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US 4,232,829 AGranted
Nozzle arrangement for encapsulating machines
AssigneeNone recorded
InventorRoland F. Gruber
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AssigneeNone recorded
InventorRoland F. Gruber
Estimating the term…
The invention relates to encapsulating machines and more especially to the device for putting the capsules in position in the encapsulation head. It consists in the creation in the air duct for propulsion of the capsules of one or more chambers for successive expansions of the air separated by nozzles the ratio of the bores of which is such that the incomplete expansion of the air is obtained in each intermediate chamber and the expansion is complete at the output in the ambient air. In one embodiment the cross-section of the outlet nozzle appears in the form of a flattened tube and the expansion chamber is filled with an acoustic insulation material. (FIG. 4). In another embodiment, a plurality of channels surround the outlet nozzle which communicate with the atmosphere and thereby introduce air into the outlet nozzle, providing a continuous circulation of air round the device. (FIG. 6).
A device for putting capsules in position in the encapsulation head of an encapsulating machine comprising at least one expansion chamber, inlet means for feeding air under pressure to said expansion chamber and tubular air outlet means, said device being provided with further air inlet means connected to the atmosphere, said further air inlet means being effected and arranged so that a zone of air at overpressure is created at the outlet from the tubular air outlet means, a slight depression is obtained in the expansion chamber owing to the suction produced by the air introduced into said tubular air outlet means and that a continuous circulation of air takes place round the device.
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
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Term ended 20 Sep 1998 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention refers to improvements applied to encapsulating machines and especially to the device for putting capsules in position in the encapsulation head.
Known encapsulating machines comprise, in general, a capsules distributor from which the capsules are brought one by one by way of a curvilinear path which passes from the vertical to the horizontal and ends at the encapsulation head. At the end of this descending course, the capsules are subjected to a jet of air under pressure in order to propel them into the encapsulation head.
In the existing machines this propulsion is achieved by an air duct under pressure equipped with a nozzle through which the air escapes at high velocity, which causes a disagreeable noise which may reach 120 to 130 dB.
In order to understand the invention better practical embodiments will be described below by referring to the figures in which:
FIG. 1 is a diagram of a nozzle of the prior art showing the location of the various components of the equations established above:
FIG. 2 is a diagram of a nozzle arrangement according to the present invention showing the location of the various components of the equations established above:
In FIG. 3 there is shown at 10 the capsule distributor of an encapsulating machine constructed in accordance with existing techniques.
From this distributor 10 the capsules are brought into a curvilinear duct 11 passing from the vertical towards the horizontal. At the end of their descent the capsules 12 are subjected to a jet of air under pressure brought through a duct 13 and passing through a nozzle 14. Under the action of the thrust created by this air jet the capsule 12 is put into position in the encapsulation head 15.
In accordance with the invention and as shown in FIG. 4 this capsule propulsion device has been arranged as follows: the air duct under pressure 13 ends at a first nozzle 16 through which the air enters an expansion chamber 17. This chamber 17 has in turn an outlet to the ambient air by way of a second nozzle 18.