Paper making and fiber liberation – Apparatus – Web creping or crinkling type
Patent
1982-04-26
1984-07-31
Alvo, Steve
Paper making and fiber liberation
Apparatus
Web creping or crinkling type
162290, 34114, 34115, D21C 502, D21C 518
Patent
active
044628684
ABSTRACT:
A paper web drying apparatus having a throughdrying drum wherein heated air is supplied beneath a hood around a portion of the periphery of the drum through which the air may pass, the hollow interior of the drum being connected to exhaust means, the hood distributing heated air to the surface of the web, the improvement according to the invention comprises dividing the hood into at least two separate sections, the section adjacent the web inlet having a series of nozzles connected to a source of heated air and interspersed air ducts or the like connected to air exhaust means, the section adjacent the web outlet being connected to a source of heated air but not to exhaust means. This enables impingement drying to take place adjacent the web inlet, impingement and throughdrying to take place at a point further along the arc of travel of the web beneath the web and only throughdrying to take place during the final portion of the web travel.
REFERENCES:
patent: 3416237 (1968-12-01), Sutherland
patent: 3576078 (1971-04-01), Holt
patent: 3797126 (1974-03-01), Parkes
patent: 3891500 (1975-06-01), Kankaanpaa
Boorman Ben
Oubridge Terence J.
Alvo Steve
Kimberly-Clark Limited
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