METHOD OF MANUFACTURE OF HOLLOW RUBBER-TEXTILE ARTICLES Russian patent published in 1995 - IPC

FIELD: inflatable sectional articles; watercraft made of rubberized cloth. SUBSTANCE: used in manufacture of hollow rubber-textile articles are two rolls of rubberized fabric of the same grade differing in width. Fabric are first machined separately along contours of three different groups of blanks forming sections adjoining each other in articles. Extreme blanks of article is made in width of two symmetrical parts with rectilinear longitudinal edges for connecting the parts. Contours of blanks and blank parts are marked out and machined on running fabrics in continuously alternating in length rectilinear pieces in conformity with length of blanks. Longitudinal edges of machine fabrics serve as longitudinal sides of pieces. Cuts are made in edges on contours of machined blanks and component part, and uncut bridges are left on cross sides of contours located opposite to ends of cuts on contours of longitudinal sides. Tops of longitudinal curvilinear contours of part of blanks and component part in pieces of fabrics are displaced longitudinally towards one of their cross sides. Tops of contour of adjacent blanks adjoining above-indicated fabrics in width of pieces are displaced through the same value longitudinally towards other cross side. Fabrics are coiled into separate rolls. Subsequent machining of fabrics is carried out simultaneously in parallel flows. Fabrics are uncoiled from rolls and, being moved simultaneously, are coated with glue applied along cuts of edges of contours of blanks and component part, and then treated sections of fabrics inside blanks contour are coated from back side. Then coating is dried and blanks and component part are separated by cutting the bridges and are connected according to definite sequence along rectilinear and curvilinear longitudinal edges to from assembled panel of separate article. Rectilinear longitudinal edges of parts of sectional blanks serve as cross edges of assembled panel. Hollow article closed over perimeter is formed by connecting longitudinal and cross edges of assembled panel. Prior to connecting the later, flexible partitions and filling valves are mounted on prepared sections. EFFECT: enlarged operating capabilities. 19 dwg