Abstract: A light-emitting element includes an anode electrode, a cathode electrode, and a QD layer provided between the anode electrode and the cathode electrode, the QD layer containing the QDs. The QDs are AgInxGa1-xSySe1-y-based or ZnAgInxGa1-xSySe1-y-based Cd-free QDs (0?x<1, 0?y?1) and exhibit fluorescence characteristics having a fluorescent half width of 45 nm or less and a fluorescence quantum yield of 35% or more in a green wavelength region to a red wavelength region.

Abstract: Lithographic plates (S) are transported from an input chute (2) onto which they are released from an overhead conveyor (1) to an outlet (20) at a lower level by a rotary shelf device (10) in which a series of plate trays (16) travel with endless chains (13, 13'). The lithographic plates are fed onto successive plate trays (16) by a belt conveyor (4) onto which the plates are directed from the chute (2). The plate trays (16) are upwardly inclined away from the chains (13, 13') during the downward movement of the trays from a position adjacent the belt conveyor (4) to the outlet (20).

Abstract: A device is provided for transferring a lithographic plate (S) from a horizontal conveyor (1) to an overhead conveyor (25). The transfer device has orienting means (2) for receiving a transversely extending lithographic plate from the horizontal conveyor (1) and positioning a folded over end portion (12) of the lithographic plate in the path of a hook member (13) carried by an endless chain (30) of an elevator (3), so that the plate (S) is lifted into a vertical position and then deposited on a positioning bed (4). An upper part (23) of the bed (4) is pivotable by a pneumatic or hydraulic cylinder (22) to position the end portion (12) of the plate (S) inwardly of the locus of the hook member (13) as the hook member passes around a lower sprocket wheel (15) of the elevator, so that the hook member passes by without again picking up the lithographic plate.

Abstract: Described herein is a lithographic plate transfer system composed of a lithographic plate pickup conveyor (10), a transfer conveyor (30) and an allocator (60). The plate pickup (10) is provided with a lift for hooking and lifting up lithographic plates delivered by conveyors (12, 14), and a transfer device (24) for transferring lithographic plates to a transfer conveyor (30). The transfer conveyor (30) is provided with a gripper (40) for gripping a folded upper end (S1) of the lithographic plate, and cam mechanisms (50, 50') adapted to open and close the gripper at loading and unloading positions between the pickup and allocator. The allocator (60) includes a mechanism for allocating unloaded lithographic plates from the transfer conveyor (30) to shelves (62, 64).