초록 ▼

A pad of the optionally flexible, disc-shaped/flat type filled with a product to be extracted and/or a product to be dissolved, provided with an optionally flexible bottom sheet and an optionally flexible top sheet manufactured from, the top sheet and the bottom sheet being interconnected at their l

A pad of the optionally flexible, disc-shaped/flat type filled with a product to be extracted and/or a product to be dissolved, provided with an optionally flexible bottom sheet and an optionally flexible top sheet manufactured from, the top sheet and the bottom sheet being interconnected at their longitudinal edges so that a covering with a circumferential sealing seam is formed, with the product situated between the top sheet and the bottom sheet, the bottom sheet and the top sheet each forming a filter which is at least virtually impermeable to the product and which is at least permeable to water, while an area of the covering is designed to be at least virtually impermeable to water, the area comprising, preferably, at least one annular sub-area covering at least a part of the sealing seam, and that the area extends outside the sealing seam at predetermined positions.

대표청구항 ▼

1. A pad containing a coffee product to be extracted for preparing a beverage, the pad comprising: a substantially flexible bottom sheet manufactured from filtering paper and having a circumferential edge, anda substantially flexible top sheet manufactured from filtering paper and having a circumfer

1. A pad containing a coffee product to be extracted for preparing a beverage, the pad comprising: a substantially flexible bottom sheet manufactured from filtering paper and having a circumferential edge, anda substantially flexible top sheet manufactured from filtering paper and having a circumferential edge,wherein the top sheet and the bottom sheet are interconnected at their circumferential edges to form a covering with a circumferential sealing seam with the coffee product situated between the top sheet and the bottom sheet,wherein the bottom sheet and the top sheet each form a filter which is substantially impermeable to the product and which is permeable to water,wherein the covering outside the sealing seam is substantially flexible, wherein the covering includes an impermeable area that is substantially impermeable to water, the impermeable area is disposed along an annular portion of the sealing seam and extends from the annular portion of the sealing seam over only a limited portion of the bottom sheet, limited to ensure that the bottom sheet remains permeable to water,wherein the annular impermeable area comprises, at the bottom sheet, an annular bottom sheet sub-area which extends radially inside the sealing seam,wherein part of the impermeable sub-area that extends radially inside the sealing seam is adjacent to the coffee product at the bottom sheet, andwherein the annular impermeable area extends only adjacent to the coffee product at the bottom sheet,wherein the annular impermeable area is further provided with at least one of a fixing opening and an indentation, so that in use the pad can be accurately positioned in a holder having at least one co-operating projection to ensure that in use, the area that extends inwardly of the sealing seam is configured to cover at least one pressure limit opening of the holder and to allow water to flow under the annular impermeable area to the at least one pressure limit openings to discharge water and have the pressure in the holder rise no further only when the pressure in the holder will increase to a threshold pressure, which causes the pressure drop across the pad to be very small, and the pad and annular impermeable area are no longer firmly pressed against the bottom. 2. The pad according to claim 1, wherein the annular bottom sheet sub-area is part of the sealing seam. 3. The pad according to claim 2, wherein the annular bottom sheet sub-area provides a first annular seam part of the sealing seam. 4. The pad according to claim 3, wherein the sealing seam comprises a second annular seam part which embraces the first annular seam part and outside of the at least substantially water impermeable area of the bottom sheet. 5. The pad according to claim 1, wherein the annular bottom sheet sub-area forms the entire sealing seam. 6. The pad according to claim 1, wherein the annular bottom sheet sub-area extends along the sealing seam and provides at least a part of the sealing seam, wherein the area further comprises, at the bottom sheet, parts forming the annular impermeable portion at an inside edge of the bottom sheet sub-area inwardly of the sealing seam. 7. The pad according to claim 1, wherein the area comprises, at the bottom sheet, an elongate first strip-shaped bottom area sub-area, which extends diametrically of the bottom sheet. 8. The pad according to claim 7, wherein the ends of the first strip-shaped bottom sheet sub-area are located in or are adjacent to a part of the sealing seam. 9. The pad according to claim 8, wherein the area of the bottom sheet comprises an elongate second strip-shaped bottom sheet sub-area, which extends diametrically of the bottom sheet. 10. The pad according to claim 9, wherein the ends of the second strip-shaped bottom sheet sub-area are located in or are adjacent to a part of the sealing seam. 11. The pad according to claim 10, wherein the first strip-shaped bottom sheet sub-area and the second strip-shaped bottom sheet sub-area include an angle different from zero. 12. The pad according to claim 11, wherein said angle is substantially equal to 90 degrees. 13. The pad according to claim 9, wherein the first strip-shaped bottom sheet sub-area and the second strip-shaped bottom sheet sub-area intersect. 14. The pad according to claim 1, wherein the bottom sheet comprises a non-woven material which has undergone a heat treatment in the area. 15. The pad according to claim 1, wherein the bottom sheet comprises a coating which has undergone a heat treatment in the area of the bottom sheet. 16. The pad according to claim 1, wherein the area of the bottom sheet comprises a coating which is at least substantially impermeable to water. 17. The pad according to claim 1, wherein the area of the bottom sheet comprises an additional film which is applied to the bottom sheet consisting of filtering paper at one of the inside and the outside of the pad and which is at least substantially impermeable to water. 18. The pad according to claim 1, wherein the bottom sheet is manufactured from a material that is at least substantially impermeable to water, which is perforated for obtaining a filter. 19. The pad according to claim 1, wherein the bottom sheet is substantially cup-shaped. 20. The pad according to claim 19, wherein the pad is substantially symmetrical across a flat plane extending through the sealing seam. 21. The pad according to claim 1, wherein the top sheet is substantially flat. 22. The pad according to claim 1, wherein the covering is flexible. 23. The pad according to claim 1, wherein the pad is flexible. 24. The pad according to claim 1, wherein the surface of the predetermined positions where the area extends outside the sealing seam is relatively small with regard to the surface of the covering outside the sealing seam and outside the area. 25. The pad according to claim 1, wherein the top sheet outside the sealing seam rests, at least substantially, on the product. 26. A pad and holder assembly for making a beverage, the assembly comprising: a pad filled with at least one of a coffee product to be extracted and a creamer product to be dissolved by hot water during use for preparing a beverage, the pad having a bottom sheet manufactured from filtering paper and a top sheet manufactured from filtering paper, the top sheet and the bottom sheet interconnected at their circumferential edges to form a covering with a circumferential sealing seam with the product situated between the top sheet and the bottom sheet such that the bottom sheet and the top sheet each form a filter which is at least substantially impermeable to the product and which is at least permeable to water, the pad comprises at least one annular bottom sheet sub-area which is impermeable to water, wherein the least one annular bottom sheet sub-area is disposed along an annular portion of the sealing seam and extends radially inside the sealing seam over only a limited portion of the bottom sheeta holder having a bottom and an upstanding sidewall, the bottom having at least one outflow opening, the pad resting on the bottom,wherein the bottom of the holder includes at least one pressure limit opening and positioned to cooperate with the at least one annular bottom sheet sub-area of the pad,wherein the at least one annular bottom sheet sub-area of the pad seam covers the at least one pressure limit opening in the holder and is configured to only open and release pressure when a threshold pressure is reached in the holder, andwherein the impermeable at least one annular bottom sheet sub-area area does not extend over the top sheet. 27. A pad filled with at least one of a product to be extracted and a product to be dissolved for preparing a beverage and is configured to be placed in a holder having a bottom with at least one pressure limit opening therein so that in use hot water is provided under pressure to the pad the pad comprising: a substantially flexible bottom sheet and a substantially flexible top sheet, the top sheet and the bottom sheet each having an outer edge being interconnected at their outer edges so that a covering with a circumferential sealing seam is formed with the at least one product situated between the top sheet and the bottom sheet, the bottom sheet and the top sheet each form a filter which is substantially impermeable to the at least one product and which is permeable to water, wherein the covering outside the sealing seam is substantially flexible, wherein the pad in use rests on the bottom of the holder, wherein the covering includes an impermeable area that is substantially impermeable to water and is disposed along an annular portion of the sealing seam, wherein the impermeable area comprises at least one of: at least one annular impermeable sub-area extending outside the sealing seam at predetermined positions; anda plurality of impermeable sub-areas separate from each other and extending outside the sealing seam at predetermined positions, and wherein the impermeable area at the bottom sheet covers the at least one pressure limit opening of the holder when the pad is received in the holder;wherein the at least one annular sub-area comprises, at the bottom sheet, an annular bottom sheet sub-area which extends inside and outside the sealing seam; andwherein the annular impermeable portion does not extend over the top sheet. 28. The pad according to claim 26, wherein the annular bottom sheet sub-area forms at least a part of the sealing seam. 29. The pad according to claim 28, wherein the annular bottom sheet sub-area provides a first annular seam part of the sealing seam. 30. The pad according to claim 27, wherein the annular bottom sheet sub-area extends along the sealing seam and provides at least a part of the sealing seam, wherein the impermeable area further comprises, at the bottom sheet, parts forming the at least one annular impermeable sub-area at an inside edge of the annular bottom sheet sub-area outside the sealing seam. 31. The pad according to claim 27, wherein the impermeable area of the covering comprises, at the bottom sheet, a first strip-shaped bottom sheet sub-area which extends along at least a part of a diameter of the bottom sheet. 32. The pad according to claim 27, wherein the impermeable area of the covering comprises an annular top sheet sub-area extending out from the sealing seam across a portion of the top sheet. 33. The pad according to claim 32 wherein the annular top sheet sub-area is disposed across the entire sealing seam. 34. The pad according to claim 32, wherein the annular top sheet sub-area covers a part of the sealing seam. 35. The pad according to claim 27, wherein the at least one annular sub-area comprises, at the top sheet, an annular bottom sheet sub-area extending along the sealing seam while the impermeable area further comprises, at the top sheet, parts forming the at least one annular impermeable sub-area at an inside edge of the top sheet outside the sealing seam. 36. The pad according to claim 27, wherein the top sheet comprises an annular top sheet part of which first ring segments form part of the impermeable area at the top sheet and second ring segments are located outside of the impermeable area at the top sheet, the first and second ring segments of the annular top sheet part together forming the annular top sheet part while the annular top sheet part extends along the sealing seam and provides at least a part of the sealing seam. 37. The pad according to claim 36, wherein one segment of the first ring segments of the annular top sheet part borders, on both sides, on segments of the second ring segments of the annular top sheet part. 38. The pad according to claim 36, wherein the annular top sheet part covers the entire sealing seam. 39. The pad according to claim 36, wherein the annular top sheet part is part of the sealing seam. 40. The pad according to claim 36, wherein the annular top sheet part extends out from the sealing seam across a portion of the top sheet. 41. The pad according to claim 27, wherein the plurality of sub-areas separate from each other each extend partly along an inside of and partly outside the sealing seam. 42. The pad according to claim 27, wherein the plurality of sub-areas separate from each other each extend along an inside of the sealing seam. 43. The pad according to claim 27, wherein the plurality of sub-areas separated from each other each extend outside the sealing seam. 44. The pad according to claim 27, wherein the plurality of sub-areas extend at the bottom sheet of the covering. 45. The pad according to claim 27, wherein the impermeable area of the covering at the bottom sheet comprises a coating which is at least substantially impermeable to water. 46. The pad according to claim 27, wherein the impermeable area of the covering at the bottom sheet comprises an additional film which is applied to the filtering paper at, at least one of the inside and the outside of the pad and which additional film is at least substantially impermeable to water. 47. The pad according to claim 27, wherein the bottom sheet is manufactured from a material that is at least substantially impermeable to water, which is perforated for obtaining a filter. 48. The pad according to claim 27, wherein the impermeable area of the covering at the top sheet comprises a coating which is at least substantially impermeable to water. 49. The pad according to claim 27, wherein the impermeable area of the covering at the top sheet comprises an additional film which is applied to the filtering paper at, at least one of the inside and the outside of the pad and which is at least substantially impermeable to water. 50. The pad according to claim 27, wherein the top sheet is manufactured from a material that is at least substantially impermeable to water, which is perforated for obtaining a filter. 51. The pad according to claim 27, wherein the bottom sheet is arranged to be at least substantially cup-shaped. 52. The pad according to claim 51, wherein the pad is substantially symmetrical across a flat plane extending through the sealing seam. 53. The pad according to claim 27, wherein the top sheet is arranged to be at least substantially flat. 54. The pad according to claim 27, wherein the covering is arranged to be flexible. 55. The pad according to claim 27, wherein the pad is arranged to be flexible. 56. The pad according to claim 27, wherein the top sheet outside the sealing seam rests, at least substantially, on the at least one product. 57. The pad according to claim 27, being arranged for placement in the given holder that has at least one projection in addition to the at least one pressure limit opening therein, and the pad further being provided with at least one of a fixing opening and an indentation for accommodating the projection and for accurately positioning the pad in respect of the at least one pressure limit opening of the given holder. 58. The pad according to claim 9, wherein each of the elongate first strip-shaped bottom sheet sub-area and the elongate second strip-shaped bottom sheet sub-area are positioned only on a surface of the bottom sheet.