摘要 |
<p>The envelope has two leaflets (1, 2), where one leaflet is larger than the other to form a strip (7) with two parallel folding lines (6d, 6`d). The lines provide for a gusset zone and an end zone with an adhesive portion. Each of the two ends of the gusset zone of the leaflet (1) has a cut such that the lines assure formation of a gusset, and cuts facilitate connection of the corners of the envelope during and after filling. An INDEPENDENT CALIM is also included for a process of continuous fabrication of expandable envelopes.</p> |