Wear-resistant connector for a modular link conveyor belt

• US 7,837,029 B2
• Filed: 09/05/2006
• Issued: 11/23/2010
• Est. Priority Date: 09/02/2005
• Status: Active Grant

• Current Assignee: Span Tech LLC
• Original Assignee: Span Tech LLC
• Inventors: Russell, Mark D.
• Primary Examiner(s): Hess; Douglas A
• Application Number:
  US11/515,542
• Publication Number:
  US 20070051588A1
• Time in Patent Office: 1,540 Days
• Field of Search: 198850-853, 198/953, 474/214, 427/248.1, 384/907, 384/907.1, 24/33.R, 24/33.L, 24/33.A
• US Class Current: 198/851
• CPC Class Codes: B65G 17/086 specially adapted to follow a curved path for individual load carriers B65G17/22
• CPC Class Codes: B65G 2207/12 Chain pin retainers
• CPC Class Codes: B65G 2207/26 Hygienic features, e.g. easy to sanitize
• CPC Class Codes: B65G 2207/48 Wear protection or indication features
• CPC Class Codes: C09D 5/03 Powdery paints
• CPC Class Codes: C09D 5/033 characterised by the additives
• CPC Class Codes: Y10T 24/1628 Overlapped belt ends
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A connector for connecting modular conveyor links to form a belt includes a rod-like core and a powder coating forming a protective shell. The core may be stainless steel and the powder coating may be nylon.

Claims

1. In a conveyor system having a first conveyor part with a surface subjected to wear as the result of sliding frictional contact with a second conveyor part, the improvement comprising:

a powder coating applied to the surface of the first conveyor part to form a durable outer shell substantially over the entirety of the first conveyor part without a gap between the outer shell and the second conveyor part in which food particles or debris may become trapped,

whereby the outer shell serves to reduce friction between the first and second conveyor parts, provides enhanced wear resistance to the first conveyor part by preventing surface contact with the material underlying the outer shell, and improves cleanability of the first conveyor part.

2. The system of claim 1, wherein the first part comprises stainless steel.

3. The system of claim 1, wherein the powder coating comprises a polyamide.

4. The system of claim 1, wherein the powder coating comprises nylon.

5. The system of claim 1, wherein the second part comprises a polymer material.

6. The system of claim 1, wherein the second part comprises acetal.

7. The system of claim 1, wherein the second part comprises a link of a chain and the first part comprises a connector for engaging the link such that sliding friction results.

8. The system of claim 7, wherein the link includes an opening for receiving the connector such that the surface of the connector including the powder coating frictionally engages a corresponding surface of the link within the opening.

9. The system of claim 1, wherein one of the first or second parts is fixed and the other is moving.

24. The improvement for a conveyor system according to claim 1, wherein the outer shell is seamless.

10. A method of manufacturing a conveyor belt section from a plurality of interdigitated links, comprising:

providing a surface of a connector with a powder coating to form a durable outer shell without a gap between the connector and the outer shell in which food particles or debris may become trapped; and

connecting the interdigitated links with the coated connector.

11. The method of claim 10, wherein the providing step comprises electrostatically applying a nylon powder to a surface of the connector and then heating the connector.

12. The method of claim 10, wherein the heating step is for a period greater than about 15 minutes and at a temperature greater than about 400°

F.

13. The method of claim 10, wherein the providing step comprises placing nylon over an entire outer surface of the connector.

14. A method of manufacturing a conveyor belt section from a plurality of interdigitated links, comprising:

providing an outer surface of a steel connector with a nylon coating to form a durable outer shell without a gap between the outer shell and the steel connector in which food particles or debris may become trapped; and

connecting the interdigitated links with the coated connector.

15. The method of claim 14, wherein the providing step comprises electrostatically applying a nylon powder to a surface of the connector and then heating the connector.

16. The method of claim 15, wherein the heating step is for a period greater than about 15 minutes and at a temperature greater than about 400°

F.

17. In a conveyor for conveying articles in a conveying direction, said conveyor having a first link having a surface subjected to wear as the result of contact with a generally cylindrical stainless steel connector for connecting the first link with a second link, the improvement comprising a powder coat applied to the surface of the stainless steel connector to form a durable outer shell without a gap between the outer shell and the connector in which food particles or debris may become trapped.

18. The conveyor according to claim 17, wherein the powder coat comprises nylon.

19. The conveyor according to claim 17, wherein the stainless steel connector further includes at least one notch.

20. In a conveyor system having a plurality of interdigitated links connected by a metal connector rod having a surface subjected to wear as the result of sliding frictional contact with one or more of the links, the improvement comprising a powder coating applied to the surface of the metal connector rod to form a durable outer shell without a gap between the connector rod and the outer shell in which food particles or debris may become trapped, whereby the outer shell serves to reduce friction between the links and the connector rod, provides enhanced wear resistance to the connector rod, and improves cleanability of the connector rod.

21. In a conveyor system having a plurality of interdigitated links connected by a steel connector rod having a surface subjected to wear as the result of sliding frictional contact with one or more of the links, the improvement comprising a nylon powder coating applied to the surface of the connector rod to form a durable outer shell without a gap between the connector rod and the outer shell in which food particles or debris may become trapped, whereby the outer shell serves to reduce friction between the links and the connector rod, provides enhanced wear resistance to the connector rod, and improves cleanability of the connector rod.

22. A method of manufacturing a conveyor belt section from a plurality of interdigitated links, comprising:

providing an electrically conductive connector rod for interconnecting the interdigitated links;

electrostatically applying a powder to a surface of the connector;

heating the power to form a protective outer shell; and

connecting the interdigitated links with the coated connector to form the conveyor belt section.

23. A method of forming a connector for connecting a plurality of interdigitated links to form a conveyor belt section, comprising:

providing a steel rod for forming the connector for connecting the interdigitated links;

electrostatically applying a powder to a surface of the steel rod; and

heating the powder to form a protective outer shell without a gap between the steel rod and the outer shell in which food particles or debris may become trapped,

whereby the outer shell, in use, serves to reduce friction between the links and the connector rod, provides enhanced wear resistance to the connector rod, and improves cleanability of the connector rod.