Patent · US Expired

Method and apparatus for aligning photoprinting plates in a production line

US5814826A · kind A · utility

1Cited by

10References

7Claims

0Family size

Assignee

Demminer Maschinen Technik GmbH · DE

Inventors

Roland Thoms · Schallstadt, DE
Gunter Kettner · Neubrandenburg, DE
Dietmar Schuldt · Neubrandenburg, DE
Lutz Hamann · Neubrandenburg, DE

Key dates

Filing date	Aug 26, 1996
Grant date	Sep 29, 1998
Priority date	—
Expiry date	Aug 26, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG03F9/00
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A method and apparatus for precisely aligning two photo printing plates with each other by placing a light emitting laser diode on one side of one of the photoprinting plates and a photo diode that provides coordinate information on the other photoprinting plate so that when the laser beam from the laser emitting diode is directed through the photoprinting plates to the photo diode, the coordinate information on excited point on the photo diode can be compared to a reference signal to generate a control signal to activate motors that position the photoprinting plates in the proper position with respect to each other.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.