Oce-Technologies B.v.

Cornelius M F Janssen

Catharinus Van Acquoij

Ernest J J Clevers

Roy H R Jacobs

Daisuke Kawaguchi

Johannes H L Smeyers

Antonius G H Albers

Reinoldus F Winarto

The present invention provides a conveyor mechanism for conveying sheets. The conveyor mechanism comprises a movable conveyor body, a drive mechanism, and an adjustment system configured to detect and correct skewing of the conveyor body, comprising one or more markers provided on or in the conveyor body, a sensor arrangement for detecting each marker at two or more discrete positions, and a processor to determine the skewing of the conveyor body. The conveyor body and the drive mechanism of the conveyor mechanism are mounted on a movable conveyor frame, and the adjustment system includes a frame shifting device comprising one or one or more actuator for shifting or moving the conveyor frame relative to a fixed framework. The invention also provides a related method of correcting skewing in a conveyor mechanism for conveying sheets along a transport path.

Conveyor mechanism and a method for adjusting a conveyor mechanism

A method is provided for determining a sheet height of a sheet conveyed by a sheet transportation unit. An optical sensor is used for sensing the surface geometry of the sheet, resulting in a two-dimensional height image of the sheet. The height image has pixels that have a value representing a local height of the sheet. The method comprises the steps of: a) selecting from the height image pixels that have a deviating value; b) substituting the deviating value of a selected pixel by a realistic value that is derived from not selected pixels; and c) determining a sheet height by finding a maximum value from the values of the not selected pixels and the substituted values. Furthermore, a print system is provided that comprises a control unit that is configured to apply the invented method.

Method for determining a sheet height

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Venlo, Netherlands

Cornelius M F Janssen