| 摘要 |
An open-ended paper bag of a self-sealing dust receptacle for a vacuum cleaner is closed by an end plate having an elastic membrane extending across an opening therein. An elongated tongue fixed to the end plate overlies a central portion of the membrane and covers an aperture therein which is smaller than the opening in the end plate. The tongue has a diagonally extending cut which is at an acute angle to its longitudinal axis and defines two fingers having overlapping outer pointed ends operable to move through the aperture and swing inward from the plane of the plate by force applied thereto. With cessation of such force the fingers are biased toward the plane of the plate by the elastic membrane and close the aperture in the membrane. |
