Arrangement utilizing a magnetic attractive force
The present invention relates to an arrangement enabling edge-to-edge joining, by means of a magnetic attractive force, of a first edge portion 811 a ) of a first panel ( 11 ) in a display system to a second edge portion ( 12 b ) of a second panel ( 12 ), a first magnetised strip ( 11 e ) being applied to said first edge portion ( 11 a ) and a second magnetised strip ( 12 b ) being applied to said second edge portion ( 12 b ). The magnetised strips ( 11 e, 12 d ) are assigned such magnetisation directions (s-n; n-s) that, in a position where the edge portions are in proximity and/or co-operating with each other, they assume a position attracted to each other. Said strips ( 11 e , 12 d ) consist of a material different from the material of the panel ( 11, 12 ). The modulus of elasticity and the thickness (2600 MPa; 0.2 mm) of said panel ( 11 ) and the modulus of elasticity and the thickness (100 MPa; 0.7 mm) of said strips ( 11 e, 12 d ) are such that only small axial stress related forces, or none at all, will act within the attachment means ( 50, 51 ). Said strips ( 11 e, 12 d ) are assigned a thickness (“d”) of less than 1.0 mm.
1. An arrangement for enabling edge-to-edge joining by a magnetic attractive force, of a first edge portion of a first panel in a display system to a second edge portion of a second panel, a first magnetized strip being applied to said first edge portion and a second magnetized strip being applied to said second edge portion, the first and second magnetized strips being assigned magnetization directions that, in a position where the edge portions are in proximity and/or co-operating with each other, the first and second magnetized strips assume a position attracted to each other, the first and second magnetized strips are of a material different from the material of the panel, and have means for attaching the first and second magnetized strips to the panel, the first and second magnetized strips being oriented close to said edge portions and said means for attaching being in the form of an adhesive layer, characterized in that the modulus of elasticity and the thickness of said panel and the modulus of elasticity and the thickness of the first and second magnetized strips is such, relation to each other, that only small axial stress related forces, or none at all, will act within said attaching means or adhesive layer during a rolling up sequence, and wherein the first and second magnetized strips each is assigned a uniform thickness of less than 1.0 mm.
2. The arrangement as claimed in claim 1 , wherein the modulus of elasticity for said first and second panels is selected within the range of 2000 to 3500 MPa.
3. The arrangement as claimed in claim 1 , wherein the modulus of elasticity for said first and second strips is selected within the range of 60-200 MPa.
4. The arrangement as claimed in claim 1 , wherein the thickness of said first and second strips is selected as 0.2-0.8 mm and contains neodymium magnetic granular material.
5. The arrangement as claimed in claim 1 , wherein the magnetization of one strip is selected N-S and in a transverse direction S-N for said second strip.
6. The arrangement as in claim 1 , further comprising a strip part of each said strip assigned a magnetization direction that is chosen along the whole length of the strip.
7. The arrangement as claimed in claim 1 , wherein said first magnetized strip and said second magnetized strip are assigned different colors.