CA2012891A1 - Re-useable brewing filter - Google Patents
Re-useable brewing filterInfo
- Publication number
- CA2012891A1 CA2012891A1 CA 2012891 CA2012891A CA2012891A1 CA 2012891 A1 CA2012891 A1 CA 2012891A1 CA 2012891 CA2012891 CA 2012891 CA 2012891 A CA2012891 A CA 2012891A CA 2012891 A1 CA2012891 A1 CA 2012891A1
- Authority
- CA
- Canada
- Prior art keywords
- filter
- coffee
- fluted
- brewing
- support
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J31/00—Apparatus for making beverages
- A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
- A47J31/08—Paper filter inlays therefor to be disposed after use
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Apparatus For Making Beverages (AREA)
- Filtering Materials (AREA)
Abstract
ABSTRACT
A re-useable coffee, tea, brewing filter comprised of long-chain synthetic polymere or polyamide with the addition of polyethelene in the extrusion process, this synthetic fibre is then designed with interstices of a controlled and uniformed size and weight.
This filter is heat set to a fluted frustum-conical, or funnel moulded shape. This filter needs no outside support skeleton or ribs to maintain its' shape, under any condition of distortion. This filter is soft and very flexible, But will automatically assume its' original shape. The upper rim of the filter is the only area of a solid non-porous medium, it is fused to a solid, which helps maintain its' strength in maintaining its' shape. The non-fluted flat area defines the bottom area, with the fluted walls urging the remainder of the filter material toward engagement with the filter basket or support structure side wall area. Differences in size of support basket and filter will automatically be accomodated by extension or compression of interstices in a controlled uniformed manner.
A re-useable coffee, tea, brewing filter comprised of long-chain synthetic polymere or polyamide with the addition of polyethelene in the extrusion process, this synthetic fibre is then designed with interstices of a controlled and uniformed size and weight.
This filter is heat set to a fluted frustum-conical, or funnel moulded shape. This filter needs no outside support skeleton or ribs to maintain its' shape, under any condition of distortion. This filter is soft and very flexible, But will automatically assume its' original shape. The upper rim of the filter is the only area of a solid non-porous medium, it is fused to a solid, which helps maintain its' strength in maintaining its' shape. The non-fluted flat area defines the bottom area, with the fluted walls urging the remainder of the filter material toward engagement with the filter basket or support structure side wall area. Differences in size of support basket and filter will automatically be accomodated by extension or compression of interstices in a controlled uniformed manner.
Description
~ 2~
. .
REUSE~BLE BREWING FILTER
Background of the invention This invention pertains to the art of filters and more particularly to brewing filters.
The invention is particularly applicable to a reuseable filter for automatic coffee brewing apparat:uses' and will be described with reference thereto, However,it will be appreciated by those skilled in the art that the concepts of the invention have broader applications and may be utilized in other environments and apparatuses' for filtering o~her liquid-cake like substances.
Hydrostatic head drip type coffee makers have been used in commercial establishments for years, In recent years~ However, Drip type coffee makers ~or home or office have been introduced into the marketplace and have recieved recognition, Basically, Drip type coffee makers utilize a measured amount of dried co~ee granules placed in a filter basket which communicates with hot water. A pre-determined amount o hot water is introduced into the ilter basket to intermlx with the coffee granules and be converted into coffee.This coffee then flows through the septum of the basket into a conventional serving container. There are a vast amount of coffee maker manufacturers in the world, The most common drip type manufacturers are under names like, Mr-coffee, Bunn, Cory, Sears, Westbend, Proctor-silex, Sunbeam, G.E, etc. In coniunction with drip coffee ma~ers, A filter is inserted into the basket which in turn recieves the coffee granules, This filter acts to prevent the granules from passing through the filter basket into the serving container. The vast majority of these filters have been constuctèd from paper material, As such, They are only useable once and are then discarded alang with the coffee grounds when brewing has been completed. A problem with paper filters is that they are thorough in their clarification, When one uses good quality blends o~ fresh R&G coffee, the filtration should not be so thorough, Richly aromatic cofee particles ( still below 100 to 20~ mesh ) ou~ht to be allowed through into tbe serving container. This "leakage" can be acheived by controlled interstice size of the present invention.
The user at present has no choice of the porosities of filter paper he can buy. The consumer simply uses what papers are commercially available and lets it go at that. The present invention comes in three porosities "fine" "medium'l "coarse".
Improper brewing is a waste of a natural resource, the good green coffee bean. Another problem with the prior art of ~ilter paper and fibrous materials is that they are a good adsorbent of foreign odors and taste, Filter papers pick up foreign odors, And these often are transmitted to the consumers coffee beverage.
Even if the filter papers arrived at the restaurant or home in odor free conditions, The kitchens are usually moist and have splcy, meaty, fishy, and doughy~and possibly smokey odors in the air, These kitchen volatile odors after adsorption on the filter papexs are Oxidized and Chemically modified to give objectionable resulting odors and taste. Most retail paper filters are sold in units of 100, and more often then not, in ordinary cardboard 2~28g~
boxes. In the supermarket, These papers pick up some exotic odors and taste, Llke detergents and perfumes, Whereas the present invention is non-absorbent of odors or taste, Accordingly, it has been found desirable to develop a permanent type, Flow controllable, Re~useable filter construction which is both easy to clean, soft non-metallic, non-fiborous, that would overcome the problems which have been encountered with prior filter designs for coffee brewers. The present invention provides new filter designs which are easy to manufacture, inexpensive, And re-useable for an extended period of time. Another object of the present invention is to help alliviate the countrys solid waste problem~ with already overburdened :Land fills. As well as air born pollutants from manufacturing of paper filters, such as Hydrogen-Sulfide and Chlorine being emmitted into the atmosphere during manufacturing process. And if the paper ~ilters are incinerated that process releases lar~e concentratlons of ammonia into the atmosphere. These air borne emmisions are in the tonnage per-day in just the united states alone. Therefore an object of the present invention is one of environmental management as a re-useable brewing filter.
20~2~
Brief description of the inYentiOn In accordance with the present invention, there is provided a new re-useable cofee brewing filter construction. This ~ilter is comprised of any long-chain synthetic polymer, or polymide, composed of at least ~5% of an ester, or recurring amide groups.
With a specific gravity of 1.14 to 1.38. It should be that o~ a hlgh density polymere for maximum operating temperature of around 300 deyrees F. Have a high resistance to acids, and alkalies, as well as oxidizing agents, and solvents. This fibre is then sguare weaved. For good flow rate and cake discharge, The interstice of the cross threads of the weaves, for the preferred embodiment of the present invention for "fine" coffee granules, be .0070in, and for "medium" .00~3in, and for "coarse" .0098in, the ilter is then mechanically moulded into a fluted~frustum conical shape.
The top rim of the moulded ilter is a solid non-porous fused section. with a depth of approximately l/8inch for added support during, and after any distortion. The filter is made only of the same fibre with no-associated stucture afixed to it, or bonded to it. The filter can be moulded into any desired shape to fit in association with an associated support, or recieving structure, but the preferred embodiment is the fluted-frustum conical shape, or any shape therein. The principal object of the present invention, is the provision of a "new" improved re-useable (ecological) brewing filter construction. Another object of the present invention is the provision of such a filter construction which is flexible, but firm in its support shape, with no skeleton support structure. Which is an improvement and advantage over prior art. All prior art ~uses skeletal support structures, constructed from materials that are mechanically bonded to the face of the filter medium, making the filter non flexible and hard to clean, which is an important part of a good brewing filter, The non-volatile pigments present in " R&G " coffee, tend to penetrate the fibres of most screen type filter ~medium, because of the addition of a comonomer into the molecule, interferinq with the crystallization of the fibres. Therefore ~permanently staining the filter. An object of the ~present inYention is to increase the degree of crystallinity, and the degree of orientation of the molecules, with respect to the fibres~axis. Therefore pigment will to the least degree ~diffuse ~into the fibre matrix. The pre~sent invention therefore is very easily cleanable, and will last an extended period of time.
Another ~bject o the present invention, is the provision of a reuseable brewing filter construction, that is simple, and inexpensive to manufacture. Still another object of the present invention, is the~ provision of a filter construction which is readily adapted to use in a number of different environments, for different applications. Other advantages of the subject invention, will become readily apparent, to those skilled in the art upon a reading and understanding of the following drawinqs and specifications.
2~2~
- Breif description of drawings The present invention may take physical ~orm in certain parts~
and arrangements of parts, preferred and alternative embodiments of which will be described in detail in the specifications, and illustrated in the accompanying drawings, which form a part hereof and wherein:
FIG.l Is a perspective view illustrating the invention ~ormed in accordance with the concepts of the present invention.
FIG.2 Is a perspective view showing the ~ilter construction of fig.1 as it is being inserted'into a brewing funnel of a drip ~-0 type coffeemaker.
FIG.3 Is a perspective view showing an alternative shape or a'different funnel basket shape of another drip type coffeemaker.
DETAILED DESCRIPTION OF THE PREFERRED AND
ALTERNATIVE EMBODIMENTS
Referring now to the drawings wherein the showings are for purposes of illustrating the preferred and alternative embodiments of the invention only, and not for the purposes of limiting same. Fig.l shows a coffee brewing filter construction comprised of a thin, flexible filter having a fluted-frustum conical shape, with a support rim of fused material.
More particularly, filter material (A) has a fluted inner face ~1) a fluted outer face (2) and an outer support peripheral edge (3). In the arrangement shown, and for the purposes of~ '' utilization, in a conventional drip type coffeemaker funnel basket, edge t3) is contoured to the fluted side wall shape.
Although other configurations' could also be utilized to accomodate a particular filter application, filter material (A) could be comprised of any number of different materials such as polypropylene and polyvinylchloride, or a metallic mesh, or a fiborous~material incorporating a resin. However in the preferred embodiment of the present invention, a particular polyethelene terephthalate fibre comprised of a square weave construction is needed. Fibres are manufactured and marketed in di~ferent types and classes, as well as different chemical compositions and ~processes. The porosity, permeability or interstice opening sizes of filter material (A) are selected in three sizes which will allow the desired 1Ow of liquid through the coffee and through the filter, while preventing passage of the coffee grounds. The ployethelene terephthalate used in the preferred embodiment of the present invention can have a molecular weight of 12,000 20,000, with a preferred density of 1.40-1.45 and Tg in the range of 70-80 degrees celsius, and a moisture regain of 0.40%. This is desired, when the filter is '-to be employed with brewing coffeemakers in order to prevent absorbing oils from the coffee qranuIes during extended periods of use. Any such absorption might otherwise render the coffee bitter or rancid. The flat bottom (4) of f'ilter ~A) is the main septum from hydrostatic i .
~12,~
drip head liquid, that flow through coffee granules to server container. Extending to base of fluted side wall supports (5) and generally extending vertically to the bottom of fused peripheral edge ~3) the outer peripheral edge ~3) helps support a integral collapse under cake expansion, ~rom liquid absorption in brewing process, while in the ridgid supporting structure, as well as aids in automatic shape resumption. The design of the present invention, allows for the present invention to occupy a total space, in communication with the supportlng structure, in that the flat bottom ~4) extending to fluted side wall bass ~5) has no skeletal support rib to terminate expansion o septum area ~4) therefore moulds itself to the full shape o the supporting brewing funnel basket, taking full advantage of each manufacturers drip head plurality arrangement for hot water flow.
If coffee granule surface is reduced, the water flow will drip a large percentage of water through the sida walls of a fixed sized rib supported filte, thereby reducing saturation of coee granules, therefore reducing effective brewing and filtration of coffee granules. As shown in fig ~1) there are 24 flutes on the side wall (1,2) this is to acilitate ease of bending between 1ute sets. ~ach flute is lcm apart from the peripheral edge of the base (4) extending vertically while increasing in width, to the rim t3) of 2cm apart. With the flat bottom ~9) diameter of 8cm. with a vertical inclination from 180 to 130 degrees, a 50 degree angle from fluted outer edge (2) and inner edge (1) with a free standing filter resting form, the outer peripheral edge diameter (3) of 15cm, this preferred shape allows for a wide variety of adaptation to conventional brewing funnels. But the preferred shape of the present invention, does not limit the present invention from being moulded and manufactured in different shapes and demensions to suit a particular support structure, as is shown in fig 3. The precise method of manufacture may, to some extent, be dictated by the specifics of the intended filter application. For the purpose of the present invention as a brewing filter for coffeemakers, it is particularly desired that there be no skeleton, but the composition of the fibre be that, that it will be made, so that there is no extensive rotation of large segments of the molecules below 100 degrees C. So that when moulded in the manufacturing process, if the filter is distorted from mechanical stresses and tempèrature stress, that the filter fibres will remember, and return to there original geometry. Thus this filter from other material compositions that tend to return to a linear geometry when heated above Tg. Also the composition of the fibre used in the present invention is soft and easily handled, but when it is heat formed into the shape of figure (1) it is fairly ridgid on the outer peripheral edge (3) which helps to keep form to the filter construction Fig.(2) Shows the filter construction of fig (1) as it is being inserted into a filter basket for a drip type coffeemaker. Fig.(3) is another common coffee filter shape used in home drip type coffeemakers. it is more of a funnel shape with an opening on the top, then narrowing 3/4 of the way down the side walls, at this point the filter is bonded to form a closed valley at the bottom, the excess is removed, since the filter is 20 ~.2~
bein~ crimped from a conical funnel shape, the bottom is a blunt srtaight edge that is fused together to block liquid flow through it, the liquid flows through the side walls into the basket to the narrowed centre area of the basket, providing deeper concentration of coffee saturation. There are other designs of funnels which the present invention can be utilized for, the general showing of fig ~2) should allow those skilled in the art to readily appreciate the inventive aspects of the new re-useable fil~er, and its ease of installation that is virtually the same as that of the common paper filter. Filter material inner face (1) faces upwardly from the filter basket with support rim (3) and flat bottom (9). fluted outer ~ace (2) faces downwardly toward filter basket. The filter is simply pushed into the filter basket in the direction of association with basket and filter common geometry. In order to generally assume the same cup shape configuration of the filter basket. The side wall fluted dimensions will contract or expand, and will appear as larger folds or smaller folds, depending on the basket. The filter construction may be categorized as self-folding. ~fter one of the above, two descrlbed filter embodiments, has been used for maXing a pot of coffee, it may be removed from the filter basket for disposing of the coffee grounds, thereafter the filter may be washed, or otherwise cleaned for subsequent re-use at the next occasion of brewing. The brewing filter of the present invention facilitates such re-use for extended periods of time, without physical deterioration, and or, without adversely affecting the quality of taste, of the coffee. While the embodiments of the filter which has been disclosed above, may be varied as deemed necessary, or appropriate, to accomodate particular filter applications, f~r example, smaller sized filters, it may be desirable to change ~uantity and size of flutes. But for use in typical coffeemakers, the present invention designs are sufficient. Obviously, modificatlons and alterations will occur to others upon reading and understanding of the specif~cation, it is my intention to include all such modifications, and alterations, insofar as they come within the scope of the appended claims, or the equivalents thereof. Having thus descibed my invention, I now claim:
. .
REUSE~BLE BREWING FILTER
Background of the invention This invention pertains to the art of filters and more particularly to brewing filters.
The invention is particularly applicable to a reuseable filter for automatic coffee brewing apparat:uses' and will be described with reference thereto, However,it will be appreciated by those skilled in the art that the concepts of the invention have broader applications and may be utilized in other environments and apparatuses' for filtering o~her liquid-cake like substances.
Hydrostatic head drip type coffee makers have been used in commercial establishments for years, In recent years~ However, Drip type coffee makers ~or home or office have been introduced into the marketplace and have recieved recognition, Basically, Drip type coffee makers utilize a measured amount of dried co~ee granules placed in a filter basket which communicates with hot water. A pre-determined amount o hot water is introduced into the ilter basket to intermlx with the coffee granules and be converted into coffee.This coffee then flows through the septum of the basket into a conventional serving container. There are a vast amount of coffee maker manufacturers in the world, The most common drip type manufacturers are under names like, Mr-coffee, Bunn, Cory, Sears, Westbend, Proctor-silex, Sunbeam, G.E, etc. In coniunction with drip coffee ma~ers, A filter is inserted into the basket which in turn recieves the coffee granules, This filter acts to prevent the granules from passing through the filter basket into the serving container. The vast majority of these filters have been constuctèd from paper material, As such, They are only useable once and are then discarded alang with the coffee grounds when brewing has been completed. A problem with paper filters is that they are thorough in their clarification, When one uses good quality blends o~ fresh R&G coffee, the filtration should not be so thorough, Richly aromatic cofee particles ( still below 100 to 20~ mesh ) ou~ht to be allowed through into tbe serving container. This "leakage" can be acheived by controlled interstice size of the present invention.
The user at present has no choice of the porosities of filter paper he can buy. The consumer simply uses what papers are commercially available and lets it go at that. The present invention comes in three porosities "fine" "medium'l "coarse".
Improper brewing is a waste of a natural resource, the good green coffee bean. Another problem with the prior art of ~ilter paper and fibrous materials is that they are a good adsorbent of foreign odors and taste, Filter papers pick up foreign odors, And these often are transmitted to the consumers coffee beverage.
Even if the filter papers arrived at the restaurant or home in odor free conditions, The kitchens are usually moist and have splcy, meaty, fishy, and doughy~and possibly smokey odors in the air, These kitchen volatile odors after adsorption on the filter papexs are Oxidized and Chemically modified to give objectionable resulting odors and taste. Most retail paper filters are sold in units of 100, and more often then not, in ordinary cardboard 2~28g~
boxes. In the supermarket, These papers pick up some exotic odors and taste, Llke detergents and perfumes, Whereas the present invention is non-absorbent of odors or taste, Accordingly, it has been found desirable to develop a permanent type, Flow controllable, Re~useable filter construction which is both easy to clean, soft non-metallic, non-fiborous, that would overcome the problems which have been encountered with prior filter designs for coffee brewers. The present invention provides new filter designs which are easy to manufacture, inexpensive, And re-useable for an extended period of time. Another object of the present invention is to help alliviate the countrys solid waste problem~ with already overburdened :Land fills. As well as air born pollutants from manufacturing of paper filters, such as Hydrogen-Sulfide and Chlorine being emmitted into the atmosphere during manufacturing process. And if the paper ~ilters are incinerated that process releases lar~e concentratlons of ammonia into the atmosphere. These air borne emmisions are in the tonnage per-day in just the united states alone. Therefore an object of the present invention is one of environmental management as a re-useable brewing filter.
20~2~
Brief description of the inYentiOn In accordance with the present invention, there is provided a new re-useable cofee brewing filter construction. This ~ilter is comprised of any long-chain synthetic polymer, or polymide, composed of at least ~5% of an ester, or recurring amide groups.
With a specific gravity of 1.14 to 1.38. It should be that o~ a hlgh density polymere for maximum operating temperature of around 300 deyrees F. Have a high resistance to acids, and alkalies, as well as oxidizing agents, and solvents. This fibre is then sguare weaved. For good flow rate and cake discharge, The interstice of the cross threads of the weaves, for the preferred embodiment of the present invention for "fine" coffee granules, be .0070in, and for "medium" .00~3in, and for "coarse" .0098in, the ilter is then mechanically moulded into a fluted~frustum conical shape.
The top rim of the moulded ilter is a solid non-porous fused section. with a depth of approximately l/8inch for added support during, and after any distortion. The filter is made only of the same fibre with no-associated stucture afixed to it, or bonded to it. The filter can be moulded into any desired shape to fit in association with an associated support, or recieving structure, but the preferred embodiment is the fluted-frustum conical shape, or any shape therein. The principal object of the present invention, is the provision of a "new" improved re-useable (ecological) brewing filter construction. Another object of the present invention is the provision of such a filter construction which is flexible, but firm in its support shape, with no skeleton support structure. Which is an improvement and advantage over prior art. All prior art ~uses skeletal support structures, constructed from materials that are mechanically bonded to the face of the filter medium, making the filter non flexible and hard to clean, which is an important part of a good brewing filter, The non-volatile pigments present in " R&G " coffee, tend to penetrate the fibres of most screen type filter ~medium, because of the addition of a comonomer into the molecule, interferinq with the crystallization of the fibres. Therefore ~permanently staining the filter. An object of the ~present inYention is to increase the degree of crystallinity, and the degree of orientation of the molecules, with respect to the fibres~axis. Therefore pigment will to the least degree ~diffuse ~into the fibre matrix. The pre~sent invention therefore is very easily cleanable, and will last an extended period of time.
Another ~bject o the present invention, is the provision of a reuseable brewing filter construction, that is simple, and inexpensive to manufacture. Still another object of the present invention, is the~ provision of a filter construction which is readily adapted to use in a number of different environments, for different applications. Other advantages of the subject invention, will become readily apparent, to those skilled in the art upon a reading and understanding of the following drawinqs and specifications.
2~2~
- Breif description of drawings The present invention may take physical ~orm in certain parts~
and arrangements of parts, preferred and alternative embodiments of which will be described in detail in the specifications, and illustrated in the accompanying drawings, which form a part hereof and wherein:
FIG.l Is a perspective view illustrating the invention ~ormed in accordance with the concepts of the present invention.
FIG.2 Is a perspective view showing the ~ilter construction of fig.1 as it is being inserted'into a brewing funnel of a drip ~-0 type coffeemaker.
FIG.3 Is a perspective view showing an alternative shape or a'different funnel basket shape of another drip type coffeemaker.
DETAILED DESCRIPTION OF THE PREFERRED AND
ALTERNATIVE EMBODIMENTS
Referring now to the drawings wherein the showings are for purposes of illustrating the preferred and alternative embodiments of the invention only, and not for the purposes of limiting same. Fig.l shows a coffee brewing filter construction comprised of a thin, flexible filter having a fluted-frustum conical shape, with a support rim of fused material.
More particularly, filter material (A) has a fluted inner face ~1) a fluted outer face (2) and an outer support peripheral edge (3). In the arrangement shown, and for the purposes of~ '' utilization, in a conventional drip type coffeemaker funnel basket, edge t3) is contoured to the fluted side wall shape.
Although other configurations' could also be utilized to accomodate a particular filter application, filter material (A) could be comprised of any number of different materials such as polypropylene and polyvinylchloride, or a metallic mesh, or a fiborous~material incorporating a resin. However in the preferred embodiment of the present invention, a particular polyethelene terephthalate fibre comprised of a square weave construction is needed. Fibres are manufactured and marketed in di~ferent types and classes, as well as different chemical compositions and ~processes. The porosity, permeability or interstice opening sizes of filter material (A) are selected in three sizes which will allow the desired 1Ow of liquid through the coffee and through the filter, while preventing passage of the coffee grounds. The ployethelene terephthalate used in the preferred embodiment of the present invention can have a molecular weight of 12,000 20,000, with a preferred density of 1.40-1.45 and Tg in the range of 70-80 degrees celsius, and a moisture regain of 0.40%. This is desired, when the filter is '-to be employed with brewing coffeemakers in order to prevent absorbing oils from the coffee qranuIes during extended periods of use. Any such absorption might otherwise render the coffee bitter or rancid. The flat bottom (4) of f'ilter ~A) is the main septum from hydrostatic i .
~12,~
drip head liquid, that flow through coffee granules to server container. Extending to base of fluted side wall supports (5) and generally extending vertically to the bottom of fused peripheral edge ~3) the outer peripheral edge ~3) helps support a integral collapse under cake expansion, ~rom liquid absorption in brewing process, while in the ridgid supporting structure, as well as aids in automatic shape resumption. The design of the present invention, allows for the present invention to occupy a total space, in communication with the supportlng structure, in that the flat bottom ~4) extending to fluted side wall bass ~5) has no skeletal support rib to terminate expansion o septum area ~4) therefore moulds itself to the full shape o the supporting brewing funnel basket, taking full advantage of each manufacturers drip head plurality arrangement for hot water flow.
If coffee granule surface is reduced, the water flow will drip a large percentage of water through the sida walls of a fixed sized rib supported filte, thereby reducing saturation of coee granules, therefore reducing effective brewing and filtration of coffee granules. As shown in fig ~1) there are 24 flutes on the side wall (1,2) this is to acilitate ease of bending between 1ute sets. ~ach flute is lcm apart from the peripheral edge of the base (4) extending vertically while increasing in width, to the rim t3) of 2cm apart. With the flat bottom ~9) diameter of 8cm. with a vertical inclination from 180 to 130 degrees, a 50 degree angle from fluted outer edge (2) and inner edge (1) with a free standing filter resting form, the outer peripheral edge diameter (3) of 15cm, this preferred shape allows for a wide variety of adaptation to conventional brewing funnels. But the preferred shape of the present invention, does not limit the present invention from being moulded and manufactured in different shapes and demensions to suit a particular support structure, as is shown in fig 3. The precise method of manufacture may, to some extent, be dictated by the specifics of the intended filter application. For the purpose of the present invention as a brewing filter for coffeemakers, it is particularly desired that there be no skeleton, but the composition of the fibre be that, that it will be made, so that there is no extensive rotation of large segments of the molecules below 100 degrees C. So that when moulded in the manufacturing process, if the filter is distorted from mechanical stresses and tempèrature stress, that the filter fibres will remember, and return to there original geometry. Thus this filter from other material compositions that tend to return to a linear geometry when heated above Tg. Also the composition of the fibre used in the present invention is soft and easily handled, but when it is heat formed into the shape of figure (1) it is fairly ridgid on the outer peripheral edge (3) which helps to keep form to the filter construction Fig.(2) Shows the filter construction of fig (1) as it is being inserted into a filter basket for a drip type coffeemaker. Fig.(3) is another common coffee filter shape used in home drip type coffeemakers. it is more of a funnel shape with an opening on the top, then narrowing 3/4 of the way down the side walls, at this point the filter is bonded to form a closed valley at the bottom, the excess is removed, since the filter is 20 ~.2~
bein~ crimped from a conical funnel shape, the bottom is a blunt srtaight edge that is fused together to block liquid flow through it, the liquid flows through the side walls into the basket to the narrowed centre area of the basket, providing deeper concentration of coffee saturation. There are other designs of funnels which the present invention can be utilized for, the general showing of fig ~2) should allow those skilled in the art to readily appreciate the inventive aspects of the new re-useable fil~er, and its ease of installation that is virtually the same as that of the common paper filter. Filter material inner face (1) faces upwardly from the filter basket with support rim (3) and flat bottom (9). fluted outer ~ace (2) faces downwardly toward filter basket. The filter is simply pushed into the filter basket in the direction of association with basket and filter common geometry. In order to generally assume the same cup shape configuration of the filter basket. The side wall fluted dimensions will contract or expand, and will appear as larger folds or smaller folds, depending on the basket. The filter construction may be categorized as self-folding. ~fter one of the above, two descrlbed filter embodiments, has been used for maXing a pot of coffee, it may be removed from the filter basket for disposing of the coffee grounds, thereafter the filter may be washed, or otherwise cleaned for subsequent re-use at the next occasion of brewing. The brewing filter of the present invention facilitates such re-use for extended periods of time, without physical deterioration, and or, without adversely affecting the quality of taste, of the coffee. While the embodiments of the filter which has been disclosed above, may be varied as deemed necessary, or appropriate, to accomodate particular filter applications, f~r example, smaller sized filters, it may be desirable to change ~uantity and size of flutes. But for use in typical coffeemakers, the present invention designs are sufficient. Obviously, modificatlons and alterations will occur to others upon reading and understanding of the specif~cation, it is my intention to include all such modifications, and alterations, insofar as they come within the scope of the appended claims, or the equivalents thereof. Having thus descibed my invention, I now claim:
Claims (7)
1. A re-usable coffee or tea, brewing filter which is generally a fluted-frustum conical shape, wherein the present invention has no support skeleton affixed to any face, of said filter material, for giving support thereto, but has a fused outer peripheral edge which aids in support, and is of the same chemical composition.
Said fused outer rim is part of the filter shape, and runs down the side walls which are tapered, fluted walls, ending on a bottom, which is the centrally located part of the the filter that is circular and flat. And is a generally fluted cup-shaped configuration, therefor when said filter is inserted into said filter support; the said fluted side walls extending from the bottom of said filter press outwardly to the inside walls of said support structure, they compress or expand depending on the size ratio of said filter to support structure inside walls.
Said fused outer rim is part of the filter shape, and runs down the side walls which are tapered, fluted walls, ending on a bottom, which is the centrally located part of the the filter that is circular and flat. And is a generally fluted cup-shaped configuration, therefor when said filter is inserted into said filter support; the said fluted side walls extending from the bottom of said filter press outwardly to the inside walls of said support structure, they compress or expand depending on the size ratio of said filter to support structure inside walls.
2. A brewing filter or liquid filter comprising a polyethelene terephthalate monofilament fibre, of a high density, with a specific gravity of 1.14 to 1.38, with a maximum operating temperature of approximately 300degrees F, with a high resistance to chemical attack, a transition temperature of 70 to 80degrees C, and a moisture regain of 0.01%, that is weaved, plain,chain,twill,satin, with an interstice of between .0070in to.0098in.
3. The brewing filter fibre defined in claim (2) to be used in the construction of a brewing filter for coffeemakers, That has the ability to be heat set to a fixed shape configuration as described in claim (1). or any formed, self-supporting configuration for use as a brewing filter.
4. The filter as defined in claims (1,2,3,) wherein the fluted frustum conical, or funnel shape, with an outer peripheral edge that is fused to a solid fairly ridgid medium of itself, or of a different material, which is an only aid in the support of the filter form. that helps retain its' geometric shape after mechanical stresses are exerted against its' moulded geometric form.
5. A permanent re-useable coffee brewing filter, as defined in claims (1,2,3,4,) having a central portion, and a fluted outer peripheral edge, with no other support skeleton other then what has been described in the preceeding claims, and including a plurality of spaced apart, generally around centre portion, and extending outwardly and upwardly from said central portion, toward said outer peripheral edge, at the outer peripheral edge the fibres are fused to produce a solid non-porous section, which aids in the form support.
6. A permanent re-useable brewing filter, comprising of claims (1 to 5) with three different porosities adapted to filter coffee of different grain sizes, in drip type coffeemakers, with liquid flow through coffee cake to the filter septum area, and through the septum interstices to server container. the filter being that which is defined as the present invention, and not limited to the exact shapes as illustrated in the drawings of the preferred form.
7. A re-useable coffee or tea, brewing filter comprising a polyethelene terephthalate fibre, or a nylon, acrylic, modacrylic, teflon, glass, chemical composition, to be used in the construction of a re-useable coffee brewing filter for drip type coffeemakers.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2012891 CA2012891A1 (en) | 1990-03-22 | 1990-03-22 | Re-useable brewing filter |
| PCT/CA1991/000065 WO1991014389A1 (en) | 1990-03-22 | 1991-03-04 | Re-useable brewing filter |
| AU73421/91A AU7342191A (en) | 1990-03-22 | 1991-03-04 | Re-useable brewing filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2012891 CA2012891A1 (en) | 1990-03-22 | 1990-03-22 | Re-useable brewing filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2012891A1 true CA2012891A1 (en) | 1991-09-22 |
Family
ID=4144582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2012891 Abandoned CA2012891A1 (en) | 1990-03-22 | 1990-03-22 | Re-useable brewing filter |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU7342191A (en) |
| CA (1) | CA2012891A1 (en) |
| WO (1) | WO1991014389A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014127467A1 (en) * | 2013-02-25 | 2014-08-28 | 2266170 Ontario Inc. | Single serve capsule for improved extraction efficiency and flavor retention |
| US9428329B2 (en) | 2013-08-20 | 2016-08-30 | 2266170 Ontario Inc. | System for making capsule containing a dosing agent |
| US9428328B2 (en) | 2011-09-01 | 2016-08-30 | 2266170 Ontario Inc. | Beverage capsule |
| US9688465B2 (en) | 2012-11-12 | 2017-06-27 | 2266170 Ontario Inc. | Beverage capsule and process and system for making same |
| US9700171B2 (en) | 2013-04-03 | 2017-07-11 | 2266170 Ontario Inc. | Capsule machine and components |
| US10154752B2 (en) | 2013-05-23 | 2018-12-18 | 2266170 Ontario Inc. | Capsule housing |
| US10314319B2 (en) | 2013-11-20 | 2019-06-11 | 2266170 Ontario Inc. | Method and apparatus for accelerated or controlled degassing of roasted coffee |
| US10336531B2 (en) | 2014-03-21 | 2019-07-02 | 2266170 Ontario Inc. | Capsule with steeping chamber |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19841890A1 (en) * | 1998-09-11 | 2000-03-16 | Braun Gmbh | Permanent filter for filtering tea or coffee several times has a sieving part with folds |
| US6602410B1 (en) | 2000-11-14 | 2003-08-05 | The Procter & Gamble Comapny | Water purifying kits |
| EP2444138A1 (en) * | 2010-10-19 | 2012-04-25 | Sidney Lenz | Polypropylene filter. |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2546874A (en) * | 1947-06-18 | 1951-03-27 | Nelson J Siegrist | Lining for coffee-making instrumentalities |
| US3250398A (en) * | 1960-02-29 | 1966-05-10 | Pall Corp | Beverage filters |
| DE2314892A1 (en) * | 1973-03-26 | 1974-10-03 | Guenter Kotte | PERMANENT COFFEE FILTER CONVERSIBLE IN DIFFERENT SIZES AND AS ROUND COFFEE FILTER INSERT FOR COFFEE MACHINES |
| FR2530446A1 (en) * | 1982-01-04 | 1984-01-27 | Mandar M | Filtering element for permanent use, intended for the production of aromatic extracts, particularly of coffee, with or without a filtering device. |
| GB2120951A (en) * | 1982-06-03 | 1983-12-14 | Long Sing Ng Kenneth | Beverage filters |
| DE3434687A1 (en) * | 1984-09-21 | 1986-04-03 | Hans 5067 Kürten Schmitz | Coffee filter |
| DE3817749A1 (en) * | 1988-02-08 | 1989-08-17 | Kap Inc | Filter for coffee machines serving to prepare coffee and preferably usable in the household |
| JP2613274B2 (en) * | 1988-09-01 | 1997-05-21 | 株式会社クラレ | Synthetic paper |
-
1990
- 1990-03-22 CA CA 2012891 patent/CA2012891A1/en not_active Abandoned
-
1991
- 1991-03-04 AU AU73421/91A patent/AU7342191A/en not_active Abandoned
- 1991-03-04 WO PCT/CA1991/000065 patent/WO1991014389A1/en unknown
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9428328B2 (en) | 2011-09-01 | 2016-08-30 | 2266170 Ontario Inc. | Beverage capsule |
| US9688465B2 (en) | 2012-11-12 | 2017-06-27 | 2266170 Ontario Inc. | Beverage capsule and process and system for making same |
| WO2014127467A1 (en) * | 2013-02-25 | 2014-08-28 | 2266170 Ontario Inc. | Single serve capsule for improved extraction efficiency and flavor retention |
| US9700171B2 (en) | 2013-04-03 | 2017-07-11 | 2266170 Ontario Inc. | Capsule machine and components |
| US10154752B2 (en) | 2013-05-23 | 2018-12-18 | 2266170 Ontario Inc. | Capsule housing |
| US9428329B2 (en) | 2013-08-20 | 2016-08-30 | 2266170 Ontario Inc. | System for making capsule containing a dosing agent |
| US10351277B2 (en) | 2013-08-20 | 2019-07-16 | 2266170 Ontario Inc. | Process for making a capsule containing a dosing agent |
| US10611507B2 (en) | 2013-08-20 | 2020-04-07 | 2266170 Ontario Inc. | Capsule with control member |
| US10314319B2 (en) | 2013-11-20 | 2019-06-11 | 2266170 Ontario Inc. | Method and apparatus for accelerated or controlled degassing of roasted coffee |
| US10336531B2 (en) | 2014-03-21 | 2019-07-02 | 2266170 Ontario Inc. | Capsule with steeping chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1991014389A1 (en) | 1991-10-03 |
| AU7342191A (en) | 1991-10-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |