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:
Jun. 28, 1988
Filed:
Jun. 22, 1987
Applicant:
Inventors:
Peter Burki, Wettingen, CH;
Fred Mast, Wil, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
355 46 ; 355 67 ;
Abstract
In the exposure beam path of a copy master which may have various formats, a four element variable objective is provided with stationary rear and front elements and variable intermediate elements. The rear element is arranged in a carousel-like automatic changer and may be replaced together with a master masks. A control device performs, by means of step motors and spindles, the automatic adjustment of the intermediate elements of the variable objective as a function of a particular master format set, in a manner such that the area of the copy master exposed to the copying light is automatically adapted to the master format.