Roller-belt conveyor with infeed pull-away

• US 7,942,257 B2
• Filed: 06/26/2006
• Issued: 05/17/2011
• Est. Priority Date: 06/26/2006
• Status: Active Grant

• Current Assignee: Laitram LLC
• Original Assignee: Laitram LLC
• Inventors: DePaso, Joseph M., UnKauf, Timothy C.
• Primary Examiner(s): Crawford; Gene
• Assistant Examiner(s): Singh; Kavel
• Application Number:
  US11/426,409
• Publication Number:
  US 20070295582A1
• Time in Patent Office: 1,786 Days
• Field of Search: 198/779, 198/837, 198/833, 198/457.02, 198/370.09
• US Class Current: 198/779
• CPC Class Codes: B65G 17/24 comprising a series of rollers which are moved , e.g. over a supporting surface, by the traction element to effect conveyance of loads or load-carriers
• CPC Class Codes: B65G 21/20 Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces arrangements for supporting belts B65G15/60; rollers or roller arrangements B65G39/00

Abstract

A separation conveyor using a roller belt whose rollers are already rotating before receiving an article to provide immediate pull-away from an infeed conveyor. The rollers of a roller belt extend through the thickness of the belt and into contact with a bearing surface in a reversing segment of a belt path between the returnway and the carryway of the separation conveyor. The rollers are already rotating on the bearing surface in the reversing segment at the infeed end before they contact articles to avoid delays in pulling articles away from the infeed conveyor and onto the separation conveyor.

Claims

1. A conveyor comprising:

a roller belt having a plurality of rollers extending through the thickness of the roller belt advancing along a conveying path including an upper carryway segment along which articles are conveyed in a conveying direction, a lower returnway segment below the carryway segment along which the roller belt advances in a direction opposite to the conveying direction, a first reversing segment along which the roller belt transitions upward from the returnway segment to the carryway segment, and a second reversing segment along which the roller belt transitions downward from the carryway segment to the returnway segment; and

a C-shaped stationary bearing surface underlying the roller belt in the first reversing segment and providing a surface on which the rollers roll in the first reversing segment as the roller belt advances.

2. A conveyor as in claim 1 wherein the C-shaped stationary bearing surface underlying the roller belt in the first reversing segment is a convex bearing surface.

3. A conveyor as in claim 1 comprising a bearing surface underlying the roller belt in the upper carryway segment that is continuous with the C-shaped stationary bearing surface underlying the roller belt in the first reversing segment.

4. A conveyor as in claim 3 wherein the bearing surfaces are continuous across the width of the conveyor.

5. A conveyor as in claim 3 wherein the bearing surfaces are segmented across the width of the conveyor.

6. A conveyor as in claim 1 comprising a reversing wheel engaging the roller belt in the second reversing segment and devoid of a reversing wheel in the first reversing segment.

7. A conveyor comprising:

a reversing wheel defining an exit end of the conveyor;

a stationary C-shaped convex bearing surface spaced apart from the reversing wheel and defining an infeed end of the conveyor;

a belt arranged in a loop trained around the reversing wheel and the stationary C-shaped convex bearing surface and defining a carryway segment extending from the infeed end to the exit end of the conveyor;

wherein the belt includes a plurality of rollers extending through the thickness of the belt to roll on the stationary C-shaped convex bearing surface as the belt advances along the carryway from the infeed end to the exit end in a conveying direction.

8. A conveyor as in claim 7 comprising a carryway bearing surface underlying the belt in the carryway segment that is continuous with the stationary C-shaped convex bearing surface.

9. A conveyor as in claim 8 wherein the carryway bearing surface and the stationary C-shaped convex bearing surface are continuous across the width of the conveyor.

10. A conveyor as in claim 8 wherein the carryway bearing surface and the stationary C-shaped convex bearing surface are segmented across the width of the conveyor.

11. A conveyor as in claim 7 devoid of a reversing wheel at the infeed end of the conveyor.