Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1982-09-29
1984-12-04
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34114, 34116, 34123, F26B 1308
Patent
active
044855672
ABSTRACT:
A web dryer structure for thermal removal of moisture from a traveling web such as a web of paper coming from the press section of a papermaking machine including a row of upper dryer drums and a row of lower dryer drums with the drums positioned to carry the web in a sinuous path successively between upper and lower drums and the web wrapping the upper and lower surfaces of the drums respectively with upper and lower looped felts wrapping the web on the upper and lower surfaces of the drums with the felt guided by guide rolls which for the upper felt are beneath upper drums and for the lower felts are above lower drums with the guide rolls being hollow roll shells and having glands therein divided so that a first portion of the guide roll faces the onrunning web and a second portion faces the offrunning web with vacuum means and pressure means connected to the interior of the guide rolls so that one portion is subjected to a vacuum, and the other portion is subjected to a pressure, and the arrangement accommodates running the web in either direction.
REFERENCES:
patent: 3011544 (1961-12-01), Lippke
patent: 3250019 (1966-05-01), Beachler
patent: 3751822 (1973-08-01), Crist
patent: 3753298 (1973-08-01), Ely
patent: 4172007 (1979-10-01), Kankaanpaa
Beloit Corporation
Schwartz Larry I.
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