Printed paper drying device for offset printing

Claim 1

A printed paper drying apparatus for off-set printing, comprising in combination: a pair of upper and lower drying boxlike structures defining space therein having upper and lower direct-fire drying means respectively, for drying upper and lower surfaces respectively of a strip web conveyable therebetween; a hot air drying space means for providing hot air against the strip web, located serially after said upper and lower directfire drying means; roller-assembly and air-cooling means defining an air cooling space in juxtaposition to and next in flow series after the hot air drying space means; a vented air collector collection means including a collection space and an exhaust fan mounted therein operatively connected in flow series communication with an upper portion of the air cooling space for variably adjustably controlling exhaust air from the air cooling space; an air heating chamber means for heating air within a chamber space thereof, and mounted in communication with the air heating chamber means chamber space there being an air heating chamber fan for force circulating hot air from the chamber space to a lower portion of said hot air drying space means; and air flow-recycle means includinG outlet vents to said hot air drying space means and conduit structure providing for recycling the flow thereof to the air heating chamber means; said upper and lower direct-fire drying means comprising opposing serially alternately spaced flame-ejecting burners positioned to alternately and serially expose opposite faces of a strip web to direct flame; said hot air drying space means providing a series of opposingly-directed and axially-aligned substantially coaxially to one-another upper and lower hot-air-ejection nozzles arranged for simultaneously directing hot air onto upper and lower strip web faces; and hinge means pivotably hinge-mounting the pair of drying box-like structures at corresponding edges thereof for the opening and closing of one relative to the other, and including jack means connected between opposite-side edges of the pair of drying box-like structures opposite from the hingemounted hinge means, for opening and closing one relative to the other of the pair of drying box-like structures.