CN2214026Y

CN2214026Y - Anti-forge trade mark with easy identify polaroid

Info

Publication number: CN2214026Y
Application number: CN 93214642
Authority: CN
Inventors: 张志星
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-27
Filing date: 1993-05-27
Publication date: 1995-11-29
Anticipated expiration: 2003-05-27

Abstract

The utility model provides an anti-forge trade mark which does not need to use an identification instrument and is difficult to imitate. The anti-forge trade mark is characterized in that a polarizing film which is designed according to the same patterns is respectively pasted a position where the upper and the lower layers of the trade mark are corresponding, and the polarization directions of the polarizing films are vertical mutually. When the polarizing films are superposed, a black pattern can be observed under light rays. When the polarizing films are opened to be a single layer, the pattern can not be observed. Thereby, the utility model has an anti-forge function. The anti-forge trade mark is suitable for the anti-forging of trademarks, paper currencies, packages, etc.

Description

Anti-forge trade mark with easy identify polaroid

The utility model relates to a kind of anti-false trademark that just can recognize and be difficult to copy by identification instrument of need not.

Anti-false trademark has printing ink false proof (divide the false proof and fluorescent ink of magnetic ink false proof etc.), tinsel is false proof, the anti-open material is false proof and holographic laser anti-counterfeiting etc.The false proof need of printing ink and tinsel could be discerned with special detecting instrument, temporarily also is difficult to be accepted by popular.Although the anti-open material is false proof and holographic laser anti-counterfeiting need not easily by imitated, can not really play anti-fake effect by instrument identification.

The purpose of this utility model provides a kind of need not and also is difficult for by the imitated polarisation anti-false trademark that utilizes the optical polarization principle to make by instrument identification.

The purpose of this utility model realizes by following proposal:

This anti-false trademark is respectively pasted a slice polaroid by upper and lower two-layer the composition at the correspondence position of upper and lower layer, and polaroid is by the identical patterns design, and the polarization direction of two polaroids is vertical mutually.

The utility model is owing to adopted two orthogonal polaroids in polarization direction, during identification, natural light or light is by behind the polaroid of upper strata, and the polarization of light direction is mutual vertical with lower floor polaroid direction and can not pass through, and light just stays next lighttight black pattern sign like this.Trade mark launches the back individual layer and then can't see pattern.The utility model only needs just can discern anti-false sign by natural light or light, and need not any identification instrument, and the manufacture difficulty of polaroid has prevented the possibility that other people copy.

Fig. 1 is the synoptic diagram of anti-false trademark upper strata polaroid.

Fig. 2 is the synoptic diagram of anti-false trademark lower floor polaroid.

Below in conjunction with accompanying drawing the utility model is remake further to arrange and states:

With reference to Fig. 1,2, respectively paste polaroid (1), (2) at upper and lower layer correspondence position of trade mark (3), the polarization direction of polaroid (1), (2) is vertical mutually.The identical patterns design is all pressed in above-mentioned polaroid (1), (2).Do not debate and carry out in two steps: trade mark is looked after (identical) earlier under natural light or light, can be seen black pattern as shown in the figure with Mao Zedong's watermark head portrait view in the Renminbi; Trade mark is opened, then the trade mark individual layer be can't see pattern again, and this has just played anti-fake effect.

Claims

1, a kind of polarisation anti-false trademark is characterized in that: at the bilevel correspondence position of trade mark (3), each pastes polaroid (1), (2) by the identical patterns design, and the polarization direction of polaroid (1), (2) is vertical mutually.