Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
  • G01N33/15—Medicinal preparations ; Physical properties thereof, e.g. dissolubility
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N1/00—Sampling; Preparing specimens for investigation
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
  • G01N3/40—Investigating hardness or rebound hardness
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
  • G01N2203/0014—Type of force applied
  • G01N2203/0016—Tensile or compressive
  • G01N2203/0019—Compressive
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
  • G01N2203/0058—Kind of property studied
  • G01N2203/0076—Hardness, compressibility or resistance to crushing
  • G01N2203/0087—Resistance to crushing
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
  • G01N35/02—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
  • G01N35/025—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations having a carousel or turntable for reaction cells or cuvettes

Definitions

• the invention relates to a tablet test station of the type referred to in the preamble of claim 1 , to a machine for testing tablets by means of the tablet test station according to claim 12, and to a method for testing tablets in such a tablet test station according to claim 13.
• Such tablet test appliances are used to meet the very high quality requirements, particularly in the pharmaceutical field.
• These appliances may be operated manually, either semi-automatically or fully automatically. For example, they measure weight, thickness, diameter, length and width, and hardness, that is to say breaking strength and breaking behaviour, of tablets using mechanical, electronic, optical, chemical or acoustic methods. Since tablets are provided in a wide range of forms, optimal and reliable positioning of a tablet relative to measuring apparatus in a respective method poses a great challenge to the developers and users of such tablet test appliances. This is true in particular if different test methods, which require different positionings of the tablet, are carried out on one tablet test station.
• Test stations for testing tablets including a receptacle for transferring tablets from an outlet of a feed device and at least one tester means for inspecting, testing and/or measuring the tablets, are described in the prior art.
• a method for measuring the thickness and hardness of test specimens, in particular tablets, and a rotary plate for this purpose are described in EP 1 531 317 A1. In that case, a test station with a rotary plate as a receptacle of tablets is described, these tablets being subjected thereon to a measurement method to establish length and diameter. The tablets are then lifted individually from the rotary plate by a pick-up and are put down in another test station.
• This method has a number of drawbacks. There are test stations of different design for different test methods. There are accordingly also different feeds or transfers. Each of these test stations requires space and generates additional costs. Each transfer costs time.
• a device for carrying out a hardness test, and a length, width, and height measurement of a test specimen, in particular of a tablet, in a single test station is described in DE 102008035830 A1.
• the device has a base plate as a receptacle for the transfer of the tablet from a feed device, and has means for inspecting, testing and/or measuring the tablet.
• the test station is shown with a pressure cell, a pressure plate, a stop piece and a laser measurement unit, in which the stop piece, sliding rails connected to a slider, and a spindle for displacing alignment pincers are arranged on the base plate.
• alignment pincers which have cavity-like openings with a recess for positioning of the tablet and which have a measuring gap.
• a table plate displaceable in the direction of the stop piece is provided for the tablet on the base plate.
• the pressure sensor is connected to the slider and to the pressure plate.
• the object of the invention is therefore to overcome the aforementioned drawbacks and to provide a tablet test station, which is simpler and more convenient in terms of design and in which tablets of any shape may be positioned in a highly accurate manner and different test methods may be carried out at maximum speed.
• a lifting device for moving the receptacle relative to the feed device, for transfer of the tablets therefrom, is provided and is formed in the manner of a lift.
• This lifting device is particularly advantageously formed in combination with specifically formed feed devices and/or with a pivotable receptacle for tablets, as described in the Applicant's commonly owned Application no. PCT/IB2012/055735 claiming priority to prior application EP1 1 186470.8 filed on October 25, 201 1 and titled “Tablet Testing Device” filed on the same date as the present Application, the entirety of which is incorporated herein by reference, as to all its parts, for all intents and purposes.
• This commonly owned Application no. PCT/IB2012/055735 which designates the U.S. forms an integral part of the present application.
• the lifting device is associated with economic and technical improvements. It allows adapted-to-the-process, precise positioning, of any conceivable tablet within the shortest time and, in principle, is conceivable with any test method and with any type of automatic feed.
• automatic feed is understood to mean any type of feed which is not carried out purely manually.
• a specific advantage of the invention lies in the fact that the receptacle for the tablet may be moved very close to the outlet of the feed device so that the tablet to be transferred does not fall onto the receptacle in an uncontrolled manner and lie at any point thereon, as in the prior art, but is already positioned for the (preferably first) test method.
• a further advantage of the invention lies in the fact that the tablet may be positioned as close as possible to the fixed jaw. Time- consuming displacement of the tablet during the subsequent measurement process therefore is not necessary, and the risk of the tablet rotating may be ruled out.
• the lifting device advantageously has a motor, which particularly
• the means for inspecting, testing and/or measuring the tablets is formed as a length and/or width and/or thickness measurement device or sensor, which preferably has at least one positioning face for positioning the tablet on the receptacle.
• This means for inspecting, testing and/or measuring is particularly preferably an optical sensor arrangement, since this operates quickly and precisely.
• the means for inspecting, testing and/or measuring is formed as a breaking strength measurement device or sensor and/or as a device for testing breaking behaviour.
• the breaking strength measurement device comprises a breaking device, which has at least one positioning face for positioning the tablet.
• the employment of at least parts of means for inspecting, testing and/or measuring as positioning faces reduces the number of additionally required positioning faces, for example on the receptacle.
• the receptacle has at least one positioning face for positioning the tablet, this face being formed as a deflector in a particularly preferred embodiment. This allows simple and quick positioning of the tablet.
• the receptacle is formed as at least one flap. This can likewise be pivoted for positioning of the tablet for a test method and for discharge of the tablet from the tablet test station.
• a tablet test station according to the invention may be s advantageously used in a machine for testing tablets, such machine including a plurality of preferably different tablet test stations and/or other apparatuses, such as a feed device.
• the preferred method for testing tablets using a tablet test station or using a machine comprising a tablet test station comprises the steps of moving the receptacle, for transfer of the tablet, via the lifting device into a position adjacent to the feed device, transferring the tablet from the feed device to the receptacle, and then moving the receptacle into at least one second position to carry out tests. Tests are to be understood in this context to also include inspections and measurements.
• the lifting device most advantageously moves the receptacle for transfer of the tablet into a first position so that the distance of the receptacle from the outlet of the feed device is greater than the thickness of the respective tablet to be inspected, but preferably as close as possible. In some cases this first position could even be chosen in a way that the distance of the receptacle from the outlet of the feed device is smaller than the thickness of the respective tablet to be inspected.
• the feed device is thus able, depending on the design thereof and the form of the tablet, to position the tablet on the receptacle at a predefined point with precise orientation. So as to achieve the best result in this regard, the feed device is provided with outlets which outlets enable defined positioning.
• Transfer and the subsequent test method(s) may be carried out with the lifting device in a manner, and in particular at the height within the machine comprising a tablet test station or test station, as provided for originally by design.
• the lifting device thus constitutes a relatively simple and, compared to a new design of a tablet test station or of an entire machine comprising a tablet test station for optimisation purposes, a cost-effective improvement to the design-induced drawbacks of tablet test devices comprising feed devices, this lifting device in particular also being suitable for retrospective installation in a machine including a tablet test station.
• the tablet is discharged from the tablet test station upon conclusion of the method, whether it is to be subjected to a further test method or whether it is to be disposed of. [0031]
• the list of reference labels forms part of the disclosure.
• Figure 1 - shows a schematic view of a first exemplary embodiment according to the invention of a tablet test station
• Figures 2 - 5 show an exemplary embodiment according to the invention of a tablet test station during various phases of the method carried out therein.
• arrangements according to the invention are described in an exemplary machine via a preferred embodiment of a tablet test station which inspects length, width and hardness, that is to say breaking strength and/or covering behaviour, but are in no way limited to this specific tablet test station.
• Figure 1 shows a tablet test station 1 1 comprising a lifting device 20, the controller 17 of which passes on to the drive, in particular a motor 27 (although another drive means or drive devices, for example a pneumatically operated device would also be conceivable) of the lifting device 20, positions for the receptacle 15, into which it is moved for transfer from the feed device or to carry out a method step during inspection, testing and/or measurement of a tablet and in which it is held during the respective method step.
• a lifting device 20 the controller 17 of which passes on to the drive, in particular a motor 27 (although another drive means or drive devices, for example a pneumatically operated device would also be conceivable) of the lifting device 20, positions for the receptacle 15, into which it is moved for transfer from the feed device or to carry out a method step during inspection, testing and/or measurement of a tablet and in which it is held during the respective method step.
• the receptacle 15 for a tablet 12 is movable in this case, formed as a flap with a positioning face 26 and a deflector 23. It is shown with its separate drive 19, with which it is moved vertically and jointly by the lifting device 20.
• a breaking device 24 is provided, which includes a fixed breaking jaw 14 and a displaceable breaking jaw 16.
• the fixed breaking jaw 14 has a positioning face 22.
• the displaceable breaking jaw 16 has a positioning face 21 .
• the displaceable breaking jaw 16 is displaced over the receptacle 15 in the direction of the fixed breaking jaw 14, both for positioning of the tablet 12 for the measurement method(s) and for a breaking strength test on the tablet 12, or to inspect the breaking behaviour.
• the positioning face 21 abuts the tablet 12 and, provided the tablet is not already positioned against the fixed breaking jaw, which is generally desired, displaces it until it abuts the positioning face 22 and is oriented at right angles to the fixed breaking jaw 14. A width, length and/or thickness measurement is then taken on the tablet by means of a measurement device 25.
• the tablet 12 is then brought into a perpendicular position relative to the fixed breaking jaw 14, preferably by at least one pivotal movement of the receptacle 15 or, if the receptacle 15 is formed in two parts, by a pivotal movement of the receptacle faces into a V-position in relation to one another.
• the breaking strength or breaking behaviour test is then carried out, in which the positioning face 21 of the displaceable breaking jaw presses the tablet 12 against the fixed breaking jaw 14, wherein the tablet may break.
• the tablet 12 or the broken parts thereof is/are then removed from the tablet test station 1 1 , preferably by pivoting the receptacle 15.
• Figures 2 to 5 depict different phases of the (above-described) test method. Particular notice is paid to the feed device.
• the tablet may be transferred by means of any known feed device.
• the described lifting device is particularly advantageous for feed devices of which the transfer point, that is to say the outlet or the like, for design reasons is distanced relatively far during the feed process from the face which is to receive the tablet for at least the first test method.
• FIG. 2 depicts the transport of a tablet 12 to the receptacle 15 by means of a feed device 13.
• the feed device 13 is illustrated in a preferred embodiment in the form of a rotary plate 28.
• any other type of preferably automatic feed device is equally conceivable, for example a linear conveyor.
• the rotary plate 28 is illustrated by way of example in each of figures 2 to 5 with a plurality of rectangular outlets 18, 29, 39, which are formed as recesses. Of course, any other appropriate shape of the outlets 18, 29, 39 is also conceivable.
• the rotary plate 28 has outlets which are shaped in such a way that they are adapted to put down tablets in the position ideal for the subsequent method. While the feed device 13 conveys the (next) tablet 12 to the receptacle, the lifting device 20 (not shown here) is held at a height which allows the smallest possible spacing of the receptacle 15 from the feed device
• the displaceable breaking jaw 16 is held at a distance from the fixed breaking jaw
• This movement places the receptacle 15 so far downwards relative to the feed device 13 that a test method, for example a method for establishing length, width or thickness, is carried out within the tablet test station 1 1 at the design-induced height of the measurement apparatuses and the tablet 12 may be positioned accordingly.
• a test method for example a method for establishing length, width or thickness
• Figure 5 depicts how the displaceable breaking jaw 16 has displaced the tablet 12 for breaking strength inspection in the direction of the fixed breaking jaw 14 or how the tablet could already be so positioned without displacement.
• the lifting device 20 holds the receptacle 15 in the same, lower position as shown in figure 4. If the tablet 12 has then been discharged from the tablet test station 1 1 , the lifting device 20 again moves upwardly relative to the feed device 13, as described in figure 2.
• the individual details described in conjunction with the figures may also be provided in the other embodiments that lie within the scope of the patent claims.

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• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• General Physics & Mathematics (AREA)
• Physics & Mathematics (AREA)
• Immunology (AREA)
• Analytical Chemistry (AREA)
• Pathology (AREA)
• General Health & Medical Sciences (AREA)
• Biochemistry (AREA)
• Engineering & Computer Science (AREA)
• Biophysics (AREA)
• Medicinal Chemistry (AREA)
• Food Science & Technology (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Pharmacology & Pharmacy (AREA)
• Molecular Biology (AREA)
• Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
• Length Measuring Devices By Optical Means (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)

Priority Applications (3)

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Publications (2)

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Citations (4)

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• 2011
  • 2011-10-25 EP EP11186472.4A patent/EP2587261A1/de not_active Withdrawn
• 2012
  • 2012-10-19 WO PCT/IB2012/055740 patent/WO2013061226A1/en not_active Ceased
  • 2012-10-19 US US14/344,066 patent/US9389213B2/en active Active
  • 2012-10-19 JP JP2014537776A patent/JP6086921B2/ja active Active
  • 2012-10-19 EP EP12794500.4A patent/EP2776828B1/en active Active

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