| 摘要 |
<p>The envelope folder (1) has first cover portion (2) and a second cover portion (4) which forms an envelope. The variable width (B) is set at back portion (3) formed between cover portions. The cover portions have a slip (5) to compensate for changes in size of the cover portions due to changes in the width on the cover portion along displacement path (7), so that the effective size of the envelope is variable. A fixing element (6) is arranged between the cover portions and slip, so that slip is fixed in any position relative to the cover portions on the displacement path.</p> |
