Detecting stretch or shrink in print media
US8733884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2012 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Aug 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2029/3935
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing system includes a print media having two sets of test patterns formed or printed in at least two margins adjacent a content area on the print media. The two sets of test patterns are separated by a pattern distance and at least two test patterns in each set of test patterns have a different number of marks. Two integrated imaging systems are disposed opposite the print media and are mechanically tied together and separated by a fixed distance. The integrated imaging systems substantially simultaneously capture images of the two sets of test patterns. An image processing device can process the images to determine if one or more size variations have occurred in the print media in the in-track direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.