| 摘要 |
The sheet which can be secured is altogether characterised in such a way that the envelope forms a unit and a whole with the sheet of writing paper in the stuck-down condition, and on the other hand the envelope is produced from a single piece with the sheet of writing paper, the folding points of the envelope, the DIN-compatible folding points of the sheet of writing paper and the adhesive strip being marked. The length of the sheet of writing paper is almost unlimited. The sheet of writing paper can be separated from the roll in the length which is desired in each case, the letter sheet with the envelope and the adhesive strip with their folding gradations appearing repeatedly at specific intervals.
|
