Method and device for inspecting or correcting a direct print on containers with a relief-like surface contour

Patent metadata

Field	Value
Publication number	US-9649856-B2
Application number	US-201314404107-A
Country	US
Kind code	B2
Filing date	Apr 30, 2013
Priority date	Jun 1, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

Method for inspecting a direct print on containers with a relief-like surface contour, where the relief-like surface contour is at least partially printed onto, the direct print applied onto the relief-like surface contour is, with an inspection device, inspected in terms of its quality and/or position.

First claim

The invention claimed is:

1. A method for inspecting a direct print on a container with a relief-like surface contour, wherein said direct print is at least partially printed onto said relief-like surface contour, the method comprising:
detecting, in a first step, using an inspection device, actual contour characteristics of said relief-like surface contour, the actual contour characteristics comprising a three-dimensional contour/shape of said relief-like surface contour;
detecting, in a second step, using the inspection device, actual printing characteristics of said direct print on said container; and
matching, using the inspection device, the actual contour characteristics with the actual printing characteristics;
wherein matching the actual contour characteristics with the actual printing characteristics comprises superimposing, using the inspection device, one of the actual contour characteristics and the actual printing characteristics onto the other of the actual contour characteristics and the actual printing characteristics; and
wherein said direct print is, in terms of its quality and/or position relative to the actual contour characteristics, inspected with said inspection device.

2. The method for inspecting a direct print on a container according to claim 1 , wherein said containers are, prior to printing, attached in a fixed position to holding devices, wherein said contour characteristics of said relief-like surface contour are detected prior to printing and said printing characteristics are detected after printing.

3. The method for inspecting a direct print on a container according to claim 1 , said direct print being, after inspection, corrected with a correction print.

4. The method for inspecting a direct print on a container according to claim 1 , and transmitting a correction signal for calibrating said direct print from said inspection device to a direct printing device.

5. The method for inspecting a direct print on a container according to claim 1 , and said direct print is performed sequentially by print heads with different printing inks, and inspecting at least one of an intermediate result of said direct print between at least two print heads, or the overall result after printing all printing inks.

6. The method for inspecting a direct print on a container according to claim 1 , wherein partial surfaces of said relief-like surface contour with a tangent that is slanted relative to the basic shape of said container are aligned perpendicular to an inspection axis.

7. A method for correcting a direct print on containers with a relief-like surface contour, wherein said direct print is at least partially printed onto said relief-like surface contour with a direct printing device, the method comprising: following an inspection of the direct print with the method for inspecting a direct print on a container according to claim 1 , correcting the direct print by applying a correction print onto said container.

8. The method for correcting a direct print according to claim 7 , wherein said correction print is applied with a separate correction printing device or said direct printing device onto said container.

9. The method for correcting a direct print according to claim 7 , wherein said direct print is cured in sections and non-cured sections are corrected.

10. The method for correcting a direct print according to claim 7 , further comprising removing at least a portion of said direct print on said container when the inspection determines that an error has been made.

11. A device for inspecting a direct print on a container with a relief-like surface contour, the device comprising:
a direct printing device for at least partially printing said direct print onto said relief-like surface contour;
at least one camera for detecting actual printing characteristics of said direct print on said container;
at least one of a detection unit for relief-like surface contours, a camera, or a triangulation unit for detecting actual contour characteristics of said relief-like surface contour, the actual contour characteristics comprising a three-dimensional contour/shape of said relief-like surface contour; and
at least one inspection device for inspecting said direct print in terms of at least one of its quality and position relative to the actual contour characteristics by matching the actual printing characteristics with the actual contour characteristics, wherein matching the actual contour characteristics with the actual printing characteristics comprises superimposing, using the inspection device, one of the actual contour characteristics and the actual printing characteristics onto the other of the actual contour characteristics and the actual printing characteristics.

12. The device for inspecting a direct print according to claim 8 , where said at least one camera detects printing characteristics of said direct print and said contour characteristics of said relief-like surface contour.

13. The device for inspecting a direct print according to claim 11 , where at least one of said containers, said direct printing device, or said at least one inspection device is pivotably arranged.

14. The device for inspecting a direct print according to claim 11 , where said at least one inspection device comprises at least one layer thickness measuring device which measures the thickness of at least one ink layer.

15. The device for inspecting a direct print according to claim 11 , wherein holding devices are provided to receive said containers in a fixed position.

16. A device for inspecting a direct print on a container with a relief-like surface contour according to claim 11 , further comprising a correction device configured to correct said direct print following an inspection of the direct print.

17. The device for inspecting a direct print on a container with a relief-like surface contour according to claim 16 , further comprising a device for removing printing ink applied onto said container.

18. The device for inspecting a direct print on a container with a relief-like surface contour according to claim 16 , where said device comprises a transport diverter.

19. The device for inspecting a direct print on a container with a relief-like surface contour according to claim 16 , where said device comprises a carousel having an odd number of container holders.

Assignees

• Krones Ag

Inventors

• Lindner Peter
• Winzinger Frank
• Grosch Sabine

Classifications

• B41J25/308

  with print gap adjustment mechanisms · CPC title

• G01N21/9045

  Inspection of ornamented or stippled container walls · CPC title

• B41M1/40

  Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks {(sublimation or volatilisation of pre-printed design B41M5/035)} · CPC title

• B41J3/4073 Primary

  Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects (B41J3/283, B41J3/286 take precedence; building up a 3D object using individual droplets from jetting heads B29C64/112) · CPC title

• G01N21/909

  in opaque containers or opaque container parts, e.g. cans, tins, caps, labels · CPC title