A device for dispensing flexible sheet material, such as paper toweling, from a roll has a feed mechanism including a crank- or lever-operated roller having a drive section and a pressure element engageable with toweling extending around a portion of the roller. The pressure element is spring-biased...http://www.google.de/patents/US5294192?utm_source=gb-gplus-sharePatent US5294192 - Dispenser for rolled sheet material
