1. An apparatus for supplying a raw material for use in growing a single crystal by the CZ method, which is applied for an additional charging or recharging the solid raw material in granular form into a molten raw material in the crucible, the apparatus comprising:
a raw material supply tube in cylindrical form to be fllled with said solid raw material;
a releasable conical bottom lid disposed at the lower end aperture of said raw material supply tube;
a metallic support member which is covered with a sheath tube, runs through the inside space of said raw material supply tube to be connected with said bottom lid at the end, which enabling said bottom lid to descend and enabling said raw material supply tube as well as said bottom lid to ascend;
an engaging-component to make the descending movement of said raw material supply tube to come to a halt; and
a pulling means which enables said raw material supply tube and bottom lid to ascenddescend in suspension by means of said metallic support member,
wherein the lower end aperture of said raw material supply tube can be released to open and said solid raw material can be supplied into the molten raw material in the crucible.
2. An apparatus for supplying raw material according to claim 1, further comprising one or a plurality, namely two or more, of metallic support members which are disposed within the inside space of the raw material supply tube, wherein, in case that a single metallic support member alone is disposed, it is connected with said bottom lid at its center position, and in case that a plurality of metallic support members are disposed, those are connected with said bottom lid at its circumferential positions apportioned equally.
3. An apparatus for supplying raw material according to claim 2, wherein said sheath tube comprises a protective sheath tube for directly covering said metallic support member and a sliding sheath tube that is inserted so as to enable the sliding movement of said protective sheath tube.
4. An apparatus for supplying raw material according to claim 1, further comprising means for ascendingdescending said raw material supply tube so as to synchronize with ascendingdescending movement of said metallic support member intended for making said raw material supply tube to ascenddescend.
5. An apparatus for supplying raw material according to claim 4, wherein said sheath tube comprises a protective sheath tube for directly covering said metallic support member and a sliding sheath tube that is inserted so as to enable the sliding movement of said protective sheath tube.
6. An apparatus for supplying raw material according to claim 1, wherein said sheath tube comprises a protective sheath tube for directly covering said metallic support member and a sliding sheath tube that is inserted so as to enable the sliding movement of said protective sheath tube.
7. An apparatus for supplying raw material according to claim 1, wherein said engaging-component comprises a metallic flange to be disposed onto said raw material supply tube, and wherein the position where to be disposed can be adjusted according to the pulling apparatus to be employed.
8. A method for supplying raw material to be employed in growing a single crystal by the CZ method, which is applied for an additional charging or recharging the solid raw material in granular form into the molten raw material in the crucible, the method comprising the steps of:
filling said solid raw material into a raw material supply tube having a conical bottom lid in place set to close the lower end aperture thereof;
lifting and descending said raw material supply tube subsequently above the crucible, which is disposed in the centerline of the pulling furnace;
making the descending movement of said raw material supply tube to come to a halt at the predetermined height;
lowering down further a metallic support member, which is covered with a sheath tube and runs through the inside space of said raw material supply tube until being connected with said bottom lid; and
releasing said bottom lid to open up the lower end aperture, thus enabling said solid raw material to be charged into said molten raw material in said crucible.
9. A method for supplying raw material according to claim 8, wherein one or a plurality, namely two or more, of metallic support members are disposed within the inside space of the raw material supply tube, and wherein, in case that a single metallic support member is disposed, it is connected with said bottom lid at its center position, while in case that a plurality of metallic support members are disposed, those are preferably to be connected with said bottom lid at the circumferential positions apportioned equally.
10. A method for supplying raw material according to claim 8, wherein an ascendingdescending movement of said metallic support member is configured to synchronize with an ascendingdescending movement of said raw material supply tube.
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 nestable pallet comprising:
an upper panel including a plurality of openings;
a lower panel below the upper panel, the lower panel having a peripheral lip protruding upward from the lower panel, the peripheral lip generally extending along an outer periphery of the pallet and along an outer edge of the lower panel in a first direction, the peripheral lip providing the outermost edge of the lower panel;
first and second feet disposed near the outer periphery, and wherein the first and second feet are generally tapered downward from the lower panel, wherein the first and second feet are aligned with two of the plurality of openings through the upper panel; and
at least one rib extending upward from the lower panel to the upper panel, wherein the at least one rib extends from the first foot to the second foot in a second direction generally parallel to the first direction.
2. The nestable pallet of claim 1, wherein the peripheral lip extends around the entire pallet.
3. The nestable pallet of claim 1, wherein the first and second feet each include an upper section and a lower section having a diameter less than the upper section.
4. The nestable pallet of claim 1, wherein the at least one rib includes two ribs.
5. The nestable pallet of claim 4, wherein the at least one rib is four ribs.
6. The nestable pallet of claim 1, wherein the lip extends upward from the lower panel the same distance as the at least one rib.
7. The nestable pallet of claim 1, further including a plurality of cylindrical ribs extending between the upper panel and the lower panel.
8. The nestable pallet of claim 1, wherein the at least one rib has a single wall thickness, and wherein the at least one rib extends upward from a continuous, planar surface of the lower panel.
9. The nestable pallet of claim 8, wherein the pallet is formed by injection molding.
10. The nestable pallet of claim 1 wherein the lower panel and the first and second feet are part of a lower deck section and wherein the at first and second feet are integrally molded with the lower deck section.
11. A method for manufacturing a nestable pallet including the steps of:
injection molding an upper deck section having an upper panel with a plurality of upper openings therethrough and having a plurality of upper rib sections extending downward from the upper panel;
injection molding a lower deck section having a lower panel and having a plurality of lower rib sections extending upward from the lower panel, the lower deck section further including a plurality of feet extending downward from the lower panel;
aligning the plurality of upper rib sections with the plurality of lower rib sections, each of the plurality of upper rib sections and each of the plurality of lower rib sections elongated along a length substantially greater than its respective height;
aligning the plurality of feet with the openings in the upper panel; and
securing the upper rib sections to the lower rib sections to form a box beam section with the upper panel, lower panel, upper rib sections and lower rib sections.
12. The method of claim 11 wherein the openings in the upper panel are sized to at least partially receive the feet from an identical nestable pallet nested thereon.
13. The method of claim 11 wherein the plurality of lower rib sections extend upwardly from an upper surface of the lower panel, the lower panel lying in a plane below the plurality of lower rib sections.
14. The method of claim 13 wherein a portion of the lower panel is provided directly below each of the plurality of lower rib sections.
15. The method of claim 11 wherein the plurality of upper rib sections extend downwardly from a lower surface of the upper panel, the upper panel lying in a plane above the plurality of upper rib sections.
16. The method of claim 15 wherein a portion of the upper panel is provided directly above each of the plurality of upper rib sections.
17. A nestable pallet comprising:
a lower panel having a peripheral lip;
first and second feet tapered downwardly from the lower panel;
a first plurality of lower ribs extending upward from the lower panel, the first plurality of ribs having a first shape;
a second plurality of lower ribs extending upward from the lower panel, the second plurality of lower ribs having a second shape different from the first shape, wherein each of the first plurality of lower ribs extends from an outer surface of one of the second plurality of lower ribs to an outer surface of another one of the second plurality of lower ribs; and
an upper panel including openings aligned with the first and second feet, wherein the openings and the first and second feet define cavities configured to receive feet from a similar pallet.
18. The nestable pallet of claim 17 wherein the second shape is, in cross section, generally circular.
19. The nestable pallet of claim 17 wherein each of the second plurality of lower ribs are shaped to include, in cross section, the same diameter.
20. The nestable pallet of claim 17 wherein the outer surfaces of the second plurality of lower ribs are shaped to provide, in cross section, a perimeter.
21. The nestable pallet of claim 20 wherein the perimeter is provided with a single-wall thickness.
22. The nestable pallet of claim 20 wherein the perimeter is generally circular.
23. A nestable pallet comprising:
a lower panel having a peripheral lip, the peripheral lip generally extending along an outer edge of the pallet in a first direction;
first and second feet disposed near the outer edge, the first and second feet tapered downwardly from the lower panel;
a first plurality of lower ribs extending upward from the lower panel, the first plurality of lower ribs extending from the first foot to the second foot in a second direction generally parallel to the first direction;
a second plurality of lower ribs extending upward from the lower panel, the second plurality of lower ribs positioned further from the outer edge than the first plurality of lower ribs, the second plurality of lower ribs including a plurality of ribs having a first shape and a plurality of ribs having a second shape extending between the ribs having the first shape, wherein the ribs having the second shape extend in directions that are non-parallel with the first and second directions, and wherein each of the ribs having the second shape extend from an outer face of one of the ribs having the first shape to an outer face of another one of the ribs having the first shape without extending inside any of the ribs having the first shape; and
an upper panel including openings aligned with the first and second feet, wherein the openings and the first and second feet define cavities configured to receive feet from a similar pallet.
24. The pallet of claim 23, wherein the outer faces of the ribs having the first shape face one another.
25. The pallet of claim 23 wherein the ribs having the first shape are centered around different axes.
26. The nestable pallet of claim 23 wherein the second shape is, in cross section, generally circular.
27. The nestable pallet of claim 23 wherein the second plurality of lower ribs are shaped to provide, in cross section, a perimeter.
28. The nestable pallet of claim 27 wherein the perimeter has a single-wall thickness.
29. The nestable pallet of claim 28 wherein the perimeter is generally circular.