(19)
(11) EP 0 346 046 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.02.1990 Bulletin 1990/09

(43) Date of publication A2:
13.12.1989 Bulletin 1989/50

(21) Application number: 89305651.5

(22) Date of filing: 05.06.1989
(51) International Patent Classification (IPC)4: B41F 23/04, F26B 13/18, F28D 11/02
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 07.06.1988 US 203075

(71) Applicant: W.R. Grace & Co.-Conn.
New York, New York 10036 (US)

(72) Inventor:
  • Moran, Kenneth J.
    Appleton Wisconsin 54914 (US)

(74) Representative: Barlow, Roy James et al
J.A. KEMP & CO. 14, South Square Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)


(56) References cited: : 
   
       


    (54) Chill roll


    (57) A chill roll for cooling a web, such as in the printing industry, where a uniform temperature across the chill roll is maintained. Journals support an outer roll assembly and an inner roll assembly. The inner roll assembly is bearing mounted on the inner ends of opposing journals and the outer roll is rotated about the inner roll, which is weighted to free-wheel about the bearings to minimize rotary motion. Coolant is introduced through the journal on one end and into a center tube, where the coolant uniformly flows in an annular space between the rolls and along the length of the inner and outer roll assemblies to circumferentially traverse between the rotating and stationary outer and inner rolls. This coolant flow provides enhanced heat transfer from the outer rotating chill roll to the circulating coolant. Heated coolant collects and returns through a center tube, and exhausts through the center tube and out through the journal. Turbulence inducer bars between the inner and outer roll assemblies creates a turbulence in the coolant flow between the outer and inner rolls to further enhance heat transfer.







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