What is claimed is:
1. A flexible container comprising:
two webs sealed with respect to each other to form a void between said webs, each said web having at least two layers, a first web of said webs having a first thickness, said first web having a closure area, in at least a portion of said closure area said first web having a second thickness which is less than said first thickness, said first web having an opening at said closure area, and a layer of adhesive applied to said first web at said closure area.
2. The flexible container according to claim 1, wherein at said closure area said first web has a cutout area, and a fold layer is sealed to said first web at said cutout area.
3. The flexible container according to claim 2, wherein said fold layer is heat sealed to said first web.
4. The flexible container according to claim 2, wherein said fold layer is integrated with said first web.
5. The flexible container according to claim 1, further comprising a cover strip applied to said adhesive layer, wherein said adhesive layer is sandwiched between said closure area of said first web and said cover strip.
6. The flexible container according to claim 1, wherein said webs are sealed about a periphery of the flexible container.
7. The flexible container according to claim 1, wherein a first layer of said at least two layers is coextensive with a second layer of said at least two layers.
8. The flexible container according to claim 1, wherein said opening provides access to said void.
9. The flexible container according to claim 1, wherein said at least two layers comprise a first layer of a polyester or nylon material and a second layer of a polyethylene material.
10. The flexible container according to claim 1, wherein said opening comprises a slit positioned along a fold line passing through said closure area.
11. The flexible container according to claim 10, wherein near at least one of opposing end portions of said slit at least one of said webs has a structural relief.
12. The flexible container according to claim 11, wherein said structural relief comprises at least one of said layers of at least one of said webs having a reduced thickness at said fold line.
13. The flexible container according to claim 11, wherein said structural relief comprises at least one of said layers of at least one of said webs having a notched area.
14. The flexible container according to claim 13, wherein a material of said at least one said layer is removed at said notched area.
15. The flexible container according to claim 13, wherein said notched area extends at least partially between an outer edge of the flexible container and at least one of said end portions of said slit.
16. The flexible container according to claim 13, wherein said notched area extends inward from an outer edge of the flexible container, beyond one of said end portions of said slit.
17. The flexible container according to claim 13, wherein said webs are sealed with respect to each other with a heat seal, and said notched area extends into said heat seal.
18. The flexible container according to claim 11, wherein said structural relief comprises a second slit within each of said at least one of said webs.
19. The flexible container according to claim 11, wherein said structural relief comprises a score line within each of said at least one of said webs.
20. The flexible container according to claim 1, further comprising a secondary first web positioned adjacent said first web on one side of the flexible container.
21. A flexible container comprising:
two webs sealed with respect to each other to form a void between said webs, each said web having at least two layers, said first web having an opening at a closure area, a layer of adhesive applied to said first web at said closure area, and near said opening at least one of said webs having a structural relief.
22. The flexible container according to claim 21, wherein said opening is positioned along a fold line passing through said closure area.
23. The flexible container according to claim 22, wherein said opening comprises a slit.
24. The flexible container according to claim 22, wherein said structural relief comprises at least one of said layers of at least one of said webs having a reduced thickness at said fold line.
25. The flexible container according to claim 21, wherein said structural relief comprises at least one of said layers of at least one of said webs having a notched area.
26. The flexible container according to claim 25, wherein a material of said at least one said layer is removed at said notched area.
27. The flexible container according to claim 25, wherein said notched area extends at least partially between an outer edge of the flexible container and at least one of opposing end portions of said opening.
28. The flexible container according to claim 25, wherein said notched area extends inward from an outer edge of the flexible container, beyond one of said end portions of said slit.
29. The flexible container according to claim 25, wherein said webs are sealed with respect to each other with a heat seal, and said notched area extends into said heat seal.
30. The flexible container according to claim 21, wherein said structural relief comprises a second slit within each of said at least one of said webs.
31. The flexible container according to claim 21, wherein said structural relief comprises a score line within each of said at least one of said webs.
32. The flexible container according to claim 21, a first web of said webs has a first thickness, and in said closure area said first web having a second thickness which is less than said first thickness.
33. The flexible container according to claim 21, wherein at said closure area said first web has a cutout area, and a fold layer is sealed to said first web about said cutout area.
34. The flexible container according to claim 33, wherein said fold layer is heat sealed to said first web.
35. The flexible container according to claim 33, wherein said fold layer is integrated with said first web.
36. The flexible container according to claim 21, further comprising a cover strip applied to said adhesive layer, wherein said adhesive layer is sandwiched between said closure area of said first web and said cover strip.
37. The flexible container according to claim 21, wherein said webs are sealed about a periphery of the flexible container.
38. The flexible container according to claim 21, wherein a first layer of said at least two layers is coextensive with a second layer of said at least two layers.
39. The flexible container according to claim 21, wherein said opening provides access to said void.
40. The flexible container according to claim 21, further comprising a secondary first web positioned adjacent said first web on one side of the flexible container.
41. A flexible container comprising:
two webs sealed with respect to each other to form a void between said webs, each said web having at least two layers, said first web having an opening at a closure area, a layer of adhesive applied to said first web at said closure area, and within at least a portion of said closure area at least one of said webs having an area of weakening near said opening.
42. The flexible container according to claim 41, wherein said opening is a slit.
43. The flexible container according to claim 42, wherein near at least one of opposing end portions of said slit at least one of said webs has a structural relief.
44. The flexible container according to claim 41, wherein said area of weakening comprises at said closure area said first web having a cutout area, and a fold layer sealed to said first web about said cutout area.
45. The flexible container according to claim 41, wherein said area of weakening comprises a first web of said webs having a first thickness, and in said closure area said first web having a second thickness which is less than said first thickness.
46. The flexible container according to claim 41, wherein said area of weakening comprises near said opening at least one of said webs having a structural relief.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. An optical switching element, comprising:
a multi-layered optical switching layer that contains a charge generation layer and a charge transport layer; or
a mono-layered optical switching layer that has a charge generating function and a charge transporting function,
wherein the charge transport layer or the mono-layered optical switching layer contains a charge transporting material represented by the following general formula (1):
13
wherein R1 and R3 each independently represent CH3 or C2H5, and R2 and R4 each independently represent H, CH3 or C2H5.
2. The optical switching element of claim 1, wherein the charge transporting material is contained in the charge transport layer at a concentration of 30% to 90% by weight.
3. The optical switching element of claim 1, wherein the charge transporting material is contained in the charge transport layer at a concentration of 45% to 80% by weight.
4. The optical switching element of claim 1, wherein the charge transporting material is contained in the charge transport layer at a concentration of 50% to 70% by weight.
5. A device, comprising:
the optical switching element of claim 1; and
a functional element electrically connected to the optical switching element.
6. A photoaddressable display medium, comprising:
a pair of electrodes, at least one of which has optical transparency;
the optical switching element of claim 1; and
a display element including a display layer having a memory effect, wherein
the optical switching element and the display element are laminated between the pair of electrodes.
7. The photoaddressable display medium of claim 6, wherein the display element is a color display element having a plurality of display layers, and each of the plurality of display layers is a cholesteric liquid crystal display layer that selectively reflects visible light beams of a color that is different from the color of the visible light beams selectively reflected by any other one of the plurality of display layers.
8. A display device, comprising:
the photoaddressable display medium of claim 7;
a unit for driving the display medium; and
a unit for optically writing to the display medium.
9. The optical switching element of claim 1, wherein the charge transporting material represented by general formula (1) is a charge transporting material represented by the following general formula (2):
14
wherein R1 and R3 each independently represent CH3 or C2H5, and R2 and R4 each independently represent H, CH3 or C2H5.
10. A device, comprising:
the optical switching element of claim 9; and
a functional element electrically connected to the optical switching element.
11. A photoaddressable display medium, comprising:
a pair of electrodes, at least one of which has optical transparency;
the optical switching element of claim 9; and
a display element including a display layer having a memory effect, wherein
the optical switching element and the display element are laminated between the pair of electrodes.
12. The photoaddressable display medium of claim 11, wherein the display element is a color display element having a plurality of display layers, and each of the plurality of display layers is a cholesteric liquid crystal display layer that selectively reflects visible light beams of a color that is different from the color of the visible light beams selectively reflected by any other one of the plurality of display layers.
13. A display device, comprising:
the photoaddressable display medium of claim 12;
a unit for driving the display medium; and
a unit for optically writing to the display medium.
14. The optical switching element of claim 9, wherein R1 and R3 each represent CH3, and R2 and R4 each represent C2H5.
15. A device, comprising:
the optical switching element of claim 14; and
a functional element electrically connected to the optical switching element.
16. A photoaddressable display medium, comprising:
a pair of electrodes, at least one of which has optical transparency;
the optical switching element of claim 14; and
a display element including a display layer having a memory effect, wherein
the optical switching element and the display element are laminated between the pair of electrodes.
17. The photoaddressable display medium of claim 16, wherein the display element is a color display element having a plurality of display layers, and each of the plurality of display layers is a cholesteric liquid crystal display layer that selectively reflects visible light beams of a color that is different from the color of the visible light beams selectively reflected by any other one of the plurality of display layers.
18. A display device, comprising:
the photoaddressable display medium of claim 17;
a unit for driving the display medium; and
a unit for optically writing to the display medium.