Apparatus for viewing originals
AssigneeHeidelberger Druckmaschinen AG
InventorBernd Lassen
Life of this patent
Estimating the term…
Abstract
An apparatus for viewing originals in a flatbed scanner includes a fixed copy holder and a movable scanning unit with a light source for illuminating the original to be scanned, an optoelectronic transducer, and a scanning lens for projecting a scanned line of the original onto the optoelectronic transducer. Fitted below the copy holder is a light source, and fastened on the scanning unit is a dispersion foil drawn under the copy holder by the scanning unit when the scanning unit is brought into a parking position and drawn away by the scanning unit when the scanning unit is moved over the copy holder during scanning. The dispersion foil is stretched tight by a suitable stretching apparatus when the scanning unit is in the parking position.
Claims24
An apparatus for viewing originals in a flatbed scanner, comprising:
- a fixed copy holder for holding the originals, said copy holder having an upper side for the originals and a lower side;
- a movable scanning unit having:
- a light source illuminating an original to be scanned;
- an optoelectronic transducer converting scanning light from the original and modulated by content of the original into an electric signal;
- and
- a scanning lens projecting a scanned line of the original onto said optoelectronic transducer;
- a light source disposed at said lower side;
- a dispersion foil connected to said scanning unit;
- said scanning unit drawing said dispersion foil at said lower side of said copy holder when said scanning unit is in a parking position;
- and
- said scanning unit moving said dispersion foil when said scanning unit traverses along said copy holder during scanning.
An apparatus for viewing originals in a flatbed scanner, comprising:
- a fixed copy holder for holding the originals, said copy holder having an upper side for the originals and a lower side;
- a movable scanning unit having:
- a light source illuminating an original to be scanned;
- an optoelectronic transducer converting scanning light from the original and modulated by content of the original into an electric signal;
- and
- a scanning lens projecting a scanned line of the original onto said optoelectronic transducer;
- a light source disposed at said lower side farther from said copy holder than said scanning unit;
- and
- a dispersion foil connected to said scanning unit;
- said scanning unit drawing said dispersion foil at said lower side of said copy holder when said scanning unit is in a parking position;
- and
- said scanning unit moving said dispersion foil when said scanning unit traverses along said copy holder during scanning.
Dependencies are inferred from the claim text.