Abstract:
A recording medium is provided, such as paper, secured by magnetic microwires. The recording medium comprises: a pulp structure formed by pulp fibers, said pulp structure carrying microwires having a metal core of a predetermined material composition, and an insulating layer coating on said metal core; and at least one coating layer on at least one side of said pulp structure. The pulp structure is a single-layer structure with the microwires fully embedded in said single layer, the microwires having cross-sectional dimensions approximately equal to cross-sectional dimensions of the pulp fibers.
Abstract:
A device for identification of an object, comprising a scattering magnetic element (12, 22, 32) attached to the object. The scattering magnetic element has a permeability, which is dependent on a magnetic field exposed to the magnetic element. Moreover, there is a source (13, 14, 15; 25; 35) of an alternating magnetic field for exposure of said scattering magnetic element. A microwave transmitter (16) exposes the scattering magnetic element for microwaves and a microwave receiver (17) receives microwaves scattered or reflected from the scattering magnetic element and modulated by the alternating magnetic field. The source of an alternating magnetic field is arranged on-board of the object and is powered by a battery. In an embodiment, the source of an alternating magnetic field comprises an LC- circuit having a resonance frequency and wherein the scattering magnetic element is arranged adjacent a symmetry axis of a L-member of the LC-circuit. In another embodiment, the object comprises an oscillator, the output of which is connected to the ends of the scattering magnetic element for passing an alternating current through the magnetic element. The scattering magnetic element is of a magnetic material, such as an amorphous or nano- crystalline magnetic wire, having a length corresponding to half the wavelength of the microwaves.
Abstract:
For use in a magnetic theft detection system a magneto- mechanical marker containing semihard ferromagnetic strip and amorphous magnetostrictive element made from alloy having composition in atomic % corresponding to the formula: NiaFebCocM' kM' 'mBdSie; wherein M' is at least one element from the group consisting of Cr, Mo, and Mn, and M' ' is at least one element from the group consisting of surface active elements like Sn, Pb and Bi, and "a" ranges 15 to 32, "b" ranges 22 to 29, "c" ranges 24 to 29.5, "d" ranges 15 to 25, "e" ranges O to 3, "k" is the sum of amount of elements of group M' and ranges from 5.1 to 10, "m" ranges from 0.001 to 0.04 and sum of "a-m" is 100, consisting of at least one or more amorphous magnetostrictive strip pieces disposed in a stack, each having a length and width and the respective widths of said at least two or more magnetostrictive strip pieces being substantially different or equal and not exceeding 10 mm, and the respective lengths of said at least two or more magnetostrictive strip pieces being substantially equal, and semihard ferromagnetic strip disposed so to bias said magnetostrictive element with dc magnetic field ranging from 3.0 to 10.0 Oe.
Abstract:
L'invention concerne un article de sécurité adhésif non réutilisable et détectable à distance comportant un support (1), des motifs discontinus (2) non visibles et disposés sur le support (1) et ayant la propriété de réduire l'adhésivité enter le support (1) et une couche d'adhésif (3) qui recouvre les motifs (2) et la partie du support (1) hors les motifs, ledit adhésif (3) étant résistant à la temperature, et un élément de sécurité détectable à distance (4). Elle concerne aussi son utilisation pour protéger l'ouverture/fermeture d'un emballage ou analogue.
Abstract:
A glassy metal alloy consists essentially of the formula CoaNibFecMdBeSifCg, where M is at least one element selected from the group consisting of Cr, Mo, Mn and Nb, "a-g" are in atom percent and the sum of "a-g" equals 100, "a" ranges from about 25 to about 60, "b" ranges from about 5 to about 45, "c" ranges from about 6 to about 12, "d" ranges from about 0 to about 3, "e" ranges from about 5 to 25, "f" ranges from about 0 to about 15 and "g" ranges from about 0 to 6, said alloy having a value of the saturation magnetostriction between -3 ppm and +3 ppm. The alloy can be cast by rapid solidification from the melt into ribbon, sheet or wire form. The alloy exhibits non-linear B-H hysteresis behavior in its as-cast condition. The alloy is further annealed with or without magnetic field at temperatures below said alloy's first crystallization temperature, having non-linear B-H hysteresis loops. The alloy is suited for use as a magnetic marker in electronic article surveillance systems utilizing magnetic harmonics.
Abstract:
A security device such as an anti-pilferage label or authentication label comprises as security feature a (first) soft-magnetic thin film having a thickness ranging from 100 nm to 2000 nm. The thin film is composed of an amorphous CoxZryNbz alloy, where x, y and z are atomic percentages and fulfil following conditions: (a) x ranging between 80 and 95; (b) y and z ranging between 0 and 20; (c) y + z = 100 - x. Due to the high effective relative permeability mu r, and the direction of its easy axis, a label with a CoZrNb thin film is relatively independent of its geometry.
Abstract translation:诸如防盗标签或认证标签之类的安全装置包括具有100nm至2000nm厚度的(第一)软磁薄膜作为安全特征。 该薄膜由无定形CoxZryNbz合金组成,其中x,y和z为原子百分比,满足以下条件:(a)x范围在80和95之间; (b)y和z的范围在0和20之间; (c)y + z = 100-x。 由于高有效相对磁导率μr及其易轴方向,具有CoZrNb薄膜的标签与其几何形状相对独立。
Abstract:
A resonator, having a width no larger than about 13 mm, for use in a marker containing a bias element which produces a bias magnetic field in a magnetomechanical electronic article surveillance system is produced from annealed ferromagnetic ribbon having a basic composition FeaCobNicSixByMz wherein a, b, c, x, y and z are in at%, wherein M is one or more glass formation promoting elements and/or one or more transition metals, and wherein 15
Abstract translation:具有不大于约13mm的宽度的谐振器用于包含在机电电子物品监视系统中产生偏置磁场的偏置元件的标记中,由具有基本组成FeaCobNicSixByMz的退火铁磁带制成,其中a,b ,c,x,y和z为at%,其中M为一种或多种玻璃形成促进元素和/或一种或多种过渡金属,并且其中15≤i≤30,6/ / = 18,27 = c = 55,0 = x = 10,10 = 25,0 = 5, y + z = 25,使得+ b + c + x + y + z = 100。铁磁带在垂直于带轴的磁性取向中退火,和/或在对带施加拉伸应力 沿着色带轴。 可以通过从退火的带切割元件来形成单个谐振器或多个谐振器组件。 如果形成多个谐振器,则将这些元件置于对准中。 所得到的窄(6mm宽)谐振器具有与较宽谐振器的性质相当的特性,例如常规的12.7mm宽的谐振器。
Abstract:
A magnetostrictive element for use in a magneto-mechanical marker has a resonant frequency characteristic that is at a minimum at a bias field level corresponding to the operating point of the magnetomechanical marker. The magnetostrictive element has a magnetomechanical coupling factor k in the range 0.28 to 0.4 at the operating point. The magnetostrictive element is formed by applying cross-field annealing to an iron-rich amorphous metal alloy ribbon (45 to 82 percent iron) which includes a total of from 2 to 17 percent of one or more of Mn, Mo, Nb, Cr, Hf, Zr, Ta, V. Cobalt, nickel, boron, silicon and/or carbon may also be included. The metal alloy may include one early transition element selected from the group consisting of Zr, Hf and Ta, and also a second early transition element selected from the group consisting of Mn, Mo, Nb, Cr, and V.
Abstract:
A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system has improved properties and can be manufactured at higher annealing speeds and reduced raw material cost by virtue of being continuously annealed in the simultaneous presence of a magnetic field perpendicular to the ribbon axis and a tensile stress applied along the ribbon axis and by providing an amorphous magnetic alloy containing iron, cobalt and nickel in which the portion of iron is more than about 15 at% and less than about 30 at%.
Abstract:
A glassy metal alloy consists essentially of the formula FeaCobNicMdBeSifCg, where "M" is at least one member selected from the group consisting of molybdenum, chromium and manganese, "a-g" are in atom percent, "a" ranges from about 19 to about 29, "b" ranges from about 16 to about 42, "c" ranges from about 20 to about 40, "d" ranges from about 0 to about 3, "e" ranges from about 10 to about 20, "f" ranges from about 0 to about 9 and "g" ranges from about 0 to about 3. The alloy can be cast by rapid solidification into ribbon, annealed to enhance magnetic properties, and formed into a marker that is especially suited for use in magneto-mechanically actuated article surveillance systems. Advantageously, the marker is characterized by substantially linear magnetization response to an applied magnetic field in the frequency regime wherein harmonic marker systems operate magnetically. Voltage amplitudes detected for the marker are high, and interference between surveillance systems based on mechanical resonance and harmonic re-radiance is virtually eliminated.