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1. US20020056756 - Thermochromic bar code

Office
United States of America
Application Number 09453545
Application Date 03.12.1999
Publication Number 20020056756
Publication Date 16.05.2002
Grant Number 6685094
Grant Date 03.02.2004
Publication Kind B2
IPC
G06K 7/10
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7Methods or arrangements for sensing record carriers
10by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
G06K 19/06
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19Record carriers for use with machines and with at least a part designed to carry digital markings
06characterised by the kind of the digital marking, e.g. shape, nature, code
CPC
G06K 19/06046
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19Record carriers for use with machines and with at least a part designed to carry digital markings
06characterised by the kind of the digital marking, e.g. shape, nature, code
06009with optically detectable marking
06046Constructional details
G06K 19/06018
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19Record carriers for use with machines and with at least a part designed to carry digital markings
06characterised by the kind of the digital marking, e.g. shape, nature, code
06009with optically detectable marking
06018one-dimensional coding
Inventors Cameron, Jon
Agents Handley, Mark W.
Chauza & Handley, L.L.P.
Priority Data 08986287 06.12.1997 US
09453545 03.12.1999 US
Title
(EN) Thermochromic bar code
Abstract
(EN)

A bar code (10) incorporating thermochromic materials in selected modules (20) such that its code changes with temperature. Below a specified temperature, the bar code (10) displays a first code. Above this temperatures, the bar code (10) displays a second code. The bar code (10) is printed with conventional printing equipment onto conventional printing media, and is scanned with conventional bar code scanning equipment.


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