PURPOSE: To prevent the generation of a trouble due to the stagnation of air and improve the quality of a product as well as a yielding efficiency by a method wherein a both surface adhesive tape, having a bonding force stronger than an adhesive force between a cover film and an adhesive agent, is bonded to the laminate surface of the cover film so as to discharge included air from both ends of a web along the front rim of the both surface bonding tape, thereafter, laminate is started.

CONSTITUTION: An inducing air A, produced by a laminate base 1 and a cover film 3, is generated surely at the starting section of coating of an adhesive agent. When a both-surface bonding tape 5, having a bonding strength stronger than the adhesive strength of the adhesive agent, is bonded onto a laminate surface between the adhesive agent 2 and the cover film 3 immediately after the leading edge of coating of the adhesive agent, an inducing air B, intercepted by a laminate nipple roll, is discharged out of both rims of a web along the leading rim of the both surface bonding tape to the outside of a system and, thereafter, a possibility to generate a trouble due to the stagnation of air may be eliminated.