Patent ID: 6816691
Filing Date: 2004-11-09
Classification: G03G

Abstract:
An endless belt comprising an endless body having opposite side edges and an interior surface, and a pair of spaced apart parallel guides bonded through adhesive layers to the interior surface of said endless body at positions adjacent to said side edges thereof and extending longitudinally along said side edges, wherein each of said guides is made of an elastic material and has an inside surface which constitutes an interface between said guide and said adhesive layer and which provides I(S) of 0.5-13.0, wherein I(S) is a total energy of a variation in a power spectrum of a sectional curve, and is given by the following equations: I&af;(S)=(1N)&it;&Sum;n=0N-1&it;{S&af;(nN&CenterDot;Î”&it;â€ƒ&it;t)}wherein&it;â€ƒ&it;the&it;â€ƒ&it;power&it;â€ƒ&it;spectrum&it;â€ƒ&it;isS&af;(nN&CenterDot;Î”&it;â€ƒ&it;t)=1N&CenterDot;&LeftBracketingBar;X&af;(nN&CenterDot;Î”&it;â€ƒ&it;t)&RightBracketingBar;2wherein&it;â€ƒ&it;the&it;â€ƒ&it;Fourier&it;â€ƒ&it;transformation&it;â€ƒ&it;is&it;â€ƒ&it;represented&it;â€ƒ&it;byX&af;(nN&CenterDot;Î”&it;â€ƒ&it;t)=&Sum;m=0N-1&it;x&af;(m&CenterDot;Î”&it;â€ƒ&it;t)&it;exp&af;(-&ii;2&it;â€ƒ&it;Ï€&CenterDot;nN&CenterDot;Î”&it;â€ƒ&it;t&CenterDot;m&CenterDot;Î”&it;â€ƒ&it;t)whereinN is a number of samples obtained from a sectional curve of the inside surface of said guide and is 2p where p is an integer, &Dgr;t is a sampling interval, in &mgr;m, at which the N-number of the samples are sampled, said sectional curve being obtained by measuring a profile of the inside surface of said guide in the longitudinal direction of said guide through a preset length NÂ·&Dgr;t, x(t) is a height of the sectional curve, in &mgr;m, of a sample at a position t in said preset length, and n and m are integers.