Method Of Enabling Data Entry Using Substrate Comprising IR-Absorbing Dye

• US 20090266877A1
• Filed: 07/09/2009
• Published: 10/29/2009
• Est. Priority Date: 07/05/2005
• Status: Active Grant

• Current Assignee: BASF SE
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Indusegaram, Sutharsiny, Vonwiller, Simone Charlotte, Starling, Scott Matthew, Ridley, Damon Donald, Gonzaga, Graciel
• Granted Patent: US 7,946,701 B2
• Time in Patent Office: Days
• US Class Current: 235/375
• CPC Class Codes: C09B 47/0676 having nitrogen atom(s) linked directly to the skeleton
• CPC Class Codes: C09B 47/30 Metal-free phthalocyanines
• CPC Class Codes: C09D 11/328 characterised by dyes
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Abstract

A method of enabling entry of data into a computer system via a printed substrate. The substrate has a surface containing human-readable information and machine-readable coded data. The coded data is indicative of an identity of the substrate and of a plurality of reference points on the surface. The method includes the steps of: operatively positioning a sensing device relative to the surface and sensing the coded data; generating indicating data using the sensed coded data; and sending the indicating data to a computer system. The coded data comprises an IR-absorbing dye having a nitrogen-substituted phthalocyanine.

Claims

1. A method of enabling entry of data into a computer system via a printed substrate, the substrate having a surface containing human-readable information and machine-readable coded data, the coded data being indicative of an identity of the substrate and of a plurality of reference points on the surface, the method including the steps of:

operatively positioning a sensing device relative to the surface and sensing at least some of the coded data;

generating indicating data using the sensed coded data, said indicating data regarding the identity of the form and a position of the sensing device relative to the surface;

sending the indicating data to a computer system, thereby enabling the computer system to interpret the indicating data as it relates to the printed substrate,

wherein said coded data comprises an IR-absorbing dye of formula (IV) or (V);

2. The method of claim 1, wherein at least one W is a sulfonic acid or sulfonic acid salt of formula —

SO₃Z,

wherein;

Z is H, Li, Na, K or N⁺(R^m)(Rⁿ)(R^s)(R^t); and

R^m, Rⁿ, R^s, R^t may be the same or different and are independently selected from the group consisting of;

H, C_1-8 alkyl, C_6-12 arylalkyl and C_6-12 aryl.

3. The method of claim 1, wherein M is SnCl₂, V═

O or Ga(OH).

4. A substrate for enabling entry of data into a computer system, said substrate having a dye disposed thereon, wherein said dye is of formula (IV) or (V):

5. The substrate of claim 4, wherein said dye is disposed in the form of coded data.

6. The substrate of claim 4, wherein said substrate has a surface containing human-readable information and machine-readable coded data.

7. The substrate of claim 6, wherein the machine-readable coded data is indicative of an identity of the substrate and of a plurality of reference points on the surface.