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:
Apr. 13, 1976
Filed:
Feb. 13, 1974
Jean Bouygues, Paris, FR;
Rene Gerard, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
A flat rectangular workpiece, such as a photographic plate in a photo-repeating apparatus designed to produce integrated-circuit masks, laterally overhangs a platform of a carriage which is slidable on a mobile supporting table. The platform has two end stops and a side stop defining the relative position of the workpiece thereon, the overhanging edges of the workpiece entering between upper and lower jaws of three grippers -- one on one side and two on the other -- when the carriage is slid into a working position. The lower gripper jaws, constituted by spring-loaded plungers normally held down by suction, are then released to lift the workpiece off the platform while clamping it against the overlying upper jaws. Manual retraction of a stop screw, bearing upon a fixed abutment on the supporting table, causes a limited further advance of the carriage under the force of a carriage-borne magnet coacting with the abutment; this movement results in withdrawal of the side stop, through a camming mechanism, even as the end stops disengage the clamped workpiece so that the latter thereafter has no contact with the carriage.