| 摘要 |
PURPOSE:To provide a percolating bag of simple structure by providing a percolating part which contains a material for the extraction and is placed inside and attached to a package and by having the two sheets constituting the package separated from each other at the upper ends and attached to each other a little below the upper ends by the use of an adhesive which is thermoplastic and softens to fusion under heat. CONSTITUTION:Inside a rectangular package 11 consisting of, for example, sheets of synthetic resin impervious to water and air a percolating sheet 12 consisting of a nonwoven fabric is provided transversely inside the package 11. A material for the extraction 13, such as roast, ground coffee beans, is contained in the percolating sheet 12. The two sheets 14, 15 which constitute the package 11 are separated from each other at the upper ends 14a, 15a and attached to each other at an adhering part 16, which is a little below the upper ends, by the use of an adhesive which is thermoplastic and softens to fusion under heat. A discharging part 17 in the lower part of the package 11 is sealed by an adhesive which is also thermoplastic and comes off when put in contact with hot water. |
