Optical code reader sorting apparatus conditioned by trigger indicia

• US 4,919,799 A
• Filed: 12/14/1988
• Issued: 04/24/1990
• Est. Priority Date: 12/14/1988
• Status: Expired due to Fees

• Current Assignee: Coors Brewing Company Incorporated (Molson Coors Brewing Company)
• Original Assignee: Adolph Coors Company (Molson Coors Beverage Co.)
• Inventors: Siemer, David R., Menardi, Elaine A., Rhodes, Terrence E.
• Primary Examiner(s): Focarino, Margaret A.
• Assistant Examiner(s): Wacyra, Edward M.
• Application Number:
  US07/285,518
• Time in Patent Office: 496 Days
• Field of Search: 209/538, 209/539, 209/540, 209/545, 209/551, 209/563-566, 209/569, 209/583, 209/644, 250/566, 250/224, 356/23, 356/426, 356/428, 235/471, 194/205, 194/208, 194/209, 194/212, 194/213
• US Class Current: 209/538
• CPC Class Codes: B07C 5/3412 according to a code applied to the object which indicates a property of the object, e.g. quality class, contents or incorrect indication sorting according to size measured by light-responsive means B07C5/10; sorting according to optical properties B07C5/342; for packages B65D79/02; for information carriers G06K7/00
• CPC Class Codes: B07C 5/366 during free fall of the articles

Abstract

A sorting apparatus for differentiating between generally identically shaped objects based upon code indicia provided on a predetermined, relatively small surface area portion on the sidewall of each object, including: a transfer assembly for moving the objects in single file relationship along a transfer path; a spinning assembly for engaging an object in the transfer path and for spinning the engaged object about its longitudinal axis during a relatively short duration spinning period without removing the object from the transfer path; a trigger assembly for sensing the passage of a trigger indicia, located at a predetermined circumferential position on the surface of the object relative to the code indicia; a code indicia reading assembly for reading the code indicia printed on the object; a reading actuation assembly responsive to the trigger signal for actuating the code indicia reading assembly at a time when the code indicia on the object is positioned in indexed, readable relationship with the reading assembly; and a comparator assembly for comparing the indicia reading signal to predetermined comparison criteria and for generating a criteria match signal indicative of a match between the indicia reading signal and the predetermined criteria.

Claims

1. An apparatus for distinguishing between generally identically shaped objects having a first end, a second end, a central longitudinal axis and a longitudinally extending sidewall based upon code indicia provided on a predetermined, relatively small surface area portion on the sidewall of each object, comprising:

(a) transfer means for moving said objects in single file relationship along a transfer path extending substantially perpendicular to the longitudinal axes of the objects being moved therealong;

(b) spinning means for engaging an object in said transfer path and for spinning said engaged object about its longitudinal axis during a relatively short duration spinning period without removing said object from said transfer path;

(c) trigger means for sensing the passage of a trigger indicia, located at a predetermined circumferential position on the surface of said object relative to said code indicia, during the spinning of said object by said spinning means and for generating a trigger signal responsive thereto;

(d) code indicia reading means for reading said code indicia printed on said object and for generating an indicia reading signal indicative of indicia read thereby; and

(e) reading actuation means responsive to said trigger signal for actuating said code indicia reading means for a short duration period during the spinning of said object at a time when said code indicia on said object is positioned in readable relationship with said reading means.

2. The invention of claim 1 further comprising:

comparator means for receiving the indicia reading signal from said indicia reading means and for comparing said signal to predetermined comparison criteria and for generating a criteria match signal indicative of a match between said indicia reading signal and said predetermined criteria.

3. The invention of claim 2 further comprising:

object segregating means responsive to said criteria match signal for segregating objects having code indicia conforming to said predetermined criteria from objects having code indicia not conforming to said predetermined criteria.

4. The invention of claim 3 wherein said object segregating means comprises an axial displacement device for axial discharging an object from a pocket means in response to said criteria match signal.

5. The invention of claim 4, said axial displacement means comprising a valve actuated air jet.

6. The invention of claim 2 further comprising:

recording means responsive to said criteria match signal for recording the number of objects passing through said transfer means which match said predetermined criteria.

7. The invention of claim 2 wherein said transfer means comprises:

(a) starwheel means for receiving and transferring said objects along an arcuate transfer path, comprising;

(i) a central axis of rotation extending parallel to said central longitudinal axes of said objects received in said starwheel means; and

(ii) pocket means arranged symmetrically about the periphery of said starwheel means for receiving and holding said objects therein;

(b) starwheel drive means for rotating said starwheel means about said central axis of rotation;

(c) starwheel indexing means for controlling the rotation of said starwheel means for temporarily placing each pocket means thereon in axially opposite, indexed relationship with said spinning means for enabling axial engagement and spinning of an object in an indexed pocket means by said spinning means.

8. The invention of claim 7 wherein said trigger means comprises a stationary sensor positioned along said arcuate transfer path proximate said spinning means.

9. The invention of claim 8 wherein said trigger means comprises an optical sensor.

10. The invention of claim 9 wherein said trigger means optical sensor comprises a laser.

11. The invention of claim 7 wherein said code indicia reading means comprises:

(a) asynchronous strobe means for briefly illuminating an area of an object containing said code indicia thereon; and

(b) camera means for producing an image of said code indicia during illumination thereof by said strobe means; and

(c) image processing means for processing said code indicia image produced by said camera means for recognizing data provided in said image.

12. The invention of claim 11, said strobe means and said camera means each being positioned at a fixed location along said object transfer path proximate said spinning means.

13. The invention of claim 2 wherein said comparator means comprises a microprocessor.

14. The invention of claim 2 wherein said predetermined comparison criteria comprises a plurality of different sets of criteria.

15. The invention of claim 14 wherein said comparator means generates a distinguishable match signal for a match of each different set of criteria.

16. The invention of claim 15 further comprising recording means for recording the number or criteria matches associated with each of said different sets of criteria.

17. The invention of claim 16 wherein each different set of criteria is associated with a different beverage product source.

18. The invention of claim 1 wherein said reading actuation means comprises a microprocessor.

19. The invention of claim 1 wherein said spinning means comprises:

suction cup means positioned at a fixed location along said transfer path for engaging, holding, and disengaging an object at an end surface portion of the object, said suction cup means having a central longitudinal axis positioned in substantially coaxial relationship with the central longitudinal axis of each said object positioned in a pocket means when said pocket means is positioned in an indexed relationship with said spinning means;

rotating means for rotating said suction cup means about said suction cup central longitudinal axis.

20. A method of distinguishing between generally identically shaped objects based upon code indicia provided on a predetermined, relatively small surface area portion of the sidewall of each object comprising:

(a) moving the objects to be sorted in a single file relationship along a continuous object transfer path extending transversely of the longitudinal axes of the objects;

(b) temporarily halting the movement of each object moving along the transfer path at a predetermined spinning station along the path;

(c) spinning each object which is stopped at the spinning station about its longitudinal axis without removing the object from the transfer path

(d) during the spinning of each object, monitoring a narrow circumferential band at a predetermined axial location on the surface of the object with a stationary sensor for detecting the passage of an axially extending trigger indicia provided on the surface of the object in predetermined circumferential relationship with the code indicia provided on the object and generating a trigger signal indicative thereof; and

(e) in response to said trigger signal, actuating a stationary, imaging apparatus at a time, during spinning of the object, when the code indicia on the object is located in the field of view of the imaging apparatus so as to generate an image of the code indicia.

21. The method of claim 20 comprising the further step of:

comparing the image of the code indicia generated by the imaging apparatus to predetermined criteria.

22. The invention of claim 21 comprising the further step of:

physically segregating the objects having code indicia conforming to said predetermined criteria from objects having code indicia not conforming to said predetermined criteria.

23. The invention of claim 21 comprising the further step of recording the passage of each object having code indicia matching said predetermined criteria.

24. An apparatus for sorting generally identically shaped elongate objects of the type having a first end, a second end, a central longitudinal axis extending between said first end and said second end, and a circumferentially and longitudinally extending sidewall, the sorting being based upon information contained in coded indicia provided in the same, relatively small area region on the sidewall surface of each object, said small area region lying within a circumferential band containing other, circumferentially obstructing indicia, each object also comprising a trigger indicia positioned in a predetermined, circumferentially fixed relationship with the code indicia, said trigger indicia being provided in a 360°

circumferential band which is free of indicia other than said trigger indicia, said sorting apparatus comprising;

(a) starwheel means for moving said objects along an arcuate transfer path, said starwheel means having a first axial end, a second axial end, and a central axis of rotation; and

having a plurality of equally circumferentially spaced object receiving and holding pockets positioned at the periphery thereof, each of said pockets being adapted to hold one of said objects therein with said central longitudinal axis of said object positioned parallel to said central longitudinal axis of said starwheel and with said first end of said object positioned proximate said first axial end of said starwheel means and with said second end of said object positioned proximate said second axial end of said starwheel means;

(b) guiding means operatively associated with said starwheel means for retaining said objects received in said pockets in radially, axially and circumferentially stationary relationship with respect to said starwheel means while said objects are transversing said arcuate transfer path;

(c) a starwheel indexing drive means for rotating said starwheel means about said central axis of rotation in a series of equal incremental movements, the number of said equal incremental movements required to provide a complete revolution of said starwheel means being equal to an integer number multiple of the number of pockets provided on said starwheel means whereby each pocket is positioned in the same relatively rotated position as the immediately preceding pocket after a predetermined number of incremental movements;

(d) starwheel position indicating means for sensing predetermined, relatively rotated positions of said starwheel means corresponding to the axial alignment of each pocket on said starwheel with a predetermined spinning station positioned at a fixed location along said arcuate transfer path and for providing an indexing signal in response thereto;

(e) spinning means located at said spinning station and engageable and disengageable from an object in a pocket positioned in indexing relationship with said spinning station for spinning said object about its central longitudinal axis without removing the object from said pocket;

(f) trigger indicia sensor means positioned at said spinning station at a fixed location radially adjacent to said transfer path, said trigger indicia sensor means having a scanning beam adapted to be directed upon the surface of an object being spun by said spinning means in the region of said circumferential band containing said trigger indicia for sensing the passage of said trigger indicia and generating a trigger signal in response thereto;

(g) asynchronous strobe means positioned proximate said camera means for illuminating said object during spinning thereof at a time when the code indicia thereon is positioned in camera viewable relationship with a camera means;

(h) camera means positioned at said spinning station at a location radially adjacent to an object in a pocket which is indexed to said spinning station and at an axial location corresponding to the axial location of said code indicia on the object for generating an electronic image of the code indicia;

(i) object rejection means for removing an object from the normal flow of objects along said arcuate transfer path; and

(j) data processing means for receiving said indexing signal and for generating a spinning means control signal in response thereto for actuating said spinning means to engage, spin, and disengage an object positioned in an oppositely aligned pocket in response thereto; and

for generating a trigger sensor control signal in response to said indexing signal for actuating said trigger indicia sensor means to sense the passage of trigger indicia passing through said trigger indicia sensor means scanning beam; and

for receiving said trigger signal and for generating a strobe control signal in response thereto for actuating said asynchronous strobe means at a time when said code indicia on an object being spun is positioned in camera-viewable relationship with said camera means; and

for generating a camera control signal in response to said trigger signal for actuating said camera for producing said electronic image of said code indicia during illumination thereof by said asynchronous strobe means; and

for processing said code indicia image for comparing said image to predetermined criteria and for generating an object reject control signal based upon said comparison for actuating said object reject means for removing objects conforming to said predetermined criteria.

25. The invention of claim 24 wherein said objects comprise a circular cross section.

26. The invention of claim 25 wherein said objects comprise a generally cylindrical configuration.

27. The invention of claim 26 wherein said objects are can bodies.

28. The invention of claim 24 wherein said code indicia is indicative of a particular decorator which decorated graphics on the object.

29. The invention of claim 24 wherein said code indicia is indicative of the date upon which a particular mass production operation was performed on the object.

30. The invention of claim 24 wherein said code indicia is indicative of the operating shift at which a particular mass production operation was performed on the object.

31. The invention of claim 24 wherein said code indicia is indicative of the source of said object.

32. The invention of claim 24 wherein said data processing means comprises a digital computer.