Abstract: Feeder hopper for a movable mineral material processing device, whose walls are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls, there is at least one locking means in connection with them, said locking means containing at least a locking member and transfer means. According to the method the locking member is transferred to the locking position with the transfer means.

Abstract: Feeder hopper for a movable mineral material processing device, whose walls are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls, there is at least one locking means in connection with them, said locking means containing at least a locking member and transfer means. According to the method the locking member is transferred to the locking position with the transfer means.

Abstract: A belt conveyor comprising a telescopic frame (1), an endless conveyor belt (9) which is supported by idlers (12) connected to the frame (1), a drawing drum (10), and a tilting drum (11), via which the conveyor belt (9) is arranged to run, and an actuator (14) mounted to the frame (1) for changing the length of the frame (1). The frame of the belt conveyor comprises frame blocks (5a, 5b, 5c, 5d, 5e, 5f, 5g) installed to each other in a slidable manner and a lattice mechanism (20) installed to them in a pivotal manner to effect a change in the length of the belt conveyor as a result of the operation of the actuator (14). The frame blocks (5a, 5b, 5c, 5d, 5e, 5f, 5g) comprise at least one frame pipe (2a, 2b, 2c, 2d, 2e, 2f, 2g, 3a, 3b, 3c, 3d, 3e, 3f, 3g), wherein at least one frame block (5a, 5b, 5c, 5d, 5e, 5f, 5g) comprises a supporting beam (4a, 4b, 4b? 4c, 4d, 4d?, 4e, 4f, 4g) connected to at least one frame pipe (2a, 2b, 2c, 2d, 2e, 2f, 2g, 3a, 3b, 3c, 3d, 3e, 3f, 3g).

Abstract: A belt conveyor comprising a telescopic frame (1), an endless conveyor belt (9) which is supported by idlers (12) connected to the frame (1), a drawing drum (10), and a tilting drum (11), via which the conveyor belt (9) is arranged to run, and an actuator (14) mounted to the frame (1) for changing the length of the frame (1). The frame of the belt conveyor comprises frame blocks (5a, 5b, 5c, 5d, 5e, 5f, 5g) installed to each other in a slidable manner and a lattice mechanism (20) installed to them in a pivotal manner to effect a change in the length of the belt conveyor as a result of the operation of the actuator (14). The frame blocks (5a, 5b, 5c, 5d, 5e, 5f, 5g) comprise at least one frame pipe (2a, 2b, 2c, 2d, 2e, 2f, 2g, 3a, 3b, 3c, 3d, 3e, 3f, 3g), wherein at least one frame block (5a, 5b, 5c, 5d, 5e, 5f, 5g) comprises a supporting beam (4a, 4b, 4b? 4c, 4d, 4d?, 4e, 4f, 4g) connected to at least one frame pipe (2a, 2b, 2c, 2d, 2e, 2f, 2g, 3a, 3b, 3c, 3d, 3e, 3f, 3g).

Abstract: Feeder hopper for a movable mineral material processing device, whose walls are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls, there is at least one locking means in connection with them, said locking means containing at least a locking member and transfer means. According to the method the locking member is transferred to the locking position with the transfer means.

Abstract: Feeder hopper for a movable mineral material processing device, whose walls are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls, there is at least one locking means in connection with them, said locking means containing at least a locking member and transfer means. According to the method the locking member is transferred to the locking position with the transfer means.

Abstract: Feeder hopper for a movable mineral material processing device, whose walls are arranged to be turned upward to a working position, and which are locked into said working position. To lock the walls, there is at least one locking means in connection with them, said locking means containing at least a locking member and transfer means. According to the method the locking member is transferred to the locking position with the transfer means.

Abstract: A belt conveyor frame and methods for manufacturing the same are disclosed, the cross section of the sidewall of the belt conveyor frame having at least two bends made thereto in two successive angles of opposite direction, whereby the sidewall cross section has essentially the shape of letter S or Z.