Magnetic trap assembly with a nonmetallic trap structure

• US 5,100,538 A
• Filed: 08/06/1990
• Issued: 03/31/1992
• Est. Priority Date: 08/06/1990
• Status: Expired due to Term

• Current Assignee: EDEM Steel Limited
• Original Assignee: EDEM Steel Limited
• Inventors: Howes, Glenn E.
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): Kaufman, Joseph A.
• Application Number:
  US07/562,694
• Time in Patent Office: 603 Days
• Field of Search: 209/38, 209/215, 209/223.1, 209/225, 209/636, 209/217, 209/567, 209/571, 209/930, 209/513, 209/228, 209/557, 209/564, 198/468.5, 198/690.1, 210/222
• US Class Current: 209/215
• CPC Class Codes: B03C 1/08 with non-movable magnets
• CPC Class Codes: B65G 27/04 Load carriers other than helical or spiral channels or conduits

Abstract

A magnetic trap in the pan floor of a vibratory conveyor comprises a recess in the pan floor for momentarily receiving articles falling therein. A magnet is provided beneath the recess to retain magnetic articles in the recess.

Claims

1. In a vibrating conveyor having a substantially horizontal conveyor pan, a magnetic trap in the conveyor pan to remove foreign metallic substances from a flow along the conveyor pan, the magnetic trap comprising:

(a) a nonmetallic floor;

(b) nonmetallic walls;

(c) a nonmetallic recess in the floor to momentarily trap the flow; and

(d) a magnet assembly beneath the recess to retain metallic objects in the recess.

2. An apparatus as in claim 1 wherein the recess further comprises:

(a) a shear leading edge; and

(b) an upwardly sloped trailing edge having a summit that meets the pan floor.

3. The apparatus as in claim 1, further comprising a metal detector beneath said nonmetallic floor and located in a direction which is downstream of said recess.

4. A magnetic trap unit for a vibrating conveyor, comprising:

(a) a nonmetallic floor;

(b) a pair of nonmetallic side walls on opposite sides of the nonmetallic floor;

(c) a nonmetallic recess in the floor having a sheer leading edge and an upwardly sloped trailing edge having a summit that meets the pan floor; and

(d) a metal detector beneath said nonmetallic floor and located adjacent the recess on the trailing edge side of the recess.

5. In a vibrating conveyor having a substantially horizontal conveyor pan, a magnetic trap unit in the conveyor pan, comprising:

(a) a nonmetallic floor;

(b) a pair of nonmetallic side walls on opposite sides of the nonmetallic floor;

(c) a nonmetallic recess in the floor having a sheer leading edge and an upwardly sloped trailing edge having a summit that meets the pan floor; and

(d) a metal detector beneath said nonmetallic floor and located adjacent the recess on the trailing edge side of the recess.