Calender roll for supercalender
AssigneeFuji Photo Film Co., Ltd.
InventorsNobuo Tsuji, Masaaki Fujiyama, Hiromi Nakahara, Eiichi Tadokoro, Keiji Tanaka, Isao Yamamoto
Life of this patent
Estimating the term…
Abstract
In a supercalender consisting of a metal roll and an elastic roll and smoothing a web by nipping the web between the metal roll and the elastic roll, the elastic roll satisfies the condition of: Hs(D).gtoreq.-0.1T+85 under the condition of 50 to 500 kg/cm of the linear pressure between the metal roll and the elastic roll, where Hs(D) is Shore hardness D-scale of the elastic roll and T is the working temperature (.degree.C.) of the elastic roller that satisfies the condition of 60.gtoreq.T.gtoreq.120.
Claims8
In a supercalendar comprising a metal roll and an elastic roll for smoothing the surface of a web by nipping the web between the metal roll and the elastic roll, the improvement which comprises, said elastic roll formed from a material satisfying the conditions of
- Hs(D).gtoreq.-0.1 T+85
- at a linear pressure between the rolls of 50 to 500 Kg/cm, where Hs(D) is Shore hardness D-scale of the surface of the elastic roll, and T is the working temperature (.degree.C.) of the elastic roll varying within the range of 60.ltoreq.T.ltoreq.120.
Dependencies are inferred from the claim text.