Dust filter bag for use in holding frame of vacuum cleaner, has openings and notches, which are arranged mirror symmetric towards longitudinal and transverse axes and/or around angle of specific degree symmetrical towards symmetric axis

摘要

The bag (10) has a plate carrier (12) comprising a rectangular contour with a longitudinal axis (x), a transverse axis (y) and a symmetric axis, which is perpendicular to a plane. The plane is made of the longitudinal axis and the transverse axis. Marginal openings (24) and notches (26) are arranged mirror symmetric towards the longitudinal axis and the transverse axis and/or around an angle of 180 degree rotationally symmetrical towards the symmetric axis. The notches lie on a connection axis that lies between the longitudinal axis and the transverse axis.