Method for producing sanitary cover for beverage can

A method for manufacturing a sanitary cover for a beverage can comprising:

• a cover mounting step of covering the beverage can with a vinyl cover, which is opened at a lower end portion and enclosed in all directions except the lower end portion, from an upper end portion to a middle portion of the beverage can;
• a cover adhering step of contracting the entire vinyl cover by heating the covered vinyl cover so as to be adhered on a surface of the beverage can;
• and
• a three-dimensional cutting line forming step of forming a first cutting line perforated at predetermined intervals along a boundary point between a lid cover and a periphery cover of the vinyl cover, which cover an upper surface of the beverage can, and a second cutting line perforated at predetermined intervals along a peripheral surface of the periphery cover, which surrounds a peripheral surface of the beverage can, by a cutting line forming part while the beverage can and the vinyl cover move and pass through the cutting line forming part,
• wherein in the cutting line forming step, the second cutting line is formed in a circle along the peripheral surface of the beverage can from one side of the peripheral surface of the periphery cover but is formed only near to the cutting line forming part, and the first cutting line is formed in a circle along the boundary point between the periphery cover and the lid cover but is formed only to an opposite point of a start point of the first cutting line,
• wherein the cutting line forming part comprises:
• a support plate, which is a plate having a front-and-rear length and has a curved portion formed on an inner surface to have a same shape as a vertical edge line of one side of the beverage can;
• and
• a perforating part formed on the inner surface of the support plate along a virtual route where the first cutting line and the second cutting line, which will be formed on the vinyl cover, are deployed on a plane,
• wherein one side edge of the beverage can comes into contact with the inner surface of the support plate, the beverage can rotates in the state where a side edge of the beverage can gets in contact with a curved part, and the perforating part perforates the surfaces of the periphery cover and the lid cover so that holes are formed along formation routes of the first cutting line and the second cutting line at predetermined intervals.