Patent ID: 7937803

Claim:
In a dust collection system for collecting production dust from a source that generates such dust in a production operation, and storing said dust in a film collection bag liner within a dust collection barrel at a collection station remote from said dust source; the dust source comprising means for exhausting the dust entrained in a stream of air; a conduit coupled between the dust source and the remote collection station conveys the stream of air and the dust entrained therein to the collection station; the collection station comprising a barrel having a side wall and a bottom and a flexible film bag liner therein into which the dust is collected, the liner being a barrier to dust and air to contain the dust and permit easy removal of the dust, wherein the bag liner is adapted to being lifted out for disposal of the collected dust; separator means mounted above said barrel for separating out the dust from said stream of air, such that the dust falls into said barrel while the stream of air continues and flows to a pump and filter arrangement that generates a negative pressure to induce the stream of air to flow, with the air being filtered and returned into the ambient as clean filtered air, such that a negative pressure exists within said separator means, and such that said negative pressure exists also within the bag liner; and a vacuum hold-down arrangement which maintains a negative pressure between the bag liner and the wall and bottom of the barrel, the hold-down arrangement including a vacuum source producing a negative pressure of a magnitude greater than the negative pressure within said separator means; a vacuum hose extending from said vacuum source through a penetration in said barrel into an interior space of said barrel; and the improvement in which a porous pad, separate from said bag liner and formed of an open-textured material, is situated against a distal end of said vacuum hose within said barrel between said bag liner and said barrel, and serves to distribute air flow from the space between the bag liner and the barrel into the distal end of the hose.