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Usually, the edges of the bags are serrated, and it’s convenient for people to tear the bag with their fingers. Basing on this we get a new idea. Process the packages’ (such as plastic snack bags, ketchup packets and even paper envelope) manufacturing material into thin strips, and then attach them to the both sides of bags to reinforce. The point is to make the strips parallel and the horizontal distance between each strip is 0.5 mm. In this way, people can tear along the clearance between any reinforcements. And we get a tidy cutout, which is similar to the effect of the scissors to cut along a straight line.
XI`AN UNIVERSITY OF SCIENCE AND TEC
XI`AN UNIVERSITY OF SCIENCE AND TECHNOLOGY