A sheet dispenser prevents misuse by inhibiting operation with incorrect roll

摘要

A roll dispenser housing 10 retains a roll having a corresponding key 20, 52 formation on its end. The correct key formation interacts with a the housings end, moving plate 40 which affects performance of the dispenser. Ideally plate 40 extends lug 60 to inhibit closing of the lid unless a roll with the correct key is inserted. The lid preferably has a blade to cut sheets from the roll. The plate 40 can be moved by sleeve 58 around a stub axel, or a button 144 (fig 11) adjacent it. The plateâ s movement may be guided by fins 44 sliding in slots 54. There is preferably a lever 80 in a socket of that axel having a latching pin 82 engaging with hook 66 which prevents movement of the plate until lever 80 is moved by an inner projection 52 of the key. Ideally the key is a roller end cap having coaxial projections 20, 52. The plate can be biased towards the locked position.