Abstract: A vertical joint system 10 for substrates 12 is formed with joints Jm and Jf which engaged by relative motion in a direction perpendicular to major surfaces 14 and 16 of the substrate 12. The joints are configured to enable relative rotation of up to 3 degrees (i.e. clockwise or anticlockwise) while maintaining engagement of the joints. The joints Jm and Jf are further configured to form two locking planes 18, 20 one on each of the inner and outer most sides of the joint. Engagement about the locking planes 18, 20 is provided by transverse outward extending surfaces Cm1, Cm2, Cf1 and Cf2. The surface Cf1 and Cf2 overhang the surfaces Cm1 and Cm2. At least one surface in each pair of engaging surfaces: Cf1 and Cm1; and, Cf2 and Cm2 is smoothly curved. The joints Jm and Jf can be further arranged to provide a third locking plane 74 parallel to and between the locking planes 18, 20.

Abstract: A vertical joint system for substrates is formed with joints Jm and Jf which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees (i.e. clockwise or anticlockwise) while maintaining engagement of the joints. The joints Jm and Jf are further configured to form two locking planes, one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces Cm1, Cm2, Cf1 and Cf2. The surface Cf1 and Cf2 overhang the surfaces Cm1 and Cm2. At least one surface in each pair of engaging surfaces: Cf1 and Cm1; and, Cf2 and Cm2 is smoothly curved. The joints Jm and Jf can be further arranged to provide a third locking plane parallel to and between the locking planes.

Abstract: A panel 10 is formed with first and second joint systems 20 and 22 to enable engagement of a plurality of panels 10 along their sides 16 and 18. The first joint system 20 has a laterally extending tongue 24a along one longitudinal side 16a and a groove 24b along an opposite longitudinal side 16b. The second joint system 22 is a vertical joint system having mutually engageable male and female parts Jm and Jf respectively. The male part Jm is formed on one transverse the side 18a, while the female part Jf is formed on an opposite transverse side 18b.

Abstract: A vertical joint system for substrates is formed with joints Jm and Jf which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees (i.e. clockwise or anticlockwise) while maintaining engagement of the joints. The joints Jm and Jf are further configured to form two locking planes, one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces Cm1, Cm2, Cf1 and Cf2. The surface Cf1 and Cf2 overhang the surfaces Cm1 and Cm2. At least one surface in each pair of engaging surfaces: Cf1 and Cm1; and, Cf2 and Cm2 is smoothly curved. The joints Jm and Jf can be further arranged to provide a third locking plane parallel to and between the locking planes.

Abstract: A vertical joint system for substrates is formed with joints Jm and Jf which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees (i.e. clockwise or anticlockwise) while maintaining engagement of the joints. The joints Jm and Jf are further configured to form two locking planes, one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces Cm1, Cm2, Cf1 and Cf2. The surface Cf1 and Cf2 overhang the surfaces Cm1 and Cm2. At least one surface in each pair of engaging surfaces: Cf1 and Cm1; and, Cf2 and Cm2 is smoothly curved. The joints Jm and Jf can be further arranged to provide a third locking plane parallel to and between the locking planes.

Abstract: A vertical joint system for substrates is formed with joints Jm and Jf which engaged by relative motion in a direction perpendicular to major surfaces and of the substrate. The joints are configured to enable relative rotation of up to 3 degrees (i.e. clockwise or anticlockwise) while maintaining engagement of the joints. The joints Jm and Jf are further configured to form two locking planes, one on each of the inner and outer most sides of the joint. Engagement about the locking planes is provided by transverse outward extending surfaces Cm1, Cm2, Cf1 and Cf2. The surface Cf1 and Cf2 overhang the surfaces Cm1 and Cm2. At least one surface in each pair of engaging surfaces: Cf1 and Cm1; and, Cf2 and Cm2 is smoothly curved. The joints Jm and Jf can be further arranged to provide a third locking plane parallel to and between the locking planes.