Duplex printer and method of printing to ensure desired registration of images on opposite faces of substrate web
AssigneeXeikon NV
InventorsErik Gabriel Geradus Van Weverberg, Kris Dons
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Abstract
A duplex printer has drive motors for driving transfer surfaces carrying toner particle images to transfer stations at which the images are transferred to opposed faces of a substrate web. A web drive motor drives the substrate web through the transfer stations. Sensors sense movement of the transfer surfaces and a control device controls the drive motors in response to signals received from the sensors. Thereby desired registration between the first and second images at a desired location on the substrate web is ensured.
Claims12
A multi-color duplex printer comprising:
- a first transfer surface drive device for driving a first transfer surface carrying a first multi-color toner particle image to a first transfer station at which said first multi-color toner particle image is transferred to one face of a substrate web;
- a second transfer surface drive device for driving a second transfer surface carrying a second multi-color toner particle image on said second transfer surface to a second transfer station at which said second multi-color toner particle image is transferred to the opposite face of said substrate web;
- a web drive device for driving said substrate web through said first and second transfer stations;
- a first transfer surface movement sensor for sensing movement of said first transfer surface;
- a second transfer surface movement sensor for sensing movement of said second transfer surface;
- and
- a control device for controlling said first, and second transfer surface drive devices and said web drive device in response to signals received from said first and second transfer surface movement sensors thereby to ensure desired registration between said first and second multiple toner images at a desired location on said substrate web.
A method of multi-color duplex printing comprising:
- driving a first transfer surface carrying a first multi-color toner particle image to a first transfer station at which said first multi-color toner particle image is transferred to one face of a substrate web;
- driving a second transfer surface carrying a second multi-color toner particle image on said second transfer surface to a second transfer station at which said second multi-color toner particle image is transferred to the opposite face of said substrate web;
- driving said substrate web through said first and second transfer stations;
- sensing movement of said first transfer surface;
- sensing movement of said second transfer surface;
- and
- controlling the movement of said first and second transfer surfaces and said substrate web in response to signals received from said first and second transfer surface movement sensors thereby to ensure desired registration between said first and second multiple toner images at a desired location on said substrate web.
Dependencies are inferred from the claim text.