Conveyor belt cleaner

• US 3,888,345 A
• Filed: 11/26/1973
• Issued: 06/10/1975
• Est. Priority Date: 12/18/1972
• Status: Expired due to Term

• Current Assignee: Laymon Mitchell
• Original Assignee: Laymon Mitchell
• Inventors: Mitchell, Laymon
• Primary Examiner(s): Blunk, Evon C.
• Assistant Examiner(s): Thompson, Richard K.
• Application Number:
  US05/418,931
• Time in Patent Office: 561 Days
• Field of Search: 198/230 74/230
• US Class Current: 198/494
• CPC Class Codes: B65G 45/20 comprising screws

Abstract

An endless conveyor belt cleaner in which a helical cleaning roller rotates in contact with a belt in the same direction as movement of the belt and at a peripheral speed in excess of the speed of movement of the belt.

Claims

1. In combination with a flexible belt entrained for movement about a pulley:

a cleaning roller 3 to 5 inches in diameter rotatably mounted about a rotational axis substantially parallel to that of the pulley;

means mounting said roller for rotation in peripheral contact with the belt and for adjustably positioning said roller with respect to said belt;

drive means drivingly connected to said roller for imparting rotation thereto in a direction corresponding to the direction of movement of said belt and a roller speed of 1 1/2 to 2 1/2 times the speed of movement of said belt;

said cleaning roller includes a plurality of circumferentially spaced continuous formations of a width of 1 to 1 1/2 inches and projecting 1/4 to 1/2 inch radially on said roller and forming helical grooves therebetween;

the helix angle of said formation, measured perpendicular to the axis of said roller, is within the range of 30* to 45*; and

the diameter of said roller increases from the center to each side of said roller at a rate of up to 1/8 inch in 12 inches.

2. A structure as defined in claim 1 wherein the pitch of said helical formation in regions on either side of the center of the said roller is reversed, whereby debris removed from said belt by said roller is moved to the center region of said roller and discharged therefrom.

3. A structure as defined in claim 2 wherein said belt speed varies from 50 feet per minute to 750 feet per minute and the peripheral speed of said roller varies directly with the speed of said belt from 100 feet per minute to 1,800 feet per minute.