Seal for disposable dust bags for vacuum cleaners

Abstract

Abstract An improved arrangement for substantially closing the small hole in the sheet rubber closure of the inlet of a disposable dust bag when the bag containing dirt is removed from a vacuum cleaner. The inlet to the bag is a generally circular opening formed in a stiff disc of cardboard or the like and of a size sufficient to receive an inlet conduit. This opening, except when the bag is in place in the cleaner, is substantially closed by a thin sheet of rubber formed with a small aperture. Prior to insertion of the inlet conduit, a pair of tongues extend side by side across the inlet opening from opposite sides thereof and are preferably integral with the cardboard disc. The opposite end of each tongue is connected to the disc by a small frangible section so that when the inlet conduit is inserted, it breaks these sections and bends the tongues inwardly, forcing them through the aperture which they enlarge, by stretching the rubber, sufficiently to receive the inlet conduit. The bags are made of filter paper and are frequently provided with a liner of filter material such as paper wadding for restraining fine dust from clogging the pores of the filter paper. This wadding is easily torn and hence the broken ends of the tongues should be rounded so as to avoid tearing the liner when the tongues enter the bag. When the conduit is withdrawn, preparatory to removing the bag after it has been filled with dirt, the tongues continue to extend through the aperture which contracts around them and consequently they substantially close the aperture.

Inventors

• 👤 Paul Emile Gaudry

Bibliographic Details