Process and plant for continuous manufacture of a foam layer

Details Process and plant for continuous manufacture of a foam layer Process and plant for continuous manufacture of a foam layer

2006-02-14

2006-02-14

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

C264S045800, C264S046200, C264S293000

Reexamination Certificate

active

06998077

ABSTRACT:
Plant for manufacturing a latex foam layer of unlimited length and having lower and upper recesses. A plurality of laying planes provided with lower protuberances proceeds between an injection station and a layer removing station. Foam provided with lower recesses is directed towards a vulcanizer staying between the injecting station and the removing station. A plurality of upper plates, each of them provided with protuberances, is lowered, one by one, on the foam layer to impress upper recesses before the foam layer enters the vulcanizer. The plates, placed on the foam layer, have their ends shaped in such a way to avoid completely any penetration of steam condensation drops. Upper plates release their weight to fixed supports of the planes to which they are bound until they leave the vulcanizer. The coming back of the plates from the extraction station towards the new cycle of moulding is independent of the operating system of the planes.

REFERENCES:
patent: 5229138 (1993-07-01), Carotti
patent: 6086802 (2000-07-01), Levera et al.
patent: 6312244 (2001-11-01), Levera et al.
patent: 0380963 (1990-08-01), None
patent: 2030066 (1980-04-01), None
EPO Office Action dated Feb. 25, 2005 issued for European Application No. 02 025 766.3.
EPO Office Action dated Jun. 29, 2004 issued for European Application No. 02 025 766.3.

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