215results about How to "Increase the difficulty of counterfeiting" patented technology

A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an embossed region with an optical diffraction pattern or a holographic image pattern. A color shifting optical coating is formed on the substrate such as on the opposing second surface, with the optical coating providing an observable color shift as the angle of incident light or viewing angle changes. The security article can be used in a variety of applications and products to provide for enhanced security measures such as anticounterfeiting.

The present invention discloses a kin of anti-false coated white card paper. It is characterized by that in the coated white card paper a pattern layer is formed by means of spraying mode. The described patter layer can be colourless or coloured or fluorescent. Said pattern layer can be one layer or several layer, and can be various regular or irregular graphs of straight line, curve, company mark and LOGO of customer, etc. and can be set in the interlayer of coated white card paper or between face paper layer and core paper layer or between core paper layer and bottom paper layer. Its production method includes the following steps: (1) making pulp; (2). Making face paper layer, core paper layer and bottom paper layer; and (3). Spraying at least on layer of pattern.

The invention relates to an electromagnetic oven power automatic calibration method which comprises the following steps of: 1. selecting two current test values within the working current range of an electromagnetic oven, enabling the electromagnetic oven to operate under the conditions of the current test values and zero and detecting the voltage values of current signals under the three operating conditions; computing a coefficient k and an intercept b by a CPU (Central Processing Unit) by adopting three groups of data according to a formula y(i)=k*i+b and storing; and 2. when in working, computing a current current signal i by the CPU by adopting the voltage value y(i) of the current current signal detected by a current detection and acquisition circuit and the k and b according to a formula i=1 / k*y(i)-b / k and then computing the current power according to the current current signal and a current voltage signal. A calibration procedure is built in a chip to set the automatic acquisition of parameters and compute and calibrate the parameters; and when in working, the electromagnetic oven power automatic calibration method can automatically calibrate the current or the power, provides an accurate basis for the adjustment of the electromagnetic oven power, can replace the calibration mode of a traditional potentiometer, saves the cost and has improved reliability.

The invention relates to a random die-cutting type anti-counterfeiting structure, a laser die cutter, a die cutting method and an anti-counterfeiting method, wherein the anti-counterfeiting structure comprises an inquiry information zone, a result checkout zone and a random slitting zone; the inquiry information zone includes sequence and anti-counterfeiting inquiry information, the result checkout zone is provided with inquiry character anti-counterfeiting features, and the random slitting zone is slit into an inquiry-attached part and a checkout-attached part according to a randomly generated die cutting line and the anti-counterfeiting structure is further cut into a first part and a second part, wherein the first part comprises the inquiry information zone and the inquiry-attached part, and the second part comprises the result checkout part and the checkout-attached part. According to the invention, the requirement of slitting type anti-counterfeiting can be met, the counterfeiting difficulty is increased and the anti-counterfeiting effect is improved; and moreover, the product value and application scope of a laser die cuter can be improved, thereby meeting the demands of the market.