1-18. (canceled)
19. A roller bearing assembly comprising:
first and second arcuate bearing races, the first bearing race having a first set of gear teeth and the second bearing race having a second set of gear teeth opposed to the first set of gear teeth;
a first toothed gear positioned between the first and second bearing races and interengaging the first and second sets of gear teeth;
a first gear support coupled with the first gear;
a second toothed gear positioned between the first and second bearing races and interengaging the first and second sets of gear teeth;
a second gear support coupled with the second gear; and
a plurality of rollers positioned between the first and second bearing races;
wherein the first and second gear supports are spaced apart to define ends of a pocket containing the plurality of rollers.
20. The roller bearing assembly of claim 19 wherein the first bearing race has a first bearing surface in contact with the rollers and the second bearing race has a second bearing surface in contact with the rollers.
21. The roller bearing assembly of claim 20 wherein the first set of gear teeth are pierced through the first bearing surface and the second set of gear teeth are pierced through the second bearing surface such that the first and second sets of gear teeth do not interfere with the first and second bearing surfaces.
22. The roller bearing assembly of claim 20 wherein the first set of gear teeth extend from the first bearing surface toward the second bearing race and the second set of gear teeth extend from the second bearing surface toward the first bearing race.
23. The roller bearing assembly of claim 22 wherein the plurality of rollers includes at least one reduced diameter roller configured to travel between the first and second sets of gear teeth.
24. The roller bearing assembly of claim 20 wherein the first bearing race includes a first flange extending from the first bearing surface toward the second bearing race and the second bearing race includes a second flange extending from the second bearing surface toward the first bearing race in alignment with the first flange.
25. The roller bearing assembly of claim 24 further comprising a third flange extending from the first bearing surface toward the second bearing race and spaced from the first flange and a fourth flange extending from the second bearing surface toward the first bearing race in alignment with the third flange and wherein the plurality of rollers are retained between the first and third flanges and between the second and fourth flanges.
26. The roller bearing assembly of claim 25 wherein the gear supports are positioned between the first and second bearing races and the first and third flanges are crimped toward one another about the gear supports and the second and fourth flanges are crimped toward one another about the gear supports to retain the first and second bearing races together.
27. The roller bearing assembly of claim 25 wherein a first retention slot extends between the first flange and the first bearing surface, a second retention slot extends between the third flange and the first bearing surface, a third retention slot extends between the second flange and the second bearing surface, and a fourth retention slot extends between the fourth flange and the second bearing surface, and wherein the first gear support includes four axially extending tabs positioned between the first and second bearing races with each tab received in a respective one of the first, second, third and fourth retaining slots.
28. The roller bearing assembly of claim 27 wherein the first gear support includes a deflection slot adjacent each axially extending tab to provide for deflection of the tabs past the respective flanges during assembly.
29. The roller bearing assembly of claim 20 wherein the gear supports are each configured to support a shaft that supports the respective gear.
30. The roller bearing assembly of claim 20, wherein adjacent rollers of the plurality of rollers abut one another.
31. The roller bearing assembly of claim 20, wherein the plurality of rollers are supported between the gear supports without a roller cage.
32. The roller bearing assembly of claim 19 wherein the first and second bearing races each extend over an arc of at least approximately 180\xb0.
33. The roller bearing assembly of claim 32 wherein the first and second bearing races each extend over an arc of approximately 360\xb0.
34. A roller bearing assembly comprising:
first and second arcuate bearing races, the first bearing race having a first set of gear teeth and the second bearing race having a second set of gear teeth opposed to the first set of gear teeth, wherein the first set of gear teeth are pierced through a first bearing surface in the first bearing race and the second set of gear teeth are pierced through a second bearing surface in the second bearing race such that the first and second sets of gear teeth do not interfere with the first and second bearing surfaces;
a first toothed gear positioned between the first and second bearing races and interengaging the first and second sets of gear teeth;
a first gear support coupled with the first gear;
a second toothed gear positioned between the first and second bearing races and interengaging the first and second sets of gear teeth;
a second gear support coupled with the second gear; and
a plurality of rollers positioned between the first and second bearing races on the first and second bearing surfaces;
wherein the first and second gear supports are spaced apart to define ends of a pocket containing the plurality of rollers.
35. The roller bearing assembly of claim 34 wherein the gear supports are each configured to support a shaft that supports the respective gear.
36. The roller bearing assembly of claim 34, wherein adjacent rollers of the plurality of rollers abut one another.
37. The roller bearing assembly of claim 34, wherein the plurality of rollers are supported between the gear supports without a roller cage.
38. The roller bearing assembly of claim 34, wherein the first bearing race includes a first flange extending from the first bearing surface toward the second bearing race, the second bearing race includes a second flange extending from the second bearing surface toward the first bearing race in alignment with the first flange, the first bearing race includes a third flange extending from the first bearing surface toward the second bearing race, and the second bearing race includes a fourth flange extending from the second bearing surface toward the first bearing race in alignment with the third flange;
wherein the plurality of rollers are retained between the first and third flanges and between the second and fourth flanges; and
wherein a first retention slot extends between the first flange and the first bearing surface, a second retention slot extends between the third flange and the first bearing surface, a third retention slot extends between the second flange and the second bearing surface, and a fourth retention slot extends between the fourth flange and the second bearing surface, and wherein the first gear support includes four axially extending tabs positioned between the first and second bearing races with each tab received in a respective one of the first, second, third and fourth retaining slots.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of producing one or more electronic switching devices, each switching device comprising a semiconductor channel between two electrodes, and a dielectric element separating said semiconductor channel from a switching electrode, the method comprising: depositing onto a substrate a layer of material for at least partly forming said semiconductor channel or said dielectric element of said one or more switching devices by transferring said material onto said substrate from a rotating first roller, comprising selectively depositing said material onto selected regions of said substrate to form a patterned layer in a single rotation of said first roller.
2. The method according to claim 1, wherein the layer deposited on the substrate exhibits a thickness non-uniformity of less than about 7%.
3. The method according to claim 1, wherein the thickness non-uniformity of said patterned layer over the combined area of said patterned layer is less than about 7%.
4. The method according to claim 1, wherein the substrate defines a plurality of patterned conductive layers in respective selected regions of the substrate, and said patterned layer of material provides a respective layer of said material over each of said patterned conductive layers.
5. The method according to claim 4, wherein each of said patterned conductive layers defines a respective array of source-drain electrode pairs for a respective array of transistors, or a respective array of gate lines for a respective array of transistors.
6. A method of producing one or more electronic switching devices, each switching device comprising a semiconductor channel between two electrodes, and a dielectric element separating said semiconductor channel from a switching electrode, the method comprising: depositing onto a substrate a layer of material for at least partly forming said semiconductor channel or said dielectric element of said one or more switching devices by transferring said material onto said substrate from a rotating first roller, further comprising applying said material to a second roller and transferring said material from said second roller to said first roller whilst rotating the first and second rollers, and controlling the tangential speed of the second roller such that the rear edge of said material transferred from said first roller onto the substrate has a thickness substantially no greater than the average thickness of the remainder of the layer deposited onto the substrate.
7. The method according to claim 6, comprising transferring said material from said second roller to said first roller whilst rotating the second roller at a greater tangential speed than said first roller.
8. The method according to claim 7, wherein the tangential speed of the second roller is between about 2% and about 5% greater than the tangential speed of the first roller.
9. A method of producing one or more electronic switching devices, each switching device comprising a semiconductor channel between two electrodes, and a dielectric element separating said semiconductor channel from a switching electrode, the method comprising: depositing onto a substrate a layer of material for at least partly forming said semiconductor channel or said dielectric element of said one or more switching devices by transferring said material onto said substrate from a rotating first roller, wherein the surface of the first roller defines a plurality of parallel grooves for receiving and holding said material; and further comprising cleaning the first roller by passing one or more cleaning solvents over the first roller in a direction perpendicular to said parallel grooves.
10. A method of producing one or more electronic switching devices, each switching device comprising a semiconductor channel between two electrodes, and a dielectric element separating said semiconductor channel from a switching electrode, the method comprising: depositing onto a substrate a layer of material for at least partly forming said semiconductor channel or said dielectric element of said one or more switching devices by transferring said material onto said substrate from a rotating first roller, wherein said first roller comprises a surface mat for receiving said material, and wherein said mat exhibits swelling by said material of no more than 30%.
11. A method of producing one or more electronic switching devices, each switching device comprising a semiconductor channel between two electrodes, and a dielectric element separating said semiconductor channel from a switching electrode, the method comprising: depositing onto a substrate a layer of material for at least partly forming said semiconductor channel or said dielectric element of said one or more switching devices by transferring said material onto said substrate from a rotating first roller, wherein said first roller comprises a surface mat for receiving said material; said material comprises a solvent; and said mat exhibits swelling by said solvent of no more than 30%.