To certainly prevent the melting of the upper layer of a laminated resin film at the time of high speed passage by bonding a resin film to the surface of a metal panel under heating and pressure while adjusting the contact length of the resin film with a pressure bonding roll on the inlet side of the pressure bonding roll as temp. control.
A pressure contact roll 5 is pressed to a pressure bonding roll 2 from the upper surface of a clear resin film 3 and moved in the body peripheral direction of the pressure bonding roll 2 to adjust the contact length A of the clear resin film 3 with the pressure bonding roll 2. When the contact length A is made large, the clear resin film 3 can be preliminarily cooled before the film 3 is bonded to the heated metal strip 1 by the pressure bonding roll 2. Therefore, the cooling time of the laminated clear resin film 3 at the pressure bonding part 6 to the metal strip 1 by pressure bonding rolls 2, 2a at a time of high speed passage becomes short and the melting of the clear resin film 3 up to the upper layer by the sensible heat of the metal strip 1 during a period not sufficiently cooled by the pressure roll 2 and moving from the outlet side of the pressure bonding rolls 2, 2a to cooling water 4 is certainly prevented.
NISHIZAWA KOICHI
ITO TSUYOSHI
SUZUKI HIROYUKI
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