초록 ▼

The invention comprises a negative-pressure plastic bag leader in the form of a cylindrical chamber into which the plastic bag is received. The chamber is double-walled, an outer wall being imperforate, and the inner wall being foraminous, and the two being spaced apart, in a substantial concentrici

The invention comprises a negative-pressure plastic bag leader in the form of a cylindrical chamber into which the plastic bag is received. The chamber is double-walled, an outer wall being imperforate, and the inner wall being foraminous, and the two being spaced apart, in a substantial concentricity, to define an annular void therebetween. A closure caps the upper, open end of the chamber, and has a conduit in traverse thereof through which to admit gas, and refuse suspended in such gas into the chamber. Further, the closure has an aperture formed therethrough for communicating with a source of negative pressure, and for extracting gas from the chamber. The aperture opens into the chamber and also into the annular void. Accordingly, both the chamber and the annular void experience the same negative pressure, and the plastic, refuse-collecting bag is held securely in place against the inner wall of the chamber. Additionally, the chamber walls and the closure hold the uppermost end of the bag in position, and cooperate with the end of the bag to seal the chamber fully circumferentially thereof.

대표청구항 ▼

Separation-chamber means, for use in a negative-pressure, collection system, for collecting refuse, such as debris, particulate matter, and the like, comprising: means defining a chamber in which to collect refuse; said chamber having an imperforate outer wall and a foraminous inner wall; said walls

Separation-chamber means, for use in a negative-pressure, collection system, for collecting refuse, such as debris, particulate matter, and the like, comprising: means defining a chamber in which to collect refuse; said chamber having an imperforate outer wall and a foraminous inner wall; said walls being generally concentric defining an annular void therebetween; a separation-collection area formed within said foraminous inner wall; means for (a) admitting gas, and refuse suspended in such gas, into said separation-collection area, and for (b) discharging gas from said separation-collection area; wherein said outer wall has a bottom and an open top; said admitting and discharging means comprises means for admitting gas into said separation-collection area, as aforesaid, through said open top, and means for discharging gas from said separation-collection area, as aforesaid, also through said open top; and said discharging means comprises port means opening externally of said separation-collection area, and opening internally and commonly, onto both said separation-collection area and said annular void, through said open top.