DE1956873A1 - Method and device for measuring coloring materials - Google Patents

Description

nq. Ηβίηι UiW ₁ Potentanwalt D - 8 MOndien 81, Coiimqstrq | j 8T - Telefort. (0811) 48 38 20

Kanegafuchi Boaeki Kabushiki Kaisha November 12, 1969

3-26, Tsutsumidori 3-chome, Sumida-ku L / to

Tokyo, Japan L8903

Method and apparatus for measuring coloring materials.

The invention relates to a method and an apparatus for successive measurement of a coloring material granulate with accuracy and speed,

Coloring materials are used in various areas, such as for example when dyeing, printing or coating with paint of plastics. For example, there is sneezing when dyeing textile products the coloring material, such as dyes and pigments, especially in the form of powder, granules, liquid or paste given up. The dyeing material is applied to the textile products either individually or in a mixture of two or more ingredients after removing a required amount of the dye material a suitable type of measurement applied. The granulate or the liquid is expediently measured either by a weighing or a volumetric measuring process.

In general, the coloring material is measured by a weighing operation because the amount of coloring material to be applied is measured with a

00 9821 / 03AO

Dipi.-lnf. Hw'nx Um «. Potenlonwolt D-B Munich 81st Gximattrag · 81 Τ · Μοη / (0611) 48 38 20

must be measured with a high degree of accuracy, since the coloring effect is subjected to an examination by the naked eye, which is determined by the five senses is most accurate and most sensitive. There is also a general opinion that the accuracy of the weighing process is greater than that of the volumetric method of measurement.

Attempts have been made to determine the reasons for this are responsible that, even if the weighing process is used to measure the coloring material, the color effect achieved differs from the the desired color still differs slightly. It was found on the basis of these experiments that the powdery coloring materials, especially dyes, tend to absorb a lot of moisture from the atmosphere if used over a long period of time are stored, and that therefore the content of the effective coloring constituents in the material according to the moisture content changes. Due to such moisture absorption, the moisture content of a wet coloring material was up to 10 to 25% by weight. Even if the wet coloring material is accurately measured, the resulting amount is the effective coloring ingredient in the dye material is not always accurate, as the moisture content in the coloring material according to the change in atmospheric Humidity changes.

In practice, it is in the areas of application mentioned at the beginning rarely that only one kind of coloring material is used, usually two or more kinds of coloring material are used in one Mixture used. In addition, contamination of the Dye materials are prevented to produce the desired color effect to achieve. "

009821 / OUQ

• breathe — H D - 8 M * M * «n 8t Cmimaitra» · 81 telephone; (0811) 48 38 20

With the Μ · ιι · η of the color material Ut «· it is therefore necessary to Prevention of contamination of the · dyeing material · to change the measuring devices used for each · dyeing material or to clean. Such changing or cleaning is very

ae it rough and therefore quickly affects you in a high maggot ongoing measuring process.

The invention is based on the object of a method and a To provide apparatus for measuring a given amount of a coloring material with accuracy and speed. Measuring In addition, a certain amount of coloring material should be used automatically by means of an easy-to-perform mefl process take place. . ■ ■

Other features and advantages of the invention are set out below on the basis of several execution examples shown in the drawing explained. ,

Ea seigt:

Fig. 1 is a graph showing the relationship between relative humidity and the Weight of paint material,

2 is a graph showing the relationship between the relative humidity and the volume

of the coloring material,

Figures 3A and 3B

graphical representations to illustrate the grain size distribution in various dyes,

S> 2 1/0340

Dipi.-Ing. Heinz Immt, patent attorney 0-8 MOndwn 81. CotimatUab81 Talafon: ((STT) 48 38 20

- 4 m

4 shows a graphic representation to illustrate the relative standard deviations of the measured quantities various dyes,

Figures 5 and 6

graphs to illustrate the relationships between the relative standard deviation of the measured amounts of various dyes and the shape the measuring vessel used,

Fig. 7 - a schematic representation of an embodiment of a Measuring vessel according to the invention,

Fig. 8 is a plan view of an embodiment of a measuring unit according to the invention,

9 is a side view of the measuring unit, partly in section according to FIG 'of the line A-A of Fig. 8,

Fig. 10 is a side view of the measuring unit, partly in section along the line B-B of Fig. 8,

11 shows a schematic representation of an embodiment of a Measuring device according to the invention, consisting of a plurality of measuring units arranged axially one above the other.

The following description refers in particular to dyes referred to. It should be noted, however, that the present invention is not limited to the dyes listed.

The method according to the invention is characterized by the volumetric measurement of one of the apparent specific gravity and the desired absolute dry weight of a colorant granulate of the pre-calculated volume of this colorant granulate by at least one measurement process using at least

009821 / 03A0

Oipf.-ln «. Heini UiMr. Patent attorney D - 8 MOrxfien 81, Gwintaitmfce 81 - Telephone: (0811) 48 38 20

an essentially cylindrical measuring vessel with a certain Capacity, the dimensions of which meet the following conditions (I) and (II):

and

o.ei -JjL- ii, 2 (id

where S is the cross-sectional area of the measuring vessel, L is the circumferential length of the measuring vessel and H is the height of the measuring vessel.

The device according to the invention has at least one measuring unit on, consisting of

1) a measuring plate with at least one essentially cylindrical Measuring opening on at least one preselected pitch circle, the measuring opening having a certain capacity and the following Has dimensions that meet conditions (I) and (II):

J3FT- - 4, 3 (Il

and "ν"

0.8 "? -J- = 1.2 (II)

where S is the cross-sectional area of the measuring opening, L is the circumference of the measuring opening and H is the height of the measuring opening, and the measuring plate can be rotated around the center of the pitch circle »

2) at least one feed tube, the lower end of which is at the top the measuring plate in a certain position on the pitch circle slidably rests, the feed tube with at least one Measuring opening in bulk connection ", and

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Dipt.-tng. Heins Lmmt, patent attorney D - 8 MOndi «n 81, Co»! Ma »» ro & · 81 Telephone: (0611) 48 38 20

3) at least one cover part for covering at least one lower exit opening of the measuring opening, wherein the cover part rests slidingly on the underside of the measuring plate in such a way that it completely covers the lower exit opening of the measuring opening, while the measuring opening with the feed tube in bulk connection stands, and that the cover part no longer exerts a covering effect, if then at least one of the measuring openings is separated from the feed pipe.

As already stated above, the coloring material is usually by weighing a certain. Amount measured. In this case, the content by weight of the effective coloring component in the coloring material is influenced by the atmospheric humidity.

In Fig. 1, the weight changes of three dyes are D-I, D-2 and D-3, with a relative humidity of 0 to 100% are saturated. The CJi weighted anything used in this experiment Dye is 49 g in the absolutely dry state at a temperature of 20 C. The dyes D-I and D-2 are in powder form and the dye D-3 is in granular form of a medium one Grain size with a mesh size of 40.

At 100% relative humidity, the weight of the dyes DI and D-2 is 20 to 25% higher than that at 0 % relative humidity, and 10% larger than. this at a relative humidity of 65%, ie under normal conditions.

From these results it can be seen that it is very difficult

a certain amount of effective coloring ingredient in the coloring material ensure, even if the coloring material has been weighed

Hwa UiMr. PotontomraH D - t M0ndw «i 81. Coumastrafc * 81 T.l.fon: (0811) 48 36 20

gear is measured precisely because the powdery dye is light Absorbs moisture from the atmosphere unless the absorbed moisture in the dye is properly regulated.

The apparent volume of dyes D-I and D-2 corresponding to the above Weight changes, but changes only slightly if the relative humidity fluctuates.

The three curves shown in Figure 2 illustrate the apparent volume changes for dyes D-I, D-2 and D-3 which each have a certain weight and are each saturated under different relative humidity conditions.

From Fig. 2 it can be seen that the apparent volume of the dyes DI and D-2 changes slightly with a change in the relative humidity of the atmosphere. The dye D-3 in granular form is only slightly beeinf by a change in relative humidity in its weight and its apparent volume! U ^f? '. In addition, it can be stated that the granules of the coloring material neither tend to fly away during the MeO process nor to adhere to the surface of the measuring vessel; the granules also do not form any undesirable voids which would otherwise arise when filling the Mefgefte due to agglomeration of the coloring material in the form of a bridge. could.

The relationship between the particle size distribution of the dye and the measurement accuracy is explained below.

In Fig. 3A, the grain size distribution of six kinds of coloring *

0 ^ 9821/0340

Dtpl.-tnf. Heinz Lmmt, patent attorney D - 8 MOndWt 81, Co * ima »tra & · 81 Telephone: (08Π) 48 38 20

■ d-4, D-5, D-6, D-7, D-8 and D-9 as well as that in Fig. 3B of a dye D-IO shown. Fig. 4 illustrates the relative standard deviations Of / x of the weight of the dyes D-4 to D-IO, each volumetric through a single measurement process measured under standard conditions (20 C, 65% relative humidity) will.

Regarding the results shown in Figs. 3A and 3B to note that the dyes D-4, D-5, D-6, D-7 and D-8 have a particle size distribution with a mesh size of 10 to 70, Dye D-9 is from 20 to 50 and Dye D-10 contains a grain size distribution with a mesh size of 50 to 100.

According to FIG. 4, the relative standard deviation is 0 < / x of the weight of the dye D-9 with volumetric measurement 0, 7 5o (/ χ, For the dyes D-4 to D-8 this value is 0, 12, 0, 26, 0.275, 0.29 and 0.335, the standard deviation (χ / χ is 0.75 for Dye D-9 and 1, 10 for Dye D-10.

From the results of FIGS. 3A, 3B and 4 it can be clearly seen that the relative standard deviation is always large when the coloring material has a relatively smaller or larger grain size. Suitable particle sizes of the coloring material are a mesh size of 10 to 70, preferably up to 50. for example,% is such a in the order of 20, the grain size "u 99 wt. in the case of the dye D-4 at a mesh size of 10 to 70 and its Q (/ χ value is of all investigated dyes at the smallest.

UQ9821 / 0340

DipL-big. Hwflx U * * *, Patent Attorney D - 8 Mönchen 81, Coiimaitrafe 81 - Telephone: (0611) 48 38 20

On the basis of examinations extending over a long period of time, it has been found that, in order to improve the measurement accuracy, it is advantageous if 95% by weight or more of the total weight of the dyeing material has a grain size of a mesh size of 10 to 70, preferably not more than al * 1 wt ^ - comprise% of the coloring material a smaller particle size than 70, this percentage exceeds at extremely fine, so a smaller grain size than 70-containing particles is 1%, then the coloring granules tends dan to adhere the inner faces of the measuring vessel, whereby the C \ / χ value becomes so large that. that the measurement accuracy is impaired.

A coloring material granules satisfying the above condition is suitable for the method and the device according to the invention to carry out the procedure. The coloring material granules can easily be made from a powdery coloring material by moistening, drying and sieving, optionally using a suitable binding agent. It is also useful before Use of the coloring material granules to subject them to a sieving process again in order to achieve a good particle size distribution reach.

In general, the apparent specific gravity of the coloring material granules in the above-described particle size distribution is 1 or less than 1, in some cases it can be greater than 1.

The term "verifiable specific gravity" refers to the ratio between the absolute dry weight of the coloring material granules filled into a measuring vessel of a certain volume

/ 0340

ftf. Heinz UtMf, patent attorney D - 8 MänaW 81. Cosimastrofc · 81 Telephone ·. (0611) 48 38 20

- 10 - and the weight of water poured into the same measuring vessel.

G denotes the apparent specific weight and V the volume of the coloring material granulate to be measured, where W is the absolute dry weight of the coloring material granulate having a volume V, then the following relation applies:

W = VG

Should now be the absolute dry weight W of the colorant granulate measured, then the required amount of granules can be measured can be obtained by volumetric measurement of the volume V, which

W can be calculated according to the formula V - ~ z -. The volume V

Previous year

is hereinafter referred to as "target volume". The measuring vessel for the method according to the invention must have the dimensions which satisfy equations (I) and (H).

In Fig. 7 an embodiment of the measuring vessel is shown. The measuring vessel has a cylindrical measuring space 8 a height H, a cross-sectional area S and a circumferential length L. on.

Fig. 5 illustrates the relationship between the quotient

of the various measuring vessels and the cX / x values of the absolute dry weight of the dyes D-4 measured volumetrically using the aforementioned measuring vessels. Fig. 6

TJ

illustrates the relationship between the quotient, e> f of the various measuring vessels and the ei / x value of the absolute dry weight of the dye D-4 according to FIG. 5. In both cases

009821/0340

OipL-lnf. Haini imm. PotontomraH 0-8 Momhwi 81. Cotimostra ^ · 81 T «l« fon: (0811) 48 38 20

- 11 -

each measuring vessel has a predetermined capacity.

The ratio values of S with respect to L and of S with respect to H, respectively are suitable for identifying the shape of the measuring room.

If the measuring space has a round cross-section, then corresponds to

LV "™ ¹

Index .p = - = 2 "If, so there can never be a value less than ale '2

appear.

Table 1 below shows the values for the index τκ? Τ given for various cross-sectional profiles of measuring vessels with a certain cross-sectional area.

Table 1

No. profile Ratio of L. Λ Side lengths Λ U 1
t circular profile 4, ö C. square rTOlil '. ' A. triangular jrroi. 4.02 4th secular proi. 4.1 5 rectangular profile 9:11 4.26 6th rectangular profile 8: 12.5 4.54 7th rectangular profile 7: 14.3 5.0 8th rectangular profile 6: 16.7 9 rectangular profile 5:20

Dipt.-Ing. Heinz Imittt. Patent attorney D - 8 Münden 81. Coiimastrafc · 81 Telephone. (0611) 48 38 20

- 12 -

Different measuring rooms of preselected dimensions, i.e. one Capacity · of 1000 cm, a cross-sectional area of 100 cm and a height of 10 cm and various profiles as shown in Table 1 were prepared, and the dye D-4 became measured by means of these different measuring vessels under standard conditions (20 C, 65% relative humidity). The relative deviations from the norm Q ^ / 'X were based on the results of 50 times Measurements determined. The measurement results are shown in FIG.

There were different measuring rooms with a capacity of 1000 cm, different profiles according to Table 1 and different Heights prepared, whereupon the measurement of the dye D-4 under the same MeO conditions in the prepared measuring vessels 'was made. The relative deviations from the norm f ^ / χ were determined from the results.

The drawing is recorded in FIG. 6.

Tl

^{i is} this measurement

From the results apparent from the drawings, it follows that there is an optimal shape of the measuring space for measuring the There are coloring material with high accuracy.

Au · the above discussion it follows that, to reduce a measurement error, the circumference length of the measuring chamber cross-section should be hnittsfläche as small as possible in relation to the size of the Querfic and that the height be selected within a certain size relative to the size of the Querschnittsfläc ha should. In other words, this means that the measuring space suitable for the invention is essentially a cylindrical one

do 9 821 / cmo

DipL-feg. Heim UiMf, Patontonwalt D - 8 MOndiM 81, CoiimartroB 81 Ttlefan: (0811) 48 38 20

- 13 -

Have a shape and satisfy "the following equations (I) and (II) got to:

and

As already stated above, the measuring space suitable for the invention should have an essentially cylindrical shape and thus with a substantially vertical peripheral surface be provided. On the basis of investigations into the shape of the measuring space, it was found that a measuring space was also flattened conical or flattened pyramidal design is only suitable for the invention if this design is essentially is cylindrical so that there is not much difference between the upper and lower opening areas.

In general, the measuring vessels are for volumetric measurement of liquid is provided with a scale to indicate the liquid level, and the measurement is carried out by reading the liquid level from the scale. Solids, such as granules, however, cannot form a horizontal plane like a liquid within the measuring vessel. Therefore, measuring the granules must be like this take place that first the measuring vessel is filled and then the excess is removed until the fill quantity with the required Volume matches.

If 1000 g of one should now have an apparent specific weight of

0.8 having granules as absolute dry weight by volume be measured, then first the required weight

O09821 / 03A0

Dipl.-lng. Hwnz Umr. Patent attorney D - 8 MOnch.n 81. Cosimaitrofc 81 Telephone: (0811) 48 38 20

- 14 -

corresponding target volume V is calculated as follows:

V = 1000: 0.8 = 1250 cm ³

3 The desired volume of 1250 cm can be determined by the following measurements be determined:

Single measurement using a 1000 cm measuring vessel Capacity,

two measurements using a 100 cm measuring vessel

Capacity ^ and

five measurements using a measuring vessel of 10 cm

Capacity;

or by measuring 125 times using a measuring vessel of 10 cm Capacity.

If the granulate has an apparent specific gravity of 0.9, then the desired volume is calculated as follows:

V = 1000: 0.9 ~ Uli cm ³

The required amount can therefore be measured with a

3 3

1000 cm measuring vessel, a measurement with a 100 cm measuring vessel, a measurement with a 10 cm measuring vessel and a measurement with

3 3

a 1 cm measuring vessel or 1111 measurements with a 1 cm

Measuring vessel can be determined.

Features and structure of the device according to the invention are explained below with reference to the drawing,

In FIGS. 9 and 10 _t B is a measuring plate 1 as a rotatable disc having a plurality of measuring holes 2 (in Fig. 8 "ind twelve measurement

009821 / 0-3 AO

Dipl.-Ing. Hein * Uuer, patent attorney D 8 Mündien 81, Ccnimosttaije 81 Telephone: (0611) 48 38 20

- 15 -

Openings shown) formed, the centers of which lie on a pitch circle 3. I A rotary shaft 4 st circuit 3 is set in the center of the part to the measuring plate 1 to rotate around the center of the partial circle 3 and supporting them. Below the measuring plate 1, a cover part 5 is arranged such that its surface rests on the underside of the measuring plate 1 slidably. Above the measuring plate 1, a feed tube 6 is provided, the lower end of which also rests in a sliding manner on the upper side of the measuring plate 1 at a point on the pitch circle 3. As can be seen from FIG. 10, an outlet opening 10 is formed in the cover part 5 so that it is in bulk connection with one of the measuring openings. A discharge pipe 11 is arranged below the cover part 5 in such a way that its upper end is aligned with the outlet opening 10. When the measuring plate is rotated in the direction of the arrow according to FIG. 10, the lower opening of the measuring opening 2 is first partially covered by the covering part 5, then completely covered and finally released again, while the underside of the same rests on the upper side of the cover part 5. :

In FIG. 9, the feed tube 6 is arranged above the measuring plate 1, so that its lower end is connected to one of the measuring openings 2 , while its lower outlet opening is completely closed by the cover part 5. The granulate 7 is fed into the measuring space 8 via the feed pipe 6,

A sealing element 9 is placed firmly at the lower end of the supply pipe 7 and rests on the top of the measuring plate 1 in a sliding manner. With a corresponding further rotation of the measuring plate 1, a measuring space B, the lower end of which is closed by the cover part 5, is brought into bulk connection with the supply pipe 7, and the granulate 7 can

009821/0340

Dipl.-lnq. Heini Lm «r, patent attorney D - 8 Munich 81, Ccnimartrafe 81 Telephone: (0611) 48 38 20

- 16 -

thus be filled into the measuring space 8. Prevented at this point the sealing element 9 that between the lower end the feed tube 6 and the top of the measuring plate 1 creates a gap through which granules 7 can penetrate while at the same time the lower end of the sealing element 9 strips off the excess granulate from the completely filled measuring space 8.

This stripping off of the excess granulate 7 takes place by moving the with the lower end of the sealing element 9 related measuring plate 1, whereby only the desired apparent volume of the granulate remains in the measuring space 8. at Further rotation of the measuring plate 1 establishes the connection between the measuring space 8 and feed pipe 6 interrupted, and the lower end of the measuring space 8 filled with the granulate 7 is brought into bulk connection with the outlet opening 10 according to FIG. 10, so that the granulate 7 located in the measuring space 8 via this outlet opening IO and the discharge pipe 11 is emptied into a container.

In order to prevent that a gap arises between the top of the cover 5 and the bottom of the measuring plate 1 through the Granules 7 can escape, it is expedient to push the cover part 5 by pressure means, such as an elastic material or a spring, to press against the measuring plate 1. Furthermore, it is useful, the top of the cover 5 made of a material with little Frictional resistance, such as polytetrafluoroethylene, to produce an unimpeded sliding of the measuring plate 1 along of the cover part 5 to ensure.

Likewise, the sealing element 9 should be made of a material

009821/0340

Dipl-In * Heinz Lmmt. Patent attorney D - 8 Munich 81. Cosimaitrajj 81 Telephone: (0811) 48 38

- 17 -

with low frictional resistance, such as polytetrafluoroethylene, exist in order to allow the measuring plate 1 to slide unhindered along the lower end of the feed tube 6 here as well to ensure. The sealing element 9 can expediently also under pressure by means of pressure means, such as by means of a A spring or an elastic material, for example rubber, rest on the measuring plate 1.

If the contact surface of the sealing element 9 is relatively smaller, then the measuring plate 1 can be moved unhindered along this contact surface.

The measuring plate 1 can be rotated by hand or by means of a drive means, for example by means of an electric motor. The drive means can either with the fixed on the measuring plate 1 in the center of the rotating shaft 4 or directly with the Measuring plate 1 are in connection.

In order to be able to automatically count the number of successive measurements, it is advisable to use a photoelectric Means or a microswitch the number of cycles of the Counting measuring aperture through a certain point. For this purpose it is also advantageous to position the measuring plate 1 in a specific position To rotate the angle in order to determine the required number of measurements via an electric rotary magnet or the like.

The dimensions of the measuring space 8 should meet the following equations (I) and (II):

Dipl.-lraj. Heinz Lester, patent attorney

D - 8 MOmfi.n 81. CosimastraS 81 Telephone: (0611) 48 38 20

- 18 -

and

(Π)

The aforementioned measuring units can, as FIG. 11 shows, also be arranged one above the other. Each measuring plate 1 can be held horizontally, as shown in FIGS. 9 and 10, or in an inclined position, provided that the feeding and discharging processes can be carried out without difficulty.

Furthermore, the measuring openings can be arranged on two or more concentric partial circles around the center of the measuring plate 1 . In this case, the measuring rooms can be equipped with different capacities on different part circles.

It is also expedient to arrange the discharge pipe 11 in such a way that its upper opening rests against the lower opening of the measuring plate 1 , whereby the granulate can be discharged directly from the measuring space 8 into a container, since the measuring space is not closed by the cover part 5.

The lower opening area of the feed pipe can be selected so that it is connected to only one measuring space , but it can also cover two or more measuring spaces. In addition, the contact surface of the feed pipe 6 can be annular and provided with a tongue-shaped cover part in order to cover the upper opening of the measuring space and thus prevent the granulate from overflowing.

The measuring plate 1 can either only have a feed tube 6 and a cover

009821/0340

Dipl-lnq. H * iiu Lmnt, patent attorney D - 8 Mundien 81, Cotimastrafje 81 Telephone: (0611) 48 38 20

- 19 -

Part 5 can be assigned, but ee can also be two or more these pairs may be provided.

Furthermore, it is possible to rotate the measuring plate 1 in only one direction or alternately in two directions to turn.

From the preceding description and the drawings it can be clearly seen that the method and the device according to the invention to carry out the method make it possible to use a coloring material granulate measure volumetrically with accuracy and speed, with successive measurements being automatic be performed.

To better illustrate the invention are given below Exemplary embodiments explained.

Embodiment 1

Granules of Dye D-4 with a moisture content of about 11% were measured as follows to be an absolute Obtain dry weight of 1000 g. The grain size distribution of the granules D-4 can be seen from FIG. 3A, the apparent one specific gravity was 0.672.

(1) The measuring device used comprised a measuring unit according to 8, 9 and 10. Each measuring port of this measuring unit had a cylindrical space with a capacity of 10 cm and met the following dimensional conditions: '

009821/0340

Dipl.-litg. Heini Leiter, patent attorney 0-8 Manchen 81, Cosimastrafc 81 - Telephone: (0611) 48 38 20

- 20 = 3.55 and Mr- = 1.14

(2) The target volume to be measured volumetrically was calculated as follows:

1000: 0.672 = 1490 (cm ³ )

(3) To measure this target volume of 1490 cm

of the granulate D-4 were 149 measurements by means of the aforementioned measuring unit at a temperature of 25 C and one relative humidity of 65% carried out.

The absolute dry weight of the measured granulate D-4 was 994 g.

A different unit of measurement was used for comparison purposes. The measuring opening / the comparing measuring unit had a capacity of 10 cm and met the following dimensional requirements:

j-r = 3.55 and r ~ - = 1.36

The granulate D-4 was measured to the target volume of 1490 cm by means of the comparison measuring unit. The absolute dry The weight of the measured granules D-4 was 98.5 g.

Aue of the above can be seen that the accuracy of the invention Measurement is greater than that of the comparison measurement.

009821/034

Dipl.-Ing. Heinz UtMr. Patent attorney 0-8 Munich 81, Cosimaitrafce 81 ■ Telephone: (0611) 483820

- 21 embodiment 2

Dye D-8 granules having a moisture content of about 11% were measured volumetrically as follows to be an absolute Obtain dry weight of 1000 g. The granules D-8 had a particle size distribution as shown in FIG. 3A and an apparent one specific gravity of 0.890.

(1) The measuring device used comprised two measuring units as shown in FIGS. 8, 9 and 10. The first measuring unit had twelve measuring units. openings with a capacity of 10 cm each, the second measuring unit had twenty-four measuring openings of a capacity

3
Capacity of 1 cm each. Each measuring port of the first and the second measuring unit was cylindrical and met the following dimensional conditions:

T TT

JgT = 3.55 and η-χ = 1.02

(2) The target volume to be measured volumetrically became calculated as follows:

IQOO: 0.890 = 1124 (cm ³ )

(3) To measure the target volume of 1124 cm of the Granulate D-8 were 110 times measurements by means of the first Measuring unit and measurements made 24 times by means of the second measuring unit, each at a temperature of 25 C and one relative humidity of 65%.

The absolute dry weight of the measured granules D-8 was g.

DtpJ.-livj. Heinz Immi, patent attorney D - 8 Manchen 81, Cosimastro & e 81 - Telephone: (0811) 48 38 20

- 22 note:

The specified "mesh" numbers (screen width values) are incorrect with the DIN sieve series. But these are specified Converted values, then the values on the graphs are no longer correct.

009821/0340

Claims (1)

Dipl-ing. Hdni Uw. PotMtamnk 0-8 MOndwn 81. Cojimastiafe · 81 ■ T.Wfon. · (0611) 48 38 20 - 23 - PATENT CLAIMS 1. A method for measuring a coloring material, characterized by volumetrically measuring from the apparent specific gravity of a coloring matter granules and the desired volume calculated in advance to the desired dry weight of the granulate by at least one measuring process using at least one substantially cylindrical measuring vessel with a certain capacity, the dimensions of which meet the following conditions: ä- ^ 1,2 (II) I ^s and Ο, βί rä
I ^s where S is the cross-sectional area of the measuring vessel, L is the circumferential length of the measuring vessel and H is the height of the measuring vessel. 2. The method according to claim 1, characterized in that that the coloring material is a dye. 1 " 3. The method according to claim 1, characterized in that that the coloring material is a pigment. 4. The method according to claim 1, characterized in that at least 95 wt.% Of the granules have a grain size in The mesh size range from 10 to 70. 5. The method according to claim 1, characterized in that at least 95% by weight of the granules have a grain size 009 8 21/0340 ΟφΙ.-Ι · 9 · Heinz Lmmt, patent attorney 0-8 M0ndi «n 81. Cosimaitraft · 81 T.lefon; (0811) 48 38 - 24 _ The mesh size range from 20 to 50. 6. The method of claim 1, dadur-ch in that not more than 1 wt.% Of the granulate having a grain size smaller than a mesh of 70. 7. The method according to claim 1, characterized in that that the measuring vessel satisfies the following equations. - Ji- - 3 55 pn - ³ " and H = 1.14 *8th. Device for volumetrically measuring a coloring material with at least one measuring unit, marked duijch a) a measuring opening (1) with at least one essentially cylindrical measuring opening (2) which is at least a pitch circle (3) is arranged and a certain capacity as well as the equations (I) and (II) has satisfactory dimensions: f§T "4.5 (I) and ° ' ^{8ir T} where S is the cross-sectional area of the measuring opening, L the The circumference of the measuring opening and H denote the height of the measuring opening and the measuring plate around the center of the pitch circle (3) is rotatable, 009821 / 03A0 DipL-lng. Heinz Ιμμγ. Patent attorney D - 8 Munich 81. Cosimastrafc 81 Telephone: (0811) 4838 - 25 - b) at least one feed pipe (6), the lower end of which on the top of the measuring plate (1) on a certain point on the pitch circle (3) sliding, whereby the feed pipe (6) with at least one measuring opening (2). can be brought into bulk connection, and c) at least one cover part (5) for covering at least one lower outlet opening of the measuring opening (2), wherein the cover part (5) rests slidingly against the underside of the measuring plate (1) in such a way that it opens the lower outlet opening the measuring opening (2) completely covers while it is in bulk connection with the feed pipe (6), and that it no longer exerts a covering effect when at least one of the measuring openings (2) is separated from the feed tube (6) is. 9. Apparatus according to claim 8, characterized in that at least one discharge pipe (11) of the underside of the measuring plate (1) is assigned, the upper opening of which is opposite the measuring opening (2) when the cover part (5) has no covering effect >
exercises more. 10. The device according to claim 8, characterized in that the cover part (5) is provided with an Au stritte opening (10) is, via which a pouring connection is established with the measuring opening (2) when the cover part (5) has no covering effect exercises more. 11. The device according to claim 10, characterized in that the discharge pipe (11) with its upper opening of the outer 009821 / 03A0 DipJ.-lnq. Heiiu L * M «r. Patentonwalt D - 8 Munich 81. Cosima »tro & 81 Telephone: (0Θ11) 48 38 20 - 26 - opening (10) opposite. 12. The device according to claim 8, characterized in that the feed pipe (6) is provided with an annular sealing element (9) at its lower end, which is in sliding contact with the top of the measuring plate (1). 13. The device according to claim 12, characterized in that that the sealing element (9) consists of polytetrafluoroethylene. 14. Apparatus according to claim 8, characterized in that means for driving the measuring plate (1) are provided. 15. Apparatus according to claim 8, characterized in that that means are provided for counting the number of measurements. 16. The device according to claim 8, characterized in that the measuring openings (2) on at least two concentric Part circles (3) are arranged around the center point of the measuring plate Π). 17. The device according to claim 16, characterized in that that the measuring openings (2) arranged on different pitch circles (3) have different capacities. 18. The device according to claim 8, characterized in that that a plurality of measuring units is arranged coaxially one above the other. 009821 / 03A0 H * iK Lmmt, »alMlonwoK D - 8 Mfcidtwi 81. Cotimortrafc · 81 - T * l * fon: (0811) 48 38 - 27 - 19. The device according to claim 8, characterized in that the dimensions of the measuring opening (2) meet the following conditions: H = 3.55 and - ^ p = 1.14 009821/0340