Vacuum cleaner filter bag has bag wall and holding plate, where opening is formed in holding plate and opening is covered by flap valve, and opening edge is formed over fifty percent or more of combined area

摘要

The vacuum cleaner filter bag has a bag wall and a holding plate. An opening is formed in the holding plate. The opening is covered by a flap valve. The opening edge is formed over 50 percent or more of the combined area made of a soft plastic, which has a thickness in millimeter rage.