Abstract: This is an alignment system where precise alignment of a reproducible image is obtained with respect to the paper. An imaged paper to be reproduced is placed on a light table having a right angle fitting or marking. The paper is placed on top of the light table and is aligned with this right angle marking. A transparent platen with marked scales is placed over the imaged paper and also aligned with the right angle fitting. The scales are placed over the corners of the image and image corner location readings are taken from the scales. These readings are then entered and fixed into a marking system such as an electrophotographic printer for reproduction of copies from the aligned and fixed original image.

Abstract: This is an alignment system where precise alignment of a reproducible image is obtained with respect to the paper. An imaged paper to be reproduced is placed on a light table having a right angle fitting or marking. The paper is placed on top of the light table and is aligned with this right angle marking. A transparent platen with marked scales is placed over the imaged paper and also aligned with the right angle fitting. The scales are placed over the corners of the image and image corner location readings are taken from the scales. These readings are then entered and fixed into a marking system such as an electrophotographic printer for reproduction of copies from the aligned and fixed original image.

Abstract: Sieving apparatus comprising a sieve carrier, means for imparting longitudinal vibratory movement to the sieve carrier said movement having substantially no vertical component, a sieving medium, a sieve frame to which said sieving medium is secured and supporting said sieving medium at an inclination of not more than 5.degree. to the horizontal, resilient means interposed between the sieve frame and the sieve carrier to support said sieve frame in said sieve carrier, an ultrasonic generator mounted on said sieve carrier and separate from said means for imparting vibratory motion, and coupling means coupling the output from said ultrasonic generator to said sieve frame, in a direction substantially parallel to the plane of the sieving medium.