Characteristics of Reserve Box

The author has discovered a new practical formula on the compressive properties of fibre assemblies with the aid of van Wyk's theory and Wakayama's published work, and has attempted to clarify by this formula the properties of fiber assemblies in a reserve box. By applying this formula to the mechanical properties of fiber assemblies in a reserve box, he has derived a practical formula on the relation between apparent density γ(g/cm3) of fibre assemlies at the bottom of the reserve box and their height h(cm). The formula on the density-height relation has been compared with an experimental formula obtained from the results of experiments in which a reserve box was used. Two formulas presented themselves when cotton fiber assemblies were piled in a brass reserve box. (1) Practical formula: γ=0.002/μ(1-e-0.11•μ•h) where μ=0.103(2.86×10-8h3-1.63×10-5h2+3.78×10-3h-5.72×10-2)-0.443 (2) Experimental formula: γ_??_2×10-2(2.86×10-8h3-1.63×10-5h2+3.78×10-3h-5.72×10-2)1/2 μ was the apparent coefficient of friction between fiber assemblies and the walls of the reserve box.