Pull roll apparatus and method for controlling glass sheet tension
First Claim
1. A pull roll apparatus for drawing a glass sheet, said pull roll apparatus comprising:
- a first stub roll pair;
a second stub roll pair; and
a control device that controls said first stub roll pair and said second stub roll pair while a first edge portion of the glass sheet is drawn between two rolls associated with said first stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two rolls associated with said second stub roll pair.
2 Assignments
0 Petitions
Accused Products
Abstract
A pull roll apparatus and method are described herein that can control a cross-draw tension and a down-draw tension of a glass sheet while manufacturing the glass sheet. In one embodiment, the pull roll apparatus includes a first driven stub roll pair, a second driven stub roll pair and a control device (e.g., PLC) that controls the first and second driven stub roll pairs while a first edge portion of the glass sheet is drawn between two vertically downtilted rolls associated with the first driven stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two vertically downtilted rolls associated with the second driven stub roll pair. If desired, the pull roll apparatus may include a pulling roll assembly (located below the first and second driven stub rolls) or another set of driven stub roll pairs (located below the first and second driven stub roll pairs).
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Citations
25 Claims
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1. A pull roll apparatus for drawing a glass sheet, said pull roll apparatus comprising:
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a first stub roll pair; a second stub roll pair; and a control device that controls said first stub roll pair and said second stub roll pair while a first edge portion of the glass sheet is drawn between two rolls associated with said first stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two rolls associated with said second stub roll pair. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for manufacturing a glass sheet, said method comprising the steps of:
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melting batch materials and forming the glass sheet; delivering the glass sheet to a pull roll apparatus; and drawing the glass sheet using the pull roll apparatus which comprises; a first stub roll pair; a second stub roll pair; and a control device that controls said first stub roll pair and said second stub roll pair while a first edge portion of the glass sheet is drawn between two rolls associated with said first stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two rolls associated with said second stub roll pair. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A glass manufacturing system comprising:
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at least one vessel for melting batch materials and forming molten glass; an isopipe for receiving the molten glass and forming a glass sheet; and a pull roll apparatus for receiving the glass sheet and drawing the glass sheet, wherein said pull roll apparatus includes; a first stub roll pair; a second stub roll pair; and a control device that controls said first stub roll pair and said second stub roll pair while a first edge portion of the glass sheet is drawn between two rolls associated with said first stub roll pair and while an opposing second edge portion of the glass sheet is drawn between two rolls associated with said second stub roll pair. - View Dependent Claims (24, 25)
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Specification