A seal-forming device for a replenishment toner receiving aperture of a development apparatus includes a resilient member mounted to the development apparatus and around the aperture. The seal-forming device also includes a woven fabric that is mounted to the resilient member and to a part of the development...http://www.google.com/patents/US5303008?utm_source=gb-gplus-sharePatent US5303008 - Seal-forming device for a toner receiving aperture
