| 摘要 |
1. A calender assembly comprising a plurality of rollers in a vertical stack forming nips between neighbouring rollers and a control system to open and close the nips, characterized in that the rollers (3-8) are set so that at least two opened nips (11-13) are between two closed nips (10, 14). 2. The calender of Claim 1, characterized in that the closed nips (10, 14) are formed by two outer pairs of rollers (3, 4; 7, 8). 3. The calender of Claim 2, characterized in that the outermost rollers (3, 8) are bend adjustment rollers. 4. The calender of Claims 1-3, characterized in that at least one of the rollers in the outer pairs (3, 4; 7,8), flanking each closed nip (10, 14), is powered. 5. The calender of Claim 4, characterized in that all the rollers (3-8) have their own drives (29-34), while separate control is provided for at least the drives (31, 32) to the rollers (5, 6) flanking the opened nips (11-13). 6. The calender of Claims 1-5, characterized in that at one closed nip (10) one of the rollers (3, 4) for it is fixed to the columns. 7. The calender of Claim 6, characterized in that the fixed roller (3) is the topmost in the assembly while the lowermost roller (8) is provided with a drive (20) for lifting. 8. The calender of Claims 1-7, characterized in that at least in one of closed nip (10, 14) one roller (4, 7) is so constructed as to enable blocking, while the other is provided with a pressing device (20, 27). 9. The calender of Claim 8, characterized in that the pressing device (27) acts on one end of a double-arm lever (15), while another roller is mounted on the other end of the double-arm lever (4). 10. The calender of Claim 8 or 9, characterized in that another roller (3') is constructed with a lifting cover. 11. The calender of Claims 1-10, characterized in that both closed nips (10, 14) are soft. 12. The calender of Claims 1-11, characterized in that one of the opened nips (12) is constructed as an inverting gap. |
