High-frequency RFID printer

Details High-frequency RFID printer High-frequency RFID printer

2007-09-14

2010-11-16

Nguyen, Anthony H. (Department: 2854)

Typewriting machines

Sheet or web

For feeding web record-medium

C400S719000

Reexamination Certificate

active

07832952

ABSTRACT:
There is disclosed a printer having a print head and a high frequency magnetic coupler to magnetically couple with high frequency RFID transponders in a web at or near the print head. The coupler couples magnetically to only one transponder at a time that is generally aligned with one or more inductors, and magnetic radiation from the inductor(s) may be at least partly shielded from upstream transponders, and a grounded conductor in the upstream side of the coupler diminishes radiation to upstream transponders. One embodiment includes spaced inductors disposed along a generally transverse line across the web, and in another embodiment an elongate inductor extends along a line generally transverse of the web.

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