Method for manufacturing pre-inked stamps

• US 5,460,757 A
• Filed: 12/29/1993
• Issued: 10/24/1995
• Est. Priority Date: 12/29/1993
• Status: Expired due to Fees

• Current Assignee: Topstamp Incorporated
• Original Assignee: Topstamp Incorporated
• Inventors: Hedgecoth, David L.
• Primary Examiner(s): Vargot, Mathieu D.
• Application Number:
  US08/174,716
• Time in Patent Office: 664 Days
• Field of Search: 219/121.67, 219/121.71, 219/121.72, 219/121.69, 219/121.73, 264/22, 264/25, 264/152, 264/138, 264/162, 264/28, 435/174.4, 364/474.08
• US Class Current: 264/400
• CPC Class Codes: B23K 2103/30 Organic material
• CPC Class Codes: B23K 2103/42 Plastics B23K2103/16 takes precedence
• CPC Class Codes: B23K 2103/50 Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
• CPC Class Codes: B29C 2035/0838 using laser
• CPC Class Codes: B29C 59/16 by wave energy or particle radiation , e.g. infrared heating B29C59/007 takes precedence
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: B41C 1/02 Engraving; Heads therefor recording on record carriers, heads therefor G11B
• CPC Class Codes: B44B 3/009 using a computer control means
• CPC Class Codes: B44B 7/007 using a computer control means
• CPC Class Codes: G05B 19/4097 characterised by using design data to control NC machines, e.g. CAD/CAM G05B19/4093 takes precedence
• CPC Class Codes: G05B 2219/45165 Laser machining
• CPC Class Codes: G05B 2219/45212 Etching, engraving, sculpturing, carving
• CPC Class Codes: G05B 2219/45227 Stamp making
• CPC Class Codes: G05B 2219/49322 Cool to solidify material before machining it

Abstract

The method (10) of the present invention includes a first step of designing an image to be reproduced by the stamp pad (12). A pre-inked rubber material (14) derived from an ink and plasticizer premix is then super-cooled to immobilize the ink constituents (28) and harden the pre-inked material (14). A controller (52) then processes the information communicated from the computer (50) in order to control the operation of an engraver (54) such as a laser beam generator or a pantograph. The engraved material (12) is then warmed to room temperature and affixed to an appropriate handle. Alternatively, the selected image (38) is accomplished on the top surface of the stamp pad (12) during the curing procedure. In this procedure, the premix material (22) is heated from the bottom surface (30) to a curing temperature up to a selected height. A heat source (62) is applied to the image surface (18) such as to raise the material directly below to an appropriate curing temperature level to a selected depth.

Claims

1. A method for manufacturing a pre-inked stamp, said method comprising the steps of:

creating an image, said image being associated with a set of electronic data;

conditioning a workpiece to a non-ambient temperature, said workpiece including at least an ink constituent and a base material;

sending said set of electronic data to a controller;

processing said set of electronic data by said controller; and

forming a mirror image of said image on a top surface of said workpiece by a device controlled by said controller.

2. The method of claim 1 wherein said non-ambient temperature is below a freezing point of said ink constituent, said workpiece comprising a cured material.

3. The method of claim 2 wherein said step of forming said mirror image of said image on said top surface of said workpiece is performed by etching.

4. The method of claim 3 wherein said device is a laser beam generator.

5. The method of claim 3 wherein said device is a pantograph.

6. The method of claim 3 wherein said device is a computer controlled engraver.

7. The method of claim 2 wherein said step of forming said mirror image of said image on said top surface of said workpiece is performed by cutting.

8. The method of claim 7 wherein said device is a laser beam generator.

9. A method for manufacturing a pre-inked stamp, said method comprising the steps of:

creating an image, said image being associated with a set of electronic data;

conditioning a workpiece to a non-ambient temperature, said workpiece including at least an ink constituent and a base material, said non-ambient temperature being below a freezing point of said ink constituent, said workpiece comprising a cured material;

sending said set of electronic data to a controller;

processing said set of electronic data by said controller; and

forming a mirror image of said image on a top surface of said workpiece by a device controlled by said controller.

10. The method of claim 13 wherein said step of forming said mirror image of said image on said top surface of said workpiece is performed by etching.

11. The method of claim 10 wherein said device is a laser beam generator.

12. The method of claim 9 wherein said device is a pantograph.

13. The method of claim 9 wherein said step of forming said mirror image of said image on said top surface of said workpiece is performed by cutting.

14. The method of claim 13 wherein said device is a laser beam generator.

15. A method for manufacturing a pre-inked stamp, said method comprising the steps of:

creating an image, said image being associated with a set of electronic data;

conditioning a workpiece to a non-ambient temperature, said workpiece including at least an ink constituent and a base material, said non-ambient temperature being a curing temperature of said workpiece, said workpiece initially being substantially uncured;

sending said set of electronic data to a controller;

processing said set of electronic data by said controller;

forming a mirror image of said image on a top surface of said workpiece by a device controlled by said controller, said step of forming said mirror image of said image on said top surface of said workpiece being performed by applying a first heat source to a bottom surface of said workpiece and applying a second heat source to said top surface proximate said mirror image, said first heat source achieving said curing temperature throughout a portion of said workpiece from said bottom surface to a depth of said workpiece, said second heat source achieving said curing temperature throughout said workpiece immediately below said mirror image and extending at least to said depth such as to form a cured portion, said cured portion comprising said pre-inked stamp, remaining portions of said workpiece being above said depth and not immediately below said mirror image being substantially uncured, said second heat source comprising a laser beam generator; and

washing said remaining portion of said workpiece from said cured portion.

16. A method for manufacturing a pre-inked stamp, said method comprising the steps of:

creating an image, said image being associated with a set of electronic data;

conditioning a workpiece to a non-ambient temperature, said non-ambient temperature being a curing temperature of said workpiece, said workpiece initially being substantially uncured, said workpiece including at least an ink constituent and a base material;

sending said set of electronic data to a controller;

processing said set of electronic data by said controller; and

forming a mirror image of said image on a top surface of said workpiece by a device controlled by said controller.

17. The method of claim 16 wherein said step of forming said mirror image of said image on said top surface of said workpiece is performed by applying a first heat source to a bottom surface of said workpiece and applying a second heat source to said top surface proximate said mirror image, said first heat source achieving said curing temperature throughout a portion of said workpiece from said bottom surface to a depth of said workpiece, said second heat source achieving said curing temperature throughout said workpiece immediately below said mirror image and extending at least to said depth such as to form a cured portion, said cured portion comprising said pre-inked stamp, remaining portions of said workpiece being above said depth and not immediately below said mirror image being substantially uncured.

18. The method of claim 17, after said step of forming said mirror image of said image on said top surface of said workpiece, further comprising the step of washing said remaining portion of said workpiece from said cured portion.

19. The method of claim 17 wherein said second heat source is a laser beam generator.