| 摘要 |
Production of a closed envelope (2) made from flat material, especially paper, which can be separated into two parts (6, 8) comprises feeding a single flat material strip into a first machine direction, forming separating cuts in the flat material strip along the machine direction forming a main strip and a covering strip, forming a predetermined breaking line in the main strip and covering strip, depositing an insertion strip on the main strip, gluing the insertion strip to the main strip, forming separating cuts, weakening lines or predetermined breaking lines in the insertion strip, gluing the covering strip to the main strip and forming separating cuts across the machine direction. Preferred Features: The insertion strip is glued to the main strip on a front and a rear section in the machine direction in relation to the envelope being produced. |
