RU2669171C1 - Infusion bag - Google Patents

Abstract

FIELD: package and storage; food industry.SUBSTANCE: invention relates to packaging materials for food products subject to heating in this package, namely to infusion bags containing a substance whose infusion in the liquid is to be obtained, preferably to paper bags with tea or coffee. Technical result is achieved by the fact that the infusion bag is made of a rectangle of porous material and is provided with a spinning thread forming a loop, the tab of which is located outside the bag, and the inside of the sachet from opposite short sides of the branch of the squeegee thread meet each other along its longitudinal axis of symmetry and at the exit of the sachet each of the free ends of the squeezing yarn forms a knot, through which the other branch of the spinning filament exits out, the end of which forms a knot on the opposite side of the sachet. Infusion bag is made from a single rectangular sheet of porous material with a length-width ratio selected from a range of 3.5÷4.3:1, in the manufacture of a sachet of two rectangular sheets of porous material, the ratio of length and width in them is selected from the range of 7÷8.6:1. Ratio of the length of the squeezing yarn and the length of the sachet is selected from the range of 4÷5.5:1. Free ends of the squeezing yarn are removed from the sachet through the notch cut on each side of the sachet from the side of its end. Assembly that surrounds each of the end sides of the sachet is in the form of a ring-shaped loop with a free end of the squeezing thread wound on it, which forms an annular loop, turns, while the number of turns and the pitch between them are selected proceeding from the need to ensure a reliable fixation of the assembly, and also the degree of rigidity of the annular loop with the windings wound on it, which is required to allow the other end of the squeezing thread to pass through the center of the annular loop. Open longitudinal sections of one or two of the porous sheets intended for making the bag for infusion are connected by a welded seam. For the case of making a sachet from one porous sheet of non-weldable material, its open longitudinal sections can be joined by rolling. Label is attached to the hinge formed from the outside of the sachet by a squeegee thread. Squeezing yarn can be made of two pieces, the ends of which are not involved in the formation of the knots on the end sides of the sachet, are connected at the place covered by the label.EFFECT: technical result is increased efficiency of pressing the liquid out of the bag for infusion and reduced likelihood of its rupture and destruction.10 cl, 4 dwg

Description

The invention relates to packaging materials for food products that undergo heating in this package, namely to infusion bags containing a substance whose infusion in a liquid is required to be obtained, mainly to paper bags with tea or coffee.

State of the art

Paper bags with tea are sealed bags of porous material containing tea leaves, which are placed in the dishes intended to receive the drink (cup, mug, teapot, etc.). Before using the resulting drink, as a rule, the bags are removed from the vessel with the drink. At the same time, the liquid contained in the bag in the bag, flowing out of it, colors the surface beneath it. Tea, coffee, various coffee substitutes, flower collections for infusions, as a rule, are persistent dyes.

Therefore, at the same time as the bag with the infused product is removed from the vessel, the bag is squeezed with a spoon or a device specially designed for this, in order to remove excess liquid from it and make it relatively dry. The use of such devices for spinning is not always possible, but even with them, it is difficult to achieve a result in which almost all the liquid remains in the brewing vessel.

In most known solutions, devices are used to apply external pressure to the infusion bag to squeeze out the liquid. For this, for example, in the invention “Advanced infusion bag” (international publication number WO 1991/013580, IPC A47G 19/16, publ. 09/19/1991) a thread is provided that is fixed on one side of the infusion package and passes through the package so that after use it can be squeezed by pulling this thread, this creates a pressure on the side of the bag where the thread comes out, and the opposite sides of the bag are compressed. A label made of cardboard can be fixed on the thread, through which pressure is applied to the bag.

Packages of this type have several disadvantages. Firstly, if there is no cardboard label, then any other means, including the user's fingers, should be used to squeeze the bag, which is undesirable from the point of view of compliance with the sanitary regime. In addition, the force exerted on the squeezing thread extends at a point and, accordingly, the compression of the bag occurs only between opposite points at the edges of the bag, which on the one hand does not allow effective spin and removal of all the liquid remaining in the bag, and on the other hand - there is a high probability of a burst of the bag at the point of application of force.

In another known solution, “Infusion bag” (patent RU 2141438, IPC B65D 81/34, A23F 3/00, publ. 11/20/1999), the bag is made of two sheets of porous material, tightly interconnected around the periphery of the bag, to form cavity for infusion substance, and is equipped with a squeeze thread entering the cavity for infusion substance and exiting from it through a strip passing along the periphery of the package formed at the junction of two sheets of porous material, and which is laid by a loop inside this cavity around the specified section of the sealed connecting the sheets to each other so that the pulling of the end parts of the squeeze yarn in opposite directions leads to at least partial crushing of the bag and thereby squeezing the liquid out of it.

The invention according to patent No. 2141438 is the closest analogue of the claimed invention.

The closest analogue has the following disadvantages: a high probability of bursting of the bag during the spin cycle remains due to the application of breaking strength to the bag and the presence of a cutting load, which is illustrated by a vector diagram of the forces acting on one of the variants of the tea bag, in which the areas of the hermetic connection of its sheets the porous material is located in opposite corners of the cell (Fig. 3 in the graphic materials attached to the description of the patent No. 2141438). A vector force diagram is given in the Graphic Materials section of FIG. 1 of the present description.

SUMMARY OF THE INVENTION

The technical result, the achievement of which the creation of the claimed invention is directed, is to increase the efficiency of squeezing the liquid from the bag for insisting and reducing the likelihood of it breaking and breaking.

The technical result is achieved by making the squeeze thread in the form of a loop with an eye on the outside of the infusion bag, while the bag has the form of a hollow tube with one notch on the side of each of the ends. and each of the free ends of the squeeze thread is brought out of the notch in the bag, tightening it with a ring-shaped loop. The loop is formed by the free end of the squeeze thread, emerging from the cavity of the bag through the notch, and wrapping the bag around it (at the stage of formation it is a hollow flattened tube) at a distance from the edge corresponding to the depth of the notch. Then the loop is wrapped in several turns of the same free end of the thread, which formed the loop.

When applied to the free end of the thread, the pulling forces of the turns wound around the loop are compacted, and the loop with the thread wound on it acquires a rigid ring-shaped shape, pulling across the hollow tube.

In this case, the bag can be formed from one sheet of porous material of a rectangular shape with a ratio of length to width, selected from the range of 2 ÷ 3: 1, or from two sheets, in this case, the ratio for each of them is selected from the range of 4 ÷ 6: 1.

The length of the squeezing thread in relation to the length of the bag is selected from the range of 5-6: 1.

A brief description of the graphic materials.

FIG. 1 Vector diagram of the forces acting on the package for insisting upon application of force to the squeezing yarn with a structure according to one of the variants of the closest analogue, where the following notation is used:

1, 2 - Vectors of applied force

3, 4 - Vectors of force directed to the compression of a sachet

5, 6 - Points at which the load from the squeeze yarn is transferred to the porous material and a shear load occurs

FIG. 2. A bag for insisting, where the following designations are accepted:

7 - infusion bag body

8 - squeezing thread

9 - the first ring-shaped loop

10, 11 - the first and second cuts

12, 13 - the first and second ends of the squeezing thread, forming nodes at opposite end ends of the bag

14 - second annular loop

15 - eye of the loop formed by squeezing thread

16 - shortcut

FIG. 3. The end view of the infusion bag on an enlarged scale, where the following notation is accepted:

17 - ring formed by the free end of the squeeze thread emerging from the notch.

18 - another branch of the squeezing thread, forming an annular loop around the bag from the side of its opposite end end.

FIG. 4. Vector diagram of the forces acting on the claimed bag for insisting upon application of force to the squeezing thread, where the following notation is accepted:

19, 20 - Applied Force Vectors

21, 22 - Vectors of force directed to compressing a sachet

23, 24 - nodes based on ring-shaped loops formed by the opposite free ends of the squeeze thread, through which the force is transmitted to the walls of the volumetric body, compressing them.

The implementation of the invention.

In the closest analogue, an embodiment of manufacturing an infusion bag with an squeeze thread is presented, made of sheets of porous material with the formation of a cell between them, shown in FIG. 1. The squeezing thread, when applied to it in directions 1 and 2, creates compressive forces of the sachet - vectors 3 and 4. At the same time, in sections 5 and 6 of the hermetic connection of sheets of porous material located in opposite corners of the cell, a load with the squeeze yarn is transferred to the porous material of the bag, creating a shear load.

The claimed infusion bag is devoid of this drawback, as will be shown with reference to the vector force diagram shown in FIG. four.

The body of the bag 7 is made of sheets of porous material, it can be one sheet or two sheets. In the manufacture of a bag from a blank consisting of one sheet, material is saved and the probability of bursting of bag 7 due to poor welding seams is reduced.

In addition, depending on the type of porous material, in particular, if the porous material is non-heat-sealing, then other methods and means of fastening are used instead of the weld, in particular rolling can be used. Rolling is not used if the number of blanks is two or more.

To connect parts of the blanks for the body of the bag made of polymer woven or non-woven materials, as well as for parts of the blanks from heat-sealable materials, welds are used. For simplicity, a further description is made for the case where the preform consists of one sheet of porous material

The ratio of the length of a workpiece from one sheet of porous material to its width is selected from the range of values 3.5 ÷ 4.3: 1 (for a workpiece from two sheets, the ratio of length to width for each of them is selected from the range 7 ÷ 8.6: 1) .

With such ratios of length and width, when filling the bag with the infused product after swelling of the latter, a cylindrical volume body is formed in which the efficiency of squeezing the liquid from the used bag increases, as will be shown below, by several times compared with bags, for example, spherical (or close to it) ) forms. On the other hand, if this ratio exceeds the selected range (i.e., for the case when the long side of the bag exceeds its short end side by more than 4.3 times), there will be a problem of squeezing the bag without dropping liquid on the surface on which there is a container with infusion. As a rule, one bag of infused product is designed to place a standard portion of such a product in it, which is designed for a standard capacity (cup, mug, glass, etc.). The standard volume of the tank determines its size. Accordingly, exceeding the length of the preform for the manufacture of the bag body more than 4.3 times its width will lead to the fact that when the bag is squeezed, the remaining liquid will not fall into the container with the infusion, but onto the surface on which this container is standing.

The squeeze thread 8 is made mainly of synthetic fibers, which ensures ease of sliding when a squeezing force is applied to it, and at the same time the required strength is ensured.

At the same time, it is possible that the squeeze yarn 8 can be made of cotton or artificial fiber, if this is required by the particularities of the packaging equipment.

The ratio of the length of the squeeze yarn to the length of the long side of the rectangular porous sheet from which the bag body 7 is made is selected from a range of 4 ÷ 5.5: 1. When the length of the squeezing yarn 8 is less than 4 lengths of the workpiece, ring-shaped loops 9 and 14 with free ends wound thereon 12 and 13, respectively, at the end edges of the bag body 7, nodes 23, 24 of which provide a sufficiently reliable fastening, cannot be made from it the ends of the bag for insisting and the possibility of applying force to the squeezing thread 8 with the necessary degree of freedom. If the ratio of the indicated lengths exceeds 5.5, the design of the bag with squeeze thread becomes non-ergonomic.

The squeezing thread 8 is laid along the field of the workpiece from its inner side, forming a loop 15 outside the workpiece.

After bonding open longitudinal sections of the porous sheet with a weld or rolling, a flat blank of a given length and width is formed.

In the case of the bag 7 on its opposite short sides, cuts 10, 11 are made to bring the free end through each of them outward, respectively 12 or 13 of the squeezing thread 8.

The depth of cuts 10, 11 is selected based on the reliability of tying using squeezing yarn 8 nodes around the workpiece. Two nodes, tied at two opposite ends of the workpiece, allow you to form a cavity for placement inside it of the infused product.

The product to be infused is poured into the cavity in the bag 7 after one of the knots is tied using ring-shaped loops 9 or 14 formed by the free ends of 12 or 13 of the squeezing thread 8, brought out from the corresponding notch 10 or 11, respectively.

Depending on the equipment used, filling the cavity of the bag 7 with the infused product can occur simultaneously with the squeezing yarn 8 being inserted inside, so that knotting around the bag 7 with the free ends of the squeezing yarn 8 will take place after the infused product is placed inside the blank of the bag 7, which is not closed from the end sides cavity.

Knotting - more clearly (due to scale), one of the stages of this process is shown in FIG. 3 - occurs after the ring loop 17 is created and created by the same free end of the squeeze thread 8, which was created the ring loop 17, the turns are wound on it.

Then, a pulling force will be applied to the free end of the squeeze yarn 12 or 13 (Fig. 2), leading to a decrease in the diameter of the ring loops 9, 14 and the pitch between the turns wound on them, and ultimately to the formation of nodes 23, 24 (Fig. 4) ), in the form of rigid ring-shaped loops, pulling a hollow tube across from two opposite sides, due to which a cavity is formed with the product placed in it, which remains to be insisted.

In the case when the product to be infused is poured into the cavity in the bag 7 after knotting at one end of the bag, the described process of forming a rigid ring-shaped figure at the ends of the bag is carried out sequentially first with one of the free ends 12 or 13 of the squeeze thread 8, and then with the other .

объема емкости, в которую он засыпается. Это ограничение обусловлено прочностными характеристиками материала, из которого выполняется корпус пакетика 7.In dry form, the volume of infused product placed inside the bag 7 should not exceed

the volume of the container into which it is filled. This limitation is due to the strength characteristics of the material from which the bag body 7 is made.

After the knots from both sides are tied, the formation of the bag 7 with the product placed in its cavity is completed.

As it swells under the action of hot water of the infused product, the infusion bag 7 acquires a cylindrical volumetric shape, along the axis of symmetry of which are two opposite branches of the squeezing thread 8 (see Fig. 4). Considering the thickness of the squeezing yarn 8 from synthetic, cotton or artificial fiber, the distance of each of its branches from the axis of symmetry can be neglected and each of the branches of the squeezing yarn coincides with the longitudinal axis of symmetry of the bulk body containing the swollen infused product. On the presented graphic materials, the opposite ends of the squeezing yarn are shown spaced apart from each other by a noticeable distance in order to make the fulfillment of the infusion bag more obvious (Fig. 3) and the physical and mechanical processes that occur when the bag is wrung out at the end of the infusion (Fig. 4).

The force of the squeeze yarn 8 is transmitted to the porous material of which the bag 7 is made, around the entire circumference of the node in the form of a rigid ring-shaped figure covering the bag. In this case, unlike the closest analogue, the load is applied not to the point (see Fig. 1), but along a ring line formed by the free end 10 or 14 of the squeeze thread 8. The force to the squeeze thread can be applied using the label 16.

In addition, the squeezing thread 8 may consist of two segments of equal length. In this way, the execution of the squeeze thread simplifies the technology of forming the bag 7. In this case, the ends of the squeeze thread, not involved in the formation of nodes at the ends of the bag, are fastened to the loop portion of the loop formed by the squeeze thread outside the bag, under the yarlvk 16, which contributes to a more durable fastening of the segments of the squeeze thread 8, since most often labels are made of one folded in half or two sheets of paper, thin cardboard and other similar materials, on the outside of which the trademark is usually applied producer, and on the inner side of the glue is applied.

As a result, in stock - distributed load, which may be greater than in known solutions, but without the risk of bursting.

The thread, which is pulled in the inventive device, passes through the center of a rigid ring-shaped figure formed by the other end of the squeeze thread 8, and compresses the bag.

And since the thread that is being pulled, while squeezing the sachet, is centered by a ring-shaped rigid figure through which it passes, the lateral loads are compensated. As a result, it turns out that an axial force with self-centering is applied to a volumetric cylindrical figure (just like that, taking into account the shape of the workpiece described above, which describes a bag in which the infused product is swollen from hot water). The deviation of the squeeze yarn 8 inside the package 7 from the axis of its symmetry, as mentioned above, can be neglected.

Compressed by nodes in the form of rigid ring-shaped figures, the ends of the bag, when thrust is applied to the squeeze yarn, perform a function similar to that of the pistons in the cylinder, compressing the walls of the volumetric body of the cylindrical shape and the product inside it swollen during infusion, and the lateral loads acting on the entire lateral surface of the volumetric body while compensating for each other.

The active force remains the component acting along both branches of the squeezing thread 8, passing along the axis of symmetry of the volumetric body, the action of which is transmitted through rigid ring-shaped figures, wrapping around the end ends of the bag 7, to the walls of the bag, compressing them. In this case, the resulting overpressure causes the fluid to flow towards lower pressure, i.e. from bag 7 outside. Moreover, due to the elongated shape of the infusion bag and the application of force along its axis of symmetry in the fractional direction, the spin efficiency is significantly increased.

The aforesaid is confirmed by the following calculations.

We form a hard bag a bag of two square sheets of porous paper with side “a”. The surface area S _{p of} the bag is 2 a ² .

When a bag, for example, with tea, gets into the liquid, the tea swells and the bag turns into a ball (with certain assumptions). The surface area of the ball S _W = 4πR _W ² .

We equate the area of these two surfaces S _p = S _W → 2A ² = 4πR _W ² → Rш = 0,4а

The cross-sectional area of the ball S _{pop w} = 0.5a ² , the volume of the ball V _w = 4 / 3πR _w ³ = 0.267a ³ . Now we will form a cylinder with an axis parallel to the side of rectangle 2a from two square sheets with side a.

Cylinder height h _n = 2a, the cylinder diameter D c = a / π, the radius r _i = a / 2π.

The cross-sectional area of the cylinder S _{pop c =} a ² / 4π = 0,074a ² .

The volume of the cylinder V _{c =} a ³ / 2π = 0.16a ³

From here we get V _{w /} V _c = 1.67 and S _{pop w} / S _{pop c} = 6.757.

The above calculations show that for two bags of different shapes, while formed from blanks of the same area and from the same material, the internal pressure with the same squeezing force will differ by more than six times. Those. the smaller the cross section along the axis along which the spin force is applied, the higher the internal pressure and the more intense the spin.

Accordingly, the infusion bag made in accordance with the claimed invention, effectively removes the liquid remaining in it after use, and can be made on the basis of existing technical means and with their help. In this case, the risk of damage to the packages when removing liquid from them after use is significantly reduced.

Claims (10)

1. An infusion bag made of a rectangle of porous material and equipped with an squeeze thread forming a loop, the eye of which is outside the bag, and the branches of the squeeze thread that enter the bag from the opposite short sides run towards each other along its longitudinal axis of symmetry and exit each of the free ends of the squeeze yarn forms a knot through which another branch of the squeeze yarn comes out, the end of which forms a knot on the opposite side of the sachet. 2. The infusion bag according to claim 1, wherein the infusion bag is made of one rectangular sheet of porous material with a ratio of length and width, selected from the range of values 3.5 ÷ 4.3: 1. 3. The infusion bag according to claim 1, wherein the infusion bag is made of two rectangular sheets of porous material with a ratio of length and width, selected from the interval of values 7 ÷ 8.6: 1. 4. The infusion bag according to claim 1, in which the ratio of the length of the squeezing yarn with respect to the length of the bag is selected from the range of 4 ÷ 5.5: 1. 5. The infusion bag according to claim 1, in which one cut is made on the side of each of its ends, designed to bring out one of the free ends of the squeeze thread out of the bag. 6. The infusion bag according to claim 1, in which the node that covers each of the end sides of the bag is made in the form of an annular loop with coils wound around it with the free end of the squeeze thread, which forms an annular loop, turns, with the number of turns and the pitch between them are selected on the basis of the need to ensure reliable fixation of the node, as well as the degree of rigidity of the ring-shaped loop with coils wound around it, required to allow the other end of the squeeze thread to pass through the center ring-shaped st loop. 7. The infusion bag according to claim 1, wherein the open longitudinal sections of the workpiece from one or two porous sheets are joined by a weld. 8. The infusion bag according to claim 1, in which open longitudinal sections of the workpiece from one porous sheet of non-heat-sealable material are joined by rolling. 9. The infusion bag according to claim 1, wherein a label is attached to a loop formed on the outside of the bag by squeezing thread. 10. The infusion bag according to claim 9, in which the squeeze thread is made of two segments, the ends of which are not involved in the formation of nodes on the end sides of the bag, are connected in a place closed by a label.

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