Water jet edge cutter with integral trim chute

摘要

A movable water jet edge trimmer has an integral trim chute attached to a cutting support plate for the trimmer. The support plate has a cutting aperture and a series of suction apertures located inboard of the outside edge of the travelling web for supporting the web against the support plate as a water jet passes out through the cutting aperture away from the support plate and through the web. The support plate has a curved surface located downstream and outboard of the cutting aperture which curves into a trim chute opening of a trim chute. Negative pressure is applied from the trim chute to the trim chute opening to draw any strip of material cut from the edge of the web over the curved surface and into the trim chute. The trim chute opening has a first edge that extends substantially parallel to the direction of the travel of the web and is substantially aligned and slightly inboard of the cutting aperture whereby the trim chute passes into the trim chute opening and a small portion of the edge of the web passes over the opening in the trim chute. In applications where the web comprises a paper of a lighter basis weight, an additional second support plate is utilized spaced from the first support plate on the opposite side of the web from the first support plate so as to sandwich the web between the two support plates.