| 摘要 |
PURPOSE:To facilitate putting in and out of a filter body, make the filter body hardly removable when mounted by providing the peripheral edge of an aperture with retaining pieces, improve the degree of contact between the siphon type coffee maker and the filter body and enable the stable placement of the filter body by flattening the rear surface of the filter body. CONSTITUTION:Non-woven fabrics 3 formed to a shape corresponding to the flat shape of the filter body 2 of the siphon type coffee maker are superposed on each other and the peripheral edges thereof are fused 6. The aperture 5 provided with at least >=1 retaining pieces 4 projecting in the central direction of the rear surface non-woven fabric 3 at its peripheral edge is formed at the rear surface non-woven fabric 3. |
