FIELD: electronic engineering. SUBSTANCE: rimband has single seamless block made of synthetic resins containing in its composition mainly polyamide and glass resins. Proportion of polyamide and glass fiber is best of all within the range of 3:7 and 7:3. Length of inner circumference of rimband compared to that of outer circumference of screen edge, while rimband is not yet installed on tube, should be better 98.79-99.90 %. EFFECT: facilitated manufacture and installation on cathode-ray tube; preventing expansion of cracks and explosion directed inside cathode-ray tube. 9 cl, 3 dwg
