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US 4,397,673 AGranted
Composite conveying roll
AssigneePPG Industries, Inc.
InventorStephen Stevens
Life of this patent
Estimating the term…
Abstract
A glass ribbon conveying roll includes cylindrical outer tubular end portions having a plurality of high temperature thermal insulating discs secured thereon and an intermediate tubular portion. The hollow interior of the roll is filled with thermal insulating material. The thermal insulating material within the roll reduces heat transfer through the center of the ribbon and the discs prevent heat loss from the ribbon edges to maintain a relatively flat temperature profile across the ribbon as it advances through an annealing lehr.
Claims10
A conveyor roll for transporting material comprising:
- a cylindrical, intermediate portion including an exterior surface portion wherein said exterior surface portion is formed of a material having a heat transfer coefficient and a circumference;
- an end portion mounted on each end of said intermediate portion, said end portions including:
- a body portion having perimeter less than said circumference;
- and
- at least one thermally insulating disc mounted on said body portion wherein said disc is formed of a material having a heat transfer coefficient less than the heat transfer coefficient of said intermediate portion to provide a roll having heat transfer properties such that heat transfer between said intermediate portion and the material to be transported is greater than the heat transfer between said end portions and the material to be transported;
- and
- means for securing said disc on its respective body portion.
4 more elements
Dependencies are inferred from the claim text.