| 摘要 |
A filter-bag (1) for medicinal or aromatic infusions is provided with an exterior pocket (9) adapted to receive a tea or coffee spoon, thus permitting to maintain the filter-bag in the bottom of a cup (cf. figs. 2, 3 and 4). A method for manufacturing a filter-bag according to the invention comprises sandwiching between two continuously traveling filterpaper webs heaps of plant-based product placed onto one of said webs, and partially welding an exterior paper web of reduced width onto one of said filterpaper webs, in welding said filter-bags shut and cutting them to smaller units. Apparatus for manufacturing a filter-bag according to the invention substantially comprises two main spools (37,38) continuously feeding two filterpaper webs (43,55), a metering device (47,46,44,45) for dispensing plant-based product, an additional spool (56) continuously feeding a paper web (57) of smaller width than said first or second paper webs and being attached onto one of the latter, a welding device (49,50) and a cutting device (59,60,61,62,63, 64) (cf. figs. 9, 10, 11). |
