| 摘要 |
A method of and apparatus for changing the pattern impressed in or on a web of material passing through the nip of opposing calender rolls is disclosed. A plurality of calender rolls are provided with a pattern of lands and grooves. While a web of material is passed through the nip or nips formed at least in part by each patterned roll, the relative register between the patterned rolls is maintained so that the pattern created by the overlap of each pattern impressed on the web continues in an unchanging fashion throughout the length of the web thus processed. By altering the relative register of the patterned rolls, and then maintaining the rolls in the new register, a distinctive composite pattern is impressed in or on the web without otherwise altering the patterned calender rolls. |
