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:
Jan. 14, 1992
Filed:
Aug. 24, 1990
Esko O Lehto, Kangasala, FI;
Jukka H Vehmas, Tampere, FI;
Tamglass Oy, Tampere, FI;
Abstract
The invention relates to a glass sheet bending or supporting mould which is made primarily by casting of a ceramic material and which includes a curving or flat shaping surface, a number of orifices (10, 11) in a shaping surface (7, 8) as well as channels (16, 17) extending through the mould material and in communication with orifices (10, 11). Said channels (16, 17) are formed as distribution channels common to a plurality of orifices (10, 11) and connected to each other by means of transverse connecting channels (161, 171) for building a ladder-like or lattice-like distribution manifold (16, 161; 17, 171). The invention relates also to a mould manufacturing method, wherein a ceramic-based material is cast in a manufacturing mould which, prior to a casting operation, is fitted with a temporary filling matching a desired distribution manifold and having a ladder-like or lattice-like configuration. Following a casting operation, the temporary filling is removed by using at least one of the following methods: baking for discharging the filling material as flue gases; dissolving with a solvent; heating for turning or releasing the material to a flowing or running state.