Collapsible tube structure
AssigneeColgate-Palmolive Company
InventorRussell Park McGhie
Life of this patent
Estimating the term…
Abstract
A collapsible tube assembly comprises a flexible tubular body of ductile metal, plastic or a lamination thereof, and a dispensing head structure of relatively stiff solid non-metallic plastic comprising inner and outer nested elements each having an annular shoulder and an annular longitudinal skirt, an annular end region of the body being inwardly turned to be clamped longitudinally between said shoulders and an adjacent annular portion of the body being frictionally radially clamped between the skirts.
Claims4
A collapsible tube assembly comprising a tubular body having a flexible side wall that includes a sheet of ductile metal coextensive throughout, a dispensing head structure of relatively stiff solid non-metallic synthetic plastics material at one end of said body, said head structure comprising an integral inner element composed of relatively hard synthetic plastics material having an annular tapered shoulder and an annular skirt around the larger end of the shoulder having an external smooth cylindrical surface extending longitudinally from an annular corner junction with the outer periphery of said shoulder, said body at one end having a longitudinally extending cylindrical wall region of appreciable area closely surrounding said cylindrical skirt surface and terminating in an annular end region inwardly turned over said junction to overlie the outer surface of said shoulder in a substantially dead fold crimped condition, and an integral outer element of said head structure composed of a relatively resilient synthetic plastic material having an annular tapered shoulder closely overlying said shoulder of the inner head element to clamp said crimped inturned body end region between said shoulders to anchor said body against longitudinal separation from said head structure, a reduced diameter hollow neck projecting axially from the smaller end of the shoulder of said outer head element, a hollow neck projecting axially from the smaller end of the shoulder of said inner element axially forced into a tight smooth surfaced friction fit within and lining said neck of the outer head element, and a longitudinally extending annular skirt around the larger end of the shoulder having an internally smooth cylindrical surface extending longitudinally from an annular corner junction with the outer periphery of the shoulder of said outer head element closely surrounding said cylindrical wall region of the body, said skirts being longitudinally coextensive for a sufficient distance from their respective shoulder junctions to define a longitudinal space between them of constant thickness wherein said cylindrical wall region of the body is tightly radially clamped with a force fit to provide a fluid tight seal independent of the anchor between said shoulders.
A collapsible tube assembly comprising a flexible tubular body having a coextensive layer of ductile metal and a dispensing head structure secured upon one end of said body, said head structure comprising an integral inner hollow head element composed of relatively hard synthetic plastics material having an inclined annular shoulder, a reduced diameter nozzle lining section projecting longitudinally from the inner periphery of said shoulder, an annular skirt projecting longitudinally from the outer periphery of said shoulder and a narrow annular external flange at the free end of said skirt, and an outer hollow head element composed of a relatively resilient synthetic plastics material disposed in tight substantially nested relation with said inner element, said outer element having an annular shoulder of corresponding inclination with and surrounding the annular shoulder of said inner element, a longitudinally extending nozzle section surrounding said lining section of the inner element with a smooth surfaced friction tight fit, and a longitudinally extending skirt surrounding the skirt of the inner element with the outer diameter of the skirt of said outer element being substantially equal to the outer diameter of said body one end whereby said tube body and outer head element appear to be peripherally continuous, said body one end extending over said external flange and then being bent inwardly at an angle in a first annular portion, then extending longitudinally between said skirts and then being bent inwardly at a second annular portion to pass between said shoulders to terminate in an annular crimped dead fold region axially clamped between said shoulders tightly whereby said tube body and head structure are so mechanically interlocked as to resist axial separation of the tube body and head structure due to normal axial pull.
Dependencies are inferred from the claim text.