BUILDING PANEL JOINTING SYSTEM Russian patent published in 2001 - IPC

FIELD: jointing building panel especially those for thin, solid floating or loose floors. SUBSTANCE: adjacent edges of joints between two panels are joined together to form first mechanical joint fixing edges of joint D1 in first direction perpendicular to main plane of panels. Fillet provided in each joint is built integral with one edge of joint and projects beyond other edge of joint. Fillet has fastening member projecting upwards and entering closing slot on rear side of other edge of joint to form second mechanical joint for fixing panels in second direction D2 parallel to main plane of panels and at right angle to joint. Both first and second mechanical joints permit displacement of joined panels in direction of joint. EFFECT: reduced thickness of panels used for the purpose. 9 cl, 13 dwg