| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To form firm folding lines at a desired position regardless of the material and the strength of stiffness of a film. <P>SOLUTION: A folding line forming device for packing films includes a fifth and sixth folding line forming rollers 81, 82 arranged face to face holding a strip film 21 in between. A sixth ridge 82a projecting to outside in an axial direction is provided on the peripheral surface in the peripheral direction of the sixth folding line forming roller, and a sixth recessed groove 82b is formed on both axial direction sides of the sixth ridge. A fifth recessed groove 81b is formed on the peripheral surface in the peripheral direction of the fifth folding line forming roller at a position facing the sixth ridge, and a fifth ridge 81a is formed at a position facing the sixth recessed groove. The strip film is held between the sixth ridge and the fifth recessed groove to form mountain-folding lines 21k on the strip film, and the strip film is held between the fifth ridge and the sixth recessed groove to form valley-folding lines 21j along the folding lines. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
