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:
Aug. 13, 2024
Filed:
Oct. 26, 2022
Carl Zeiss Vision International Gmbh, Aalen, DE;
Optotech Optikmaschinen Gmbh, Wettenberg/Launsbach, DE;
Gerd Nowak, Neresheim, DE;
Wito Hartmann, Aalen, DE;
Roland Mandler, Wettenberg, DE;
Oswin Lack, Hüttenberg-Weidenhausen, DE;
Carl Zeiss Vision International GmbH, Aalen, DE;
Opto Tech Optikmaschinen GmbH, Wettenberg/Launsbach, DE;
Abstract
A blocking piece for vacuum blocking a lens blank is disclosed. The blocking piece includes a blank contacting element formed of a rigid fluid-permeable material having an upper surface for contacting the lens blank. The blocking piece further includes a support element having an upper part tightly enclosing the blank contacting element on a peripheral surface of the blank contacting element and a lower part adapted to engage with a clamping device for clamping the blocking piece. The lens blank is fixed to the upper surface of the blank contacting element by applying a vacuum within the blocking piece to provide suction through essentially the entire upper surface of the blank contacting element. The disclosure further relates to a method for blocking a lens blank and a use of an element formed of a rigid fluid-permeable material as a part of a blocking piece.