Fluent material handling – with receiver or receiver coacting mea – With conveying means to supply successive receivers – With lateral motion of registering head and receiver
Reexamination Certificate
2003-04-04
2004-11-16
Mancene, Gene (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
With conveying means to supply successive receivers
With lateral motion of registering head and receiver
C141S069000, C141S072000, C141S256000, C141S286000
Reexamination Certificate
active
06817389
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to the technical field of automatic lines for processing powdery, granular and similar substances, with particular reference to outlet units aimed at filling corresponding containers and/or bottles.
FIELD OF THE INVENTION
As regards the feeding of variable granulometry dosed substances, such as powders and/or granules, into corresponding containers, devices are well known to the men skilled in the art, which are capable of determining with high accuracy the fixed dosed amount, and which at their end sections are provided with suitable outlet units.
Such outlet units are conventionally formed of passage tubes, freely crossed by the fixed flow of doses, draining by suitably sized nozzles adapted for being inserted into, or facing, the mouths of the containers, for feeding them.
In the event of dosing of fixed amounts of granular and/or powdery substances, due to particularly small outlet sections of the end nozzles, so-called “bridges” may form into the corresponding passage tubes, that is, agglomerates of substances that hinder almost completely the flow of the same substances through the end nozzles.
The phenomenon that causes the formation of “bridges” and/or agglomerates into the passage tubes is strictly related to the nature and to the volume of the dosed substances, as well as to the chemical and physical working conditions inside the tubes themselves.
Such phenomenon is particularly frequent and burdensome when the container inlet sections and thereby the corresponding nozzle outlet sections are particularly small.
The situation is further worsened when particularly short times for filling the containers are required.
The difficulties of flow of the powdery and/or granular substances inside the tubes cause a considerable slowing down of the container filling step, and in some cases they even cause a stop of the flows of doses directed therein, with a further accumulation and clogging of the passage tubes.
Besides affecting the proper operation of the outlet units and of the associated packaging lines, discontinuous flows of the powdery and/or granular substances through the end nozzle outlet sections strongly limit the plant production rate and provide no guarantee as to the proper filling of the containers.
Such problems are especially felt in the food and pharmaceutical industry, where granular and/or powdery substances require an accurate dosing into the containers.
As a consequence, a reduction of the container inlet sections implies a reduction of the end nozzle outlet sections, with a high probability of formation of “bridges” and agglomerates into the passage tubes, and with a considerable limitation to the performance of the outlet units and of the packaging lines associated to them.
SUMMARY OF THE INVENTION
Object of the present invention is that of proposing a unit for feeding substances, in particular powdery, granular and similar substances, to corresponding containers, which should be capable of overcoming the disadvantages mentioned above and ensuring an optimum flow through the end sections of the same outlet unit, irrespective of the volume of the doses and of the nature of the substances.
A further object of the present invention is that of proposing a unit capable of limiting and preventing the formation of “bridges” and/or agglomerates by the treated powdery and/or granular substances, so as to ensure a proper filling of the corresponding containers.
Moreover, a further object of the invention is that of proposing an outlet unit which ensures high reliability and productivity standards in any working condition, irrespective of the nature of the dosed substance and of the chemical and physical working conditions into the same unit.
The above objects are achieved, according to the contents of the claims, by a feeding unit for feeding powdery and/or granular substances to containers, including:
a main body with an inlet mouth and a bottom portion, for receiving and conveying a flow of said substances;
one end nozzle joined to said bottom portion of said main body and designed for feeding said substances to said containers; the feeding unit further including:
conveying and stirring means turnably supported by said main body and extending inside said main body at least up to a region close to said end nozzle, for preventing formation of agglomerates into said flow of powdery and/or granular substance;
driving means for driving in rotation said conveying and stirring means with respect to said main body and in a space comprised within said main body and said end nozzle.
REFERENCES:
patent: 2839111 (1958-06-01), Mitchell
patent: 4693285 (1987-09-01), Chang
patent: 5950869 (1999-09-01), Wegman
patent: 1 032 301 (1966-06-01), None
patent: 2001 002224 (2001-01-01), None
Coleman Sudol Sapone P.C.
deVore Peter
Mancene Gene
Sapone William J.
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