Methods and systems for sensing and rectifying pellet shaped articles for subsequent processing

• US 5,894,801 A
• Filed: 09/30/1997
• Issued: 04/20/1999
• Est. Priority Date: 09/30/1997
• Status: Expired due to Term

• Current Assignee: Ackley Machine Corporation
• Original Assignee: Ackley Machine Corporation
• Inventors: Ackley, E. Michael
• Primary Examiner(s): Eickholt, Eugene H.
• Application Number:
  US08/941,399
• Time in Patent Office: 567 Days
• Field of Search: 101/2, 101/37, 101/38, 101/39, 101/40, 101/483, 101/485, 209/522, 209/558, 209/580, 209/581, 209/582, 209/586, 209/587, 250/559.26, 356/237
• US Class Current: 101/485
• CPC Class Codes: B25J 9/1679 characterised by the tasks executed
• CPC Class Codes: G01N 21/9508 Capsules; Tablets
• CPC Class Codes: G05B 2219/39508 Reorientation of object, orient, regrasp object
• CPC Class Codes: G05B 2219/40564 Recognize shape, contour of object, extract position and orientation
• CPC Class Codes: G05B 2219/50151 Orient, translate, align workpiece to fit position assumed in program

Abstract

A dispenser dispenses pellet shaped articles onto a conveyer. The conveyer conveys the pellet shaped articles past a video sensor that senses any pellet shaped articles needing rotation so that they are uniformly oriented. The sensor provides a signal to a manipulating device which manipulates certain pellet shaped articles so that all of the articles are uniformly oriented. The conveyer transports the pellet shaped articles to a first pellet shaped article modifying device that, for example, prints indicia on the pellet shaped articles. A rectifying drum reorients all of the pellet shaped articles in order for printing to be performed on a reverse side. A second sensor and a second manipulating device may also be provided. An inspection system to determine whether a pellet shaped article is defective after a performed modification is also provided.

Claims

1. A pellet shaped article orienting apparatus, comprising:

a conveyor that conveys a plurality of pellet shaped articles along a predefined path, the pellet shaped articles having at least a first side and a second side, at least one of the first and second sides including a predetermined characteristic;

a dispenser that dispenses the pellet shaped articles on the conveyor;

a sensor that senses the pellet shaped articles on the conveyor; and

a manipulating device associated with the sensor that manipulates selected ones of the pellet shaped articles to uniformly orient all of the pellet shaped articles depending on whether a predetermined characteristic is detected by the sensor.

2. The apparatus of claim 1, wherein the sensor is a video camera.

3. The apparatus of claim 1, wherein the predetermined characteristic is at least one of printing indicia and a predetermined color.

4. The apparatus of claim 1, wherein the predetermined characteristic is a predetermined position of the articles with respect to the conveyor.

5. The apparatus of claim 1, further comprising a modifying device located downstream from the manipulating device that modifies at least one of the first and second sides of the pellet shaped articles.

6. The apparatus of claim 5 further comprising:

a rectifying device located downstream from the modifying device, the rectifying device rectifying all of the pellet shaped articles;

and a second modifying device that modifies the other of the first and second sides of the pellet shaped articles which are not modified.

7. A pellet shaped article rectifying and modifying apparatus, comprising:

a conveyer to convey a plurality of pellet shaped articles along a predefined path, the pellet shaped articles having a first side having a first base color and a second side having a second base color different from the first base color;

a pellet shaped article dispenser to dispense the pellet shaped articles onto the conveyer;

a pellet shaped article sensor located downstream of the pellet shaped article dispenser, the pellet shaped article sensor sensing at least one of the first and second base colors of the pellet shaped articles within a scanning area of the pellet shaped article sensor;

a manipulation device located downstream from the pellet shaped article sensor to manipulate selected ones of the pellet shaped articles in response to the base color detected by the pellet shaped article sensor so that all of the pellet shaped articles are uniformly oriented; and

a pellet shaped article modifying device located downstream from the manipulation device for modifying the pellet shaped articles.

8. The apparatus of claim 7, wherein the pellet shaped article modifying device is a first printing device for printing indicia on the pellet shaped articles, the indicia being substantially different from one of the first base color and the second base color on which printing is performed.

9. The apparatus of claim 8, wherein the manipulation device selectively manipulates the pellet shaped articles so that one of the first base color and the second base color of the pellet shaped articles faces the first printing device.

10. The apparatus of claim 9, further comprising a second printing device aligned substantially with the first printing device, wherein the first and second printing devices substantially simultaneously print indicia on the first and second base colors of the pellet shaped articles.

11. The apparatus of claim 10,

wherein the first printing device prints indicia on one of the first base color and the second base color,

wherein the second printing device prints indicia on the other of the first base color and the second base color,

wherein the indicia of the first printing device is different than the base color on which printing is performed with the first printing device, and

wherein the indicia of the second printing device is different than the base color on which printing is performed with the second printing device.

12. The apparatus of claim 8, wherein the first printing device prints indicia on the first base color, and a printing color of the indicia substantially matches the second base color of the pellet shaped articles.

13. The apparatus of claim 8, further comprising:

a rectifying drum located downstream from the printing device to reorient all of the pellet shaped articles after the first printing device prints indicia on the pellet shaped articles; and

a second printing device located downstream from the rectifying drum, the rectifying drum reorienting the pellet shaped articles so that a non-printed side of each of the pellet shaped articles faces the second printer, the second printing device printing indicia on the non-printed sides of the pellet shaped articles, the indicia of the second printing device being substantially different than the other of the first base color and the second base color of the non-printed sides.

14. The apparatus of claim 13, further comprising:

a second sensor located downstream from the rectifying drum for sensing at least one of the printed side and the non-printed side of the pellet shaped articles; and

a second manipulation device located downstream from the second sensor to manipulate selected ones of the pellet shaped articles in response to signals of the second sensor.

15. The apparatus of claim 14,

wherein the second manipulation device manipulates the pellet shaped articles so that the first base color faces the second printing device;

and

wherein the second printing device prints indicia on the first base color of the pellet shaped articles, the printing color of the indicia being substantially the same color as the second base color of the pellet shaped articles.

16. The apparatus of claim 14,

wherein the second manipulation device manipulates selected ones of the pellet shaped articles so that the second base color faces the second printing device;

and

wherein the second printing device prints indicia on the second base color of the pellet shaped articles, the indicia being substantially the same color as the first base color of the pellet shaped articles.

17. The apparatus of claim 7, wherein the pellet shaped article modifying device is a drilling device for drilling holes in one of the first side and the second side of the pellet shaped articles.

18. The apparatus of claim 17, further comprising:

a rectifying drum located downstream from the drilling device to reorient all of the pellet shaped articles after the drilling device drills holes in the pellet shaped articles; and

a second drilling device located downstream from the rectifying drum, the rectifying drum reorienting all of the pellet shaped articles so that a non-drilled side of each of the pellet shaped articles faces the second drilling device, the second drilling device drilling holes in the non-drilled sides of the pellet shaped articles.

19. The apparatus of claim 18, further comprising:

a second sensor located downstream from the rectifying drum for sensing at least one of the drilled side and the non-drilled side of the pellet shaped articles; and

a second manipulation device located downstream from the second sensor to manipulate the pellet shaped articles, wherein the second manipulation device manipulates selected ones of the pellet shaped articles in response to the second sensor so that the non-drilled side faces the second drilling device,

wherein the second drilling device drills holes in the non-drilled side of the pellet shaped articles.

20. The apparatus of claim 17, wherein the conveyer is a drum-shaped conveyor.

21. The apparatus of claim 20, wherein the drum shaped conveyor includes, in order, the sensor, the manipulation device, and the pellet shaped article modifying device.

22. The apparatus of claim 20, wherein the pellet shaped articles are held stationary in the drumshaped conveyer by vacuum means.

23. The apparatus of claim 7, wherein the pellet shaped article is a capsule having a first diameter end and a second diameter end smaller than the first diameter end, the sensor sensing one of the first diameter end and the second diameter end of the pellet shaped articles.

24. The apparatus of claim 23, wherein the first end has a first base color and a second end has a second base color.

25. A pellet shaped article rectifying and modifying apparatus, comprising:

conveying means for conveying a plurality of pellet shaped articles along a predefined path, the pellet shaped articles having a first side having a first base color and a second side having a second base color;

dispensing means for dispensing the pellet shaped articles onto the conveying means;

sensing means for sensing at least one of the first and second base colors of the pellet shaped articles within a scanning area of the sensing means;

manipulating means for manipulating selected ones of the pellet shaped articles in response to the base color detected by the sensing means so that all of the pellet shaped articles are uniformly oriented; and

pellet shaped article modifying means for modifying the pellet shaped articles.

26. The apparatus of claim 25, wherein the pellet shaped article modifying means comprises printing means for printing indicia on the pellet shaped articles, the indicia being substantially different from one of the first base color and the second base color of the pellet shaped articles on which printing is performed.

27. The apparatus of claim 26, further comprising:

rectifying means for manipulating all of the pellet shaped articles after the printing means prints indicia on the pellet shaped articles; and

second printing means, the rectifying means manipulating the pellet shaped articles so that non-printed sides of the pellet shaped articles face the second printing means, the second printing means printing indicia on the non-printed sides of the pellet shaped articles, the indicia being substantially different than the other of the first base color and the second base color of the non-printed sides.

28. The apparatus of claim 27, further comprising:

second sensing means for sensing one of the printed sides and non-printed sides of the pellet shaped articles; and

second manipulation means for manipulating selected ones of the pellet shaped articles in response to the second sensing means.

29. The apparatus of claim 28,

wherein the second manipulating means manipulates the pellet shaped articles so that the non-printed sides of the pellet shaped article face the second printing means;

and

wherein the second printing means prints indicia on the non-printed sides of the pellet shaped articles, the indicia being substantially different than the other of the first base color or the second base color of the non-printed sides.

30. The apparatus of claim 29, wherein each of the pellet shaped articles has a first end having a first cross-sectional diameter and a second end having a second cross-sectional diameter, the first cross-sectional diameter being different than the second cross-sectional diameter.

31. The apparatus of claim 30,

wherein the sensing means senses one of the first cross sectional diameter and the second cross sectional diameter;

wherein the rectifying means manipulates the pellet shaped articles in response to the sensing means; and

wherein the printing means prints indicia on one of the first cross sectional diameter and the second cross sectional diameter, the indicia being substantially different than a base color on which printing is performed.

32. The apparatus of claim 31,

wherein the second manipulation means manipulates the pellet shaped articles after the printing means prints indicia on the pellet shaped articles, and

wherein the second printing means prints indicia on the non-printed sides of the pellet shaped articles, the indicia being substantially different than a base color of the non-printed side.

33. The apparatus of claim 25, wherein the pellet shaped article modifying means comprises drilling means for drilling holes in the pellet shaped articles.

34. The apparatus of claim 33, further comprising:

rectifying means for reorienting all of the pellet shaped articles after the drilling means drills the pellet shaped articles; and

second drilling means, the rectifying means manipulating the pellet shaped articles so that non-drilled sides of the pellet shaped articles face the second drilling means, the second drilling means drilling holes on the non-drilled sides of the pellet shaped articles.

35. The apparatus of claim 34, further comprising:

second sensing means for sensing one of the drilled sides and non-drilled sides of the pellet shaped articles; and

second manipulation means for manipulating selected ones of the pellet shaped articles in response to the second sensing means so that the second drilling means drills holes in one of the non-drilled side and drilled side of the pellet shaped articles.

36. A pellet shaped article inspection apparatus, comprising:

a conveyor that conveys a plurality of pellet shaped articles along a predefined path;

a pellet shaped article sensor located substantially adjacent to the conveyor, the pellet shaped article sensor being configured to determine whether any of the pellet shaped articles are defective;

a vacuum drum positioned above the conveyor and being associated with the pellet shaped article sensor, the vacuum drum having a plurality of vacuum receiving holes each receiving one of the pellet shaped articles, the vacuum drum including a control device for selectively activating the vacuum receiving holes in response to the determination of the pellet-shaped article sensor, wherein defective articles are not received in the vacuum receiving holes of the vacuum drum.

37. The apparatus of claim 36, wherein non-defective pellet shaped articles are received in the vacuum receiving holes of the vacuum drum by selective activation of a vacuum and are ejected into a drop off bin.

38. A method of orienting pellet shaped articles, comprising:

dispensing a plurality of pellet shaped articles on a conveyor;

conveying the pellet shaped articles along a predefined path, the plurality of pellet shaped articles having at least first and second sides, one of said first and second sides including a predetermined characteristic;

sensing the pellet shaped articles on the conveyor; and

rectifying selected pellet shaped articles while on the conveyor depending on whether the predetermined characteristic is sensed so that the pellet shaped articles are uniformly oriented on the conveyor.

39. The method of claim 38, further comprising modifying the pellet shape articles.

40. An apparatus for orienting pellet shaped articles, comprising:

means for dispensing a plurality of pellet shaped articles on a conveyor;

means for conveying the pellet articles along a predefined path, the plurality of pellet shaped articles having at least first and second sides, one of said first and second sides including a predetermined characteristic;

means for sensing the pellet shaped articles on the conveying means; and

means for rectifying selected pellet shaped articles while on the conveying means depending on whether the predetermined characteristic is sensed so that the pellet shaped articles are uniformly oriented on the conveying means.