Conveyors: power-driven – Conveyor system for arranging or rearranging stream of items – By queueing items from quantity source of items into stream...
Patent
1985-09-09
1987-04-28
Valenza, Joseph E.
Conveyors: power-driven
Conveyor system for arranging or rearranging stream of items
By queueing items from quantity source of items into stream...
198741, 198453, B65G 4712
Patent
active
046607137
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a transport unit for tablets fed to the transport unit by a filling unit.
Such transport units are needed for example in testing apparatuses or packaging units for tablets.
In any case it is required that the transport unit supply only one tablet to the testing station, for example a balance, or to the packaging unit. One must know that if the transport unit supplied two tablets simultaneously for example to a balance or to a packaging unit for single item packaging, this would result in measuring a wrong weight, and two tablets instead of one would be packed.
In a known transport unit for tablets it is not in any case guaranteed that only one tablet is supplied to the tablet testing stations and/or to a packaging unit. In the known transport unit the filling unit for tablets consists of a funnel tube, the outlet of which is in connection with a inclined plane allowing the tablets to get to the transport unit. The outlet is closed by a swinging shutter. Thus, the tablets successively pass the outlet and get to the transport unit by travelling along the inclined plane. Under certain circumstances, however, it may happen that two tablets simultaneously pass through the swinging shutter, jointly fall upon the transport unit and, lying side by side, are transported by a V-shaped fork of the transport unit for example to a balance.
SUMMARY OF THE INVENTION
It is the object of the invention to further develop a transport unit for tablets in such a way that it is under any circumstances guaranteed that in one operation only one tablet is transported by the transport unit.
According to the invention this object is achieved by the features set forth in detail below. The basis of the invention is the knowledge that the tablet is always adjacent in the area of the point of the "V" of the rake whereas two tablets simultaneously getting upon the guiding track are transported side by side so that the tablets are adjacent in the V-shaped fork only in the area of its side walls. In other words, whenever more than one tablet is transported at the same time, with the exception of at most one tablet, the tablets are transported outside the area, into which the V-shaped fork transports a single tablet.
Through the openings, which are according to the invention provided outside the guiding track, namely on either side of the guiding track, the superfluous tablets fall from the guiding track. The openings are so dimensioned that the tablet which is adjacent at the point of the "V" of the rake is safely transported through the openings.
Further developments of this innovation are shown in the subclaims.
The openings in the guiding track are connected with a collector container by means of an inclined plane. Thus the tablets that were not further transported by the transport unit may be for example anew fed to the transport unit through the filling unit.
Due to the unsymmetrical arrangement of the openings in combination with the narrowing of the outlet between the openings in the transport unit it can be avoided that in those cases, when two tablets are transported simultaneously, both tablets fall through the openings from the guiding track, so that no tablet is supplied for example to a packaging unit.
BRIEF DESCRIPTION OF THE DRAWINGS
Hereinafter the invention is more in detail described by an embodiment with reference to the drawings, in which
FIG. 1 shows a partly broken up view of a tablet testing apparatus with a transport unit according to the invention,
FIG. 2 a cross-section through the apparatus shown in FIG. 1 (close to II--II in FIG. 3) and
FIG. 3 a plan view upon the apparatus shown in FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The tablet testing apparatus shown in FIG. 1, 2 and 3 shows in a manner, which is known per se, a balance 1, a thickness gauge 2 as well as a gauge for strength test 3 for smashing the tablets. The various testing stations as well as the transport of the tablets between the testing stations are controlled by an elec
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Erweka Apparatebau GmbH
Holmes Jonathan D.
Valenza Joseph E.
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