Abstract: A contact printer comprising a glass plate on which a rubber mat can be placed by unwinding the latter from a roll. The cylinder of the roll is mounted in a slide which can be moved along guide rails extending on both sides of the glass plate. The guide rails are mounted near a rear edge portion of the housing so as to be pivotable about a pivot axle.

Abstract: A printing frame for the preparation of copies from a master. The printing frame has a mat which is secured to a base plate such that the mat is free to shift in all directions. Photographic material and the master are placed on the mat, and a transparent plate is placed over the material and the master. Vacuum is applied to the frame to adhere the mat, the material and the master to the transparent plate. Because the mat can move freely, hollow spots or non-adhering spaces are eliminated.

Abstract: The invention relates to an exposure device for reprographic techniques to expose photosensitive materials through a master in which the copy partners are pressed by a rubber mat against a glass plate and the exposure is effected through the glass plate.To improve the complete contact of the copy partners with each other and with the glass plate, a smoothing device (6) is provided on the rear surface of the rubber mat, consisting of pressure elements, in particular rollers (12), drawn on chains (7) over the rear surface of the rubber mat. The pressure elements squeeze out potential air pockets between the rubber mat and the glass plate and insure that the copy partners fit tightly against each other without separation over their entire surface.