METHOD TO PRODUCE FABRICS OF CROSS ZIGZAG SHADOW WEAVES Russian patent published in 2018 - IPC D03D23/00 

FIELD: textile, paper.

SUBSTANCE: method to produce fabrics of crossed zig-zag shadow weaves, consisting in forming on the surface of a tissue teeth arranged along an ascending or descending line formed by oblique surround light bands, changing their width and direction along the length of the fabric, in choosing the basic weave of the main class and one of the yarn systems as active, forming the original shadow weave along the passive system of threads with increasing single overlaps in the steps along the base or along the weft; in the choice of the number of weft threads K_y before the break in the weft, the formation of the first and second fragments of the first tooth and the tooth as a whole, followed by the formation of the second tooth. The rapport is determined on the basis of the R_o of the transverse zigzag shadow weave according to the mathematical expressions: - with the active filament yarn system: - for the odd rapport R_b of the base weave R_o=2R_b[R_b (R_b-1)-1]; - for an even rapport R_b R_o=R_b[R_b(R_b-1)-1]; - with the active system of warp threads and any rapport R_b R_o=2 [R_b(R_b-1)-1]; take the magnitude of the shift of the vertices ±S_b, varying multiply the rapport R_b of the base weave with the active weft system within R_b≤|S_v|≤R_o-R_b, with the active main yarn system within R_b≤|S_v|≤R_o-2(R_b-1) warp yarns, then take the number of weft yams K_y to kink in each denticle, taking into account that on the one hand the number of filaments K_y≥|S_c|+R_b+2, on the other hand, with the active yarn system K_y≥2[R_b(R_b-1)-1], with the active warp yarn system and odd rapport, R_b, the number of yarns K_y≥2R_b[R_b(R_b-1)-1], and for the even repeat R₆ K_y≥R_b[R_b(R_b-1)-1] weft threads; the rapport R_z of the tooth is determined, the number n_z of teeth in the rapport along the weft and the rapport along the weft R_y of the transverse zigzag shadow weave according to the mathematical expressions: R_z=2K_y-[S_c]-2; n_z=LCM=(R_o,S_c)/S_c (LCM - the least common multiple); R_y=R_zn_z. Then on the basis of the source of the shadow weave form oblique light streaks in the first and second fragments of the first teeth and cog in general cross shadow zigzag weave the K_y, R_z and R_o threads; the formation of the second and subsequent teeth exercise, bearing in mind the shift number of vertices ±S_c and number of teeth n_z.

EFFECT: multivariance of the interlacing of the teeth and the possibility of varying within a wide range of the angle of lifting or lowering the line of teeth of the volume crossed zigzags.

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