Method of making sheet material heating and humidifying device

Claim 1

A method of making a steam chest having ducts for containing different flows of fluid circulated therethrough including the steps of boring three passages lengthwise of an elongated metallic cylinder at locations between the outer surface thereof and a wall defining a central opening therethrough, with the longitudinal axes of two of such passages being disposed in a common plane and spaced substantially equal distances from the longitudinal axis of the other of such passages, shaping the outer surface of the metallic cylinder at least between locations spaced inwardly from the opposite ends thereof to provide at least two like substantially flat surfaces, said flat surfaces extending along planes which intersect with each other adjacent to the other of said passages and intersect at like acute angles with said common plane, at a location between said two passages providing an aperture into the central opening, forming in each of the flat surfaces a row of slots which terminate inwardly of the ends of the body and open into the central opening, providing orifices between each of said passages and the central opening adjacent to one end thereof, and forming a chamber by disposing a pair of plugs within the central opening between the ends of said rows of slots and the adjacent ends of the body.

Claim 2

A method of making a steam chest having ducts for containing different flows of fluid circulated therethrough including the steps of boring three passages lengthwise of an elongated metallic cylinder at locations between the outer surface thereof and a wall defining a central opening therethrough, with the longitudinal axes of two of such passages being disposed in a common plane and spaced substantially equal distances from the longitudinal axis of the other of such passages, shaping the outer surface of the metallic cylinder at least between locations spaced inwardly from the opposite ends thereof to provide at least two like substantially flat surfaces, said flat surfaces extending along planes which intersect with each other adjacent to the other of said passages and intersect at like acute angles with said common plane, at a location between said two passages providing an aperture into the central opening, forming in each of the flat surfaces a row of slots which terminate inwardly of the ends of the body and open into the central opening, providing orifices between each of said passages and the central opening adjacent to one end thereof, and forming a chamber by disposing a pair of plugs within the central opening between the ends of said rows of slots and the adjacent ends of the body.