Selective printing of raised information by electrography

• US 20080159786A1
• Filed: 12/27/2006
• Published: 07/03/2008
• Est. Priority Date: 12/27/2006
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Gomes, Earl Gregory, Chowdry, Arun, Tai, Hwai-Tzuu, Aslam, Muhammed, Tyagi, Dinesh, Tombs, Thomas Nathaniel
• Granted Patent: US 8,358,957 B2
• Time in Patent Office: Days
• US Class Current: 399/222
• CPC Class Codes: G03G 15/221 Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters
• CPC Class Codes: G03G 15/321 by charge transfer onto the recording material in accordance with the image
• CPC Class Codes: G09B 21/02 Devices for Braille writing typewriters for Braille B41J3/32

Abstract

Electrographic printing wherein raised information, with a distinct tactile feel, can be printed by electrographic techniques. Such electrographic printing comprises the steps of forming a desired print image, electrographically, on a receiver member utilizing standard size marking particles; and in an area of the formed print image, where desired tactile feel, raised information is to be formed, selectively forming such tactile feel, raised information utilizing marking particles of a substantially larger size than the standard size marking particles of the desired print image.

Claims

1. Electrographic printing wherein raised information, with a distinct tactile feel, can be printed by electrographic techniques, said printing comprising the steps of:

forming a desired print image, electrographically, on a receiver member utilizing standard size marking particles; and

in an area of the formed print image, where desired tactile feel, raised information is to be formed, selectively forming such tactile feel, raised information utilizing marking particles built up to a substantially larger size than the standard size marking particles of the desired print image.

2. Electrographic printing according to claim 1 wherein the desired print image is formed of pigmented marking particles, and the marking particles for tactile feel, raised information are non-pigmented.

3. Electrographic printing according to claim 1 wherein the coverage by marking particles for a tactile feel, raised information is at least 2 mg/cm².

4. Electrographic printing according to claim 1 wherein standard size marking particles have a volume average diameter of less than 9 μ

m, and the marking particles for tactile feel, raised information are on the order of a volume average diameter of 12-30 μ

m.

5. Electrographic printing according to claim 1 wherein the total marking particle stack height is at least 20 μ

m in order to yield the desired tactile feel.

6. Electrographic printing according to claim 1 wherein the tactile feel, raised information is used for the following:

Braille printing, providing security features, printing raised letter information such as business cards or stationary, or providing a surface characteristic for the print receiver member.

7. Electrographic printing according to claim 1 wherein the tactile feel, raised information imparts a periodic texture to the print image.

8. Electrographic printing according to claim 1 wherein the raised information is screened using a low frequency screening algorithm.

9. Electrographic printing according to claim 1 wherein one or more electrographic process set-points, control parameters or algorithms, are set to predetermined values when printing tactile feel, raised information, that are different from electrographic process set-points, control parameters or algorithms, used when printing an image without tactile feel, raised information.

10. Electrographic printing of distinct tactile feel, raised information, said electrographic printing comprising the steps of:

forming a desired print image, electrographically, on a receiver member utilizing standard size marking particles; and

in an area of the formed print image, where desired tactile feel, raised information is to be formed, selectively forming such tactile feel, raised information by laying down multiple layers of marking particles.

11. Electrographic printing method according to claim 10 wherein where desired tactile feel, raised information is to be formed, selectively forming such tactile feel information using variable data such that every page produced can contain unique information.

12. Electrographic printing according to claim 10 wherein a new color profile for the production of the image with pigmented marking particles is built based on the tactile feel, raised information.

13. Electrographic printing according to claim 10 wherein at the portion of the print where tactile feel, raised information is to be formed, selectively forming such raised information using object type information such that only the desired object types have the desired tactile feel.

14. A print on a receiver member, said print exhibiting a tactile feel for raised information, comprising:

marking particle coverage on said receiver member providing a desired print image, and marking particle coverage, in areas of said receiver member where tactile feel, raised information is desired of a stack height of at least 20 μ

m in order to yield the desired tactile feel.

15. The print on the receiver member according to claim 14 wherein tactile feel, raised information is in the foreground of such print and represents at least a part of the printed image.

16. The print on the receiver member according to claim 14 wherein tactile feel, raised information is in the background of such print and represents a surface characteristic for the print receiver member.

17. The print on the receiver member according to claim 14 wherein tactile feel, raised information is in the foreground and background of such print.