| 摘要 |
<p>The present invention relates to the production of a strip (1) of imbricated bags affixed on the adhesive faces (5) of a pair of tapes (2) arranged spaced apart and side-by-side. In particular, at either or both ends of the strips (1) each tape (2) extends beyond the last bag with a leader (10) which is substantially without exposed, tacky adhesive. A variety of ways of forming the leader (10) are disclosed, including folding a length of tape (2), preferably longitudinally, with the adhesive face (5) innermost and affixed to itself. Preferably the tape is folded by relatively driving the tape (2) into a V-shaped groove (21) in a block (20), and further into a slot (22) from which the tape (2) emerges folded. Nip rollers (23) may be provided immediately downstream of the slots (22) to press the folded tape (2) together. The leaders (10) make it easier to arrange the strip of bags (3) on a machine for packaging items into the bags (3), particularly when leaders (10) are arranged at both ends of the strips (1) so that the leaders (10) of successive strips may be attached together to enable one strip (1) to be led through the machine by the preceding strip.</p> |
