Ceramic rolls with metal end caps

Claim 2

For use with heated furnaces a glass sheet conveyor roll of ceramic composition having an axially elongated, substantially cylindrical shape including an intermediate portion of round cross-section for conveying glass sheets for thermal treatment, shafts located in alignment with the ends of said roll, and means for drivingly connecting at least one of said shafts to said roll, said means comprising a metal end cap having a cylindrical inner surface rotatable with one of said shafts, said inner surface having a diameter slightly larger than the diameter of said roll at the corresponding end of said roll, and wedging means interposed between said inner surface and said roll comprising a split, circumferentially expandable and radially compres-sible metal ring having axially extending corrugations, the unstressed radial height of said ring being slightly greater than the difference in radius between the end portion of said roll and the inner surface of said metal end cap when said ring is unstressed, said ring being interposed between said inner cylindrical surface of said metal end cap and the cor-responding end portion of said roll to compress said corrugations radially and provide a tight coupling between said inner cylindrical surface of said metal end cap and the outer surface of said corresponding end portion of said roll.

Claim 3

A glass sheet conveyor roll as in claim 1, wherein said wedging means comprises a pair of said split expandable metal rings wedged between said metal end cap and the corresponding end portion of said roll, said rings being axially spaced from one another.

Claim 4

A glass sheet conveyor roll as in claim 1, wherein said split ring has a circumferential length that is less than the circumference of said end portion of said roll to provide a short circumferentially extending gap between the ends of said split ring when it is compressed radially and expanded circumferentially.

Claim 5

A glass sheet conveying roll as in claim 1, wherein said roll is chamfered at its end to facilitate relative sliding between said ceramic roll and said metal end cap in an axial direction when said split ring is disposed about the end portion of said roll.

Claim 6

A glass sheet conveying roll as in claim 1, wherein said metal end cap has an open inner end that is chamfered to facilitate entry of said ceramic roll within said metal end cap in an axial direction when said split ring is disposed about the end portion of said roll.

Claim 7

A glass sheet conveying roll as in claim 1, having an end cap and wedging means comprising a split, circumferentially expandable radially compressible metal ring similar to said first ring disposed about the other end portion of said conveyor roll in a manner similar to that of claim 1.

Claim 8

A glass sheet conveying roll as in claim 2, having an end cap and wedging means comprising a pair of split, circumferentially expandable radially compressible metal rings similar to those of said first pair dis-posed about the other end portion of said conveyor roll in a manner similar to that of claim 2.

Claim 9

A glass sheet conveyor roll as in claim 1, wherein said axially extending corrugations are located in an axially intermediate portion of said ring flanked by axially outer rims.

Claim 10

A conveyor for conveying glass sheets through a tunnel-like furnace having a relatively hot furnace portion comprising a plurality of longitudinally spaced, transversely extending conveyor rolls, a plurality of said conveyor rolls in said hot furnace portion being of ceramic compo-sition having an axially elongated, substantially cylindrical shape including an intermediate portion of round cross-section for conveying glass sheets for thermal treatment, shafts located in alignment with the ends of each said roll, and means for drivingly connecting at least one of said shafts to said roll, said means comprising a metal end cap having a cylindrical inner surface rotatable with one of said shafts, said inner surface having a diameter slightly larger than the diameter of said roll at the correspond-ing end of said roll, and wedging means interposed between said inner sur-face and said roll comprising a split, circumferentially expandable and radially compressible metal ring having axially extending corrugations, the unstressed radial height of said ring being slightly greater than the differ-ence in radius between the end portion of said roll and the inner surface of said metal end cap when said ring is unstressed, said ring being interposed between said inner cylindrical surface of said metal end cap and the corre-sponding end portion of said roll to compress said corrugations radially and provide a tight coupling between said inner cylindrical surface of said metal end cap and the outer surface of said corresponding end portion of said roll.

Claim 11

A conveyor for conveying glass sheets through a tunnel-like furnace having a relatively hot furnace portion comprising a plurality of longitudinally spaced, transversely extending conveyor rolls, a plurality of said conveyor rolls in said hot furnace portion being of ceramic compo-sition having an axially elongated, substantially cylindrical shape including an intermediate portion of round cross-section for conveying glass sheets for thermal treatment, shafts located in alignment with the ends of each said roll, and means for drivingly connecting at least one of said shafts to said roll, said means comprising a metal end cap having a cylindrical inner surface rotatable with one of said shafts, said inner surface having a diameter slightly larger than the diameter of said roll at the correspond-ing end of said roll, and wedging means interposed between said inner sur-face and said roll comprising a split, circumferentially expandable and radially compressible metal ring having axially extending corrugations, the unstressed radial height of said ring being slightly greater than the differ-ence in radius between the end portion of said roll and the inner surface of said metal end cap when said ring is unstressed, said ring being interposed between said inner cylindrical surface of said metal end cap and the corre-sponding end portion of said roll to compress said corrugations radially and provide a tight coupling between said inner cylindrical surface of said metal end cap and the outer surface of said corresponding end portion of said roll.

Claim 12

A conveyor as in claim 9, wherein said axially extending corrugations are located in an axially intermediate portion of said ring flanked by axially outer rims.

Claim 13

The glass sheet conveyor roll of claim 1, 2 or 3 wherein said ceramic comprises fused silica.

Claim 14

The conveyor of claim 9 or 10 wherein said ceramic comprises fused silica.