A device for collecting and packing paper material comprises a receptacle having a mainly square-shaped bottom, back and front walls, and two side walls. A box may be fixed either to the exterior surface of the back wall or to the exterior surface of one of the side walls for loosely retaining a...http://www.google.es/patents/US5690024?utm_source=gb-gplus-sharePatente US5690024 - Waste paper collecting device
