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AssigneeSaint-Gobain Glass France
InventorsArthur Palmantier, Emilien David, Jack Penners, Herbert Radermacher, Werner Kahlen, Achim Zeichner, Peter Schillings
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The invention relates to a device for bending sheets of glass, comprising an upper bending form and a bending support, the upper bending form and/or the bending support being laterally mobile relative to one another, the bending support comprising a pre-bending mold for the gravity bending of a sheet of glass and a press-bending mold configured for pressing the sheet of glass against the upper form, of these two molds of the bending support one being surrounded by the other when viewed from above, at least one of these two molds of the bending support being able to be given a relative vertical movement with respect to the other.
A device for bending sheets of glass, comprising an upper bending form and a bending support, said upper bending form and/or said bending support being laterally mobile relative to one another, said bending support comprising a gravity pre-bending mold constructed and arranged to carry out a controlled gravity bending of a sheet of glass and a press-bending mold configured for pressing the sheet of glass against said upper bending form, one of the gravity pre-bending and press-bending molds being surrounded by the other one of the gravity pre-bending and press-bending molds when viewed from above, at least one of the gravity pre-bending and press-bending molds being able to be given a relative vertical movement with respect to the other one of the gravity pre-bending and press-bending molds, wherein the gravity pre-bending mold has a contact path with the sheet of glass, the contact path having a predetermined shape that remains the same while supporting the sheet of glass, and wherein the gravity pre-bending mold is a frame of which the contact path for the sheet of glass has a width comprised in the range from 3 mm to 90 mm.
A method of preparing bent sheets of glass comprising bending the sheets of glass at their thermal bending temperature using a device for bending sheets of glass, comprising an upper bending form and a bending support, said upper bending form and/or said bending support being laterally mobile relative to one another, said bending support comprising a gravity pre-bending mold constructed and arranged to carry out a controlled gravity bending of a sheet of glass and a press-bending mold configured for pressing the sheet of glass against said upper bending form, one of the gravity pre-bending and press-bending molds being surrounded by the other one of the gravity pre-bending and press-bending molds when viewed from above, at least one of the gravity pre-bending and press-bending molds being able to be given a relative vertical movement with respect to the other one of the gravity pre-bending and press-bending molds, the method comprising bending a sheet of glass by gravity on the gravity pre-bending mold, then moving the press-bending mold into an upper position with respect to the gravity pre-bending mold in order to pick up the sheet of glass, then pressing the sheet of glass against the upper bending form, wherein the gravity pre-bending mold has a contact path with the sheet of glass, the contact path having a predetermined shape that remains the same while supporting the sheet of glass, and wherein the gravity pre-bending mold is a frame of which the contact path for the sheet of glass has a width comprised in the range from 3 mm to 90 mm.
Dependencies are inferred from the claim text.