Printing system and method

• US 10,596,839 B2
• Filed: 08/15/2017
• Issued: 03/24/2020
• Est. Priority Date: 11/15/2012
• Status: Active Grant

• Current Assignee: Velox-PureDigital Ltd.
• Original Assignee: Velox-PureDigital Ltd.
• Inventors: Cofler, Marian
• Primary Examiner(s): Thies, Bradley W
• Application Number:
  US15/677,333
• Publication Number:
  US 20170341420A1
• Time in Patent Office: 952 Days
• CPC Class Codes: B41F 17/006 for printing on curved surfaces not otherwise provided for
• CPC Class Codes: B41F 17/20 on articles of uniform cross-section, e.g. pencils, rulers, resistors
• CPC Class Codes: B41F 19/007 with selective printing mechanisms, e.g. ink-jet or thermal printers
• CPC Class Codes: B41J 11/007 Conveyor belts or like feeding devices
• 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 printing technique is presented for efficiently printing (i.e. with production lines rates at high resolution and high accuracy) on outer surfaces of a plurality of objects passing in an optimized stream through a printing route/zone. According to this technique, at least one array of printing head units is provided being configured to define at least one printing route along a printing axis, where the at least one printing route is a substantially linear segment of a closed loop lane along which the objects are progressing.

Claims

1. A support assembly for treating objects, wherein said support assembly configured to concurrently carry at least one stream of objects, the support assembly comprising:

movable board coupled to a lane for moving said at least one stream of objects along said lane;

at least one array of grippers arranged on said movable board in one or more rows, each of the grippers configured to be received inside a respective one of the objects for holding the objects thereon; and

a mobilizing mechanism mounted on said movable board and configured and operable to controllably move said movable board along the lane for applying along said lane at least one treatment process to surface areas of the objects held by the at least one array of grippers.

2. The support assembly of claim 1 wherein the at least one treatment process includes at least one of the following:

printing, inspection, curing, drying, dust removal, coating, ionizing, or priming.

3. The support assembly of claim 1 wherein the mobilizing mechanism is configured and operable to enable smooth and continuous movement of the movable board over at least one curved section of the lane.

4. The support assembly of claim 1 wherein the mobilizing mechanism mounted on the movable board includes a linear motor element configured and operable to magnetically couple with magnet elements provided in the lane and permit controllable linear movement of the movable board over the lane.

5. The support assembly of claim 1, further comprising a control unit configured and operable to actuate the mobilizing mechanism for moving the movable board along the lane.

6. The support assembly of claim 5 wherein the control unit is configured and operable to move the movable board along the lane to a loading zone for loading the at least one stream of objects onto the at least one array of grippers.

7. The support assembly of claim 5 wherein the control unit is configured and operable to move the movable board along the lane to an unloading zone for unloading the at least one stream of objects from its at least one array of grippers.

8. The support assembly of claim 5 wherein the control unit is configured and operable to communicate data associated with at least one of the following:

position of the support assembly, velocity of the support assembly, angular position of the grippers of the at least one array of grippers of the support assembly, angular velocity of the grippers of the at least one array of grippers of said support assembly, or data associated with at least one other support assembly movably coupled to the lane.

9. The support assembly of claim 8 wherein the control unit is configured and operable to control at least one of the following based on the communicated data:

speed of the support assembly, position of the support assembly on the lane, angular rotation speed of the grippers of the at least one array of grippers of the support assembly, or angular position of the grippers of the at least one array of grippers.

10. The support assembly of claim 5 wherein the control unit is configured and operable to control rotation of the grippers of the at least one array of grippers at the same angular speed and direction of rotations, and/or positioning of the objects held by said grippers at a substantially same angular position.

11. The support assembly of claim 5 wherein the control unit is configured and operable to adjust cross-sectional dimensions of the grippers of the at least one array of grippers for contacting inner portions of the objects and holding them thereon.

12. The support assembly of claim 1 wherein the grippers of the at least one array of grippers are configured to rotate the objects.

13. The support assembly of claim 1 wherein each gripper of the at least one array of grippers is being configured and operable for varying its cross-sectional dimension for holding one of said objects thereon.

14. The support assembly of claim 13 wherein at least one of the grippers of the at least one array of grippers includes:

a circular array of spaced-apart elements arranged about a central axis of the gripper, and

a mechanism operable for moving the circular array of spaced-apart elements towards and away from the central axis.

15. The support assembly of claim 1 wherein the grippers of the at least one array of grippers form two parallel rows, said two parallel rows of grippers being substantially perpendicular to at least a section of the lane.

16. The support assembly of claim 15 wherein at least one pair of adjacently located grippers belonging to the different rows of the two parallel rows of grippers are substantially aligned in a same plane and extend in opposite directions therein.

17. The support assembly of claim 15 wherein at least one pair of adjacently located grippers belonging to different rows of the two parallel rows of grippers are mechanically coupled one to the other.

18. A method of treating outer surface areas of a plurality of objects, wherein the method utilizing a support platform for concurrently moving at least one stream of said objects along a lane, the method comprising:

moving a movable board of said support assembly to a loading zone and loading the at least one stream of objects onto at least one array of grippers, said grippers arranged on said movable board in one or more rows and each gripper configured to be received in a respective one of the objects; and

activating a mobilizing mechanism mounted on said movable board for moving said movable board along the lane and applying at least one treatment process to outer surface areas of said at least one stream of objects in one or more treatment zones located along said lane.

19. The method of claim 18 wherein the loading of the at least one stream of objects includes varying cross-sectional dimension of the grippers of the at least one array of grippers.

20. The method of claim 18 wherein the loading of the at least one stream of objects includes adjusting orientation of said objects by the grippers.

21. The method of claim 18 wherein the applying of the at least one treatment process comprises rotating the at least one stream of objects by the grippers.

22. The method of claim 18, further comprising:

communicating data between the support assembly and a control unit; and

controlling at least one of position or angular speed of the at least one array of grippers based on the communicated data.

23. The method of claim 18, further comprising:

communicating data between the support assembly and at least one other support assembly movably coupled to the lane; and

controlling at least one of rotation speed or angular position of the grippers of the at least one array of grippers based on said data.

24. The method of claim 18 comprising performing either continuous linear movement or stepped linear movement of the support assembly while applying of the at least one treatment process.

25. A support assembly for treating objects, wherein said support assembly configured to carry at least one stream of objects thereon, the support assembly comprising:

at least two parallel rows of grippers coupled to said support assembly, each of the grippers configured to be received inside a respective one of the objects for holding the objects thereon; and

a mobilizing mechanism carried by said support assembly and configured to move said support assembly along a lane for simultaneously applying a treatment process to surface areas of the objects held by the grippers of said at least two parallel rows of grippers.