Patent ID: 6439438
Filing Date: 2002-08-27
Classification: B05C,B65D

Abstract:
A combination for use in storing and applying moisture curable materials, said combination comprising:a container assembly comprising: a tubular wall of moisture vapor transmissive polymeric material, said tubular wall having an elongate axis, axially spaced inlet and outlet ends, and an inner surface defining a chamber; and a plunger within said tubular wall adjacent said inlet end and adapted to move along said wall toward said outlet end in sealing engagement with said inner surface; a moisture curable material within said chamber, said material having an outer surface, being a solid at normal room temperature, being softenable to a suitable viscosity for application of less than 30,000 centipoise when heated to a temperature in the range of about 140 to 230 degrees Fahrenheit or 60 to 110 degrees Centigrade, and having little adhesion to said polymeric material, even when said adhesive is moisture cured, said moisture curable material being curable inwardly from said outer surface by atmospheric moisture vapor to form a bladder of the cured moisture curable material that will soften but will not melt upon heating in said range, said bladder then extending around a central core of uncured moisture curable material; and an envelope of moisture impermeable material around said container assembly, whereby after the envelope of moisture impermeable material is removed said moisture curable material can be cured inwardly from said outer surface by atmospheric moisture vapor passing through the walls of the container assembly to form the bladder of cured moisture curable material, and after any such bladder and the uncured moisture curable material within the container assembly are heated to a temperature in said range, the bladder can be ruptured so that the plunger can be moved along the wall toward the outlet end of the wall to collapse the ruptured bladder and separate parts of the bladder adjacent the plunger from the container assembly while the heated uncured moisture curable material is discharged through the outlet end of the tubular wall.