System for interacting with analog-printed substrate

• US 7,841,537 B2
• Filed: 06/10/2009
• Issued: 11/30/2010
• Est. Priority Date: 10/16/2006
• Status: Expired due to Fees

• Current Assignee: BASF SE
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia, Vonwiller, Simone Charlotte, Starling, Scott Matthew, Ridley, Damon Donald
• Primary Examiner(s): TRAIL, ALLYSON NEEL
• Application Number:
  US12/482,396
• Publication Number:
  US 20090242642A1
• Time in Patent Office: 538 Days
• Field of Search: 235/491, 235/462.01, 235/488, 347/104
• US Class Current: 235/491
• CPC Class Codes: C07D 487/22 in which the condensed system contains four or more hetero rings
• CPC Class Codes: C09B 47/0678 having-COOH or -SO3H radicals or derivatives thereof directly linked to the skeleton
• CPC Class Codes: C09B 69/02 Dyestuff salts, e.g. salts of acid dyes with basic dyes for Na, K or NH4+ salts or for chlorides, sulfates or chlorozincates, see the relevant dye groups
• CPC Class Codes: C09D 11/037 characterised by the pigment

Abstract

A system for interacting with a coded substrate. The system comprises a substrate having human-readable information and machine-readable coded data disposed thereon and a sensing device for reading the machine-readable coded data. The coded data comprises an IR-absorbing phthalocyanine dye having sulfonate groups. A counterion of each sulfonate group is a phosphonium cation.

Claims

1. A system for interacting with a coded substrate, said system comprising:

a substrate having human-readable information and machine-readable coded data disposed thereon or therein; and

a sensing device for reading the machine-readable coded data,

wherein said coded data comprises an IR-absorbing phthalocyanine dye comprising one or more sulfonate groups, wherein a counterion of at least one sulfonate group is a phosphonium cation,

and wherein;

each phosphonium cation is of formula;

P⁺(R^m)(Rⁿ)(R^s)(R^t);

each of R^m, Rⁿ, R^s and R^t is independently selected from the group consisting of;

C_1-30 alkyl, C_5-12 aryl and C_5-30 arylalkyl; and

at least one of R^m, Rⁿ, R^s and R^t comprises more than 4 carbon atoms.

2. The system of claim 1, wherein said phthalocyanine dye is contained in a solvent-based or oil-based ink.

3. The system of claim 1, wherein said substrate is printed by an analog printing process.

4. The system of claim 1, wherein said substrate is a printed page.

5. The system of claim 1, wherein said substrate is a label or packaging for a product item.

6. The system of claim 1, wherein said phthalocyanine dye comprises a plurality of sulfonate groups.

7. The system of claim 6, wherein said phthalocyanine dye comprising a corresponding plurality of phosphonium counterions.

8. The system of claim 1, wherein said phthalocyanine dye is a naphthalocyanine dye.

9. The system of claim 1, wherein said phthalocyanine dye is of formula (I):

10. The system of claim 9, wherein at least three of R^m, Rⁿ, R^s and R^t comprise more than 4 carbon atoms.

11. The system of claim 9, wherein at least three of R^m, Rⁿ, R^s and R^t are independently selected from a C_6-30 alkyl group.

12. The system of claim 9, wherein R¹ and R² are both hydrogen.

13. The system of claim 9, wherein M is Ga(OH).

14. The system of claim 1, wherein said sensing device comprises an image sensor with an IR filter.

15. The system of claim 14, wherein said sensing device is an optically imaging pen.

16. The system of claim 15, wherein said pen has a nib for interacting with the substrate.