| 摘要 |
<p>The paper filter for the insertion in the infusion funnel of coffee makers, is of simplified form, comprising twin trapezoidal pieces which are crimped together by their non-parallel and short edges. The infusion funnel has a groove, which locates on a funnel dia., traverses the walls, and base of the funnel, and serves to locate the crimped edges of the filter. Once inserted the filter is opened out to line the funnel walls. The funnel is of truncated concial form, and the filter is inserted with the smaller of the two parallel edges leading.</p> |
