Calender with pivotally displaceable roll

A calender in a paper or board machine, comprising:

• a calender frame,
• at least first, second and third rolls,
• first and second bearing means supporting the first and second rolls respectively relative to the calender frame in spaced apart relationship,
• roll support means connected to the calender frame for pivotal movement relative to the calender frame about a pivot axis transverse to the machine direction, said roll support means supporting the third roll so that by pivotal movement of the roll support means the third roll can be displaced between a first position in which it forms calendering nips with the first and second rolls respectively and a second position in which it is spaced from the first and second rolls, whereby a web can be threaded by shifting the third roll to its second position, passing the web between the third roll and the first and second rolls, and shifting the third roll back to its first position so that the web is brought into the nips between the third roll and the first and second rolls, and
• a takeoff roll mounted on the roll support means.

Calender apparatus in a paper or board machine, said calender apparatus comprising:

• a calender frame structure,
• at least first, second, third, fourth, fifth and sixth calender rolls,
• first, second, third and fourth bearing means supporting the first, second, third and fourth rolls respectively relative to the calender frame structure in horizontally spaced apart relationship, with the second roll between the first and third rolls and the third roll between the second and fourth rolls,
• roll support means supporting the fifth roll relative to the calender frame structure in a manner that allows the fifth roll to be displaced upwards form a first position in which it forms calendering nips with the first and second rolls respectively and a second position in which it is above the first and second rolls and is spaced therefrom, and supporting the sixth roll relative to the calender frame structure in a manner that allows the sixth roll to be displaced downwards from a first position in which it forms calendering nips with the third and fourth rolls respectively and a second position in which it is below the third and fourth rolls and is spaced therefrom, whereby a web can be threaded by shifting each of the fifth and sixth rolls to its second position, passing the web between the fifth roll and the first and second rolls, passing the web between the sixth roll and the third and fourth rolls, and shifting each of the fifth and sixth rolls back to its first position so that the web is brought into the nips between the fifth roll and the first and second rolls and between the sixth roll and the third and fourth rolls.