Patent ID: 6857161

Claim:
A dust withdrawing arrangement, comprising a plurality of individual enclosures each having an inner space for receiving a respective one of work stations from which dust has to be removed; a common enclosure which is arranged around said individual enclosures; means for creating a negative pressure in an interior of said common enclosure; and passage means for withdrawing dust from said inner space of each of said individual enclosures exclusively into the interior of said common enclosure without communicating with the inner spaces of other individual enclosures, said individual enclosures including at least two neighboring individual enclosures, said passage means including a gap communicating the inner spaces of said two neighboring individual enclosures with the interior of said common enclosure and having portions through which the dust passes from one of said two neighboring individual enclosures and a joint passage formed as a space between walls of said two neighboring individual enclosures, so that the dust from said inner spaces of said two neighboring individual enclosures is withdrawn through said portions communicating with said inner spaces of said two neighboring individual enclosures and then through said joint passage which communicates with said portions and also communicates with the interior of said common enclosure.