Printed document and method of determining the print quality of a printed document

• US 6,185,001 B1
• Filed: 02/01/1999
• Issued: 02/06/2001
• Est. Priority Date: 02/01/1999
• Status: Expired due to Fees

• Current Assignee: The Standard Register Company (Middleby Corporation)
• Original Assignee: The Standard Register Company (Middleby Corporation)
• Inventors: Mowry, William H. Jr., Riccardella, Joseph V., Webendorfer, Stephen D.
• Primary Examiner(s): Coles, Edward L.
• Assistant Examiner(s): WALLERSON, MARK E
• Application Number:
  US09/241,241
• Time in Patent Office: 736 Days
• Field of Search: 358/1.1, 358/1.2, 358/1.3, 358/1.11, 358/1.14, 358/1.15, 358/1.18, 358/296, 358/298, 358/504, 358/406, 347/19, 347/178, 347/179, 399/49, 399/58, 399/74, 355/40, 355/61, 382/112, 382/215, 382/216, 382/256, 382/306, 382/309
• US Class Current: 358/1.2
• CPC Class Codes: G06K 15/00 Arrangements for producing a permanent visual presentation of the output data , e.g. computer output printersprinting or plotting combined with another operation, e.g. with conveying, G06K17/00
• CPC Class Codes: H04N 1/00002 Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for error detection, error correction or monitoring in digital computers or digital computer components G06F11/00
• CPC Class Codes: H04N 1/00015 Reproducing apparatus
• CPC Class Codes: H04N 1/00031 Testing, i.e. determining the result of a trial H04N1/00029 takes precedence; using test signals for transmission mode changing H04N2201/33371
• CPC Class Codes: H04N 1/00045 using a reference pattern designed for the purpose, e.g. a test chart

Abstract

A printed document includes a print quality indicator on the print surface of the document in the primary printing area. The image of the print quality indicator has a plurality of printed targets, each of the targets defining an unprinted area. The dimensions of the unprinted areas of the targets varying among the targets. The print quality of the printed document is determined by noting which of the unprinted areas in the print quality indicator printed on the document are not clearly free of ink upon close visual inspection of the document. Each target is made up of a printed circle, having a specified outer diameter, a specified line weight, and a specified inner diameter, and a printed circular dot, having a specified diameter, positioned centrally within the printed circle. The specified diameter of the printed circular dot is less than the specified inner diameter of the printed circle such that the printed circular dot and the printed circle define an annular unprinted area there between.

Claims

1. A printed document including a print quality indicator on a print surface of the document in a primary printing area, comprising:

a document substrate defining a print surface,

print images printed on the print surface, and

a print quality indicator printed on the print surface in the primary printing area, the image of the print quality indicator comprising a plurality of printed targets, each of the targets defining an unprinted area, dimensions of the unprinted areas of the targets varying among the targets, wherein the print quality of the printed document may be determined by noting which of the unprinted areas in the print quality indicator printed on the document are not clearly free of ink upon close visual inspection of the document.

2. A printed document according to claim 1 in which the print images and the image of the print quality indicator originate on a photographic negative and a desired image of each target comprises:

a printed circle having a specified outer diameter, a specified line weight, and a specified inner diameter, and

a printed circular dot having a specified diameter positioned centrally within the printed circle, the specified diameter of the printed circular dot being less than the specified inner diameter of the printed circle such that the printed circular dot and the printed circle define there between an unprinted area, the unprinted area being generally annular in shape.

3. A printed document according to claim 2 in which the specified outer diameter of each printed circle is substantially 0.010 inch, and in which the specified inner diameter of each printed circle is substantially 0.006 inch.

4. The printed document according to claim 3 in which the image of the print quality indicator comprises nine targets, the targets having printed circular dots of substantially the following diameters:

0.0038 inch, 0.0035 inch, 0.0032 inch, 0.0028 inch, 0.0025 inch, 0.0022 inch, 0.0019 inch, 0.0016 inch, and 0.0013 inch, whereby the identity of the target having the largest printed circular dot in which the unprinted area is free of ink on the printed document provides an objective indication of the sharpness or print quality of the print images printed on the print surface.

5. The printed document according to claim 4 in which the targets on the printed document are observed under substantially 30×

magnification to determine the identity of the target having the largest printed circular dot in which the unprinted area is free of ink.

6. The printed document according to claim 1 in which the targets on the printed document are arranged in a single row and intermingled with the images printed on the print surface.

7. The printed document according to claim 1 in which the targets on the printed document are arranged in rows and columns forming a generally rectangular array and intermingled with the images printed on the print surface.

8. The printed document according to claim 1 in which the print quality indicator comprises nine targets, and in which the nine targets are arranged in a row, surrounded by the print images on the print surface.

9. The printed document according to claim 8 in which the nine targets occupy an area approximately 0.010 inch by 0.090 inch.

10. The printed document according to claim 1 in which the targets are sufficiently small so as not to be readily apparent upon casual inspection of the print surface without the aid of magnification.

11. A printed document including a print quality indicator on a print surface of the document in a primary printing area, comprising:

a document substrate defining a print surface,

print images printed on the print surface, and

a print quality indicator printed on the print surface in the primary printing area, the image of the print quality indicator comprising a plurality of printed targets, the targets defining generally annular unprinted areas of varying dimensions, wherein the print quality of the printed document may be determined by noting which of the annular unprinted areas in the print quality indicator printed on the document are not clearly free of ink upon close visual inspection of the document.

12. The printed document of claim 11 in which the print images and the image of the print quality indicator originate on a photographic negative and the desired image of each target comprises a printed circle and a printed dot within the printed circle, the circle and dot defining the generally annular unprinted area there between.

13. The printed document of claim 12 in which the printed circles making up the printed targets are of substantially uniform size, and the printed dots making up the printed targets are of varying sizes.

14. The printed document of claim 11 in which the targets are printed in the same area on the print surface as the print images.

15. A method of determining the print quality of a printed document, comprising the steps of:

providing a print quality indicator image including a plurality of printed targets, each of the targets defining an unprinted area, dimensions of the unprinted areas of the targets varying among the targets,

providing a document substrate defining a print surface,

printing print images on the print surface in a primary printing area, and printing the print quality indicator image on the print surface in the primary printing area, and

visually inspecting the document and noting which of the unprinted areas in the print quality indicator printed on the document are not clearly free of ink.

16. The method of claim 15 in which the step of providing a print quality indicator image includes the step of providing said print images and said print quality indicator image on a photographic negative, and in which said print quality indicator image includes a plurality of printed targets, each of the targets includes a printed circle having a specified outer diameter, a specified line weight, and a specified inner diameter, and a printed circular dot having a specified diameter positioned centrally within the printed circle, the specified diameter of the printed circular dot being less than the specified inner diameter of the printed circle such that the printed circular dot and the printed circle define there between an unprinted area, the unprinted area being generally annular in shape.

17. The method of claim 16 in which the specified outer diameter of each printed circle is substantially 0.010 inch, and in which the specified inner diameter of each printed circle is substantially 0.006 inch.

18. The method of claim 17 in which the image of the print quality indicator comprises nine targets, the targets having printed circular dots of substantially the following diameters:

0.0038 inch, 0.0035 inch, 0.0032 inch, 0.0028 inch, 0.0025 inch, 0.0022 inch, 0.0019 inch, 0.0016 inch and 0.0013 inch.

19. The method of claim 18 in which the identity of the target having the largest printed circular dot in which the unprinted area is free of ink on the printed document provides an objective indication of the sharpness or print quality of the print images printed on the print surface.

20. The method of claim 19 in which the step of visually inspecting the document and noting which of the unprinted areas in the print quality indicator printed on the document are not clearly free of ink includes the step of observing the targets on the printed document under substantially 30×

magnification to determine the identity of the target having the largest printed circular dot in which the unprinted area is free of ink.

21. The method of claim 15 in which in which the targets on the printed document are arranged in a single row, intermingled with the images printed on the print surface.

22. The method of claim 15 in which the targets on the printed document are arranged in rows and columns forming a generally rectangular array and intermingled with the images printed on the print surface.

23. The method of claim 15 in which the print quality indicator image comprises nine targets, and in which the targets are arranged in a row, surrounded by the print images on the print surface.

24. The method of claim 23 in which the nine targets occupy an area approximately 0.010 inch by 0.090 inch.

25. The method of claim 15 in which the targets are sufficiently small so as not to be readily apparent upon casual inspection of the print surface without the aid of magnification.

26. The method of claim 15 in which the step of printing print images on the print surface, and printing the print quality indicator image on the print surface comprises the step of printing print images and the print quality indicator image on the print surface substantially simultaneously.

27. The method of claim 15 in which the step of printing print images on the print surface, and printing the print quality indicator image on the print surface comprises the step of printing at least some of the print images and the print quality indicator image on the print surface substantially simultaneously, while printing at least some print images on the print surface before printing the print quality indicator on the print surface.

28. The method of claim 15 in which the step of printing print images on the print surface, and printing the print quality indicator image on the print surface comprises the step of printing at least some of the print images and the print quality indicator image on the print surface substantially simultaneously, while printing at least some print images on the print surface after printing the print quality indicator on the print surface.