公开(公告)号：US3919447A

公开(公告)日：1975-11-11

申请号：US45313874

申请日：1974-03-20

Applicant: IBM

Inventor： KILMER JR CHARLIE C ,  LAURER GEORGE J

IPC: B42D15/10 ,  B44F1/12 ,  G06K19/14 ,  G07F7/08 ,  G06K19/02 ,  G06K7/12

CPC classification number: B42D25/21 ,  B42D25/00 ,  B42D25/346 ,  B42D25/382 ,  B42D25/45 ,  B42D2033/08 ,  B42D2033/18 ,  B42D2033/22 ,  B42D2033/30 ,  B42D2033/32 ,  G06K19/14 ,  G07F7/086 ,  Y10S283/904 ,  Y10S428/916 ,  Y10T428/24331 ,  Y10T428/24802 ,  Y10T428/24851 ,  Y10T428/24868 ,  Y10T428/24942

Abstract: A card suitable for use in personal and item identification; the card comprises a first film such as polyvinyl chloride with a transmission bandpass in the infra red region, and either a selectively apertured second film laminated on the first film, or, discrete areas of the second film laminated on preselected areas of the first film. The second film is opaque at a single frequency within the first film bandpass. The films may be formed from the same material but for the trace amounts of a carbonyl group in the structure of the second film polymer, the laminate otherwise being transparent and reflectively uniform in the visible light region.

Abstract translation: 适用于个人和物品识别的卡片; 卡片包括在红外区域中具有透射带通的聚氯乙烯等第一膜，以及层压在第一膜上的选择性孔径第二膜，或层压在第一膜的预选区域上的第二膜的离散区域。 在第一胶片带通中，第二胶片在单一频率处是不透明的。 膜可以由相同的材料形成，但是对于第二膜聚合物的结构中的痕量的羰基可以形成，否则层压体在可见光区域中是透明的并且反射均匀。