| 摘要 |
PROBLEM TO BE SOLVED: To provide a single piece envelope for a printer which is suitable as a bag for work (a medicine bag) used in a hospital and a drug store or the like in which a supplying of the envelope to the printer can be carried out smoothly and a difference between an inner circumference and an outer circumference does not produce any wrinkle at all. SOLUTION: A rectangular paper sheet S is folded into two segments in reference to a folding-back line 11 for dividing the sheet S into two segments. A single piece envelope is constituted by setting a glue through adhesive agents at both sides. Then, a bottom part of the envelope, in particular, is made thin in its thickness by pressing rollers, thereby a paper thickness at a normal section is set to 120 to 170μm and a paper thickness at the bottom part of the envelope is set to 0 to -10μm in respect to the paper thickness at the normal section. A hardness in compliance with the paper thickness of the paper material sheet S is set to a paper value, thereby a resistance against claws when the sheet is supplied from a paper feeding device to a printer is set to a proper value so as to perform a smooth feeding operation.
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