Arrangement of threading in a calender
First Claim
1. A multi-roll calender comprising an apparatus for threading a paper web (W), which calender comprises an upper roll (12), a lower roll (13), and at least one intermediate roll (14 . . . 23) fitted between the upper Toll (12) and the lower roll (13), which rolls have been arranged in the frame of the calender as a substantially vertical stack of rolls, in which connection the rolls (12 . . . 23) placed one above the other are in nip contact (N1 . . . N11) with one another, and which calender further comprises take-out leading rolls (101 . . . 110) fitted at the sides of the stack of rolls at each intermediate roll (14 . . . 23) alternatingly at the left side and at the right side, which take-out leading rolls have been attached to the support constructions of the intermediate rolls (14 . . . 23) concerned, which apparatus for threading comprises at least one loop of a transfer belt (Z,Z1,Z2,Z10,Z11,Z12) which is penetrable by air and at least one suction member (201 . . . 205;
-
210 . . . 219;
30101;
302,303) which is placed on the free run of the at least one transfer belt at the opposite side of the at least one transfer belt in relation to a lead-in strip (W1), which is kept in contact with the at least one transfer belt by means of the vacuum present in the at least one suction member, wherein the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) is guided by belt pulleys (12′
. . . 23′
;
101′
. . . 110′
) mounted on the axles of rolls (12 . . . 23) in the stack of rolls and on the axles of take-out leading rolls (101 . . . 110) or on narrower portions provided at the end of said rolls, the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) running outside the edge of the web (W) through at least two passages formed between belt pulleys (12′
. . . 23′
) of consecutive rolls (12 . . . 23) in the stack of rolls, and the lead-in strip (W1) being passed on the support of the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) through at least one passage formed between belt pulleys (12′
. . . 23′
) of consecutive rolls (12 . . . 23) in the stack of rolls and that the at least one suction member (201 . . . 205;
210 . . . 219;
301;
302,303) is placed on a free run of the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) between a belt pulley (12′
. . . 23′
) of a roll (12 . . . 23) in the stack of rolls and a belt pulley (101′
. . . 110′
) of a take-out leading roll (101 . . . 110).
1 Assignment
0 Petitions
Accused Products
Abstract
The invention concerns an arrangement of threading of a paper web (W) in a supercalender, which comprises an upper roll (12), a lower roll (13), and a stack of rolls consisting of intermediate rolls (14 . . . 23) and fitted between said upper and lower roll. The rolls (12 . . . 23) in the calender arm in nip contact (N1 . . . N11) with one another. At the sides of the stack of rolls, alternatingly at the left side and at the right side, a take-out leading roll (101 . . . 110) has been fitted at each intermediate roll (14 . . . 23). The arrangement of threading comprises at least one loop of a transfer belt (Z), which is penetrable by air and which runs outside the edge of the paper web (W) through at least two nips (N1 . . . N11) in the calender. The transfer belt (Z) passes the lead-in strip (W1) of the paper web through at least one nip (N1 . . . N11) in the calender. In addition to this, the arrangement of threading comprises at least one suction box (201 . . . 205; 210 . . . 219), which is placed on a free run of the paper web (W) and of the transfer belt (Z) between intermediate rolls (14 . . . 23) and takeout leading rolls (101 . . . 110) in the calender. The lead-in strip is kept in contact with the transfer belt by means of the suction of a suction box.
10 Citations
15 Claims
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1. A multi-roll calender comprising an apparatus for threading a paper web (W), which calender comprises an upper roll (12), a lower roll (13), and at least one intermediate roll (14 . . . 23) fitted between the upper Toll (12) and the lower roll (13), which rolls have been arranged in the frame of the calender as a substantially vertical stack of rolls, in which connection the rolls (12 . . . 23) placed one above the other are in nip contact (N1 . . . N11) with one another, and which calender further comprises take-out leading rolls (101 . . . 110) fitted at the sides of the stack of rolls at each intermediate roll (14 . . . 23) alternatingly at the left side and at the right side, which take-out leading rolls have been attached to the support constructions of the intermediate rolls (14 . . . 23) concerned, which apparatus for threading comprises at least one loop of a transfer belt (Z,Z1,Z2,Z10,Z11,Z12) which is penetrable by air and at least one suction member (201 . . . 205;
-
210 . . . 219;
30101;
302,303) which is placed on the free run of the at least one transfer belt at the opposite side of the at least one transfer belt in relation to a lead-in strip (W1), which is kept in contact with the at least one transfer belt by means of the vacuum present in the at least one suction member, wherein the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) is guided by belt pulleys (12′
. . . 23′
;
101′
. . . 110′
) mounted on the axles of rolls (12 . . . 23) in the stack of rolls and on the axles of take-out leading rolls (101 . . . 110) or on narrower portions provided at the end of said rolls, the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) running outside the edge of the web (W) through at least two passages formed between belt pulleys (12′
. . . 23′
) of consecutive rolls (12 . . . 23) in the stack of rolls, and the lead-in strip (W1) being passed on the support of the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) through at least one passage formed between belt pulleys (12′
. . . 23′
) of consecutive rolls (12 . . . 23) in the stack of rolls and that the at least one suction member (201 . . . 205;
210 . . . 219;
301;
302,303) is placed on a free run of the at least one transfer belt (Z,Z1,Z2,Z10,Z11,Z12) between a belt pulley (12′
. . . 23′
) of a roll (12 . . . 23) in the stack of rolls and a belt pulley (101′
. . . 110′
) of a take-out leading roll (101 . . . 110). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
210 . . . 219;
Specification