Importance

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Abstract

A web decurler for selectively removing the different degrees of curl from a running web. The decurler includes first, second and third relatively large diameter, rotatable rollers and a fourth roller assembly having at least one relatively small diameter, rotatable roller. All of the rollers are disposed adjacent to the web path so that the running web may wrap about a portion of their outer peripheral surfaces. The positions of the first and second rollers remain fixed with respect to the decurler, while the third roller is spaced a fixed predetermined distance and may be moved about the central longitudinal axis of one of the first and second rollers. The fourth roller assembly is spaced from and is movable about a preselected axis that is spaced from the other rollers. A first member supports the fourth roller assembly for movement about the preselected axis. A cam profile, carried by the first member, cooperates with a cam follower, associated with the third roller, so that the position of the third roller is determined by the position of the fourth roller assembly and so that the length of the web path in the decurler remains constant regardless of the relative positions of the rollers.

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First Claim