DEVICE FOR FORMING PERFORATION

摘要

PROBLEM TO BE SOLVED: To provide a device for forming perforation which can easily and surely form the precise and minute perforation and which can prevent the occurrence of breakage such as sear of a sheet during processing.

SOLUTION: The device for forming the perforation is constituted as follows. It is provided with a transfer means to transfer the sheet made of paper and plastics or the like in a fixed direction and a laser processing means to form the perforation by irradiating a laser beam to the surface of the sheet to be transferred by the transfer means. The transfer means has at least two conveying rollers which support the rear face of the sheet at the vicinal position across a laser beam irradiating part. At least the two conveying rollers and the space between the rollers are surrounded by a housing on the rear face side of the sheet. The housing is provided with an exhaust means to discharge a gas in the space to the outside.

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