Heated roller and apparatus for sensing roller temperature

Claim 2

In a heated roller and apparatus for sensing the temperature of the roller, having a heating device arranged inside the roller and a stationary temperature sensor, the improvement comprising; means mounting the temperature sensor a short radial distance from a portion of the outer surface of the roller, a stationary coveR ring mounted to cover the sensor and said portion of the outer surface of the roller, and an annular projecting edge formed as a portion of the roller to form an annular space whose walls include said portion of the outer surface of the roller, said cover, and said projecting edge.

Claim 3

A roller and sensing apparatus as defined in claim 1, wherein said cover ring is formed of low heat-conducting material.

Claim 4

A roller and sensing apparatus as defined in claim 1, wherein said cover ring surrounds an end of the roller by means of an annular cuplike structure which extends along the roller to include said annular projecting edge.

Claim 5

A roller and sensing apparatus as defined in claim 3, wherein said cover ring includes a heat-reflecting layer on its inner surface.

Claim 6

A roller and sensing apparatus as defined in claim 4, wherein said heat-reflecting layer is a mirrorlike layer.

Claim 7

A roller and sensing apparatus as defined in claim 4, wherein said outer portion of the surface of the roller that faces the temperature sensor is covered by a heat-absorbing layer.

Claim 8

A roller and sensing apparatus as defined in claim 5, wherein said heat-absorbing layer consists of blackening said outer portion of the surface of the roller.

Claim 9

A roller and sensing apparatus as defined in claim 1, wherein said cover ring and said projecting edge of the roller are so shaped to prevent material handled by the roller from entering said annular space.

Claim 10

In combination, a cup-shaped roller adapted to be heated to provide a means for heating a fiber or the like which passes over said roller as said roller rotates, an annular projecting edge formed about the circumference of said roller, dividing said roller into a first surface which is adapted to engage the fiber or the like, and a second surface, a stationary temperature sensor radially spaced externally to and in close proximity to said second surface, and a stationary annular cover ring enclosing said second surface and said temperature sensor and extending an axial distance of said roller to cooperate with said projecting edge to form an enclosed space whose temperature is indicative of the temperature of the first surface of said roller.

Claim 11

In combination, a cup-shaped roller adapted to be heated to provide a means for heating a fiber or the like which passes over said roller as said roller rotates, an annular projecting edge formed about the circumference of said roller, dividing said roller into a first surface which is adapted to engage the fiber or the like, and a second surface, a stationary temperature sensor radially spaced externally to and in close proximity to said second surface, and a stationary annular cover ring enclosing said second surface and said temperature sensor and extending an axial distance of said roller to cooperate with said projecting edge to form an enclosed space whose temperature is indicative of the temperature of the first surface of said roller.

Claim 12

The combination defined in claim 9, wherein the surfaces of said enclosed space which are stationary are provided with a heat-reflecting surface and the surfaces which rotate are provided with a heat-absorbing surface.