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    • 5. 发明申请
    • IMPROVING STABILITY OF COVERT PIGMENTS
    • 改善覆盖颜料的稳定性
    • WO2005119584A3
    • 2009-04-02
    • PCT/US2005018746
    • 2005-05-27
    • DIGIMARC CORPBI DAOSHENJONES ROBERT LRICHARDSON JACK
    • BI DAOSHENJONES ROBERT LRICHARDSON JACK
    • G06K19/02C09D11/00C09D11/02G06K7/08G06K19/00G06K19/06
    • G06K19/06046C09D11/037C09D11/322
    • A covert material for printing onto a printing medium is provided, the covert material comprising a covert pigment and a binder encapsulating the covert pigment into a particle, where the binder comprises at least on of cellulose acetate butyrate (CAB), butyral vinyl acetate, acetyl butyrate, and acetate butyrate. Alternatively, th binder comprises at least one of polyester, polyolefin, acetyl butyrate, acetate butyrate, polystyrene copolymer, and polystyrene-polyvinylpyridine. The covert material can comprise additional components, such as ethyl acetate and/or n-propyl acetate. In one embodiment, the covert pigment comprises about 0.5-5% of the covert material. In one embodiment, the binder comprises about 5-30% of the covert material. In one advantageous embodiment, the covert pigment comprises at least 2% of the covert material and the binder comprises about 20-25% of the covert material. The covert material can further comprise at least one of a colorant, a surface additive, and a magnetic particle. The covert material can be part of a toner or ink. In at least some embodiments, the particle can have many different sizes, including sizes greater than 1 micron, greater than 5 microns, and greater than 20 microns.
    • 提供了用于印刷到打印介质上的隐蔽材料,所述隐蔽材料包括隐蔽颜料和将所述隐蔽颜料包封成颗粒的粘合剂,其中所述粘合剂至少包含乙酸丁酸纤维素(CAB),丁缩醛乙酸乙烯酯,乙酰基 丁酸酯和乙酸丁酸酯。 或者,粘合剂包括聚酯,聚烯烃,丁酸乙酰酯,乙酸丁酸酯,聚苯乙烯共聚物和聚苯乙烯 - 聚乙烯吡啶中的至少一种。 隐蔽材料可以包含另外的组分,例如乙酸乙酯和/或乙酸正丙酯。 在一个实施方案中,隐蔽颜料包含约0.5-5%的隐蔽材料。 在一个实施方案中,粘合剂包含约5-30%的隐蔽材料。 在一个有利的实施方案中,隐蔽颜料包括至少2%的隐蔽材料,并且粘合剂包含约20-25%的隐蔽材料。 隐蔽材料可进一步包括着色剂,表面添加剂和磁性颗粒中的至少一种。 隐蔽材料可以是调色剂或墨水的一部分。 在至少一些实施方案中,颗粒可以具有许多不同的尺寸,包括大于1微米,大于5微米和大于20微米的尺寸。
    • 8. 发明申请
    • IMAGE DESTRUCT FEATURE USED WITH IMAGE RECEIVING LAYERS IN SECURE DOCUMENTS
    • 图像破坏特征与安全文件中的图像接收层一起使用
    • WO2006104857A2
    • 2006-10-05
    • PCT/US2006010633
    • 2006-03-22
    • DIGIMARC CORPBI DAOSHENYEH TUNG-FENGJONES ROBERT LLABREC BRIAN C
    • BI DAOSHENYEH TUNG-FENGJONES ROBERT LLABREC BRIAN C
    • B44C1/17
    • B42D25/47B42D25/00B42D25/23B42D25/455B42D25/46B44C1/17Y10S428/916Y10T428/24802
    • An image destruct material comprises a release layer positioned between an image receiving layer and a base layer. The adhesion between the release layer and the base layer is greater than adhesion between the release layer and the image receiving layer. The release layer material can be used in secure documents that have an image receiving layer, such as used for dye diffusion, mass transfer, ink jet, and xerographic printing. For example, particular implementations are designed for identification documents with a D2T2 image receiving layer. In these implementations, for example, the release layer is in the form of a patterned coating under the image receiving layer. After information is printed on the image receiving layer, an overlaminate is applied over it. Removal of the overlaminate destroys the printed image on the receiving layer because the relative adhesive properties of the image receiving layer, overlaminate and release layer cause the image to release with the overlaminate at the locations of the coating whereas the remainder of the image remains with the base layer.
    • 图像破坏材料包括位于图像接收层和基底层之间的释放层。 脱模层与基层之间的粘附性大于剥离层和图像接受层之间的粘合。 释放层材料可以用于具有图像接收层的安全文件中,例如用于染料扩散,传质,喷墨和静电印刷。 例如,特定实现被设计用于具有D2T2图像接收层的识别文档。 在这些实施方案中,例如,剥离层是图像接收层下面的图案化涂层的形式。 在图像接收层上打印信息之后,在其上施加覆盖层。 由于图像接收层,层叠和释放层的相对粘合性能使图像在涂层的位置处与覆盖层一起释放,而图像的其余部分保留在 基层。
    • 9. 发明申请
    • FORENSIC FEATURE FOR SECURE DOCUMENTS
    • 威胁证件的安全文件
    • WO2007117261A3
    • 2008-11-20
    • PCT/US2006029471
    • 2006-07-26
    • DIGIMARC CORPBI DAOSHENYEH TUNG-FENGJONES ROBERT LCARR J SCOTT
    • BI DAOSHENYEH TUNG-FENGJONES ROBERT LCARR J SCOTT
    • G06K21/06
    • B42D25/373B41F11/02B41M3/14B41M5/502B42D25/00B42D25/23B42D25/309B42D25/313B42D25/318B42D25/333B42D25/45B42D2033/30B42D2033/32
    • A forensic feature for a secure document comprises a base document layer and a covert material applied to the base document layer. The covert material includes a carrier and forensic material within the carrier. The forensic material includes a ratio of salts or oxides of metals, such as rare earth metals. The ratio is selected to correspond with a source of the document. The forensic material may be mixed into a coating or ink that is applied at predetermined locations on a secure document. The ratio is then measurable from metal ion signals of the salts or oxides. This ratio, or some metric derived from it, may be linked with information embedded elsewhere in the document to enable verification of the document. Another forensic document feature has a forensic metric that is measurable from a covert material in the document, and this forensic metric corresponds to a source of the document. A blocking layer applied over the covert material prevents access to the covert material such that at least partial destruction of the document is required to measure the forensic metric. The blocking layer may have a blocking property that blocks electromagnetic waves from activating the covert material, or blocks the electromagnetic waves from the covert material in response to the activating waves. The blocking layer is deconstructed to access the forensic feature, verify the document and perform forensic tracking.
    • 用于安全文档的取证功能包括应用于基本文档层的基本文档层和隐蔽材料。 隐蔽材料包括载体和载体内的法医材料。 法医材料包括金属的盐或氧化物的比例,例如稀土金属。 该比率被选择为与文档的来源相对应。 法医材料可以混合到在安全文件上的预定位置施加的涂层或油墨中。 然后可以从盐或氧化物的金属离子信号测量该比例。 该比率或从其导出的某种度量可能与文档中其他地方嵌入的信息相关联,以便能够验证文档。 另一个法医文档特征具有可从文档中的隐蔽材料测量的取证度量,并且该法医指标对应于文档的来源。 施加在隐蔽材料上的阻挡层防止对隐蔽材料的访问,使得需要文档的至少部分破坏来测量取证度量。 阻挡层可以具有阻挡电磁波激活隐蔽材料的阻挡特性,或者响应于激活波阻挡来自隐蔽材料的电磁波。 阻塞层被解构以访问取证功能,验证文档并执行取证跟踪。