Claims
- 1. A hot plate unit comprising:a case having a lip; a hot plate having a heat generator, wherein the hot plate is made of sintered ceramic; and a holder for securing the hot plate to the case, wherein the holder contacts a a peripheral portion of the upper surface of the hot plate when the holder is fixed to the case; wherein the holder includes a flat ring, wherein the ring has a diameter substantially equal to that of the lip; wherein the holder includes a plurality of projections extending inwardly from the ring; wherein the projections contact separate points on the periphery of the upper surface of the hot plate.
- 2. The hot plate unit according to claim 1, further comprising an annular attachment, wherein the hot plate is fixed to the lip via the annular attachment.
- 3. The hot plate unit according to claim 2, wherein a step is formed at an inner edge of the attachment for supporting the hot plate.
- 4. The hot plate unit according to claim 1, wherein the holder is plate-like and has at least one inwardly extending projection, wherein the holder has a hole for receiving a fastener.
- 5. The hot plate unit according to claim 2, wherein the holder includes an inwardly projecting potion that is bent toward a lower side of the holder.
- 6. The hot plate unit according to claim 1, wherein the flat ring is made of spring steel.
- 7. A hot plate unit comprising:a case having a lip; a hot plate having a heat generator, wherein the hot plate is made of sintered ceramic; and a holder for securing the hot plate to the case, wherein the holder contacts a peripheral portion of the upper surface of the hot plate when the holder is fixed to the case; wherein the holder includes a plurality of holding plates, each holding plate having a length that is a fraction of the length of the lip.
- 8. The hot plate unit according to claim 7, further comprising an annular attachment, wherein the hot plate is fixed to the lip via the annular attachment.
- 9. The hot plate unit according to claim 8, wherein a step is formed at an inner edge of the attachment for supporting the hot plate.
- 10. The hot plate unit according to claim 7, wherein the holder is plate-like and has at least one inwardly extending projection, wherein the holder has a hole for receiving a fastener.
- 11. The hot plate unit according to claim 7, wherein the holder includes an inwardly projecting portion that is bent toward a lower side of the holder.
- 12. The hot plate unit according to claim 7, wherein the flat ring is made of spring steel.
Priority Claims (5)
Number |
Date |
Country |
Kind |
11-016163 |
Jan 1999 |
JP |
|
11-032891 |
Feb 1999 |
JP |
|
11-225335 |
Aug 1999 |
JP |
|
11-228457 |
Aug 1999 |
JP |
|
11-234171 |
Aug 1999 |
JP |
|
CROSS REFERENCES TO RELATED APPLICATIONS
This application is a continuation of (and incorporates by reference) patent application Ser. No. 09/471,759 filed Dec. 23, 1999 and entitled “HOT PLATE UNIT.”
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Continuations (1)
|
Number |
Date |
Country |
Parent |
09/471759 |
Dec 1999 |
US |
Child |
09/880742 |
|
US |