| 摘要 |
Disclosed is a file to which pinholes are provided and fixed in order to increase the size of a fixing section and to improve the fixing strength of the height-increased fixing section. The height of the fixing section is increased by tucking a segment of the fixing section between the sheets, or by folding the sheet end of one or both of the front-side sheet or the back-side sheet towards the folder section.A plurality of intermittent pinholes are provided in the surface of the height-increased fixing section, and a pressing machine which has a plurality of intermittent indentations is used to press the pinholes.
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