Web guiding apparatus

Claim 2

Web guiding apparatus including a web guide roll mountable transversely to and in arcuately extending contact with a web to be guided in a desired direction of web travel, means to bodily translate said guide roll in axial directions to one side or the other of an intermediate bodily position in response to and in opposition to lateral shifting of the web to be guided, means for shifting the surface of the guide roll in the axial direction as the guide roll turns to thereby provide a steering action of tHe guide roll on the web while maintaining the roll axis perpendicular to said desired direction of web travel, said last named means changing the intensity and direction of its steering action proportionately to the degree of displacement and direction of displacement of the guide roll from its intermediate bodily position.

Claim 3

Web guiding apparatus including a web guide roll mountable transversely to and in arcuately extending contact with a web to be guided, means to bodily translate said guide roll in axial directions to one side or the other of an intermediate bodily position in response to and in opposition to lateral shifting of the web to be guided, points on the surface of the guide roll being reciprocable, with each revolution of the roll, along the axial direction of the roll and relatively to the roll body through a complete back and forth cycle to one and then the other side of a central position of zero axial displacement, the amplitude of such reciprocation being zero when the roll is in its intermediate bodily position, the amplitude varying from zero directly with the displacement of the roll from its intermediate bodily position, the direction of initial movement of the points in each cycle of reciprocation changing according to whether the roll is on one or the other side of its intermediate bodily position.

Claim 4

Web guiding apparatus including a web guide roll mountable transversely to and in arcuately extending contact with a web to be guided, means to bodily translate said guide roll in axial directions to one side or the other of an intermediate bodily position in response to and in opposition to lateral shifting of the web to be guided, points on the surface of the guide roll being reciprocable, with each revolution of the roll, along the axial direction of the roll and relatively to the roll body through a complete back and forth cycle to one and then the other side of a central position of zero axial displacement, the amplitude of such reciprocation being zero when the roll is in its intermediate bodily position, the amplitude varying from zero directly with the displacement of the roll from its intermediate bodily position, the direction of initial movement of the points in each cycle of reciprocation changing according to whether the roll is on one or the other side of its intermediate bodily position.

Claim 5

Apparatus as in claim 2 in which the roll comprises a tubular beam portion of a depth of section almost as great as the outside diameter of the roll for strong support against bending load deflections, and a plurality of slats slidingly guided on the tubular beam portion.

Claim 6

Apparatus as in claim 3 including camming means for controlling the sliding movement of the slats as a function of the rotation of the roll to provide such reciprocation of points at the surface of the roll.

Claim 7

Apparatus as in claim 4 in which the direction and degree of tilt of the camming means is mechanically linked to the direction and degree of said translation of the guide roll to one side or the other of said intermediate bodily position.

Claim 8

Apparatus as in claim 3 in which the slats are surrounded and covered by an elastomeric sleeve.

Claim 9

Guide roll apparatus including a roll comprising a tubular beam, end bearing means at the ends of the beam, axially extending slideway in the outside surface of the beam, and slats in the slideways, said roll being mountable transversely to and in arcuately extending contact with a web to be guided in a desired direction of web travel, means to bodily translate said roll in axial directions to one side or the other of an intermediate bodily position in response to and in opposition to lateral shifting of the web to be guided, means comprised at least in part of said slats for shifting the surface of the roll in the axial direction as the roll turns to thereby provide a steering action of the guide roll on the web while maintaining the roll axis perpendicular to said desired direction of web travel, said last named means changing the intensity and direction of its steering action proportionately to the degree of the displacement and direction of displacement of the roll from its intermediate bodily position.

Claim 10

Guide roll apparatus including a roll comprising a tubular beam, end bearing means at the ends of the beam, axially extending slideway in the outside surface of the beam, and slats in the slideways, said roll being mountable transversely to and in arcuately extending contact with a web to be guided in a desired direction of web travel, means to bodily translate said roll in axial directions to one side or the other of an intermediate bodily position in response to and in opposition to lateral shifting of the web to be guided, means comprised at least in part of said slats for shifting the surface of the roll in the axial direction as the roll turns to thereby provide a steering action of the guide roll on the web while maintaining the roll axis perpendicular to said desired direction of web travel, said last named means changing the intensity and direction of its steering action proportionately to the degree of the displacement and direction of displacement of the roll from its intermediate bodily position.