Rotatable roller

#1. Field of the Invention

#The invention relates to a rotatable roller with a roller body, having correlated therewith channels for guiding a medium therethrough for the purpose of temperature control of the roller body, the medium being, in particular, a liquid.

#2. Description of the Related Art

#In the drawing:

#FIG. 1 shows a deflecting member which as a whole is of a screw shape;

#FIG. 2 is a deflecting member similar to that of FIG. 1 in which a rigid central longitudinal axle is provided on whose exterior a screw is attached;

#The roller according to the invention (shown in FIG. 8) has one or more flow channels 1, 101, 201, 301, 501, 601 which are arranged axially in the roller and are distributed about the circumference of the roller and in which a medium, in particular, a liquid, is guided for temperature control (tempering) of the roller. Such channels can be produced, for example, by drilling and can then have a straight extension. Generally, several such channels are arranged in a roller. Such a roller body is provided on both ends with flange pins by which a connection of the channels to an outer supply with heating or cooling media is ensured. A central axial hollow space in the hollow roller (FIG. 8) can be used as a flow channel 401 for tempering media wherein this channel 401, for example, is a supply line and a peripheral channel 1, 101, 201, 301, 501, 601 can serve as a return line or vice versa. The central flow channel 401 can be provided with a deflection member 405 for an improved adjustment of the flow conditions, wherein the deflection member 405 with regard to its size is matched to the axial and radial extension of the hollow space or chamber.

#FIG. 3 shows a straight channel 1 which has at one roller end an inlet E and at the other roller end an outlet A for the flowing medium.

#In a further embodiment (FIG. 5) a channel 101 is illustrated whose inlet E and outlet A are positioned on the same side of the roller surrounding the channel. Opposite the inlet and outlet an axial end portion 102 is provided in which a 180° bend of the channel 101 is formed so that the return path 103 to the outlet side is provided.