Device for cleaning conveyor belts

Claim 2

A cleaning device for use in continuous cleaning of a conveyor belt, said device comprising a cleaning member mounted on a lever which can move angularly about a pivot axis extending transverse to the run of the belt and said lever also carries a pressure member which is arranged to contact the face of the belt opposite to the face to be cleaned, the arrangement being such that when the belt is stationary the device is in a rest position with the cleaning member out of cleaning contact with the belt and when the belt moves the movement of the belt causes the pressure member to move the lever angularly about said pivot axis to an operative position in which the cleaning member is urged into cleaning contact with the surface of the belt.

Claim 3

A cleaning device according to claim 1 in which the lever is arranged to move from its rest position to its operative position through an angle of 5° to 30°.

Claim 4

A cleaning device according to claim 1 in which the lever is arranged to move from its rest position to its operative position through an angle of 10° to 30°.

Claim 5

A cleaning device according to claim 1 in which the lever is arranged to move from its rest position to its operative position through an angle of 15° to 25°.

Claim 6

A cleaning device according to claim 1 in which the pressure member is a roller freely rotatable about an axis parallel to the pivot axis of the lever.

Claim 7

A cleaning device according to claim 1 in which the cleaning member is a scraping blade.

Claim 8

A cleaning device according to claim 1 in which the adjustment means are provided to adjust the angle of the cleaning member relative to the lever.

Claim 9

A cleaning device according to claim 1 in which the pressure member and the cleaning member are resiliently urged towards one another.

Claim 10

A cleaning device according to claim 8 in which the urging force is adjustable.

Claim 11

A cleaning device according to claim 8 or 9 in which abutment means are provided to limit the amount of movement of the cleaning means towards the pressure means.

Claim 12

A cleaning device according to claim 1 in which stop means are provided to limit the pivoting of the lever in a forward and/or in a reverse direction.

Claim 13

A cleaning device according to claim 1 in which the pressure member is mounted on a transverse element which is fixed at each end to a sliding member arranged to slide within a casing secured to the lever and the cleaning member is secured at each end to a second sliding member also slidable within said casing the two sliding members being biased by spring means so that the pressure member and the cleaning member are urged towards one another.

Claim 14

A cleaning device for use in continuous cleaning of a conveyor belt, said device comprising a cleaning member mounted on a lever which can move angularly about a pivot axis extending transverse to the run of the belt and said lever also carries a pressure member which is arranged to contact the face of the belt opposite to the face to be cleaned, the arrangement being such that when the belt is stationary the device is in a rest position with the cleaning member out of cleaning contact with the belt and when the belt moves the movement of the belt causes the pressure member to move the lever angularly about said pivot axis to an operative position in which the cleaning member is urged into cleaning contact with the surface of the belt, said pressure being mounted on a transverse element which is fixed at each end to a sliding member arranged to slide within a casing secured to the lever and the cleaning member is secured at each end to a second sliding member also slidable within said casing the two sliding members being biased by spring means so that the pressure member and the cleaning member are urged towards one another said lever being arranged to move from its rest position to its operative position through an angle of 5° to 30°.

Claim 15

A cleaning device for use in continuous cleaning of a conveyor belt, said device comprising a cleaning member mounted on a lever which can move angularly about a pivot axis extending transverse to the run of the belt and said lever also carries a pressure member which is arranged to contact the face of the belt opposite to the face to be cleaned, the arrangement being such that when the belt is stationary the device is in a rest position with the cleaning member out of cleaning contact with the belt and when the belt moves the movement of the belt causes the pressure member to move the lever angularly about said pivot axis to an operative position in which the cleaning member is urged into cleaning contact with the surface of the belt, said pressure being mounted on a transverse element which is fixed at each end to a sliding member arranged to slide within a casing secured to the lever and the cleaning member is secured at each end to a second sliding member also slidable within said casing the two sliding members being biased by spring means so that the pressure member and the cleaning member are urged towards one another said lever being arranged to move from its rest position to its operative position through an angle of 5° to 30°.

Claim 16

A cleaning device according to claim 13 in which the lever is arranged to move through an angle of 10° to 30°.