Apparatus for laminating can body blanks

A surface-treating apparatus for can body blanks includes a means for cutting (10) an original sheet into can body blank materials having a predetermined width and capable of dividing into plural can body blanks, a conveying path (12) for conveying the can body blank materials, a material-feeding means for intermittently feeding the blank material to the conveying path, a means for heating the blank material first and second film-feeding means for respectively feeding a printed biaxially-stretched polyester film and a plain polyester film to both sides of the blank material along its conveying direction, first and second press-bonding means for respectively successively press-bonding under heat said both films to both sides of the blank material and coupling the blank materials into a continuous form while defining metal-exposed areas for welding parts at both side edges of both surfaces of the blank materials, a means for cooling the continuous sheet of the blank materials, a blank material-cutting means for cutting the continuous sheet in its width direction at the space area between adjacent print pattern on the biaxially-stretched polyester film into surface-treated blank materials, a means (7) for driving the surface-treated blank material out of the conveying path, and a means (9) for dividing the surface-treated blank material into individual can body blanks according to the print patterns.