Detecting misalignment
US10272700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2015 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Oct 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00877
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Examples of a method for detecting misalignment cause a printer to print a calibration pattern on a recording medium sheet. The calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet (or to spaced positions along a line where folding of the recording medium sheet by a folding apparatus is intended to take place). When the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of the plural measurement scales are printed at the reference locations on the recording medium sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.