Alignment method for a plurality of coupled digital print engines
DC CAFCFirst Claim
1. A method to align an electrophotographic printing engines in a plurality of different print assemblies that are each capable of printing on a receiver to form one or more final prints to form an apparatus for digital printing including corrections for cross-track misregistration comprising:
- measuring each of the print assemblies to determine the location of a fixed component of the module relative to a receiver path in the x, y and z directions;
aligning two or more printing engines in an x and y direction by providing alignment features on the printing assemblies that align the assemblies in an x and y direction according to the measurements and that positioning the assemblies within a range of positions along the z direction;
aligning a first printing engine to a second printing engine in a cross track direction (z direction) based on a cross track (z direction) position of the receiver as measured by the second engine and the measuring of the printing modules.
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Abstract
The adjustment method aligns printing engines in a print assembly that is capable of printing on a receiver to form one or more final prints and includes corrections for cross-track misregistration. These adjustments are made in one embodiment by aligning two or more printing engines in an x and y direction relative to a receiver reference and then aligning each printing engines in a cross track direction (z direction) relative to the receiver reference based on measurements in the cross track direction (z direction).
19 Citations
20 Claims
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1. A method to align an electrophotographic printing engines in a plurality of different print assemblies that are each capable of printing on a receiver to form one or more final prints to form an apparatus for digital printing including corrections for cross-track misregistration comprising:
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measuring each of the print assemblies to determine the location of a fixed component of the module relative to a receiver path in the x, y and z directions; aligning two or more printing engines in an x and y direction by providing alignment features on the printing assemblies that align the assemblies in an x and y direction according to the measurements and that positioning the assemblies within a range of positions along the z direction; aligning a first printing engine to a second printing engine in a cross track direction (z direction) based on a cross track (z direction) position of the receiver as measured by the second engine and the measuring of the printing modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for digitally printing comprising:
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a plurality of electrophotographic printing engines each in one of two or more of different print assemblies that are capable of printing on a receiver to form one or more final prints wherein the print engines are alignable in an x, y and z direction relative to a receiver path cross track reference for sequentially printing on a receiver wherein the receiver path cross track reference is based on measurements in the cross track direction (z direction) relative to the receiver path cross track reference; a measurement device to measure a location of a receiver in the receiver path at a final one of the sequence of print assemblies; and an alignment device to align the two or more printing engines in the cross track direction (z direction) relative to the receiver path cross track reference based on the measurement. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification