Device for dispensing caps useful in system and method for dispensing prescriptions
A device for singulating open-ended caps includes: a housing configured to retain a plurality of open-ended caps, the housing having an open lower end; an outer ring positioned below the housing; a drum fixed to and positioned within the outer ring to form a drum assembly, the drum including a hub having a substantially circular wall and a platform that extends radially outwardly from the wall to contact the outer ring, the hub and outer ring forming a circular gap therebetween, the platform being positioned below much of the gap and including a discontinuity; a mounting structure with an exit aperture fixed relative to the housing; and a rotary drive unit mounted to the drum that rotates the drum assembly about an axis of rotation.
1. A device for singulating open-ended caps, the device comprising:
a housing configured to retain a plurality of open-ended caps, the housing having an open lower end;
an outer ring positioned below the housing;
a drum fixed to and positioned within the outer ring to form a drum assembly, the drum including a hub having a substantially circular wall and a platform that extends radially outwardly from the wall to contact the outer ring, the hub and outer ring forming a circular gap therebetween, the platform being positioned below much of the gap and including a discontinuity;
a mounting structure with an exit aperture fixed relative to the housing; and
a rotary drive unit mounted to the drum that rotates the drum assembly about an axis of rotation;
wherein the outer ring includes first and second mating structures, the first mating structure being positioned on the outer ring above the second mating structure, wherein the first mating structure is positioned to mate with a mating structure of a drum having a platform located a first distance from the lowermost edge of the hub wall, and the second mating structure is positioned to mate with a mating structure of a drum having a platform located a second distance from the lowermost edge of the hub wall.
2. The device defined in claim 1 , wherein the hub and platform are formed as a unitary member.
3. The device defined in claim 2 , wherein the drum is formed of a polymeric material.
4. The device defined in claim 1 , wherein the drum assembly is mounted such that the axis of rotation forms an angle of between about 40 and 50 degrees relative to horizontal.
5. The device defined in claim 1 , wherein the mounting structure further comprises a pre-staging platform fixed relative to the housing and positioned such that rotation of the drum assembly about the axis of rotation positions the discontinuity above the pre-staging platform.
6. The device defined in claim 1 , wherein the drum includes a generally cone-shaped section that is positioned above the wall of the hub.
7. The device defined in claim 1 , wherein the platform of the drum contacts the first mating structure of the outer ring.
8. The device defined in claim 1 , wherein the platform of the drum contacts the second mating structure of the outer ring.
9. The device defined in claim 1 , wherein the drum assembly further includes an agitation slat that extends generally parallel with the wall of the hub.
10. The device defined in claim 1 , wherein the drum assembly further comprises a ramp that slopes downwardly from an upper edge of the hub wall into the gap.
11. The device defined in claim 1 , wherein the outer ring includes a radially inwardly-extending rim, the rim being sized so that an open-ended cap of a predetermined size is able to enter the gap if the open end of the cap is facing the hub, but is unable to enter the gap if the closed end of the cap is facing the hub.
12. The device defined in claim 1 , wherein the hub includes a radially-extending vertical wall adjacent the discontinuity, the vertical wall positioned to convey a cap in the gap to the exit aperture.