Patent ID: 8479356

Claim:
A vacuum cleaner filter bag comprising an inlet opening, a retaining plate, situated on the exterior of the bag in the vicinity of the inlet opening and configured for attachment to a retaining device of a vacuum cleaner, and a closing device situated in the vicinity of the inlet opening, the closing device having a first position when the vacuum cleaner filter bag is not inserted into the vacuum cleaner, and a second position when the vacuum cleaner bag is inserted into the vacuum cleaner, the closing device in the second position comprises at least one closing surface opposite the inlet opening, wherein the inlet opening is closed in the first position of the closing device and is open in the second position of the closing device, and wherein the closing device in the second position comprises two trapezoidal or rectangular closing surfaces which, starting from the inlet opening, converge towards each other in a wedge and are interconnected at a connection edge opposite the inlet opening.