摘要:
An RFID tag is disclosed adapted to be read by an interrogator including a reader antenna having a carrier frequency. The tag includes a first circuit including a first inductor and a first capacitor, wherein the first circuit is tuned to a frequency above the carrier frequency to compensate for detuning in the presence of a plurality of tags. The RFID tag includes a second circuit including a second inductor and a second capacitor wherein the first and second inductors are arranged to be coupled electromagnetically with a coupling factor less than unity and the second circuit is tuned to increase coupling between the first circuit and the reader antenna. A method of reading an RFID tag in the presence of a plurality of tags is also disclosed.
摘要:
A method of verifying authenticity of an object including: a) a step of filling a database of a verification server comprising: physically associating an object with an electronic tag containing unique digital identification data IDobject; acquiring a photograph Pobject of the object, followed by acquiring the digital identification data IDobject; sending the pair (IDobject, Pobject) to the verification server to be recorded in the database; and b) a subsequent step of verifying the authenticity of the object comprising: acquiring a photograph Pproduct and digital identification data IDproduct of the product by acquisition means; sending the data Pproduct and IDproduct to the verification server; using the verification server to compare the photograph Pproduct with the photograph Pobject associated with the digital identification data IDproduct equal to the digital identification data IDproduct of the object and stored in the database.
摘要:
The invention is in the field of devices enabling the sticking of splicing tapes to the ends of strips put into rolls, to prevent their later unwinding. The present invention relates to a device (1) for applying splicing tapes (22) on a strip (30) made of flexible material. The device (1) is equipped with a passive device (50) enabling the elimination of the electrostatic forces that disturb the operation of the device. The device (1) according to the invention is mainly used on photographic film or paper slitters.
摘要:
A process for making a thermoplastic composition by dynamic cross-linking of a composition containing a thermoplastic matrix polymer A having functional groups reactive with epoxide groups and a polymer B having epoxide groups and secondary hydroxyl groups, and optionally other components. Separate addition of a cross-linking agent may be omitted.
摘要:
An electronic chip device includes an interface support film having a support film and at least one flat conductive interface placed on the support film, as well as a microcircuit connected to the interface. The interface support film possesses such properties that it can be creased or folded on itself without deterioration. The support film possesses a thickness of less than 75 &mgr;m, the best results being obtained with a thickness of between 10 &mgr;m and 30 &mgr;m. Preferably the support film is selected from among polypropylene (PP), polyethylene (PE), polyethylene teraphtalate (PET). In one embodiment, the device includes a compensation film placed on the support film. The compensation film has a recess containing the microcircuit and its connections. The recess can contain a material to encapsulate the microcircuit and its connections.
摘要:
The invention relates to a sound transducer in fluoride polyvinylidene (FPVD), its process of manufacture and integration into a card producing acoustic signals transmittable by telephone route. The process is chiefly characterized in that it consists of making (10) dual surface metallization strips distributed over the entire width of a ribbon in FPVD of great length and of very narrow thickness, cutting (11) each metallization strip into a unit film, fixing (12) a portion of film onto a pre-determined site of an interconnection array made on the rear surface of the card, cutting away excess film, then placing the film portion under stress (13), in such manner that it may emit acoustic signals when voltage is applied to it. This process is highly useful for the manufacture of acoustic signal producing cards of very narrow thickness and low cost price.
摘要:
A process for manufacturing a hybrid card, and a hybrid card which functions as a smart card with flush contacts and/or produces acoustic signals which can be transmitted by telephone. The card includes a first sheet that has on one of its surfaces an interconnection pattern and electronic components, and through the body of the first sheet perforations for a double faced micro module (10). A second sheet is on an opposite face of the card. An intermediate sheet is between the other two sheets and has cut-outs (210, 215) in which are housed electronic components affixed to the first sheet, and has metal coatings (260) for making electrical connection to the micro module (10) and also to the interconnection pattern (110) on the first sheet (100).
摘要:
A polyol composition useful for the preparation of high resilience polyurethane foams comprising (1) from 80 to 99.8 weight percent of a high functionality polyol or a polyol blend having an average nominal functionality between 3.2 and 6, and from 0.2 to 20 weight percent, a subsidiary polyalkylene oxide having a poly(oxyethylene) content greater than 30 percent, or (2) from 50 to 98 weight percent of a high functionality polyol or a polyol blend having an average nominal functionality between 3.2 and 6, from 0 to 0.9 weight percent of a subsidiary polyalkylene oxide having poly(oxyetheylene) content greater than 30 percent, and from 2 to 50 weight percent of a polymer. The average nominal functionality of the polyol composition is between 3.2 and 6. This polyol composition provides greater latitude for varying formulation components in the preparation of high resilience polyurethane foam as with broad density and load ranges.
摘要:
A vacuum enclosure rests on two parts to be seam-welded by the electron-beam welding technique and surrounds a support for an electron gun. The support is made up of two separable elements, the first element being constituted by a frame applied in vacuum-tight manner against the parts to be welded by means of a seal fitted on one face, the other face being applied against a flange of the second element which forms a bell-housing and is applied against the frame.
摘要:
An electron gun which is displaced on a carriage relatively to two abutting cylindrical sleeves is guided so as to produce an electron beam which travels along the line of junction, the carriage being housed within a vacuum-tight enclosure which is applied against the sleeves on each side of the junction line. The cylindrical sleeves are supported and displaced in rotation about a horizontal axis with an equal range of motion and at a speed of opposite sign with respect to the linear speed of the carriage. The carriage thus remains motionless in a position such that the electron beam is continuously vertical.