1. (canceled)
2. An LED lighting assembly, comprising:
a bifurcated light guide configured to propagate light by total internal reflection, the bifurcated light guide comprising:
a light input edge extending along a width direction;
a bifurcation region extending along the width direction, the bifurcation region displaced from the light input edge along a length direction perpendicular to the width direction; and
first and second light guide portions extending along the width direction and extending from the bifurcation region along the length direction, each light guide portion comprising a proximal end proximate the bifurcation region, a distal end distal the bifurcation region, an outer major surface, and an inner major surface, the inner major surfaces facing toward each other and the outer major surfaces facing away from each other, the distal ends separated from each other in a transverse direction perpendicular to the width direction and the length direction; and
a light source juxtaposed the light input edge to edge light the light guide through the light input edge such that light from the light source enters the light guide portions through the respective proximal ends and propagates along the light guide portions by total internal reflection at the respective inner and outer major surfaces toward the respective distal ends.
3. The LED lighting assembly of claim 2, wherein a curvature of at least one of the light guide portions extending toward the distal end decreases in the transverse direction.
4. The LED lighting assembly of claim 2, wherein a curvature of at least one of the light guide portions extending toward the distal end increases in the transverse direction.
5. The LED lighting assembly of claim 2, wherein at least one of the light guide portions tapers in thickness from the proximal end to the distal end.
6. The LED lighting assembly of claim 2, additionally comprising light extracting elements at at least one of the major surfaces of at least one of the light guide portions, the light extracting elements configured to extract light through at least one of the respective outer major surface and the inner major surface.
7. The LED lighting assembly of claim 2, additionally comprising a light redirecting element juxtaposed the distal end of at least one of the light guide portions, the light redirecting element configured to redirect light output from the distal end.
8. The LED lighting assembly of claim 2, additionally comprising a light redirecting element positioned between the inner major surfaces of the light guide portions, the light redirecting element configured to redirect light output from at least one of the first light guide portion, the second light guide portion, and the bifurcation region.
9. The LED lighting assembly of claim 8, wherein the light redirecting element is diffusive.
10. The LED lighting assembly of claim 2, additionally comprising a reflective surface juxtaposed the outer major surface of at least one of the light guide portions.
11. The LED lighting assembly of claim 2, additionally comprising a housing configured to retain the bifurcated light guide and the light source.
12. The LED lighting assembly of claim 2, wherein the light guide is moveable relative to the light source to vary a position of the light guide relative to the housing and the light source.
13. The LED lighting assembly of claim 12, wherein the light input edge comprises light input regions, at least one of the light input regions associated with an optical modifying characteristic, wherein light emitted from the light source is selectively apportioned between the light input regions so that a characteristic of the light output from the lighting assembly is modified based on the optical modifying characteristic of the at least one of the light input regions and the relative positioning of the light input regions and the light source.
14. The LED lighting assembly of claim 2, wherein the bifurcated light guide is constructed from two or more light guide parts.
15. The LED lighting assembly of claim 2, wherein the light source comprises a solid-state light emitter.
16. A bifurcated light guide configured to propagate light by total internal reflection, the bifurcated light guide comprising:
a light input edge extending along a width direction;
a bifurcation region extending along the width direction, the bifurcation region displaced from the light input edge along a length direction perpendicular to the width direction; and
first and second light guide portions extending along the width direction and extending from the bifurcation region along the length direction, each light guide portion comprising a proximal end proximate the bifurcation region, a distal end distal the bifurcation region, an outer major surface, and an inner major surface, the inner major surfaces facing toward each other and the outer major surfaces facing away from each other, the distal ends separated from each other in a transverse direction perpendicular to the width direction and the length direction.
17. The bifurcated light guide of claim 16, wherein a curvature of at least one of the light guide portions extending toward the distal end decreases in the transverse direction.
18. The bifurcated light guide of claim 16, wherein a curvature of at least one of the light guide portions extending toward the distal end increases in the transverse direction.
19. The bifurcated light guide of claim 16, additionally comprising light extracting elements at at least one of the major surfaces of at least one of the light guide portions, the light extracting elements configured to extract light through at least one of the respective outer major surface and the inner major surface.
20. The bifurcated light guide of claim 16, additionally comprising a light redirecting element juxtaposed the distal end of at least one of the light guide portions, the light redirecting element configured to redirect light output from the distal end.
21. The bifurcated light guide of claim 16, wherein the bifurcated light guide is constructed from two or more light guide parts.
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. In a paper production facility, a system for controlling a temperature of a ceramic element of a supporting or wiping strip assigned to a wire or a felt, the system comprising:
the supporting or wiping strip having at least one channel formed therein;
a feed line communicating with said at least one channel for conducting a carrier medium to the supporting or wiping strip; and
a return line communicating with said at least one channel for conducting the carrier medium away from the supporting or wiping strip; and
mixing valve communicating with said feed line for mixing a temperature carrier medium for heat and a temperature carrier medium for cold.
2. The system according to claim 1, which comprises a temperature sensor disposed in at least one of said feed line andor said return line.
3. The system according to claim 1, which further comprises:
a line system having connected therein a delivery pump for the carrier medium, a heating device for heating the carrier medium, and a cooling device for cooling the carrier medium;
at least one temperature sensor disposed for determining a temperature of the carrier medium flowing away from the supporting or wiping strip; and
a control unit configured to control at least one of said heating device, said cooling device, and said delivery pump.
4. The system according to claim 3, which further comprises at least one temperature sensor disposed to determine a temperature of the carrier medium being supplied to the supporting or wiping strip.
5. The supporting or wiping strip for the system according to claim 1, having at least one channel formed therein for conducting a carrier medium for heat or for cold therethrough.
6. The supporting or wiping strip according to claim 5, which comprises a plurality of ceramic elements defining a supporting surface of said supporting or wiping strip, and wherein said channel passes through said ceramic elements.
7. The supporting or wiping strip according to claim 5, which comprises a plurality of ceramic elements defining a supporting surface of said supporting or wiping strip and a carrier strip carrying said ceramic elements, and wherein said channel is formed between said ceramic elements and said carrier strip.
8. The supporting or wiping strip according to claim 7, wherein said ceramic elements and said carrier strip are formed with at least one channel or with channel portions.
9. The supporting or wiping strip according to claim 5, wherein said supporting or wiping strip is formed with a first and and a second end, and said channel begins at said first end and terminates at said second end.
10. The supporting or wiping strip according to claim 5, wherein said supporting or wiping strip is formed with a longitudinal end, and said channel has a forward portion beginning at said end and a return portion guided back and terminating at said end.
11. The supporting or wiping strip according to claim 10, wherein said forward portion of said channel is connected to said return portion of said channel within the supporting or wiping strip.
12. The supporting or wiping strip according to claim 10, which comprises a piece of pipe disposed externally of the supporting or wiping strip for connecting said forward portion of said channel with said return portion of said channel.