| 摘要 |
<p>The envelope (1), for the bulk dispatch of documents etc., is a sheet of non-transparent paper material with or without reinforcement fibers. The front section (2) has two side tabs (3,4), a flap closure and a bottom flap, to be folded into the envelope. At least one side edge of the closure flap (5) has a security tab (6), with an adhesive bond to the outer side of the envelope front section after folding. The security tab has a rectangular shape, with rounded corners, and covers at least part of the closure flap height.</p> |
