| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the weight and manufacturing costs of a knapsack of a three-way type bag as luggage, a satchel, and a business bag of students or general persons. SOLUTION: Woven fabric formed by using the recycled yarn of PET(polyethylene terephthalate) bottle is adopted in place of the conventional leather and synthetic leather for a front body 1, rear body 2, bottom gore 5, side gores 4, upper flap 3, etc., of main members of the knapsack A, considering the environment. Consequently, the weight and manufacturing costs are reduced. Further, strength is enhanced with belt members. As regards the improvement of usability, the upper flap 3, etc., are fitted with reflector plates 3a, etc., and the danger of traffic accidents during going to school or commuting of the students or general people is averted. Further, a storage compartment is formed of an approximately rectangular parallelepiped or quadrangular pyramid to prevent a shape collapse and therefore this bag is convenient for storing heavy objects, etc.</p> |
