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Precision Registration Technique

IP.com Disclosure Number: IPCOM000094141D
Original Publication Date: 1966-Jun-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Rottmann, HR: AUTHOR

Abstract

The technique is for precisely registering two photographic plates P1 and P2 during exposure of the plates. Such registration is also used during subsequent operations where the exposed or developed images on the plate are registered for exposing both sides of an emulsion placed between them. Plates P1 and P2 are mounted in frames F1 and F2. The purpose of F1 and F2 is to prevent chipping the edges of P1 and P2 and to provide straight, wear resistant reference edges. The frames and plates are rectangular and are arranged with their long axes perpendicular to each other.

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Precision Registration Technique

The technique is for precisely registering two photographic plates P1 and P2 during exposure of the plates. Such registration is also used during subsequent operations where the exposed or developed images on the plate are registered for exposing both sides of an emulsion placed between them. Plates P1 and P2 are mounted in frames F1 and F2. The purpose of F1 and F2 is to prevent chipping the edges of P1 and P2 and to provide straight, wear resistant reference edges. The frames and plates are rectangular and are arranged with their long axes perpendicular to each other.

P1 and P2 are registered during their initial exposure and during subsequent exposure of other plates by placing them in fixture 4 having six locating pins 5. Three pins 5 engage the edges of F1 and three engage the edges of F2 to provide three-point positioning of each frame. Fixture 4 can be used in both the camera during the initial exposure and in subsequent exposure apparatus. On the other hand there can be two separate fixtures, one for the camera and one for the exposure apparatus.

In the latter case, pins 5 of each fixture have to be located in identical positions so as to achieve the desired registration. Fixture 4 includes cover 6. Upon this are mounted a plurality of leaf springs 7. These engage F1 and F2 and hold them down with forces applied perpendicularly to them, so as to minimize any distortion of the plates.

In operation, P1 and P2 are placed in f...