CA3234342A1 - Filter for smoking products and method for producing such filters - Google Patents
Filter for smoking products and method for producing such filters Download PDFInfo
- Publication number
- CA3234342A1 CA3234342A1 CA3234342A CA3234342A CA3234342A1 CA 3234342 A1 CA3234342 A1 CA 3234342A1 CA 3234342 A CA3234342 A CA 3234342A CA 3234342 A CA3234342 A CA 3234342A CA 3234342 A1 CA3234342 A1 CA 3234342A1
- Authority
- CA
- Canada
- Prior art keywords
- filter
- covering body
- manner
- region
- blank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000391 smoking effect Effects 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000011049 filling Methods 0.000 claims abstract description 24
- 239000000047 product Substances 0.000 description 15
- 238000004804 winding Methods 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 235000019504 cigarettes Nutrition 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000000306 component Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 241000208125 Nicotiana Species 0.000 description 2
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052729 chemical element Inorganic materials 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 230000002844 continuous effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
Landscapes
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Abstract
A filter (1) for smoking products has a filter body (2) that has a tubular sheathing (3) radially surrounding a filling made of filter material (5). The sheathing (3) has a cylindrical inner circumference (9) and a substantially conical outer circumference (10).
Description
Filter for smoking products and method for producing such filters The invention relates to a filter for smoking products, having a filter body which has a tubular covering body which radially surrounds a filling made of filter mate-rial. The invention further relates to a method for producing such a filter.
Such filters are known in various configurations and may either already be ar-ranged in the factory in smoking products, such as cigarettes, or as loose filters for use by the end consumer for customer production of the smoking product.
The present invention relates in particular to the loose filters last mentioned.
Such filters generally have a cylindrical shape, in particular having a diameter which remains constant over the respective entire length thereof. Accordingly, such filters generally also have a circular diameter. Furthermore, filters having a conical outer shape are also known. Such conical filters are typically produced from a solid material and have no separate covering body.
In the filter bodies which are in the form of solid material filters, the entire filter generally comprises a filter material. Furthermore filter bodies which have a sleeve member in which the filter material is received or arranged at the inner side are generally known. Such sleeve bodies are typically in the form of a cylin-drical pipe having end elements which are arranged at the end side. The filter Date Recue/Date Received 2024-04-02
Such filters are known in various configurations and may either already be ar-ranged in the factory in smoking products, such as cigarettes, or as loose filters for use by the end consumer for customer production of the smoking product.
The present invention relates in particular to the loose filters last mentioned.
Such filters generally have a cylindrical shape, in particular having a diameter which remains constant over the respective entire length thereof. Accordingly, such filters generally also have a circular diameter. Furthermore, filters having a conical outer shape are also known. Such conical filters are typically produced from a solid material and have no separate covering body.
In the filter bodies which are in the form of solid material filters, the entire filter generally comprises a filter material. Furthermore filter bodies which have a sleeve member in which the filter material is received or arranged at the inner side are generally known. Such sleeve bodies are typically in the form of a cylin-drical pipe having end elements which are arranged at the end side. The filter Date Recue/Date Received 2024-04-02
2 material is in this instance arranged inside the pipe between the end elements.
These end elements generally have the same diameter.
In particular with smoking products which are produced by end consumers, it has been found that, when cylindrical filters are used and there is even only a slight deviation from a linear twisting of the cigarette paper around the filter, a gap may be produced between the filter and cigarette paper which is often undesira-ble and can lead to a decreased or completely absent filter effect.
It has further been found that the production complexity, in particular for coni-cally constructed filters and the shaping thereof, and the orientation of conical filters in a correct manner during the production of smoking products during in-sertion in the factory is considerable and such filters are therefore still relatively complex and cost-intensive in terms of production and further processing, in par-ticular handling.
An object of the present invention is therefore to provide a filter for smoking products which is improved with regard to at least one of the mentioned disad-vantages and which in particular enables a non-complex application and a cost-effective production.
The object set is achieved by the invention with a filter having the features of the main claim and by a method having the features of claim 10. Advantageous em-bodiments and further development of the invention are disclosed in the depend-ent claims, the description and the Figures.
According to the invention, there is provision for the in particular separately con-figured covering body to radially surround the filling made of filter material at the outer side and to have in the longitudinal extent of the filter body a cylindrical inner circumference and a substantially conical outer circumference. In particu-lar, the covering body has a cylindrical inner form and a substantially conical outer form. On the one hand, an always identical filter effectiveness is thereby enabled, in particular even with a cigarette paper which is produced by the end consumer and which is in this instance not quite precisely twisted.
Furthermore, with a first, preferred embodiment, a particularly cost-effective production is en-Date Recue/Date Received 2024-04-02
These end elements generally have the same diameter.
In particular with smoking products which are produced by end consumers, it has been found that, when cylindrical filters are used and there is even only a slight deviation from a linear twisting of the cigarette paper around the filter, a gap may be produced between the filter and cigarette paper which is often undesira-ble and can lead to a decreased or completely absent filter effect.
It has further been found that the production complexity, in particular for coni-cally constructed filters and the shaping thereof, and the orientation of conical filters in a correct manner during the production of smoking products during in-sertion in the factory is considerable and such filters are therefore still relatively complex and cost-intensive in terms of production and further processing, in par-ticular handling.
An object of the present invention is therefore to provide a filter for smoking products which is improved with regard to at least one of the mentioned disad-vantages and which in particular enables a non-complex application and a cost-effective production.
The object set is achieved by the invention with a filter having the features of the main claim and by a method having the features of claim 10. Advantageous em-bodiments and further development of the invention are disclosed in the depend-ent claims, the description and the Figures.
According to the invention, there is provision for the in particular separately con-figured covering body to radially surround the filling made of filter material at the outer side and to have in the longitudinal extent of the filter body a cylindrical inner circumference and a substantially conical outer circumference. In particu-lar, the covering body has a cylindrical inner form and a substantially conical outer form. On the one hand, an always identical filter effectiveness is thereby enabled, in particular even with a cigarette paper which is produced by the end consumer and which is in this instance not quite precisely twisted.
Furthermore, with a first, preferred embodiment, a particularly cost-effective production is en-Date Recue/Date Received 2024-04-02
3 abled by the covering body first being produced and subsequently an end ele-ment being fitted to a first axial end of the covering body, subsequently from a second axial end filter material being introduced into the inner space surrounded by the covering body and, in order to finish the filter, finally the inner volume being closed by fitting a second end element to a second axial end. Since the covering body has a cylindrical inner shape, the first and second end elements may be configured identically, which minimizes the production complexity. In another conceivable embodiment, in which the filter material is configured in a dimensionally stable, cylindrical manner, for example, from a porous material, the filter body may be formed by directly fitting the covering body radially around the filter material and the associated production of the conical outer form of the filter. Thus, with the covering body which is fitted directly around the fill-ing of the filter material and optionally around two end elements, a cylindrical filter body may in a particularly simple manner be additionally provided with a conical outer form.
Generally, the axial end of the conical filter body, also referred to below as the first axial end, which has the comparatively smaller outer diameter, is arranged at the axial side facing the end consumer or smoker, and the other axial end of the filter, also referred to below as the second axial end, which has the compara-tively larger outer diameter, is arranged at the axial side, facing away from the end consumer, of the filter.
The filter body may have an overall length between 10 mm and 40 mm, prefera-bly between 20 mm and 30 mm, in a particularly preferred manner approximate-ly 25 mm. The filter body may in particular have a length which corresponds to the length of the entire filter. The outer diameter of the filter body may in its longitudinal extent, for example, vary between 5 mm and 8 mm, in particular increase in an axial direction. Preferably, the diameter of the filter body at the first axial end is approximately 6 mm and at the second axial end is approxi-mately 7 mm. The filter body is preferably formed exclusively by the covering body and the two end elements at the ends. The filling of the filter material is located in particular in an inner space formed between the inner circumference of the covering body - and the optionally provided two end elements. The end ele-ments are in particular configured to be permeable to air. Furthermore, they may Date Recue/Date Received 2024-04-02
Generally, the axial end of the conical filter body, also referred to below as the first axial end, which has the comparatively smaller outer diameter, is arranged at the axial side facing the end consumer or smoker, and the other axial end of the filter, also referred to below as the second axial end, which has the compara-tively larger outer diameter, is arranged at the axial side, facing away from the end consumer, of the filter.
The filter body may have an overall length between 10 mm and 40 mm, prefera-bly between 20 mm and 30 mm, in a particularly preferred manner approximate-ly 25 mm. The filter body may in particular have a length which corresponds to the length of the entire filter. The outer diameter of the filter body may in its longitudinal extent, for example, vary between 5 mm and 8 mm, in particular increase in an axial direction. Preferably, the diameter of the filter body at the first axial end is approximately 6 mm and at the second axial end is approxi-mately 7 mm. The filter body is preferably formed exclusively by the covering body and the two end elements at the ends. The filling of the filter material is located in particular in an inner space formed between the inner circumference of the covering body - and the optionally provided two end elements. The end ele-ments are in particular configured to be permeable to air. Furthermore, they may Date Recue/Date Received 2024-04-02
4 be configured in a dimensionally stable manner. For example, the end elements are formed from ceramic material. Both end elements of a filter may be con-structed and configured in an identical manner, in particular have the same di-mensions.
The covering body is configured with relatively thin walls so that the filter body may be in the form of a pipe. In particular, the covering body has a thickness in a radial direction which with respect to a diameter of the entire filter is signifi-cantly smaller. This thickness of the covering body which is pronounced in a ra-dial direction changes in the longitudinal extent of the filter. In particular, the covering body has at the first axial end of the filter a smaller thickness than at the second axial end of the filter. For example, the thickness of the covering body at the first end is approximately 0.11 mm and at the second end approxi-mately 0.6 mm. The covering body may be constructed at least partially over the longitudinal extent of the filter in layers, in particular in a manner building up in the direction of the outer circumference. The thickness of the covering body which increases in the longitudinal extent of the filter body may consequently be produced by layers of different thicknesses in the longitudinal extent. The cover-ing material may thus in the region of the first axial end, for example, be config-ured only in a single layer and, at the second axial end, for example, in a plurali-ty of layers which are arranged in a radial direction one above the other. In par-ticular, the layers of the covering material may increase in the direction from the first axial end to the second axial end in steps and/or in a substantially continu-ous manner. It is thereby possible for the covering body to have a cylindrical shape at an inner circumference and a conical shape at an outer circumference.
The filter material may, for example, be configured in a granular and/or porous manner. In particular, the filter material may comprise activated carbon or in-clude activated carbon components.
The smoking product may comprise plant components, such as, for example, to-bacco, or be formed thereby. The smoking product may comprise medically ef-fective substances. It has been found that, as a result of the activated carbon filter, although a significant portion of harmful substances can be filtered out of Date Recue/Date Received 2024-04-02 the inhaled smoke, a large portion of the medically effective substances can pass through the filter.
Preferably, the covering body is formed by winding a blank to form a dimension-
The covering body is configured with relatively thin walls so that the filter body may be in the form of a pipe. In particular, the covering body has a thickness in a radial direction which with respect to a diameter of the entire filter is signifi-cantly smaller. This thickness of the covering body which is pronounced in a ra-dial direction changes in the longitudinal extent of the filter. In particular, the covering body has at the first axial end of the filter a smaller thickness than at the second axial end of the filter. For example, the thickness of the covering body at the first end is approximately 0.11 mm and at the second end approxi-mately 0.6 mm. The covering body may be constructed at least partially over the longitudinal extent of the filter in layers, in particular in a manner building up in the direction of the outer circumference. The thickness of the covering body which increases in the longitudinal extent of the filter body may consequently be produced by layers of different thicknesses in the longitudinal extent. The cover-ing material may thus in the region of the first axial end, for example, be config-ured only in a single layer and, at the second axial end, for example, in a plurali-ty of layers which are arranged in a radial direction one above the other. In par-ticular, the layers of the covering material may increase in the direction from the first axial end to the second axial end in steps and/or in a substantially continu-ous manner. It is thereby possible for the covering body to have a cylindrical shape at an inner circumference and a conical shape at an outer circumference.
The filter material may, for example, be configured in a granular and/or porous manner. In particular, the filter material may comprise activated carbon or in-clude activated carbon components.
The smoking product may comprise plant components, such as, for example, to-bacco, or be formed thereby. The smoking product may comprise medically ef-fective substances. It has been found that, as a result of the activated carbon filter, although a significant portion of harmful substances can be filtered out of Date Recue/Date Received 2024-04-02 the inhaled smoke, a large portion of the medically effective substances can pass through the filter.
Preferably, the covering body is formed by winding a blank to form a dimension-
5 ally stiff sleeve body in order to be able to receive the filter material in the inner space thereof. An effective filter action and a particularly cost-effective produc-tion of the filter are thereby enabled. To this end, the blank may in particular be in the form of in particular a thin, flat body, for example, made of paper.
The covering body may also be wound at least partially, preferably, completely around the filling made of filter material.
In a particularly preferred manner, the covering body is arranged or wound at least partially in an overlapping manner, in particular overlapping with itself. In this instance, the covering body may at the beginning of the winding extend over .. substantially the entire length of the filter body. The covering body may bear on the end elements and/or on the filling made of filter material, and in the remain-ing extent of the windings be arranged to overlap with itself, in particular in-creasingly overlapping. The overall thickness of the covering body can thereby be increased in a radial direction over the longitudinal extent of the filter body in a particularly simple manner so that the covering body, as a result of the windings which increasingly overlap in the longitudinal extent of the filter, on the whole receives a conical outer shape.
The covering body is preferably formed from a paper blank. A material which is particularly suitable for the lateral, in particular radial closure of the filter materi-al, a precise and precisely fitting closure of the covering body at the outer sides of the filter, in particular the axial ends, and a cost-effective production of the filter are thereby enabled. The paper blank may, for example, be produced as a blank or piece of a paper strip. The paper blank preferably has, in particular for .. the overlapping winding around the filling made of filter material and the option-ally provided end elements, an overall length between 80 mm and 300 mm, preferably between 100 mm and 200 mm, in a particularly preferred manner of approximately 150 mm. The paper blank or the paper strip preferably has a width which corresponds to the length of the filter body. Consequently, the paper blank can be placed with a wide side in a precisely fitting manner on the filling Date Recue/Date Received 2024-04-02
The covering body may also be wound at least partially, preferably, completely around the filling made of filter material.
In a particularly preferred manner, the covering body is arranged or wound at least partially in an overlapping manner, in particular overlapping with itself. In this instance, the covering body may at the beginning of the winding extend over .. substantially the entire length of the filter body. The covering body may bear on the end elements and/or on the filling made of filter material, and in the remain-ing extent of the windings be arranged to overlap with itself, in particular in-creasingly overlapping. The overall thickness of the covering body can thereby be increased in a radial direction over the longitudinal extent of the filter body in a particularly simple manner so that the covering body, as a result of the windings which increasingly overlap in the longitudinal extent of the filter, on the whole receives a conical outer shape.
The covering body is preferably formed from a paper blank. A material which is particularly suitable for the lateral, in particular radial closure of the filter materi-al, a precise and precisely fitting closure of the covering body at the outer sides of the filter, in particular the axial ends, and a cost-effective production of the filter are thereby enabled. The paper blank may, for example, be produced as a blank or piece of a paper strip. The paper blank preferably has, in particular for .. the overlapping winding around the filling made of filter material and the option-ally provided end elements, an overall length between 80 mm and 300 mm, preferably between 100 mm and 200 mm, in a particularly preferred manner of approximately 150 mm. The paper blank or the paper strip preferably has a width which corresponds to the length of the filter body. Consequently, the paper blank can be placed with a wide side in a precisely fitting manner on the filling Date Recue/Date Received 2024-04-02
6 made of filter material and the optionally provided end elements and, in the lon-gitudinal extent thereof in the circumferential direction of the filter body which is intended to be formed, can be wound around the filling made of filter material.
The paper thickness is preferably approximately 0.11 mm. Consequently, in addi-tion to an effective filter action, a visually appealing filter can be achieved.
The paper blank comprises in a preferred embodiment of the invention a first region which per se is configured in a substantially rectangular manner or in terms of its shape corresponds to a rectangle, and a second region which per se is configured in a substantially triangular manner or in terms of its shape corre-sponds to a triangle and adjoins the first region. The paper blank consequently preferably extends in a coherent manner over the first region and the second region.
Preferably, the second region in the region of a longitudinal side, in particular a longitudinal side opposite the rectangular region, has a portion which in a state in which the covering body is completely wound around the filling made of filter material and the optionally provided end elements forms an outer circumferential face of the covering body, also referred to as the visible region. The portion, which forms the visible region, of the paper blank has a width which is preferably between 1 mm and 5 mm, preferably between 2 mm and 4 mm, in a particularly preferred manner of approximately 3.5 mm. In a particularly preferred manner, the circumferential face of the covering body or the filter is formed exclusively by a portion of the paper blank which forms the visible region. This portion or this visible region may be provided with an imprint, in particular a continuous print-ing.
Preferably, the covering body bears in the region of at least one of the axial ends of the filter body with the cylindrical inner circumference on an end element of the filter at the end. It is thereby possible to give the filter body a dimensional stability in a particularly simple and appropriate manner and at the same time to enable a particularly effective filter action.
In a particularly preferred manner, only the covering body surrounds the filling made of filter material and the optionally provided end elements. This means Date Recue/Date Received 2024-04-02
The paper thickness is preferably approximately 0.11 mm. Consequently, in addi-tion to an effective filter action, a visually appealing filter can be achieved.
The paper blank comprises in a preferred embodiment of the invention a first region which per se is configured in a substantially rectangular manner or in terms of its shape corresponds to a rectangle, and a second region which per se is configured in a substantially triangular manner or in terms of its shape corre-sponds to a triangle and adjoins the first region. The paper blank consequently preferably extends in a coherent manner over the first region and the second region.
Preferably, the second region in the region of a longitudinal side, in particular a longitudinal side opposite the rectangular region, has a portion which in a state in which the covering body is completely wound around the filling made of filter material and the optionally provided end elements forms an outer circumferential face of the covering body, also referred to as the visible region. The portion, which forms the visible region, of the paper blank has a width which is preferably between 1 mm and 5 mm, preferably between 2 mm and 4 mm, in a particularly preferred manner of approximately 3.5 mm. In a particularly preferred manner, the circumferential face of the covering body or the filter is formed exclusively by a portion of the paper blank which forms the visible region. This portion or this visible region may be provided with an imprint, in particular a continuous print-ing.
Preferably, the covering body bears in the region of at least one of the axial ends of the filter body with the cylindrical inner circumference on an end element of the filter at the end. It is thereby possible to give the filter body a dimensional stability in a particularly simple and appropriate manner and at the same time to enable a particularly effective filter action.
In a particularly preferred manner, only the covering body surrounds the filling made of filter material and the optionally provided end elements. This means Date Recue/Date Received 2024-04-02
7 that the tubular potion of the filter body may be exclusively formed by the cover-ing body. A filter with particularly few individual components and consequently a particularly cost-effective production can thereby be achieved. Furthermore, the covering body may terminate in a particularly appropriate manner flush with the axial ends of the filter body so that a visually appealing shape - which can in particular be identified as one unit - is enabled. In this instance, there may be provision for the covering body to be connected at the end of the filter body to the end elements which are arranged at that location, in particular at least in an end region. The covering body, in particular a covering body which is in the form of a paper blank may to this end be adapted in a particularly simple manner to a preferred, in particular standardized length of the filter.
Preferably, the covering body forms with the cylindrical inner circumference the inner space for the filter material and forms with the substantially conical outer circumference a circumferential outer face of the filter body, in particular of the entire filter. In particular, the covering body may delimit over almost the entire length of the filter body an inner space for the filter material and where applica-ble also bear on the filling made of filter material. The inner space available for the filling of the filter material can thereby be particularly large and a particularly effective filter action can be achieved.
In a particularly preferred manner, at least one of the axial ends of the covering body is connected in a non-positive-locking manner to an end element at the end. In particular, the end element may be pressed into the axial end of the coy-ering body.
Furthermore, the covering body - in a particularly preferred manner - may be connected to itself in a materially engaging manner, for example, by means of adhesive-bonding, in particular in the region of the overlapping winding thereof.
To this end, on a flat side of the blank adhesive may be arranged at least in re-gions. Alternatively or additionally, adhesive may also be arranged on at least one of the end elements, in particular on a radial outer side or circumferential face of the end element. A particularly effective fixing of the end element on the covering body can thereby be achieved and consequently a particularly effective dimensional stability and filter action, and a visually appealing filter can be Date Recue/Date Received 2024-04-02
Preferably, the covering body forms with the cylindrical inner circumference the inner space for the filter material and forms with the substantially conical outer circumference a circumferential outer face of the filter body, in particular of the entire filter. In particular, the covering body may delimit over almost the entire length of the filter body an inner space for the filter material and where applica-ble also bear on the filling made of filter material. The inner space available for the filling of the filter material can thereby be particularly large and a particularly effective filter action can be achieved.
In a particularly preferred manner, at least one of the axial ends of the covering body is connected in a non-positive-locking manner to an end element at the end. In particular, the end element may be pressed into the axial end of the coy-ering body.
Furthermore, the covering body - in a particularly preferred manner - may be connected to itself in a materially engaging manner, for example, by means of adhesive-bonding, in particular in the region of the overlapping winding thereof.
To this end, on a flat side of the blank adhesive may be arranged at least in re-gions. Alternatively or additionally, adhesive may also be arranged on at least one of the end elements, in particular on a radial outer side or circumferential face of the end element. A particularly effective fixing of the end element on the covering body can thereby be achieved and consequently a particularly effective dimensional stability and filter action, and a visually appealing filter can be Date Recue/Date Received 2024-04-02
8 brought about. Furthermore, the filter is thereby particularly easy to handle both during production and during use.
The method according to the invention for producing a filter having the features of at least one of claims 1 and 9 makes provision, in order to form a filter body having a conical outer circumference, for a blank to be wound in an increasingly overlapping manner toward the covering body in the direction of one of the axial ends of the filter and to be connected to itself in a materially engaging manner, for an end element to be fitted to a first of the axial ends, preferably in a non-positive-locking manner, for a filling made of filter material to be introduced into an inner space surrounded by the covering body and the end element and for another end element to be fitted to a second of the axial ends, preferably in a non-positive-locking manner.
One exemplary embodiment of the invention is explained in greater detail below with reference to the Figures. Reference numerals which are the same refer to identical components. In the schematic drawings:
Figure 1 - shows a side view of a filter according to the invention;
Figure 2 - shows a sectioned illustration of the filter according to Figure 1;
and Figure 3 - shows a plan view of a paper blank for the covering body of the filter.
Figures 1 and 2 show an exemplary embodiment of a filter 1 according to the invention for use on smoking products, such as cigarettes. Such a filter 1 may be inserted into smoking products either in the factory or be provided as a loose filter for use by the end consumer for customer assembly of the smoking prod-uct.
The filter 1 is used during smoking particularly to filter out harmful substances or at least a portion of harmful substances from the smoke inhaled by a smoker.
In a finished smoking product, such as a cigarette, the present filter 1 is advanta-geously located in a region, which faces the smoker, of a body which forms the smoking product and which is not illustrated in this instance, such as a paper Date Recue/Date Received 2024-04-02
The method according to the invention for producing a filter having the features of at least one of claims 1 and 9 makes provision, in order to form a filter body having a conical outer circumference, for a blank to be wound in an increasingly overlapping manner toward the covering body in the direction of one of the axial ends of the filter and to be connected to itself in a materially engaging manner, for an end element to be fitted to a first of the axial ends, preferably in a non-positive-locking manner, for a filling made of filter material to be introduced into an inner space surrounded by the covering body and the end element and for another end element to be fitted to a second of the axial ends, preferably in a non-positive-locking manner.
One exemplary embodiment of the invention is explained in greater detail below with reference to the Figures. Reference numerals which are the same refer to identical components. In the schematic drawings:
Figure 1 - shows a side view of a filter according to the invention;
Figure 2 - shows a sectioned illustration of the filter according to Figure 1;
and Figure 3 - shows a plan view of a paper blank for the covering body of the filter.
Figures 1 and 2 show an exemplary embodiment of a filter 1 according to the invention for use on smoking products, such as cigarettes. Such a filter 1 may be inserted into smoking products either in the factory or be provided as a loose filter for use by the end consumer for customer assembly of the smoking prod-uct.
The filter 1 is used during smoking particularly to filter out harmful substances or at least a portion of harmful substances from the smoke inhaled by a smoker.
In a finished smoking product, such as a cigarette, the present filter 1 is advanta-geously located in a region, which faces the smoker, of a body which forms the smoking product and which is not illustrated in this instance, such as a paper Date Recue/Date Received 2024-04-02
9 blank and is surrounded thereby. The region, which faces away from the smoker, of the body which forms the smoking product which is not illustrated may, for example, surround tobacco.
The filter 1 has a tubular filter body 2, comprising a filling made of filter material 5, in each case an end element 6a, 6b which delimits at the axial ends 7a, 7b of the filter 1 the filling made of filter material 5, and a covering body 3 which sur-rounds the filling made of filter material 5 radially at the outer side. The covering body 3 is in this instance configured in such a manner that the filter body 2 has a conical outer form.
As shown in Figure 2, the covering body 3 and the end elements 6a, 6b form a supporting structure of the filter body 2. The filter body 2 is thereby advanta-geously configured in a dimensionally stable manner. The filling made of filter material 5 is arranged in an inner space 8 which is surrounded by the covering body 3 and the end elements 6a, 6b.
The first end element 6a is in particular arranged at a first axial end 7a, facing the smoker, of the filter 1 and a second end element 6b is arranged at a second axial end 7b, facing away from the smoker and in particular facing the tobacco, of the filter 1. The end element 6a, 6b advantageously has holes so that it is configured at least in an axial direction of the filter 1 in an air-permeable man-ner. An inner space 8 for the filter material 5 is arranged between its two axial ends.
The filter material 5 serves to filter the harmful substances when smoking.
The filter material 5 may in this instance comprise a plurality of different filter com-ponents. In a particularly preferred manner, the filter material 5 comprises acti-vated carbon, wherein a frequently preferred, selective filtering is enabled.
In order to bring about a particularly effective filtering, it is advantageous for the tubular portion of the filter body 2 on an inner circumference 9 which faces the filter material 5 to have a cylindrical form and on an outer circumference 10 which faces away from the filter material 5 to be configured in a conical manner over the longitudinal extent of the filter 1. In particular, it is advantageous for Date Recue/Date Received 2024-04-02 the outer diameter D1 of the filter 1 to be smaller at the first axial end 7a, facing the smoker, of the filter 1 than the outer diameter D2 of the filter 1 at a second axial filter end 7b facing away from the smoker. For example, the diameter D1 is approximately 6 mm und the diameter D2 is approximately 7 mm.
According to the invention, there is provision for the portion, which confers on the filter 1 a conical outer form or which forms a conical outer form of the filter 1, of the filter body 2 to be produced by the covering body 3 which is arranged around the filter material 5. In particular, the conical shaping is achieved by
The filter 1 has a tubular filter body 2, comprising a filling made of filter material 5, in each case an end element 6a, 6b which delimits at the axial ends 7a, 7b of the filter 1 the filling made of filter material 5, and a covering body 3 which sur-rounds the filling made of filter material 5 radially at the outer side. The covering body 3 is in this instance configured in such a manner that the filter body 2 has a conical outer form.
As shown in Figure 2, the covering body 3 and the end elements 6a, 6b form a supporting structure of the filter body 2. The filter body 2 is thereby advanta-geously configured in a dimensionally stable manner. The filling made of filter material 5 is arranged in an inner space 8 which is surrounded by the covering body 3 and the end elements 6a, 6b.
The first end element 6a is in particular arranged at a first axial end 7a, facing the smoker, of the filter 1 and a second end element 6b is arranged at a second axial end 7b, facing away from the smoker and in particular facing the tobacco, of the filter 1. The end element 6a, 6b advantageously has holes so that it is configured at least in an axial direction of the filter 1 in an air-permeable man-ner. An inner space 8 for the filter material 5 is arranged between its two axial ends.
The filter material 5 serves to filter the harmful substances when smoking.
The filter material 5 may in this instance comprise a plurality of different filter com-ponents. In a particularly preferred manner, the filter material 5 comprises acti-vated carbon, wherein a frequently preferred, selective filtering is enabled.
In order to bring about a particularly effective filtering, it is advantageous for the tubular portion of the filter body 2 on an inner circumference 9 which faces the filter material 5 to have a cylindrical form and on an outer circumference 10 which faces away from the filter material 5 to be configured in a conical manner over the longitudinal extent of the filter 1. In particular, it is advantageous for Date Recue/Date Received 2024-04-02 the outer diameter D1 of the filter 1 to be smaller at the first axial end 7a, facing the smoker, of the filter 1 than the outer diameter D2 of the filter 1 at a second axial filter end 7b facing away from the smoker. For example, the diameter D1 is approximately 6 mm und the diameter D2 is approximately 7 mm.
According to the invention, there is provision for the portion, which confers on the filter 1 a conical outer form or which forms a conical outer form of the filter 1, of the filter body 2 to be produced by the covering body 3 which is arranged around the filter material 5. In particular, the conical shaping is achieved by
10 means of a winding of the covering body material 3 in an overlapping manner which increases in the longitudinal extent of the filter 1. To this end, the covering body 3 is wound from a thin-walled blank 4, such as, for example, a paper blank, in particular in such a manner that the covering body 3 in the longitudinal extent of the filter 1 has a substantially conical outer circumference or a conical circum-ferential face 10.
At the inner circumference 9 thereof, in particular on the first winding, the covering body 3 has a substantially cylindrical form. The covering body 3 bears with the cylindrical inner circumference 9 in the region of the first axial end 7a on the first end element 6a and in the region of the second axial end 7b on the second end element 6b in such a manner that the end elements 6a, 6b are connected to the covering body 3 in a non-positive-locking manner. Not least as a result of the cylindrical inner circumference 9 of the covering body 3, the two end elements 6a, 6b of the filter 1 may be constructed and configured in an identical manner, in particular have the same dimensions. With the substantially conical outer circumference 10, the covering body 3 forms the circumferential outer face of the filter body 2, in particular of the entire filter 1.
The blank 4 may be an elongate paper strip which tapers in the longitudinal ex-tent thereof and in the longitudinal extent thereof is wound about itself and con-nected together in a materially engaging manner, in particular by means of ad-hesive bonding.
Such a paper blank 4 is shown, for example, in Figure 3.
Date Recue/Date Received 2024-04-02
At the inner circumference 9 thereof, in particular on the first winding, the covering body 3 has a substantially cylindrical form. The covering body 3 bears with the cylindrical inner circumference 9 in the region of the first axial end 7a on the first end element 6a and in the region of the second axial end 7b on the second end element 6b in such a manner that the end elements 6a, 6b are connected to the covering body 3 in a non-positive-locking manner. Not least as a result of the cylindrical inner circumference 9 of the covering body 3, the two end elements 6a, 6b of the filter 1 may be constructed and configured in an identical manner, in particular have the same dimensions. With the substantially conical outer circumference 10, the covering body 3 forms the circumferential outer face of the filter body 2, in particular of the entire filter 1.
The blank 4 may be an elongate paper strip which tapers in the longitudinal ex-tent thereof and in the longitudinal extent thereof is wound about itself and con-nected together in a materially engaging manner, in particular by means of ad-hesive bonding.
Such a paper blank 4 is shown, for example, in Figure 3.
Date Recue/Date Received 2024-04-02
11 The paper blank 4 shown comprises a first region 4a, which per se resembles a rectangle, and a second region 4b which per se resembles a triangle and adjoins the first region 4a at a side thereof. The second region 4b has at a longitudinal side a portion 4c which in a state, in which the covering body 3 is wound com-pletely around the end elements 6a, 6b and the filling made of filter material 5, forms the outer circumferential face 10 of the covering body 3, in particular a visible region. This portion 4c or this visible region is indicated with shading in Figure 3. The portion 4c may be provided with an imprint, in particular a contin-uous printing. In the above-mentioned completed state of the filter 1, the cir-cumferential face 10 of the covering body 3 is in particular exclusively formed by the portion 4c. The paper blank 4 consequently extends in a coherent manner over the regions 4a and 4b, including 4c.
The paper blank 4 has in the case shown an overall length L2 of approximately 150 mm. The first region 4a extends over a length L3 of approximately 36 mm.
The paper blank 4 has a width B1 of approximately 25 mm, which advantageous-ly corresponds to the length of the filter body 2. The portion 4c has in this in-stance a width B2 of approximately 3.5 mm.
Consequently, the paper blank 4 can be wound in order to form the covering body 3. The first winding completely covers in this instance in the case of the completed filter 1 with the first region 4a the filling made of filter material 5. In the case of the other winding of the paper blank 4, in particular with the second region 4b, the windings are carried out in the direction of the longitudinal extent of the filter in an increasingly overlapping manner, wherein the region at the first axial end 7a may also be formed without any overlapping of the paper blank 4.
The paper blank 4 thus overlaps with the second region 4b at least partially ini-tially the first region 4a and subsequently at least partially the second region 4b with itself. The portion 4c ultimately remains as the visible circumferential face, that is to say, the portion 4c is not covered or overlapped.
Consequently, the conical outer circumference of the filter 1 is formed in that the material which forms the covering body 3, in this instance in particular the paper blank 4, is wound in such a manner that the covering body material 3, that is to say, in particular the paper blank 4, is wound in an increasingly overlapping Date Recue/Date Received 2024-04-02
The paper blank 4 has in the case shown an overall length L2 of approximately 150 mm. The first region 4a extends over a length L3 of approximately 36 mm.
The paper blank 4 has a width B1 of approximately 25 mm, which advantageous-ly corresponds to the length of the filter body 2. The portion 4c has in this in-stance a width B2 of approximately 3.5 mm.
Consequently, the paper blank 4 can be wound in order to form the covering body 3. The first winding completely covers in this instance in the case of the completed filter 1 with the first region 4a the filling made of filter material 5. In the case of the other winding of the paper blank 4, in particular with the second region 4b, the windings are carried out in the direction of the longitudinal extent of the filter in an increasingly overlapping manner, wherein the region at the first axial end 7a may also be formed without any overlapping of the paper blank 4.
The paper blank 4 thus overlaps with the second region 4b at least partially ini-tially the first region 4a and subsequently at least partially the second region 4b with itself. The portion 4c ultimately remains as the visible circumferential face, that is to say, the portion 4c is not covered or overlapped.
Consequently, the conical outer circumference of the filter 1 is formed in that the material which forms the covering body 3, in this instance in particular the paper blank 4, is wound in such a manner that the covering body material 3, that is to say, in particular the paper blank 4, is wound in an increasingly overlapping Date Recue/Date Received 2024-04-02
12 manner in the direction of one of the axial ends, in particular in the direction to-ward the second axial end 7b facing away from a smoker. In particular, the wind-ings of the paper blank 4 overlap each other in the longitudinal extent of the fil-ter 1 at least partially and on the whole increasingly. The conical shape is thus achieved by the increasing number of windings. The overlapping portion of the covering body 3 is in this instance in particular formed by the second region 4b of the paper blank 4.
The overlapping windings are preferably distributed in a uniform manner over the longitudinal extent of the filter 1 so that in the longitudinal extent of the filter 1 a uniformly increasing thickness of the covering body 3 and consequently on the whole a uniformly conical outer form of the filter 1 is formed.
Depending on requirements, in order to form a larger or smaller diameter of the filter 1 at the second end 7b, in a particularly simple manner, the number of windings which are located one above the other can thus also be adjusted, in particular by the number of windings being adapted. The latter is in particular enabled by the length of the second region 4b of the paper blank 4 and/or the angle at the end, which is illustrated on the right in Figure 3, of the second re-gion 4b being adapted, in particular increased and/or decreased. After the cover-ing body 3 is formed, an end element 6a is fitted, in particular by means of pressing into the first axial end 7a. Subsequently, filter material 5 is introduced into the inner space 8, and this is then closed by another end element 6b, which to this end can also be pressed in.
Date Recue/Date Received 2024-04-02
The overlapping windings are preferably distributed in a uniform manner over the longitudinal extent of the filter 1 so that in the longitudinal extent of the filter 1 a uniformly increasing thickness of the covering body 3 and consequently on the whole a uniformly conical outer form of the filter 1 is formed.
Depending on requirements, in order to form a larger or smaller diameter of the filter 1 at the second end 7b, in a particularly simple manner, the number of windings which are located one above the other can thus also be adjusted, in particular by the number of windings being adapted. The latter is in particular enabled by the length of the second region 4b of the paper blank 4 and/or the angle at the end, which is illustrated on the right in Figure 3, of the second re-gion 4b being adapted, in particular increased and/or decreased. After the cover-ing body 3 is formed, an end element 6a is fitted, in particular by means of pressing into the first axial end 7a. Subsequently, filter material 5 is introduced into the inner space 8, and this is then closed by another end element 6b, which to this end can also be pressed in.
Date Recue/Date Received 2024-04-02
13 List of reference numerals:
1 Filter 2 Filter body 3 Covering body 4 Blank 4a First region 4b Second region 4c Portion 5 Filter material 6a End element 6b End element 7a First axial end 7b Second axial end 8 Inner space 9 Inner circumference 10 Outer circumference Li Length L2 Length L3 Length B1 Width B2 Width D1 Diameter D2 Diameter Date Recue/Date Received 2024-04-02
1 Filter 2 Filter body 3 Covering body 4 Blank 4a First region 4b Second region 4c Portion 5 Filter material 6a End element 6b End element 7a First axial end 7b Second axial end 8 Inner space 9 Inner circumference 10 Outer circumference Li Length L2 Length L3 Length B1 Width B2 Width D1 Diameter D2 Diameter Date Recue/Date Received 2024-04-02
Claims (8)
1. A filter (1) for smoking products, having a filter body (2) which has a tubular covering body (3) which radially surrounds a filling made of filter material (5), characterized in that the covering body (3) has a cylindrical inner circumference (9) and a substantially conical outer circumference (10).
2. The filter (1) as claimed in Claim 1, characterized in that the covering body (3) is formed from a planar blank (4).
3. The filter (1) as claimed in Claim 2, characterized in that the blank (4) is wound at least partially in an overlapping manner.
4. The filter (1) as claimed in one of the preceding Claims, characterized in that the blank (4) is a paper blank.
5. The filter (1) as claimed in Claim 3 or 4, characterized in that the blank (4) has a first region (4a), which is configured in a substantially rectangular manner, and a second region (4b) which is configured in a substantially triangular manner and adjoins the first region (4a).
6. The filter (1) as claimed in Claim, 5, characterized in that the second region (4b) has at a longitudinal side a portion (4c) which forms an outer circumferential face (10) of the covering body (3), in particular a visible region which may be printed.
7. The filter (1) as claimed in one of the preceding Claims, characterized in that the covering body (3) bears in the region of an axial end (7a, 7b) of the filter body (2) with the cylindrical inner circumference (9) on an end element (6a, 6b) of the filter body (2) at the end.
8. The filter (1) as claimed in one of the preceding Claims, characterized in that the covering body (3) bears with the cylindrical inner circumference (9) on Date Recue/Date Received 2024-04-02 the filling made of filter material (5) and forms with the substantially conical outer circumference (10) a circumferential outer face of the filter body (2), in particular of the entire filter (1).
5 9. The filter (1) as claimed in one of the preceding Claims, characterized in that the covering body (3) is connected in a non-positive-locking manner to at least one end element (6a, 6b) of the filter body (2) and/or is at least partially connected to itself in a materially engaging manner.
10 10. A method for producing a filter (1) having an inner circumference (9) which is cylindrical in the longitudinal extent and an outer circumference (10) which is conical in the longitudinal extent, characterized in that a blank (4) is wound in an increasingly overlapping manner toward the covering body (3) in the direction of one of the axial ends (7a, 7b) of the filter (1) and is connected to itself 15 preferably in a materially engaging manner, a first end element (6a) is fitted to a first of the axial ends (7a), preferably in a non-positive-locking manner, a filling made of filter material (5) is introduced into an inner space (8) surrounded by the covering body and the first end element (6a) and a second end element (6b) is fitted to a second of the axial ends (7b), preferably in a non-positive-locking manner.
Date Recue/Date Received 2024-04-02
5 9. The filter (1) as claimed in one of the preceding Claims, characterized in that the covering body (3) is connected in a non-positive-locking manner to at least one end element (6a, 6b) of the filter body (2) and/or is at least partially connected to itself in a materially engaging manner.
10 10. A method for producing a filter (1) having an inner circumference (9) which is cylindrical in the longitudinal extent and an outer circumference (10) which is conical in the longitudinal extent, characterized in that a blank (4) is wound in an increasingly overlapping manner toward the covering body (3) in the direction of one of the axial ends (7a, 7b) of the filter (1) and is connected to itself 15 preferably in a materially engaging manner, a first end element (6a) is fitted to a first of the axial ends (7a), preferably in a non-positive-locking manner, a filling made of filter material (5) is introduced into an inner space (8) surrounded by the covering body and the first end element (6a) and a second end element (6b) is fitted to a second of the axial ends (7b), preferably in a non-positive-locking manner.
Date Recue/Date Received 2024-04-02
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021125822.7 | 2021-10-05 | ||
| DE102021125822.7A DE102021125822B4 (en) | 2021-10-05 | 2021-10-05 | Filters for smoking products and method for producing such filters |
| PCT/EP2022/074863 WO2023057158A1 (en) | 2021-10-05 | 2022-09-07 | Filter for smoking products and method for producing such filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3234342A1 true CA3234342A1 (en) | 2023-04-13 |
Family
ID=83438943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3234342A Pending CA3234342A1 (en) | 2021-10-05 | 2022-09-07 | Filter for smoking products and method for producing such filters |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA3234342A1 (en) |
| DE (1) | DE102021125822B4 (en) |
| WO (1) | WO2023057158A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1094642A (en) | 1963-04-29 | 1967-12-13 | Gyula Laszlo Torok | Improvements in or relating to filters for tobacco smoke |
| DE1268417B (en) * | 1963-10-18 | 1968-05-16 | Efka Werke Kiehn Gmbh Fritz | Cigar holder |
| DE8419597U1 (en) | 1984-06-29 | 1984-09-27 | Denicotea GmbH, 5060 Bergisch Gladbach | DISPOSABLE TIP FOR CIGARETTES |
| DE102006021848B4 (en) | 2006-05-09 | 2009-09-24 | Radivoja Banovic | smoke filter |
| US20180137792A1 (en) * | 2016-11-16 | 2018-05-17 | Angela L. Gransaull | Smoking article identification system and method |
| DE102017005510A1 (en) * | 2017-06-12 | 2019-01-24 | Mohamed Oulabi | Filter for hookah |
| DE202018102075U1 (en) * | 2018-04-16 | 2018-07-19 | Stefanie Ricks | Cigarette paper |
| US20210386114A1 (en) * | 2019-04-04 | 2021-12-16 | Jt International S.A. | Aerosol Generating Article with Shaped Multi-Textured Filter |
-
2021
- 2021-10-05 DE DE102021125822.7A patent/DE102021125822B4/en active Active
-
2022
- 2022-09-07 WO PCT/EP2022/074863 patent/WO2023057158A1/en active Application Filing
- 2022-09-07 CA CA3234342A patent/CA3234342A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021125822B4 (en) | 2024-02-22 |
| DE102021125822A1 (en) | 2023-04-06 |
| WO2023057158A1 (en) | 2023-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU657002B2 (en) | Tobacco smoke filter | |
| WO2007135414A1 (en) | Tobacco smoke filter | |
| EP2440076B1 (en) | Smoking article | |
| AU658372B2 (en) | Smoke filter containing particulate smoke modifying additive | |
| CN102231958B (en) | Smoking article filter | |
| EP2170109B1 (en) | Filter and method for making a filter for a cigarette | |
| IE32825B1 (en) | Cigarette filter and method for its manufacture | |
| EP2073651A1 (en) | Tobacco smoke filter | |
| JP2018521644A (en) | Telescopic coaxial filter cigarette and related production method, filter rod production machine, and filter chip attachment machine | |
| GB2119221A (en) | Cigarette filter | |
| CA3234342A1 (en) | Filter for smoking products and method for producing such filters | |
| EP2866595B1 (en) | Tobacco smoke filter | |
| WO2009156269A1 (en) | Filter for a smoking article | |
| WO2008075032A1 (en) | Tobacco smoke filter | |
| EP0777425B1 (en) | Concentric core filter | |
| US3064541A (en) | Machine for making filter units for cigarettes | |
| KR20190025694A (en) | Smoking articles and manufacturing methods thereof | |
| CN101448416A (en) | Tobacco smoke filter | |
| JPS61249378A (en) | Ventilated tobacco filter | |
| JPH0115274B2 (en) | ||
| GB2136669A (en) | Cigarette filter | |
| GB2260477A (en) | Smoke filter containing particulate smoke modifying additive | |
| JP7508479B2 (en) | Method for manufacturing a smoking article filter | |
| GB2101869A (en) | Filtering means | |
| EP0209319A1 (en) | A filter-tipped tobacco product with spirally applied wrapper, and a method of manufacturing the product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20240516 |