Conveyor system diverter components having friction-enhancing surfaces and related methods of use

• US 5,735,388 A
• Filed: 05/07/1997
• Issued: 04/07/1998
• Est. Priority Date: 09/28/1994
• Status: Expired due to Fees

• Current Assignee: Dematic Corporation
• Original Assignee: Mannesmann Dematic Rapistan Corp. (Siemens AG)
• Inventors: Brouwer, Gerald A.
• Primary Examiner(s): Valenza, Joseph E.
• Application Number:
  US08/852,677
• Time in Patent Office: 335 Days
• Field of Search: 198/367, 198/369.4, 198/369.6, 198/688.1, 198/699.1, 198/780, 492/30, 492/37, 492/56
• US Class Current: 198/699.1
• CPC Class Codes: B65G 13/10 Switching arrangements
• CPC Class Codes: B65G 39/07 Other adaptations of sleeves

Abstract

A conveyor diverter system comprising one or more conveyors, components for diverter systems having friction-enhancing outer surfaces, friction-enhancing layers and compositions that provide such surfaces are disclosed. In addition, methods of reducing the frequency or occurrence of articles being misdiverted by use of such systems, components, layers and compositions are described. The preferred embodiment of the friction-enhancing layer and composition disposed on the outer periphery of the diverter components comprises grit materials dispersed in a metallic material such that a particular grit surface density is achieved and grit particles protrude above the uppermost surface of the metallic layer within a range of particular distances.

Claims

1. A conveyor system utilizing at least one powered component having a friction-enhancing outer article contacting surface, said system comprising:

a conveyor including a conveying surface supported by a framework structure;

said conveying surface including at least one powered roller; and

wherein said powered roller includes a friction-enhancing layer disposed on at least a portion of an outer article contacting surface of said powered roller, said friction-enhancing layer including an effective amount of grit material dispersed in a metallic material contacting said outer article contacting surface of said powered roller.

2. The conveyor system of claim 1 wherein said friction-enhancing layer has a grit surface density of approximately 30%.

3. The conveyor system of claim 1 wherein said grit material comprises abrasive particles having a size of from about number 16 to about number 60.

4. The conveyor system of claim 3 wherein said grit material comprises abrasive particles having a size of from about number 16 to about number 24.

5. The conveyor system of claim 1 wherein said grit material is uniformly dispersed in said metallic material.

6. The conveyor system of claim 1 wherein said grit material is in the form of particles, at least a portion of which protrude above the outermost surface of said metallic layer a distance of from about 0.02 inches to about 0.07 inches.

7. The conveyor system of claim 6 wherein said grit material is in the form of particles, at least a portion of which protrude above the outermost surface of said metallic layer a distance of from about 0.04 inches to about 0.05 inches.

8. The conveyor system of claim 1 wherein said grit material is selected from the group consisting of diamond, corundum, emery, garnet, pumice, pumicite, tripoli, silicon carbide, aluminum oxide, zirconia alumina, synthetic diamond, boron nitride, tungsten carbide, steel wool, metal oxides and combinations thereof.

9. The conveyor system of claim 8 wherein said grit material is tungsten carbide.

10. The conveyor system of claim 1 wherein said metallic material is selected from the group consisting of copper-based materials, silver-based materials, nickel-based materials, aluminum-based materials, tin-based materials, lead-based materials and combinations or alloys thereof.

11. The conveyor system of claim 1 wherein said metallic layer comprises a copper-based braze material.