초록 ▼

Containers are conveyed through an oven on a conveyor to cause a foamable material on each container to foam and become a heat insulative layer. The containers are supported on respective holders of the conveyor, which prevent the containers from contacting one another. Preferably, the holders suppo

Containers are conveyed through an oven on a conveyor to cause a foamable material on each container to foam and become a heat insulative layer. The containers are supported on respective holders of the conveyor, which prevent the containers from contacting one another. Preferably, the holders support the containers loosely, to enable the containers to wobble relative to the holders under the influence of oven air currents and conveyor vibration. The holders thus do not make contact with any given point on their respective containers for a time period that is sufficient to enable the holders to draw enough heat away from the container to adversely affect the foaming operation. The containers are conveyed in single file, along a serpentine path through the oven.

대표청구항 ▼

[ What is claimed:] [1.]1. An apparatus for producing heat-insulating composite paper containers comprising:an oven producing currents of heated air;a conveyor for conveying a plurality of fabricated containers through the oven to cause a foamable material to foam on a surface of each fabricated con

[ What is claimed:] [1.]1. An apparatus for producing heat-insulating composite paper containers comprising:an oven producing currents of heated air;a conveyor for conveying a plurality of fabricated containers through the oven to cause a foamable material to foam on a surface of each fabricated container, the conveyor including a plurality of spaced apart holders for supporting respective fabricated containers, each holder configured for supporting its respective fabricated container in a loose manner, enabling the fabricated container to freely wobble relative to its holder under the influence of conveyor vibration and air currents within the oven, while preventing the fabricated container from making contact with any other fabricated container within the oven;wherein each holder supports its respective container in a substantially vertical orientation;wherein each of the holders includes an upstanding portion extending through a mouth of a respective fabricated container;wherein each holder supports its respective fabricated container in an inverted state, with the upstanding portion extending upwardly through the mouth of the fabricated container;wherein each holder further includes a generally horizontal shoulder portion located below an upper end of each upstanding portion for directly supporting a rim of the mouth of a respective fabricated container.