Fluent material handling – with receiver or receiver coacting mea – Multiple passage filling means for diverse materials or flows – With gas expanded seal
Reexamination Certificate
1999-06-28
2001-08-07
Maust, Timothy L. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
Multiple passage filling means for diverse materials or flows
With gas expanded seal
C141S059000, C141S065000, C141S263000, C141S275000, C141S276000, C141S285000, C141S287000, C141S31100A
Reexamination Certificate
active
06269852
ABSTRACT:
The invention in question concerns a loader for filling tank-shaped containers (
1
) with bulk material with the characteristics described in the characterising clause of patent claim
1
.
A loader is known to the state of the art that lays loading nozzles situated downstream loose on the opening of the tank-shaped container to be filled.
A loader of this kind has the particular drawback of considerable loss of dust through the gap between the opening of the container and the loading nozzle.
This loss of dust can lead to significant environmental pollution, to risks to the health of the operating staff and to a deterioration in safety in the workplace.
One further disadvantage of a loader of this kind consists of the fact that residues of the bulk material in dust form often accumulate in the nozzle clearance area between the loading opening of the tank-shaped container and the loading nozzle. This is especially serious, in particular from the standpoint of significant cleaning costs and in terms of hygiene and ascertaining quality.
A loader with a loading bellows is also known to the state of the art.
After the loading bellows has let the bulk material out, residues of the bulk material often remain caught in its side pleats, especially when the bulk material is in powder or dust form.
These bulk material residues in the pleats of the loading bellows are particularly serious from a point of view of hygiene in the case of foodstuffs. The formation of mould, fungal attacks and decomposition with alteration of flavour often result.
In the case of avidly reactive materials, there is moreover the danger of ignition or explosion if the residues in the pleats of the loading bellows come into contact with the oxygen in the air.
In addition to this, hygroscopic bulk material may result in the formation of a glutinant oily residue that is difficult to remove.
In the case of a change in production, the bulk material residues caught in the pleats of the loading bellows often lead to impurities in the new product. When differently colored color dusts or chemically mutually reactive materials are loaded, this is a great disadvantage.
In order to dedust a very small proportion of the bulk material residue from the loading fittings, the loading equipment according to the state of the art uses for example a vibrator, which is employed on the loading nozzles provided downstream from the loading bellows at the connection to the loading process.
However, the use of a vibrator at the loading nozzles leads to the serious disadvantage that large amounts of bulk material residue remain inside the loading fittings, especially in the side pleats of the loading bellows.
The task of the invention in question is thus to provide a loader for filling tank-shaped containers with bulk material that does not suffer from the problem of a loss of dust through the gap between the loading opening of the container to be filled and the loading nozzle and which enables the loading fittings, especially the side pleats of the loading bellows, to be dedusted practically entirely, so as to leave no bulk material residues, with a simple construction and in an economic manner.
According to the invention, this task is undertaken with a generically suitable device by means of the characteristics described in the characterizing part of Patent claim
1
.
Particularly preferable embodiments are the subject of the subsequent claims.
REFERENCES:
patent: 3799223 (1974-03-01), Feneziani
patent: 3958700 (1976-05-01), Foy et al.
patent: 4703782 (1987-11-01), Henkel, Sr.
patent: 4872493 (1989-10-01), Everman
Domingue & Waddell PLC
Maust Timothy L.
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