Device for adjusting printing plates on the plate cylinder of printing presses
US4033259A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S101/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for facilitating peripheral adjustment of a printing plate on a printing cylinder of a multicolor printing press in the form of an optical viewing device having magnifying optics including a single eye piece and two objectives. The objectives are spaced for simultaneous viewing of a peripheral reference mark at the end of the cylinder and an index mark on the plate which is positionally related to the image thereon. The optical viewing device has a screen including an optical reference, with the reference and index marks being superimposable thereon in the same field of view. In one form of the invention a calibrated scale is provided on the screen for direct measurement of the disparity in peripheral register between the two marks. In another form of the invention the bracket which supports the viewing device has an associated calibrated micrometer screw for bodily movement of the viewing device between the two marks and with the change in micrometer reading providing a measure of the amount that the plate must be moved to achieve peripheral register.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.