Browse Prior Art Database

Posting to Photosensitive Materials

IP.com Disclosure Number: IPCOM000093456D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

King, GS: AUTHOR

Abstract

A composite photosensitive film which can be posted to is shown. A diazo-sensitive layer is coated with a MYLAR* protective cover which is opaque to ultraviolet light. When an image is to be posted to the diazo layer, a knife-seal platen having a knife edge surrounded by a heat shoulder is brought down on the diazo layer. The knife edge slices through the thermoplastic coated MYLAR protected layer. The surrounding heat shoulder seals the thermoplastic layer to the diazo layer to thus seal off the areas to be posted to from light and ammonia. Vacuum can be applied to remove the insert. The area can then be exposed and developed with ammonia without leakage of light or ammonia to adjacent unexposed and undeveloped areas. *Trademark of E. I. du Pont de Nemours and Co.

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Posting to Photosensitive Materials

A composite photosensitive film which can be posted to is shown. A diazo- sensitive layer is coated with a MYLAR* protective cover which is opaque to ultraviolet light. When an image is to be posted to the diazo layer, a knife-seal platen having a knife edge surrounded by a heat shoulder is brought down on the diazo layer. The knife edge slices through the thermoplastic coated MYLAR protected layer. The surrounding heat shoulder seals the thermoplastic layer to the diazo layer to thus seal off the areas to be posted to from light and ammonia. Vacuum can be applied to remove the insert. The area can then be exposed and developed with ammonia without leakage of light or ammonia to adjacent unexposed and undeveloped areas. *Trademark of E. I. du Pont de Nemours and Co.

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