| 摘要 |
1533521 Filter bag TEAFILTER INTERNATIONAL AS 20 Jan 1977 [26 Jan 1976] 02289/77 Heading A4E [Also in Divisions B 1 and B8] A filter bag for making tea or coffee has a closed bottom 8 side seams 5, 6, and an open top 7, the side seams increasing in width towards the bottom. As shown, the bag is formed from two superimposed blanks 2, 3 of a non-woven filter paper and the closed bottom is provided by a bottom seam 4 so that, in plan, the bag interior is rectangular. In embodiments the bag interior tapers, Fig. 2, (not shown) and the bag exterior may be rectangular, Fig. 3 (not shown). Alternatively, Fig. 4 (not shown) the bag interior has a curved outline. |
