| 摘要 |
1,004,447. Packaging. TETRA A.B. June 10, 1964 [July 1, 1963], No. 24064/64. Heading B8C. [Also in Divisions B5 and D1] A web of paper 1 to be provided with a waterproof cut edge 4 is impregnated with paraffin wax 8 as a melt, solution or suspension from its upper surface in a band 3 about the line along which it is to be cut and reduced pressure is applied to its lower surface by means of a suction box 7. A laminate to be used for packaging liquids is formed by coating the impregnated web on one or both sides with a layer of heat sealable plastic before or after cutting. |
