| 摘要 |
In this invention manually operated Letter Sheet Folder provides custom folding of paper sheets to the size of regular mail envelope (like for envelope 4.25" x 9.25" or any other dimension), and at the same time it provides function of sheet pocket and/or file folder which is easy to use in offices and homes. This Letter Sheet Folder is made from cardboard//paper//plastic or any combination of those materials. In a technology of folding of letter sheets it is known to provide automatic folding of paper sheets in order to fold relatively small amount of regular size envelopes by the use of automated equipment like it was claimed in the patent USA No.5,090,672. Manual folding by hand is still a time consuming and effort demanded process. The most uncomfortable operation is to fold letter- sheets into a "C"//"Z"//"G"//"W" letter fold without the use of a special device.
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