SEALED LETTER PREPARATION DEVICE AND ENVELOPE PAPER
In a sealed letter producing device which folds and seals, with a content, an envelope sheet on which pressure-sensitive adhesives are provided, sealing with pressure rollers smaller than in conventional rollers is achieved. Pressure-sensitive adhesives 106 are provided in both edge portions in the...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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