Method to determine and/or compensate for effects of the deformation of a recording medium
AssigneeOcé Holding B.V.
InventorsTobias Breintner, Daniel Denzinger, Frank Keidel, Stefan Scherdel
Life of this patent
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Abstract
In a printer having first and second clamps, the deformation of a recording medium due to the web tensile force produced in the printer can be determined using the first and the second clamps. The deformation can be determined in advance of a printing process and/or during the printing operation. A print image can be adapted based on the determined deformation to compensate for the deformation of the recording medium.
Claims14
A method to determine a deformation of a recording medium in a printer including a first clamp before a print group of the printer and a second clamp after the print group, with respect to a transport direction, the method comprising:
- producing a web tensile force on the recording medium, between the first clamp and the second clamp, via driving of the recording medium by the first clamp and/or the second clamp, wherein the first clamp and the second clamp respectively include at least one roller;
- determining first velocities of the roller of the first clamp for a first web tensile force and for a second web tensile force;
- determining second velocities of the roller of the second clamp for the first web tensile force and for the second web tensile force;
- determining a correction factor based on the first web tensile force, the second web tensile force, the first velocities of the roller of the first clamp, and the second velocities of the roller of the second clamp;
- and
- determining stretching information with regard to a stretching of the recording medium between the first clamp and the second clamp based on a relationship of the second velocity to the first velocity given identical web tensile forces, and based on the correction factor.
A printer adapted to determine a deformation of a recording medium, comprising:
- a first clamp;
- a print group positioned after the first clamp in a transport direction;
- a second clamp positioned after the print group in the transport direction;
- and
- a controller that is configured to:
- control the first and/or second clamps to drive the recording medium to produce a web tensile force on the recording medium, wherein the first clamp and the second clamp respectively include at least one roller;
- determine first velocities of the roller of the first clamp for a first web tensile force and for a second web tensile force;
- determine second velocities of the roller of the second clamp for the first web tensile force and for the second web tensile force;
- determine a correction factor based on the first web tensile force, the second web tensile force, the first velocities of the roller of the first clamp, and the second velocities of the roller of the second clamp;
- and
- determine stretching information with regard to a stretching of the recording medium between the first clamp and the second clamp based on a relationship of the second velocity to the first velocity given identical web tensile forces, and based on the correction factor.
Dependencies are inferred from the claim text.