Frame length adjustment
AssigneeHewlett-Packard Development Company, L.P.
InventorsCarlos Millan-Lorman, Jason C. Hower, Cesar Fernandez, Timothy Wagner
Life of this patent
Estimating the term…
Abstract
In an example implementation, a method of adjusting frame length in an inkjet web press includes measuring a time T1 between a first sensor sensing a first mark and a second sensor sensing a second mark, and measuring a time T2 between the second sensor sensing the second mark and the first sensor sensing a next first mark. The method includes adjusting a gap between printed frames when T1 does not equal T2.
Claims14
A method of adjusting frame length in an inkjet web press comprising:
- measuring a time T1 between a first sensor sensing a first mark and a second sensor sensing a second mark;
- measuring a time T2 between the second sensor sensing the second mark and the first sensor sensing a next first mark;
- and
- adjusting a gap between printed frames when T1 does not equal T2.
A frame length adjusting inkjet web press comprising:
- a plurality of printheads to print first and second marks into print frames on a media web as the web passes through a print zone, the first marks separated from the second marks across the web by a cross-web distance;
- first and second sensors separated across the web by the cross-web distance, the first sensor aligned across the web with the first marks to sense the first marks as they pass by the first sensor, and the second sensor aligned across the web with the second marks to sense the second marks as they pass by the second sensor.
A non-transitory machine-readable storage medium storing instructions that when executed by a processor of a web press, cause the web press to:
- print images in frames on a media web;
- print first and second marks into the frames;
- sense a first mark with a first sensor and a second mark with a second sensor, where the sensors are separated from one another by a distance in a down-web direction;
- adjust a gap between the frames if, based on the sensing, the first and second marks are not separated by the same distance as the first and second sensors.
Dependencies are inferred from the claim text.