releasable attachment to a shaft in a disc screen apparatus for classifying recyclable materials, comprising:a flexible material defining an outer impacting surface shaped for engaging and propelling mixed recyclable materials in a conveying direction along a disc screen apparatus; a rigid frame embedded within the flexible material and extending a substantial radial distance within the flexible material to impart stiffness; the flexible material and the inner frame being separable into a plurality of portions that can be assembled around a shaft of the disc screen apparatus; and means for releasably clamping the portions around the shaft.
Parent Case Info
This application is a division of U.S. patent application Ser. No. 09/246,999 filed Feb. 8, 1999, and patented on Jun. 26, 2001 as U.S. Pat. No. 6,250,478 B1.
US Referenced Citations (26)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2054615 |
Jan 1999 |
CA |