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when people want to use paper rolls, they put it in a vertical bar to be stable. but many people dont have paper roll stands or dont put it in the stands. also the paper rolls trundle on the table or cant be hold tight in peoples hand. in such situations the paper roll falls down on the ground and will be unrolled. the problem is that the paper will be unusefull and difficult to be gathered . in such redesigning for roll papers , shape of the base is changed from circle therefore more they will be gathered more easily and less papers will be wasted.
Islamic Azad University
Central Tehran Branch