Dust filter bag for vacuum cleaner, has receiving opening formed in bag wall toward air inlet opening, and sealing element made of flexible material, where diameter of receiving opening is smaller than or same as diameter of inlet opening

摘要

The bag has a single-layered or multi-layered bag wall (2) made of filter material, and an air inlet opening (3) formed in the bag wall. A planar sealing element (4) with a receiving opening (5) is provided at an inner side and/or an outer side of the bag wall. The receiving opening is formed in the bag wall toward the air inlet opening in an aligned manner, where diameter of the receiving opening is smaller than or same as diameter of the air inlet opening. The sealing element is made of flexible material, and includes strength of 0.1-0.5 mm.