Method and Apparatus for the Counting and Dispensing of Tablets

• US 20190021956A1
• Filed: 07/20/2017
• Published: 01/24/2019
• Est. Priority Date: 07/20/2017
• Status: Active Grant

• Current Assignee: Capsa Solutions LLC
• Original Assignee: Capsa Solutions LLC
• Inventors: Geltser, Aleksandr R., Dworkin, Samuel
• Granted Patent: US 10,537,496 B2
• Time in Patent Office: Days
• CPC Class Codes: A61J 2200/70 Device provided with specific sensor or indicating means
• CPC Class Codes: A61J 2205/40 by shape or form, e.g. by using shape recognition
• CPC Class Codes: A61J 2205/60 using magnetic or electronic identifications, e.g. chips, RFID, electronic tags
• CPC Class Codes: A61J 7/0076 Medicament distribution means with pill counting devices A61J7/02; with time indication A61J7/04; containers or packages with special means for dispensing contents B65D83/00
• CPC Class Codes: A61J 7/02 Pill counting devices
• CPC Class Codes: A61J 7/04 Arrangements for time indication or reminder for taking medicine, e.g. programmed dispensers
• CPC Class Codes: B65B 35/14 by agitators or vibrators
• CPC Class Codes: B65B 5/103 for packaging pills or tablets
• CPC Class Codes: B65B 57/20 Applications of counting devices for controlling the feed of articles other applications B65B65/08
• CPC Class Codes: G07F 11/44 in which magazines the articles are stored in bulk
• CPC Class Codes: G07F 17/0092 for assembling and dispensing of pharmaceutical articles medical dispensers for private use, A61J7/00

Abstract

An apparatus for counting and dispensing tablets includes a vibratory tablet feeder for feeding tablets to be counted to an output opening, at least one electrically-controlled vibrator coupled to the tablet feeder for vibrating the tablet feeder such that a singulated flow of tablets exits the output opening, and an optical system including at least one light source and at least one detector array located about a channel disposed downstream from the output opening of the tablet feeder. The optical system is configured to count tablets that pass through the channel as well as determine a tablet size class for the tablets that pass through the channel. Operation of the at least one electrically-controlled vibrator is controlled based on the tablet size class determined by the optical system.

Claims

1. An apparatus for counting and dispensing tablets, the apparatus comprising:

a) a tablet feeder for feeding tablets to be counted and dispensed, the tablet feeder having an output opening;

b) at least one electrically-controlled vibrator coupled to the tablet feeder for vibrating the tablet feeder such that a singulated flow of tablets exits the output opening;

c) an optical system including at least one light source and at least one detector array located about a channel disposed downstream from the output opening of the tablet feeder, wherein the optical system is configured to count tablets that pass through the channel as well as determine a tablet size class for the tablets that pass through the channel; and

d) an electronic controller configured to control vibration amplitude of the at least one electrically-controlled vibrator based on the tablet size class determined by the optical system and the cumulative number of tablets counted by the optical system.

5. The apparatus according to claim 1, wherein:

the controller includes a look-up table implemented in computer memory that electronically stores one or more vibration amplitude setpoints for a number of tablet size classes.

6. The apparatus according to claim 5, wherein:

the optical system is configured to determine or update the tablet size class during a counting and dispensing operation that counts and dispenses a desired number of tablets; and

the controller uses the vibration amplitude setpoint corresponding to the table size class as stored in the look-up to update or change the target vibration amplitude value for control of the vibration amplitude of the at least one electrically-controlled vibrator during the counting and dispensing operation.

7. The apparatus according to claim 6, wherein:

the counting and dispensing operation is logically partitioned into a predefined set of counting phases; and

the look-up table is configured to store a number of vibration amplitude setpoints associated with the predefined set of counting phases for each respective tablet size class.

8. The apparatus according to claim 7, wherein:

the predefined set of counting phases include an initial counting phase carried out by the apparatus after an initial power-up sequence; and

the look-up table is configured to store a default vibration amplitude setpoint that is used as a target vibration amplitude value for control of the vibration amplitude of the at least one electrically-controlled vibrator during the initial counting phase.

9. The apparatus according to claim 8, wherein:

the optical system is configured to determine or update the tablet size class during the initial counting phase; and

the controller uses the vibration amplitude setpoint corresponding to such table size class as stored in the look-up table to update or change the target vibration amplitude value for control of the vibration amplitude of the at least one electrically-controlled vibrator during the initial counting phase.

10. The apparatus according to claim 9, wherein:

the controller is configured to transition out of the initial counting phase when the vibration amplitude of the at least one electrically-controlled vibrator exceeds the target vibration amplitude value for the initial counting phase.

11. The apparatus according to claim 8, wherein:

the predefined set of counting phases include a first sequence of counting phases carried out by the vibratory counting apparatus after the initial counting phase; and

the look-up table is configured to store vibration amplitude setpoints that can be used as a target vibration amplitude value for control of the vibration amplitude of the at least one electrically-controlled vibrator during the first sequence of counting phases.

12. The apparatus according to claim 11, wherein:

the optical system is configured to determine or update the tablet size class during the first sequence of counting phases; and

the controller uses the vibration amplitude setpoints corresponding to such table size classification as stored in the look-up table to update or change the target vibration amplitude value for control of the vibration amplitude of the at least one electrically-controlled vibrator during the first sequence of counting phases.

13. The apparatus according to claim 12, wherein:

the controller is configured to perform closed loop control of the at least one electrically-controlled vibrator based on difference between a measured amplitude of vibration of the least one electrically-controlled vibrator and a current target vibration amplitude;

wherein the controller is configured to increase a vibrator voltage level if the measured amplitude of vibration is less than the current target vibration amplitude, and the controller is configured to decrease the vibrator voltage level if the measured amplitude of vibration is greater than the current target vibration amplitude.

14. The apparatus according to claim 12, wherein:

the controller is configured to electronically store in computer memory data representing most-recent voltage levels at the vibration amplitude setpoints for the first sequence of counting phases; and

the controller uses such data in follow-on counting and dispensing operations to control the vibration amplitude of the at least one electrically-controlled vibrator during such follow-on counting and dispensing operations.

15. The apparatus according to claim 12, wherein:

the follow-on counting and dispensing operations are logically partitioned into a second sequence of counting phases each corresponding to different counting phases of the first sequence; and

during a respective counting phase of the second sequence, the controller uses the data representing the most-recent voltage level at the vibration amplitude setpoint for the corresponding counting phase of the first sequence to initially control the at least one electrically-controlled vibrator.

16. The apparatus according to claim 11, wherein:

the first sequence of counting phases includes a counting phase, a slow-down counting phase, a last 2-count counting phase, and a last 1-count counting phase.

17. The apparatus according to claim 16, wherein:

the controller is configured to transition from the counting phase to the slow-down counting phase when the cumulative number of counted and dispensed tablets is greater than or equal to a threshold value.

18. The apparatus according to claim 17, wherein:

the threshold value can be determined from one or more parameters stored in the look-up table for the respective table size class.

19. The apparatus according to claim 16, wherein:

the controller is configured to transition from the slow-down counting phase to the last 2-count counting phase when a difference between the target number of tablets to be counted and dispensed and the cumulative number of counted and dispensed tablets is 3; and

the controller is configured to transition from the last 2-counting phase to a last 1-count counting phase when the difference between the target number of tablets to be counted and dispensed and the cumulative number of counted and dispensed tablets is 2.

20. The apparatus according to claim 19, wherein:

in the last 1-count counting phase, the controller is configured to perform an overcount condition processing when the cumulative number of counted and dispensed tablets is greater than the target number of tablets to be counted and dispensed, and the controller is configured to perform a correct count condition processing when the cumulative number of counted and dispensed tablets is equal to the target number of tablets to be counted and dispensed.

21. The apparatus according to claim 1, wherein:

the tablet feeder comprises a feed bowl having the output opening, wherein the feed bowl undergoes controlled vibration by the at least one electrically-controlled vibrator such that singulated flow of tablets exits the output opening.

2-4. -4. (canceled)