Automated inspection system with transport and ejector conveyor

• US 5,568,715 A
• Filed: 05/31/1994
• Issued: 10/29/1996
• Est. Priority Date: 05/31/1994
• Status: Expired due to Term

• Current Assignee: Johnson & Johnson Vision Products, Inc.
• Original Assignee: Johnson & Johnson Vision Products, Inc.
• Inventors: Widman, Michael F., Ebel, James A.
• Primary Examiner(s): Coan, James F.
• Application Number:
  US08/251,474
• Time in Patent Office: 882 Days
• Field of Search: 53/54, 53/53, 53/52, 53/498, 53/495, 53/494, 53/493, 209/509, 209/936, 209/939
• US Class Current: 53/54
• CPC Class Codes: B07C 5/3404 according to properties of containers or receptacles, e.g. rigidity, leaks, fill-level control devices for cigarette or cigar packaging B65B19/28; investigation of fluid-tightness of structures G01M3/00
• CPC Class Codes: B65B 25/008 packaging of contact lenses
• CPC Class Codes: B65B 57/10 responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
• CPC Class Codes: G01N 21/9508 Capsules; Tablets

Abstract

An automated inspection system for inspecting packages, such as blister packages, to verify the presence therein of products, such as contact lenses, prior to heat sealing of the blister packages. The automated inspection system includes a transport and ejector mechanism for ejecting any defective packages determined by the automated inspection system not to have a product therein. The automated inspection system includes an optical inspection station at which packages are optically inspected by video cameras to verify that a product is, in fact, present in each package base. A package conveyor system is provided for conveying the packages by the optical inspection station. Following the optical inspection station, an ejector ramp of the transport and ejector mechanism is selectively switchable between a first raised position in which package bases are passed on for further processing, and a second lowered position in which defective packages are transferred from the package conveyor system to the ejector ramp and a buffer area for ejected packages.

Claims

1. A transport and ejector conveyor for an automated inspection system comprising:

a. an optical inspection station at which a package array comprising connected individual package bases, each base having a product therein, is optically inspected to verify that the product is present in each package base;

i. wherein the optical inspection station comprises a plurality of video cameras, each of which optically inspects a given number of package bases;

ii. wherein the video cameras are mounted on a support which is independently adjustable by separate x, y and z adjustor mechanisms for translation along x, y and z axes to precisely position the video cameras relative to the package bases;

b. a package conveyor system for conveying the package bases by the optical inspection station;

c. an ejector system, selectively switchable between a first position in which the package bases are passed on the package conveyor system by the ejector system and a second position in which the ejector system transfers packages that are determined by the optical inspection station not to have a product therein from the package conveyor system to the ejector system.

2. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein said ejector system further comprises an ejection ramp which is raised or lowered onto the package conveyor system.

3. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein the package conveyor system includes a belt drive having drive lugs periodically spaced along the belt drive, and wherein the spaced drive lugs drive the packages along the spaced rails upon which the packages slide during movement along the package conveyor system.

4. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein the package conveyor system is periodically driven to index and stop the packages at periodically spaced positions along the package conveyor system.

5. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein each linear array of connected package bases comprises six connected package bases, and said optical inspection station includes three video bases, and said optical inspection station includes three video cameras placed in a series along the package conveyor system, and wherein each video camera optically examines an adjacent two connected package bases, and the three video cameras simultaneously optically examine all six connected package bases in each linear array.

6. A transport and ejector conveyor for an automated inspection system as claimed in claim 5, wherein at the optical inspection station an illumination fixture is mounted on one side of the package conveyor system, and the video cameras are mounted on an opposite second side of the package conveyor system.

7. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein said package conveyor system includes an endless conveyor which travels in an endless loop.

8. A transport and ejector conveyor for an automated inspection system as claimed in claim 7, wherein said endless conveyor travels in an endless loop by a package base depositing station at which package bases are deposited onto the package conveyor system, a product depositing station at which products are deposited into each package base, and said optical inspection station at which the packages are optically inspected to verify that each package base has a product deposited therein, and said ejector system is positioned adjacent to said package conveyor system after the optical inspection system.

9. A transport and ejector conveyor for an automated inspection system as claimed in claim 7, wherein the endless conveyor includes an endless drive belt having drive lugs periodically spaced along the drive belt, and wherein the spaced drive lugs drive the packages along spaced rails upon which the packages slide during movement along the package conveyor system.

10. A transport and ejector conveyor for an automated inspection system as claimed in claim 7, wherein said endless conveyor travels in an endless loop by a package base depositing station at which package bases are deposited onto the package conveyor system, a product depositing station at which products are deposited into each package base, and said optical inspection station at which the packages are optically inspected to verify that each package base has a product deposited therein, and said ejector system is positioned adjacent to said package conveyor system after the optical inspection system.

11. A transport and ejector conveyor for an automated inspection system as claimed in claim 10, wherein the endless conveyor includes an endless drive belt having drive lugs periodically spaced along the drive belt, and wherein the spaced drive lugs drive the packages along spaced rails upon which the packages slide during movement along the package conveyor system.

12. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein said ejector system comprises an ejector conveyor system.

13. A transport and ejector conveyor for an automated inspection system as claimed in claim 12, wherein said ejector system further comprises an ejection ramp which is raised or lowered onto the package conveyor system.

14. A transport and ejector conveyor for an automated inspection system as claimed in claim 13, wherein said ejector conveyor system includes an endless belt transport for transporting ejected packages up the ejection ramp to a buffer area on which ejected packages are accumulated.

15. A transport and ejector conveyor for an automated inspection system as claimed in claim 13, wherein a pneumatic cylinder drives the ejection ramp between raised and lowered positions.

16. A transport and ejector conveyor for an automated inspection system as claimed in claim 1, wherein the package conveyor system includes spaced rails upon which the packages slide during movement along the package conveyor system.

17. A transport and ejector conveyor for an automated inspection system as claimed in claim 16, wherein the packages define a product receiving cavity, and the spaced rails include two spaced rails which are positioned on opposite sides of the product receiving cavity.

18. A transport and ejector conveyor for an automated inspection system as claimed in claim 17, wherein the packages further define first alignment lugs at a first side of the package adjacent to and slightly spaced from the product receiving cavity, and a first rail is positioned between the first alignment lugs and the product receiving cavity, and second alignment lugs depending from a second side of the package which ride along a second rail.

19. A transport and ejector conveyor for an automated inspection system as claimed in claim 18, wherein the package conveyor system includes a belt drive having drive lugs periodically spaced along the belt drive, and wherein the spaced drive lugs drive the packages along the spaced rails.

20. A transport and ejector conveyor for an automated inspection system as claimed in claim 19, wherein the package conveyor system is periodically driven to index and stop the packages at periodically spaced positions along the package conveyor system.

21. A transport and ejector conveyor for an automated inspection system as claimed in claim 16, wherein each of the rails is rounded along its top edge.