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In order to keep contents safe, envelops are sealed at all four sides; but that creates a problem that we will need some kind of tools to open. Tearing the envelop apart is not a very good option since the contents may be damaged.
V-envelop adds a notch to make tearing open envelop easy and along a clean, straight line. The notch itself shows the direction to tear open.
Ming Chi University of Technology
Taipei City, Taoyuan County, Taiwan
Bade City, Taoyuan County, Taiwan