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1. (WO2001084542) CODING OF CARTRIDGES FOR AN INJECTION DEVICE

Pub. No.:    WO/2001/084542    International Application No.:    PCT/DK2001/000298
Publication Date: Fri Nov 09 00:59:59 CET 2001 International Filing Date: Thu May 03 01:59:59 CEST 2001
IPC: A61J 1/06
G06K 19/06
Applicants: NOVO NORDISK A/S
Inventors: AASMUL, Søren
POULSEN, Jens, Ulrik
Title: CODING OF CARTRIDGES FOR AN INJECTION DEVICE
Abstract:
A cartridge (1) for an injection device carries a code represented by a number of bars (2, 3, 4, 5) mainly perpendicular to the axis of the cartridge. The bars (2, 3, 4, 5) are mainly transparent and are each along its whole length provided with an optical grating which diffracts and reflects light impinging the surface carrying the code so that a minor part of this light is reflected from the surface of the bar as a set of light beams of which beams at least one is detected for the indication of the presence of the bar when said bar passes a reading light field. The reflections from the bars may be interpreted as representing '1's and '0's in a binary code.