Presses – Concurrent pressing and conveying – Roll type
Patent
1992-12-15
1993-08-24
Gerrity, Stephen F.
Presses
Concurrent pressing and conveying
Roll type
100161, B30B 304, D21G 100
Patent
active
052379159
ABSTRACT:
A calender stack having a plurality of hard and soft calender rolls for use in calendering a coated or uncoated paper web which comprises employing a plurality of soft rolls exhibiting at least two distinct levels of hardness and arranging the rolls in a calender such that the level of hardness is progressively harder in the direction of travel of the coated paper web.
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"The Effect of Supercalender Roll Fillings on Paper Printability", Ronald D. Agronin, Tappi, vol. 61, No. 9 (1978).
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"Supercalender Variables Affecting Paper Quality", Michael Agronin, TAPPI, vol. 66, No. 10 (1983).
"Hard-Nip and Soft-Nip Calendering of Uncoated Groundwood Papers", R. H. Crotogino and M. F. Gratton, Pulp and Paper Institute of Canada (1987).
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On-Machine Soft Calendering: A Good Idea Whose Time Has Come?, Les Y. Ishinose, Dec., 1984.
Gerrity Stephen F.
The Mead Corporation
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