Can you scale blister packs

The powders packaged in such blister packs can be highly effective drugs. This then regularly requires very small permissible weight deviations from a predetermined target weight of the powder packed in a single blister pack. Waagen, die sehr genau auch im Mikrogramm-Gewichtsbereich arbeiten, sind bekannt.

Basically, such scales could also be used to check the correct amount of airtightly packed powders in blister packs. In practical tests, however, extremely different weighing results have been obtained with comparable blister packs. In medical technology in particular, however, only weight deviations of a few percent of the fill weight are tolerated.

Based on this prior art, the invention has for its object to provide a scale for weighing blister packs of the type mentioned, in which very small weight deviations in the order of about 0. Diese Erfindung ist durch die Merkmale des Anspruchs 1 gegeben. This invention is given by the features of claim 1. Further developments of the invention are the subject of subsequent further claims. The invention is based on the knowledge that the very large weight differences that have occurred in practice are not caused by correspondingly large different amounts of powder stored in each case, but by static charging of the weighed blister packs.

The blister packs are in fact regularly made of a material - also a multi-layer material - the components of which consist of electrically chargeable plastic material or at least contain such material. According to the invention, in order to check the correct amount of powders to be packed airtight in blister packs, the weighing plate of the relevant scale is designed in such a way that the resulting field forces act practically exclusively on the weighing plate. These field forces are caused by an electric field, which is generated by an electrically charged blister pack lying on the weighing plate of this weighing machine.

The field forces generated by the electrical charging of the blister pack thus act on the weighing plate and are thus neutralized in their effect on the weighing result. This is because these forces cannot act on foreign, stationary parts of the scale with regard to the scale plate and its support.

It has proven to be advantageous to provide the weighing plate with a body which is designed in such a way that it can interact with an electrical field emanating from the blister pack. Such a body is preferably grounded in order to conduct the electrical field harmlessly. According to a particularly advantageous development of the invention, the body is designed as a plate or in particular as a cage. In the latter case, the cage is arranged spatially to the weighing plate and attached to it, that the blister pack to be weighed in each case can be placed inside the cage.

In contrast to a plate, the cage shape has the advantage that the field forces can be absorbed by the cage in practically all directions and thus ineffectively for the weighing result. The cage is advantageously provided with an opening through which the at least one blister pack to be weighed can be inserted or removed from the cage. The weighing plate is designed as a three-point support for the blister packs to be weighed in order to hold the weighing goods in a stable manner.

Provide weighing plates so that this housing can serve as a draft shield for the at least one blister pack lying on the weighing plate. This windproof housing is preferably made of grounded metal or electrically conductive vapor-deposited glass. Alle Blisterpackungen dieser Serie werden nur dann als gute, d. Of a series of blister packs to be packed airtight with powder, only a certain percentage of these blister packs are checked in-process control by destructive testing.

This means that only a subset of blister packs will be checked. All blister packs in this series are only considered good, i. If the tolerance value is exceeded, the entire series of blister packs is sorted out. Danach wird das Nettogewicht dieser zumindest einen Blisterpackung ermittelt. Andernfalls, wenn das The airtight envelope of the at least one blister pack to be checked is at least opened or destroyed to such an extent that the powder is no longer packed airtight.

This has the advantage that any air pressure or air pressure in the blister pack, which could falsify the result, are eliminated. The next step is to determine the gross weight of this at least one blister pack and then remove the powder from the packs. The net weight of this at least one blister pack is then determined.

This net weight, which results from the difference between the gross and tare weight, is compared with the nominal weight of the powder weight to be filled into a blister pack. If the net weight does not fall below or exceed the target weight, which has been reduced or increased by a tolerance weight, this blister pack, which was originally packed and checked with powder, is evaluated as a so-called good blister pack.

Otherwise, if that. Tolerance weight is not maintained, just like this checked blister pack, the other blister packs in this series are not considered good ones, i.

Further refinements and advantages of the invention can be found in the features further specified in the claims and in the exemplary embodiment specified below. Es zeigen: The invention is described and explained in more detail below with reference to the embodiment shown in the drawing.

Show it:. Durch jede dieser drei Aussparungen 22, 24, 26 ragt ein Bein A scale 10 has a scale plate in the form of a tripod 12, which is present at the end of a plate rod A square cage 18 is fastened on the plate rod 14 on a support 16 which projects upwards. There are three cutouts 22, 24, 26 in the base plate 20 of this cage Through each of these three A leg The tips 28, 30, 32 of the tripod 12 thus end in the interior 34 of the cage Die drei Beine Die Aussparungen 22, 24, 26 brauchten dann nicht vorhanden zu sein.

The cage has a base plate 20 and a cover plate 36 as well as two side walls 38, 40 connecting these two plates 20, On the rear side, the cage is closed by a rear wall The cage is open on the front 44 opposite the rear wall A blister pack 50 can be inserted through this front side 44 into the cage 18 and placed there on the three legs The necessary handling of the blister pack 50 takes place by means of pliers 52, the two clamping jaws 54, 56 of which are shown schematically in FIG.

The three legs The cutouts 22, 24, 26 then did not need to be present. Im eingelagerten Zustand wird das Pulver 60 durch eine obere The blister pack 50 has a trough-shaped recess 58 in which powder 60 can be stored.

In the stored state, the powder 60 is replaced by an upper one. Folienschicht 62 der Blisterpackung 50 verschlossen, so dass das Pulver 60 dann luftdicht in der Vertiefung 58 eingelagert ist.

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Well good for them. No scaling isn't technically wrong but it's still kinda douchey. Ultimate board. User Info: FabIe. No, what's douchey is printing countless, worthless cards in packs and make the expensive ones exclusive to lucky people or people willing to pay insane amounts of money on a card game.

Play what you love and the damage will come. User Info: Starburstman Some Rares have a slight bend to them to give off the weight that it could be a holo. Of course Scaling is a lot more consistent than buying random packs thats for damn sure FabIemaster posted Yet, no one is forcing you to play. D-Do you even No idea what you're on about, mate. User Info: alkemypirate. Your tone is so freaking hilarious. He's completely right. More topics from this board