Method for reliable loading of unexposed printing plates
US6130702A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1995 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Jul 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C1/1075
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a computer-to-plate system, printing plates are loaded from their shipping container onto a drum, where they are exposed by a laser. As the plates are packed with paper sheets between them, a paper removal system followed by a capacitance probe is used. The capacitance probe detects any paper remaining on the front or back of the plate. The plate is gravity loaded onto the drum and is resting on two contact points identical in position to the contact points of plate punching equipment. The orthogonal edge of the plate is detected electronically, in order to fully register the image to the plate. Magnetic clamps hold the plate to the imaging drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.