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US 5,858,153 AGranted
Method for making tubular containers
AssigneeColgate-Palmolive Company
InventorRobert Mack
Life of this patent
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AssigneeColgate-Palmolive Company
InventorRobert Mack
Estimating the term…
In the manufacture of multichamber tubular containers it has been found that the inner divider walls should be bonded to the exterior wall by means of a band sealing method. In the band sealing method there is a band that contacts the upper film and a band that contacts the lower film that are to be bonded. In the present processes the upper band contacts the inner divider wall while the lower band contacts the exterior surface of the outer wall of the tubular container. In order to prevent the marring or otherwise putting a defect into the exterior surface of the outer wall the temperature of the lower band is maintained at a lower temperature than the upper band. This will decrease the temperature of the exterior surface of the outer wall and prevent imperfections in the exterior surface of the outer wall. The advantage is a multichamber tubular container without any imperfections in the exterior surface. This enhances the overall appearance of the tubular container.
A method for making multichamber tubular containers comprising overlaying at least a second film onto a first film and sealing the longitudinal edges of said second film to said first film, contacting the longitudinal edges of said first film and sealing said longitudinal edges of said first film together to form a tubular body with said first film disposed across said tubular body to form at least two separate chambers, and attaching an exit nozzle to one end of said tubular body, the improvement comprising sealing the longitudinal edges of said second film onto said first film by means of band sealing, a band in contact with said first film being at a lower temperature than a band in contact with said second film.
A method for making multichamber tubular containers comprising overlaying at least a second film onto a first film and sealing the longitudinal edges of said second film to said first film, contacting the longitudinal edges of said first film and sealing said longitudinal edges of said first film together to form a tubular body, and attaching an exit nozzle to one end of said tubular body with said first film disposed across said tubular body to form at least two separate chambers, the improvement component comprising sealing the longitudinal edges of said second film onto said first film by means of band sealing, a band in contact with said first film being at a temperature of about 25.degree. C. to about 200.degree. C. lower than a band in contact with said second film.
Dependencies are inferred from the claim text.