Abstract: A reprographic apparatus has a copyboard for holding a document to be exposed in a flat position in an exposure plane. The copyboard includes a support plate defining the exposure plane with transparent plate arranged above the plate and being pivotally connected therewith along one side edge. A releasable hold-down mechanism locks the glass plate in an operative position in which it holds the document in pressurized contact with the support plate. A movable pressure bar extends in parallel to the pivotally connected side edge of a glass plate, the bar being connected at its ends with side plates, which are displaceably and pivotally connected to a housing of the copyboard.Such an apparatus is known for instance from the EP 0 085 862.

Abstract: An original holder or like device for bringing a sheet into a flat exposure plane in a reprographic apparatus comprises a transparent resilient support plate which normally is resiliently held slightly bowed and a rigid flat pressure plate such as a glass plate which can be pressed onto the convex side of the support plate to bring the support plate and a sheet resting on it into a flat position for exposure of the sheet.

Abstract: A reprographic camera for exposing an original to illumination that is passed through an optical system to light-sensitive material is provided with a holder having at least two mounting surfaces onto each of which an original can be fitted, and which is rotatable about an axis perpendicular to the optical axis of the optical system so that the holder can be set in a plurality of positions in each of which one of the mounting surfaces faces the optical system. One of the mounting surfaces is located at a greater distance than another from the axis of rotation of the holder so that the respective active positions of these surfaces are at different distances from the objective of the optical system, thus providing different reproduction ratios.

Abstract: An optical apparatus for setting any one of a plurality of lenses in a certain operating position and for setting the opening of at least one of the lenses comprises a lens turret rotatable around an axis and having the lenses mounted thereon at locations spaced apart about the same axis, a gear on at least one of the lenses and turnable relative to the turret for adjusting the lens opening, and a drive system including a shaft coaxial with and rotatable in either direction about the axis and carrying a drive gear engaging each adjusting gear for turning the lens turret and each adjusting gear. At least one of the adjusting gears has a limited range of rotation relative to the lens turret in at least one direction so that the turret is rotatable by the drive gear through an adjusting gear when the latter is at a limit of its range of relative rotation. Preferably each lens is provided with an adjusting gear and only one drive gear is employed, which at any moment drivably engages all the adjusting gears.