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US 6,745,695 B2Granted
Printing machine with friction driven image cylinder
AssigneeNexPress Solutions LLC
InventorChristopher Liston
Life of this patent
Estimating the term…
Abstract
A printing machine having at least one printing unit whose image cylinder is driven by friction by an element to which the image is transferred. The influence of a change in the application of print is kept as small as possible, by the width of image cylinder and element being at least so much wider than the maximum width of the image to be transferred that the rotational speed of the image cylinder remains essentially constant in the event of a change in the image.
Claims6
A printing machine comprising:
- at least one printing unit, having an image cylinder driven by friction by an element to which an image produced on image cylinder is transferred, the width of said image cylinder and said element being at least so much wider than the maximum width of the image to be transferred that the rotational speed of the image cylinder remains essentially constant in the event of a change in width of the image wherein said image width and image cylinder width are related according to the formula:
- DriveForce=(TonedWidth×COF_Toned+UntonedWidth×COF_Untoned)×Engagement Force
- wherein:
- UntonedWidth=DrumWidth−TonedWidth.
1 more element
Dependencies are inferred from the claim text.