초록 ▼

A method for corrugating a metal foil (11), which together with a longitudinally flat foil (12) is intended to form a foil package pervious to liquid or gas, where the folds are made with a very small fold radius by rolling in at least two steps between rollers (42, 43) disposed in pairs, the fold r

A method for corrugating a metal foil (11), which together with a longitudinally flat foil (12) is intended to form a foil package pervious to liquid or gas, where the folds are made with a very small fold radius by rolling in at least two steps between rollers (42, 43) disposed in pairs, the fold radius (51) being large and the fold height (52) low in a first step, and after the final step, the fold radius (53) is less than 10%, preferably 2 to 5% of the fold distance (55), and the fold height (54) is greater than after the first step.

대표청구항 ▼

1. A method for corrugating a metal foil, by rolling an originally flat metal foil in at least two steps between fluted rollers disposed in pairs, the method comprising:a first step of rolling the metal foil between fluted rollers having a radius at their top, which accounts for 10% or more of the d

1. A method for corrugating a metal foil, by rolling an originally flat metal foil in at least two steps between fluted rollers disposed in pairs, the method comprising:a first step of rolling the metal foil between fluted rollers having a radius at their top, which accounts for 10% or more of the distance between the groove tops, and a final step of rolling the metal foil between fluted rollers having a radius at their top which is smaller than the radius in the first step.