Multi-cavity dispensing container
AssigneeChesebrough-Pond's Inc.
InventorEdwin R. Pettengill
Life of this patent
Estimating the term…
Abstract
A rigid piston-type multi-cavity dispensing container for simultaneous coextrusion of two or more flowable materials in a predetermined proportion, such as multi-component toothpaste and the like which, upon relative compression of the upper and lower body members, produces a single, banded, unmixed stream of material. The container has a unique outlet which is arranged to cause the outlet streams of material to flow towards each other. The outlet maintains the segregation of the different materials as they move simultaneously outward through the outlet.
Claims16
A multi-cavity dispensing continer for the coextrusion of at least two flowable materials, comprising:
- a dispensing container comprising at least two hollow and separate parallel cylinders, each cylinder for containing one of said flowable materials, said cylinders having a first generally closed end and a second end telescopically and slidingly accommodating at least two parallel pistons which conform to ride sealingly along the interior walls of said cylinders so as to force said flowable materials to flow toward said first end of said cylinder upon relative compression of the cylinders and pistons, said cylinders having outlet channels;
- and
- an outlet means in fluid communication with said outlet channels, said outlet means having a peripheral wall and being divided by at least one flat tapered septum assembly extending from said outlet channels and extending to or beyond the end of said outlet means to completely separate said flowable materials within said outlet means while being dispensed and to cause said materials to be dispensed in a single unmixed stream;
- said outlet means includes smooth peripheral walls and wherein said tapered septum is textured so as to possess a dull finish.
A multi-cavity dispensing container for the coextrusion of at least two flowable materials, comprising:
- a dispensing container comprising at least two hollow and separate parallel cylinders, each cylinder for containing one of said flowable materials, said cylinders having a first generally closed end and a second end telescopically and slidingly accommodating at least two parallel pistons which conform to ride sealingly along the interior walls of said cylinders so as to force said flowable materials to flow toward said first end of said cylinder upon relative compression of the cylinders and pistons, said cylinders having outlet channels;
- an outlet means in fluid communication with said outlet channels, said outlet means having a peripheral wall and being divided by at least one flat tapered septum assembly extending from said outlet means to completely separate said flowable materials within said outlet means while being dispensed and to cause said materials to be dispensed in a single unmixed stream;
- and
- a cap member for covering said outlet, said cap member including recesses conforming closely to the cross-sectional boundaries of said outlet passages formed by said peripheral wall and said septum whereby cross-mixing of said materials is prevented when said outlet is covered by said cap member.
In a dispensing container having multiple cylinders and multiple pistons for being received in said cylinders, the improvement comprising:
- a first shroud incorporating said cylinders;
- and a second shroud connected to and surrounding said pistons, said first shroud being arranged to closely conform in sliding relation within said second shroud and surrounding said pistons whereby relative motion between said shrouds is constrained to be substantially linear by said shrouds, thereby providing equal linear motions of said pistons into said cylinders;
- wherein each of said first and second shrouds have conforming longitudinal guide members for guiding said linear motion comprising an outwardly extending rectangular longitudinal rdige on said first shroud having a flat outwardly facing surface and parallel side walls and an interior rectangular longitudinal groove on said second shroud having a flat inwardly facing surface and parallel side walls for receiving said ridge.
A multi-cavity dispensing container for the coextrusion of at least two flowable materials, comprising:
- a dispensing container comprising at least two hollow and separate parallel cylinders, each cylinder for containing one of said flowable materials, said cylinders having a first generally closed end and a second end telescopically and slidingly accommodating at least two parallel pistons which conform to ride sealingly along the interior walls of said cylinders so as to force said flowable materials to flow toward said first end of said cylinder upon relative compression of the cylinders and pistons, said cylinders having outlet channels;
- and
- an outlet means in fluid communication with said outlet channels, said outlet means including adjacent outlet openings unconnected to each other and having means for causing said flowable materials to flow toward each other at said outlet openings to form a single, banded, unmixed stream of said materials outside of said outlet wherein said means for causing said flowable materials to flow toward each other comprises providing said outlet means with surfaces having treater resistance to material flow near said outlet openings on interior surfaces of said outlet means which are adjacent other outlet openings than on peripheral interior surfaces of said outlet means.
A multi-cavity dispensing container as specified in cliam 12 wherein said greater resistance is provided by providing friction reducing coating on said peripheral interior surfaces.
Dependencies are inferred from the claim text.