| 摘要 |
PROBLEM TO BE SOLVED: To provide an easy-to-open envelope, which is easily opened without using scissors or the like when it is received and prevents a letter in it from being torn accidentally. SOLUTION: Both sides of the part to be opened are perforated (1) in the envelope (4) so that the envelope received (4) is easily opened. The side close to the perforation (1) end is reinforced by plastic, plate, metal fitting, or the like (2). Furthermore, the reinforced part in the envelope (4) is entirely pasted (3). COPYRIGHT: (C)2011,JPO&INPIT
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