Conveyor roll device for preliminarily bending sheet glass
AssigneeNippon Sheet Glass Co., Ltd.
InventorTetsuya Mizusugi
Life of this patent
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Abstract
A glass sheet that has been heated nearly to a softening point thereof is preliminarily bent by a conveyor roll device while being fed along a feed path to a bending press. The conveyor roll device has a succession of first straight rolls spaced along the feed path for supporting a central region of the glass sheet, and a succession of second straight rolls spaced along the feed path for supporting a marginal edge portion of the glass sheet. The second straight rolls are vertically tilted through progressively differing angles, respectively, along the feed path with respect to the first straight rolls. The first and second straight rolls alternate with each other along the feed path.
Claims19
An apparatus for preliminarily bending a glass sheet heated nearly to a softening point thereof by a heating furnace while the glass sheet is fed relative to a central axis in a feed path direction from the heating furnace to a bending press, said glass sheet having a central portion and a marginal edge portion, the apparatus comprising:
- a plurality of spaced-apart first straight rolls for supporting the central region of the glass sheet;
- and
- a plurality of spaced-apart second straight rolls for supporting the marginal edge portion of the glass sheet, said second straight rolls having first ends closer to the central axis and second ends farther from the central axis;
- means for moving the second straight rolls including the first and second ends toward and away from the central axis;
- and
- means for vertically tilting the second straight rolls through progressively differing angles, respectively, along the feed path direction with respect to the first straight rolls.
A conveyor roll device for moving a glass sheet heated nearly to a softening point thereof relative to a central axis in a feed path direction, said glass sheet having a central portion and a marginal edge portion, said device comprising:
- left and right roll assemblies disposed on first and second sides of the central axis, respectively, said left and right roll assemblies for supporting the glass sheet on a succession of first straight roll surfaces engaging the central region of the glass sheet and a succession of second straight roll surfaces engaging the marginal edge portion of the glass sheet on the first and second sides of the central axis, respectively;
- said left roll assembly including first means for tilting said second straight roll surfaces through progressively differing angles, respectively, along the feed path, on the first side of the central axis in a first direction with respect to said first straight roll surfaces, said right roll assembly including second means for tilting said second straight roll surfaces through progressively differing angles, respectively, along the feed path, on the second side of the central axis in a second direction with respect to said first straight roll surfaces.
Dependencies are inferred from the claim text.