| 摘要 |
<p>The invention relates to two perforated lines running parallel on an envelope with a strip of material in most instances glued, fixed or welded to the underside for reinforcement between the two perforated lines with a tab at each end to aid in the EASY OPEN of envelopes of all types and sizes and including the large commercial systems. The EASY OPEN system is activated by lifting the tab and tearing the reinforced strip at 90 degrees along the perforated lines (the system is designed so that the tear strip can be activated from either end) which in turn removes a portion of the envelope (window) for the easy retrieval of the contents.</p> |
