EP0361402A1
Expired / Lapsed
EP
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Calendering apparatus for paper making process
Assignee: Jujo Paper Co Ltd
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Filing: 1989-09-26
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Granted: —
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Expires: 2009-09-26
Abstract
Abstract A calendering apparatus in which a nip portion is formed by a chilled roll (1, 21), a backing roll (2, 22) and an endless elastic belt (3, 23) arranged over the chilled roll and the backing roll, wherein a paper sheet (10) to be treated passes between the chilled roll and the endless elastic belt, and thus a paper sheet having a remarkably improved smoothness and gloss can be obtained by the calendering apparatus of the present invention using an endless elastic belt having a relatively long length, without the disadvantage of a heat build-up occurring in a usual calendering treatment.
Inventors
- 👤 Tsuyoshi C/O Jujo Paper Co. Ltd. Abe
- 👤 Jun C/O Jujo Paper Co. Ltd. Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:08
CPC Classifications
D; D21; D21G; D21G1/00; D21G1/0066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A calendering apparatus for a paper making process including at least a nip (N) constituted by two rolls (1, 21; 2, 2a, 2b, 22), characterized in that said two rolls (1, 21; 2, 2a, 2b, 22) comprise a chilled roll (1, 21) and backing roll (2, 2a, 2b, 22), and an endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b) having a longer length than a circumferential length of the backing roll (2, 2a, 2b, 22) is arranged over a nip portion (N) of the backing roll (2, 2a, 2b, 22) so that the endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b) can be moved by a rotation of the backing roll (2, 2a, 2b, 22) and nips a paper sheet (10) against the chilled roll (1, 21) at a nip portion (N) thereof.
Claim 2
Dependent Claim
137 words
A calendering apparatus for a paper making process including at least a nip (N) constituted by two rolls (1, 21; 2, 2a, 2b, 22), characterized in that said two rolls (1, 21; 2, 2a, 2b, 22) comprise a chilled roll (1, 21) and backing roll (2, 2a, 2b, 22), and an endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b) having a longer length than a circumferential length of the backing roll (2, 2a, 2b, 22) is arranged over a nip portion (N) of the backing roll (2, 2a, 2b, 22) so that the endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b) can be moved by a rotation of the backing roll (2, 2a, 2b, 22) and nips a paper sheet (10) against the chilled roll (1, 21) at a nip portion (N) thereof.
Claim 3
Dependent Claim
21 words
A calendering apparatus according to claim 1, characterized in that said chilled roll (1, 21) includes a heating means (16, 36).
Claim 4
Dependent Claim
66 words
A calendering apparatus according to claim 1, characterized in that two nips (N) are formed by arranging two backing rolls (2, 2a, 2b, 22) and at least an endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b) against two positions of a circumferential surface of a chilled roll (1, 21), whereby a calendering treatment of a surface of the paper sheet (10) is performed twice.
Claim 5
Dependent Claim
45 words
A calendering apparatus according to claim 1, characterized in that two sets of rolls (1, 21; 2, 2a, 2b, 22) including at least a nip (N) respectively, are arranged so that a calendering treatment can be applied to both surfaces of the paper sheet (10).
Claim 6
Dependent Claim
49 words
A calendering apparatus according to claim 1, characterized in that a cooling device (6, 26) is arranged at a position near to a pathway of the endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b), to cool the endless elastic belt (3, 3a, 3b, 3c, 23, 23a, 23b).
Claim 7
Dependent Claim
19 words
A calendering apparatus according to claim 5, characterized in that the cooling device (6, 26) is an air shower.
Claim 8
Dependent Claim
20 words
A calendering apparatus according to claim 5, characterized in that the cooling device (6, 26) is a water spraying device.
References Cited (Backward Citations)
GB968938A
Cited
FR2588293A1
Cited
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