Printing machine registration target
US4273045A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1979 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Jul 23, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F33/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A registration target for printing on a web or sheet includes a pair of juxtaposed orthogonal arms, at least one of which extends lengthwise along the web. One or more tabs projects perpendicularly from each arm but only at one edge thereof. The widths of the arms and tabs substantially correspond to the stroke width of the lines and characters being printed on the web and the length of each tab is a multiple of that stroke width. By observing the orientations of the tabs and the amounts by which they project beyond one another of the targets printed by a series of print cylinders in a press, one can immediately discern the directions and amounts in terms of stroke width of any registration errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.