METHOD FOR MANUFACTURE OF PRESERVATIVE Russian patent published in 2002 - IPC

FIELD: manufacture of preservative, condom, applicable in manufacture of a formed preservative with specific roundness. SUBSTANCE: processing model for manufacture of the preservative consists of an oblong cylindrical section with an end closed with an S-shaped profiled section and a reservoir part adjoining it. The profiled section has a recess formed by two truncated cones joined to each other with the smaller upper bases. The gradient is varying continuously in the longitudinal direction of the processing model surface. The diameter of the processing model in the narrowest point of the recess makes up 15 to 25 mm, and the radius of curvature in this point makes up 17 to 20 mm. The opening of the upper truncated cone that is open towards the reservoir part makes up 50 deg., and that of the lower truncated cone makes up 40 deg. The curvature in the point of transition from the cylindrical part to the recess in the profiled section has a radius exceeding 25 mm. The total length from the recess to the inlet to the reservoir part makes up 45 to 65 mm. The maximum diameter of the profiled section between the recess and the inlet to the reservoir part makes up 33-35 mm. The invention provides for another modification of the processing provides for another modification of the processing model, method and device for its manufacture. EFFECT: guaranteed close fit and reliability in use. 16 cl, 13 dwg