| 摘要 |
<p>A tamper-evident envelope has a first layer (12) of paper-containing material and a second layer (14) of paper-containing material attached to each other along a number of seams. Each seam (16, 18, 20) includes a pattern embossed and/or perforated through both layers along a major part of the seam. If the envelope is opened and resealed along one of these seams, the embossed or perforated pattern is corrupted, thereby making the unauthorized opening of the envelope readily apparent to an intended recipient.</p> |
