| 摘要 |
<p>An envelope manufacturing process, the process including the steps of: streaming a first length of material; trimming side edges of the first length of material to form lateral joining tabs along lateral sides of the first length of material; folding the lateral joining tab(s) along at least one of the sides; moving a second envelope panel so that it is adjacent the first length of material; bringing the second envelope panel into engagement with the folded joining tab(s); severing a leading portion from the first length of material to form a first envelope panel having transverse joining tabs along its front and rear sides; folding at least one of the transverse joining tabs over an edge of the second envelope panel so that joining tabs are folded along at least three sides of the first envelope panel; and fixing at least one of the folded transverse tab(s) to the second envelope panel to form an envelope.</p> |
