Device for locally controllable preheating of a material web
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Oct 9, 2001
Grant Date -
N/A
app pub date -
May 10, 1999
filing date -
May 12, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a preheating device for locally controllable preheating of a material web (12) comprising at least one smooth web and/or at least one corrugated web and moving in feed direction (A), before any adhesive is applied to the material web (12) and before the web (12) is glued to at least one other material web to form a corrugated cardboard web. The device comprises a preheating element (14) adapted to be fed with heat transfer fluid and which is in contact with the material web (12) at a contact surface (17) extending across the entire width (b) of the material web (12). The preheating element (14) comprises a plurality of adjacent preheating sections (50, 50', 50', 50'') arrayed across the width of the material web (12) and each extending the length of the contact surface (17), each of which sections can be separately fed with heat transfer fluid, preferably steam.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| DE | A1 | DE19821222 | May 12, 1998 |
| EP | A2 | EP0957328 | May 06, 1999 |
International Classification(s)
- 1999 Application Filing Year
- B31F Class
- 86 Applications Filed
- 30 Patents Issued To-Date
- 34.89 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B31F Class
- 0 % this patent is cited more than
- 24 Age