Apparatus for counting parts in a tray

• US 5,940,466 A
• Filed: 10/29/1997
• Issued: 08/17/1999
• Est. Priority Date: 10/29/1997
• Status: Expired due to Term

• Current Assignee: Micron Technology, Inc.
• Original Assignee: Micro Electronics Incorporated
• Inventors: Brunelle, Steven J.
• Primary Examiner(s): RUBIN, MARGARET R
• Application Number:
  US08/959,698
• Time in Patent Office: 657 Days
• Field of Search: 377/6, 377/8, 377/10
• US Class Current: 377/6
• CPC Class Codes: G06M 7/00 Counting of objects carried by a conveyor

Abstract

One embodiment of the invention is an apparatus for counting parts. The apparatus includes a tray having at least one location for containing a part; a plate having at least one hole positioned above the at least one location; a pneumatic device coupled to the at least one hole; and a sensing element for determining the presence of a tray part in the at least one location when the pneumatic device is active.

Claims

1. An apparatus for counting parts comprising:

a) a tray having at least one location for containing a part;

b) a plate having at least one hole positioned above the at least one location;

c) a pneumatic device coupled to the at least one hole;

d) a sensing element for determining the presence of a tray part in the at least one location when the pneumatic device is active; and

e) means for recording a count of the number of parts sensed by the sensing element.

2. The apparatus of claim 1, further including a conveyor belt for moving the tray.

3. The apparatus of claim 1, wherein the sensing element is a pressure sensor device.

4. The apparatus of claim 1, wherein the sensing element senses a change in air flow through the at least one hole caused by the tray part in the at least one location.

5. The apparatus of claim 1, further including a hose coupled between the pneumatic device and a chamber of the plate providing a structure for air to flow from the hose to the holes of the plate.

6. The apparatus of claim 1, further including a hose coupled between the pneumatic device and the at least one hole.

7. The apparatus of claim 1, further including a pliable material coupled to the plate to surround the at least one hole and provide a partial seal between the at least one hole and the at least one location.

8. The apparatus of claim 1, further including a storage medium coupled to the sensing element.

9. The apparatus of claim 8, wherein the count results are stored on the storage media.

10. The apparatus of claim 1, wherein the plate further includes means for aligning the at least one hole of the plate over the respective tray location.

11. The apparatus of claim 10, wherein the aligning means further includes at least one receiving indent and complementary positioning knob located on the plate and tray, respectively.

12. The apparatus of claim 1, further including means for positioning the plate above the tray.

13. The apparatus of claim 12, wherein the positioning means further includes an automated robotic arm coupled to the plate.

14. The apparatus of claim 1, further including means for positioning the tray below the plate.

15. The apparatus of claim 14, wherein the positioning means further includes a mechanical or reflective light sensor for sensing when a conveyor belt has moved the tray to a desired location below the plate.

16. An apparatus for counting parts comprising:

a) a tray having an array of part locations;

b) a complementary array of holes in a plate positioned over the array of part locations;

c) means for providing air flow through the array of holes; and

d) means for detecting the presence of the parts in the part locations.

17. The apparatus of claim 16, wherein the air flow means further includes a pneumatic device coupled to the array of holes.

18. The apparatus of claim 16, wherein the means for detecting the presence of parts in the locations includes means for sensing a change in the air flow through the array of holes in the plate.

19. The apparatus of claim 18, wherein the sensing means further includes a pressure sensor device.