| 摘要 |
PROBLEM TO BE SOLVED: To provide a new double postal card, with which an information content larger than before can be transmitted to an addressee. SOLUTION: A paper 1, the longitudinal size x of which is equal to the standard longitudinal size of the postal card and, at the same time, the lateral size y of which is four times as long as the standard lateral side of the postal card, is folded in zigzags by three folds 6, 7 and 8, which are alternately formed in ridge- and valley-folds so as to sidewise quadrisect the paper. In postal card- sized paper super posed part divided into a left and a right parts by the enter fold 7, respective sides except the folds 6 and 8 are pasted together so as to be bound into bags, resulting in employing one paper super posed part as a sending postal card and the other paper super posed part as a reply postal card having address columns 2 and 3 provided respectively.
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