| 摘要 |
FIELD: transportation, package.SUBSTANCE: material contains multiple magnetising sections printed on it, containing at least one spot per package formed from the material. The package has lower and upper parts, at the same time at least one of magnetising sections provides for a magnetic mark that bears a pattern of force lines of magnetic field, containing the first peak of the magnetic field having the first polarity and the second peak of the magnetic field having the second opposite polarity, and the material has longitudinal direction determined in parallel to a pipe or a joint that connects the lower and upper parts of the package, a transverse direction perpendicular to the longitudinal direction, and an imaginary line between the middle point of the first peak and the second peak of the pattern of power lines of the magnetic field. Peaks of the pattern of power lines have distribution that substantially creates a force of a permanent magnetic field along the width of the pattern of force lines in the direction perpendicular to the imaginary line, and creating an intensely reducing force of the magnetic field outside the width of the pattern of force lines in the direction perpendicular to the imaginary line. Besides, the pattern of the force lines is arranged so that the angle between the imaginary line and the longitudinal direction is between -10 and 10 degrees, preferably, between -5 and 5 degrees, preferably around 0 degrees.EFFECT: invention provides for improved placement of marking on a web.9 cl, 17 dwg |
