The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2015
Filed:
Jun. 11, 2012
Michael Lee Rudolph, Newark, DE (US);
Joseph Anthony Perrotto, Landenberg, PA (US);
Dhiren V Patel, Hockessin, DE (US);
Robert a Mcmillen, Downingtown, PA (US);
Michael Lee Rudolph, Newark, DE (US);
Joseph Anthony Perrotto, Landenberg, PA (US);
Dhiren V Patel, Hockessin, DE (US);
Robert A McMillen, Downingtown, PA (US);
E I DU PONT DE NEMOURS AND COMPANY, Wilmington, DE (US);
Abstract
The invention provides an apparatus for preparing a relief printing form from a photosensitive element. More specifically, this invention describes an apparatus for preparing a relief form in an environment having controlled oxygen concentration during exposure to actinic radiation. The apparatus includes means for exposing a photosensitive element having an in-situ mask to actinic radiation through the in-situ mask in an environment having an inert gas and a concentration of oxygen between 190,000 and 100 ppm, and treating the exposed element to form the relief printing form having a pattern of raised surface areas.