Method and apparatus for the circumferential printing onto individual bottles in a run of bottles where the individual bottles in the run have at least one varying dimension due to manufacturing tolerances, the method and apparatus providing more consistent artwork on individual containers in the run of containers

• US 8,256,854 B2
• Filed: 02/13/2009
• Issued: 09/04/2012
• Est. Priority Date: 08/16/2006
• Status: Active Grant

• Current Assignee: KHS GmbH (Salzgitter AG)
• Original Assignee: KHS GmbH (Salzgitter AG)
• Inventors: Till, Volker
• Primary Examiner(s): UHLENHAKE, JASON S
• Application Number:
  US12/370,667
• Publication Number:
  US 20090205516A1
• Time in Patent Office: 1,299 Days
• Field of Search: 347/2, 347/4, 347/8, 347/101, 535/44
• US Class Current: 347/2
• CPC Class Codes: B41F 17/18 on curved surfaces of articles of varying cross-section, e.g. bottles, lamp glasses
• CPC Class Codes: B41F 17/22 by rolling contact
• CPC Class Codes: B41J 3/00 Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
• CPC Class Codes: B41J 3/4073 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 Class Codes: B41J 3/40733 Printing on cylindrical or rotationally symmetrical objects, e. g. on bottles

Abstract

A method and apparatus for the circumferential printing onto individual bottles in a run of bottles where the individual bottles in the run have at least one varying dimension due to manufacturing tolerances, the method and apparatus providing more consistent artwork on individual containers in the run of containers. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Claims

1. A method of circumferentially printing onto containers, such as bottles, said method comprising the steps of:

storing artwork with associated angle markings in a control unit, which stored angle markings correspond to angular positions about the circumference of each container; and

performing, for each container, a relative rotational movement of said container and at least one print head and applying said stored artwork on said container according to said stored angle markings and said angular positions, and thus producing printed artwork having a circumferential size and/or height according to the circumferential size and/or height of said container, and thus compensating for container tolerances between containers.

2. The method according to claim 1, wherein said stored artwork is supplemented exclusively by said stored angle markings regarding its expansion or contraction in the circumferential direction, so that said stored artwork is applied to the container on the basis of said angular positions in the circumferential direction.

3. The method according to claim 2, wherein said method comprises one of:

fixing said at least one print head at a specified distance from the container; and

adjusting the distance between said at least one print head and the container.

4. The method according to claim 3, wherein said stored artwork is applied to the container without overlap.

5. The method according to claim 4, wherein said step of applying said stored artwork comprises adjusting distances between individual dots of color in the circumferential direction and/or in the vertical direction as a function of the size and shape of the container.

6. The method according to claim 5, wherein said step of adjusting distances between individual dots of color comprises one of:

varying the distance between the dots of color or fixing the distance between the dots of color, in the circumferential direction and/or in the vertical direction.

7. The method according to claim 6, wherein said stored artwork is applied to the container in a vertical direction substantially perpendicular to the circumferential direction and is expanded or contracted in height according to the height of the container.

8. The method according to claim 7, wherein said printing comprises circumferentially printing for 360 degrees.

9. The method according to claim 8, wherein said step of producing printed artwork comprises producing printed artwork according to solely the circumferential size of said container, and thus compensating for container tolerances between containers with respect to solely circumferential size.

10. The method according to claim 1, wherein said method comprises one of:

fixing said at least one print head at a specified distance from the container; and

adjusting the distance between said at least one print head and the container.

11. The method according to claim 10, wherein said stored artwork is applied to the container without overlap.

12. The method according to claim 11, wherein said step of producing printed artwork comprises producing printed artwork according to solely the circumferential size of said container, and thus compensating for container tolerances between containers with respect to solely circumferential size.

13. The method according to claim 1, wherein:

said steps of performing a relative rotational movement, applying said stored artwork, and thus producing printed artwork are performed for a first container and a subsequent, second container, which second container differs from said first container in circumferential size and/or height due to container tolerances; and

said step of producing printed artwork on said second container comprises producing printed artwork having a circumferential size and/or height which is expanded or contracted in a circumferential direction and/or a vertical direction with respect to said printed artwork on said first container, and thus compensating for container tolerances between containers.

14. The method according to claim 13, wherein said step of producing printed artwork comprises producing printed artwork according to solely the circumferential size of said container, and thus compensating for container tolerances between containers with respect to solely circumferential size.

15. A printing arrangement for performing the method according to claim 1 of circumferentially printing onto containers, such as bottles, said arrangement comprising:

a control unit being configured to store artwork with associated angle markings, which stored angle markings correspond to angular positions about the circumference of a container;

a container support and at least one print head, wherein at least one of;

said container support and said at least one print head is movable;

said control unit being configured to;

control said container support and said at least one print head to perform, for each of a plurality of containers, a relative rotational movement of a container and said at least one print head; and

activate said at least one print head to apply said stored artwork on a container according to said stored angle markings and angular positions to produce printed artwork having a circumferential size and/or height according to the circumferential size and/or height of a container to compensate for container tolerances between containers.

16. The printing arrangement according to claim 15, wherein said printing arrangement comprises an adjustable holder configured to hold said at least one print head a predetermined distance from a container.

17. The printing arrangement according to claim 16, wherein said printing arrangement comprises a sensor configured to measure the distance of said at least one print head from a container.

18. The printing arrangement according to claim 17, wherein said control unit is configured to analyze the measurements of said sensor and utilize the measurements to adjust the position of said holder and said at least one print head to promote a constant and controlled distance between said at least one print head and a container to optimize quality of the printed image.

19. The printing arrangement according to claim 18, wherein said printing arrangement further comprises a rotational arrangement being configured to perform a relative rotational movement between a container and said at least one print head during application of said stored artwork.

20. The printing arrangement according to claim 15, wherein said control unit is configured to activate said at least one print head to apply said stored artwork on a container according to said stored angle markings and angular positions to produce printed artwork according to solely the circumferential size of a container to compensate for container tolerances between containers with respect to solely circumferential size.