Method and apparatus for use in packaging a selected number of containers
View Patent ↗A container packaging machine includes a container handling and counting apparatus including an upstream accumulation portion and a downstream container separation and counting portion. The containers having a relatively tightly nested configuration as the containers move through the accumulation portion and having a relatively loosely nested configuration as the containers move through the container separation and counting portion where separation of the containers form distinct peaks and valleys for use in counting the containers.
1. A container packaging machine, comprising:
a container handling and counting apparatus having:
an upstream accumulation portion, as containers move through the accumulation portion they are in a closely nested configuration;
a downstream separation and counting portion in which containers are shifted from the closely nested configuration to a loosely nested configuration such that a rim portion of the containers are spaced apart with the containers remaining nested to facilitate counting; and
a downstream accumulation portion located downstream of the downstream separation and counting portion, the downstream accumulation portion receives the containers from the downstream separation and counting portion and places the containers in a closely nested configuration;
the upstream accumulation portion including a first conveyor system comprising a conveyor belt that moves the containers through the accumulation portion in the closely nested configuration;
the downstream separation and counting portion including a second conveyor system comprising a conveyor belt that receives the containers from the upstream accumulation portion and separates the containers, placing them in the loosely nested configuration and moves the containers through the downstream separation and counting portion in the loosely nested configuration;
the downstream accumulation portion including a third conveyor system comprising a conveyor belt that receives the containers from the downstream separation and counting portion and places the containers in a closely nested configuration;
wherein the conveyor belt of the second conveyor system moves faster than the conveyor belts of the first and third conveyor systems such that the containers are placed in the loosely nested configuration when moving from the first conveyor system to the second conveyor system and are placed in the closely nested configuration when moving from the second conveyor system to the third conveyor system.
2. The machine of claim 1 wherein profiles of the loosely nested containers form distinct peaks at the rim portions and valleys at container wall portions to facilitate counting.
3. The machine of claim 1 wherein the second conveyor system is no more than about 7 percent faster than the velocity of the first conveyor system.
4. The machine of claim 1 further comprising a sensor assembly located at the downstream separation and counting portion that detects the containers as they pass thereby in their loosely nested configuration by detecting the rim portions of the containers.
5. The machine of claim 4 further comprising a controller that tracks a number of containers detected using the sensor assembly.
6. The machine of claim 1 wherein once a predetermined number of containers have been counted and delivered to the downstream accumulation portion, a controller instructs the downstream accumulation portion to separate the predetermined number of containers from the remaining containers.
7. A method of packaging containers, comprising:
(a) conveying containers in a closely nested configuration through an upstream accumulation portion of a container handling apparatus;
(b) separating the containers to a loosely nested configuration where rim portions of adjacent containers are separated when they are conveyed through a downstream separation and counting portion of the container handling apparatus for facilitating counting of the containers, adjacent containers substantially maintaining their loosely nested configuration during their travel through the downstream separation and counting portion without moving relative to each other;
(c) counting the containers passing through the downstream separation and counting portion as the containers remain in their loosely nested configuration; and
(d) renesting the containers to a closely nested configuration only after the containers have been counted, wherein the step of conveying the containers in the closely nested configuration through the upstream accumulation portion of the container handling apparatus includes using an upstream conveyor system and the step of separating the containers to the loosely nested configuration includes using a downstream conveyor system of the downstream separation and counting portion that is arranged and configured to receive containers from the upstream conveyor system; and operating the upstream conveyor system at a slower velocity than the downstream conveyor system to provide separation between adjacent containers as they are engaged by the downstream conveyor system.
8. The method of claim 7 wherein in the loosely nested configuration container profiles form distinct peaks at the rim portions and valleys at container wall portions to facilitate counting.
9. The method of claim 8 further comprising detecting the peaks at the rim portions using a sensor assembly.
10. The method of claim 9 further comprising counting the containers using a controller connected to the sensor assembly.
11. The method of claim 7 further comprising placing the containers in a closely nested configuration at a downstream accumulation portion located downstream of the downstream separation and counting portion.
12. The method of claim 11 further comprising separating a predetermined number of containers at the downstream accumulation portion from the remaining containers after counting the containers at the downstream separation and counting portion.
13. The method of claim 7 , wherein the containers remain nested throughout steps (a)-(d).
14. The method of claim 13 , wherein the containers are cups.
15. A method of packaging containers, comprising:
(a) conveying containers in a closely nested configuration through an upstream accumulation portion of a container handling apparatus using an upstream conveyor system, each container having a rim portion and a tapered container wall portion extending therefrom to an end of the container;
(b) separating the containers to a loosely nested configuration where rim portions of adjacent containers are separated by valley spacings when they are conveyed by a downstream conveyor system through a downstream separation and counting portion of the container handling apparatus for facilitating counting of the containers, adjacent containers substantially maintaining their loosely nested configuration during travel through the downstream separation and counting portion such that at least a portion of the tapered container walls overlap in the loosely nested configuration;
(c) counting the containers passing through the downstream separation and counting portion as the containers remain in their loosely nested configuration, the counting utilizing an optical sensor assembly with a detector located in position above the valleys but below the rim portions to detect the presence of rim portions moving thereby; and
(d) renesting the containers to a closely nested configuration only after the containers have been counted, wherein the upstream conveyor system used in step (a) is operated at a slower velocity than the downstream conveyor system used in step (b).