Conformable nosing device for reducing motion and stress within a glass sheet while manufacturing the glass sheet

• US 20080276646A1
• Filed: 05/09/2007
• Published: 11/13/2008
• Est. Priority Date: 05/09/2007
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Zhou, Naiyue, Chalk, Paul Gregory, Sun, Yawei, Herve, Patrick Jean Pierre
• Granted Patent: US 7,895,861 B2
• Time in Patent Office: Days
• US Class Current: 65/17.2
• CPC Class Codes: B65G 2249/04 Arrangements of vacuum systems or suction cups
• CPC Class Codes: C03B 33/0215 the ribbon being in a substantially vertical plane

Abstract

A conformable nosing device is described herein which conforms to have a bowed shape that substantially matches a bowed shape of a glass sheet and which engages the glass sheet to help minimize the motion of the glass sheet and to help reduce the stress within the glass sheet while the glass sheet is being scored and separated into individual glass sheets. In addition, the conformable nosing device can include a passive nosing device which can be controlled to further help minimize the motion of the glass sheet while the glass sheet is being scored and separated into individual glass sheets.

Claims

1. A conformable nosing device, comprising:

a flexible beam;

a nosing material attached to a first side of said flexible beam;

a support bracket; and

a plurality of extendable elements, wherein each extendable element has a first end attached to a predetermined location on said support bracket and a second end attached to a predetermined location on a second side of said flexible beam, and wherein each extendable element is either extended to push on said flexible beam, retracted to pull on said flexible beam or left in a neutral position that neither pushes on or pulls on said flexible beam such that said flexible beam is conformed to have a bowed shape that substantially matches a bowed shape of a piece of material which contacts an exposed side of said nosing material.

2. The conformable nosing device of claim 1, wherein each extendable element is:

a bolt;

a linear stage;

or

a motor driven precision position device.

3. The conformable nosing device of claim 1, wherein each extendable element includes a scale to indicate how much each extendable element has been extended to push on said flexible beam or retracted to pull on said flexible beam.

4. The conformable nosing device of claim 1, wherein each extendable element has a pinned joint or a sliding joint located at said second end of each extendable element which is attached to said flexible beam.

5. The conformable nosing device of claim 1, wherein each of the extendable elements is manually adjusted such that the bowed shape of the flexible beam substantially matches the bowed shape of the piece of material.

6. The conformable nosing device of claim 1, wherein each of the extendable elements is automatically adjusted such that the bowed shape of the flexible beam substantially matches the bowed shape of the piece of material.

7. The conformable nosing device of claim 1, wherein said flexible beam is conformed to have any one of the following bowed shapes:

a positive bell shape;

a negative bell shape;

a S-shape;

a M-shape;

or

a W-shape.

8. The conformable nosing device of claim 1, further comprising a passive nosing device which includes a plurality of pneumatic cylinders each having a soft material on a tip thereof which contacts the piece of material on a side opposite to the side contacting the nosing material on said flexible beam.

9. The conformable nosing device of claim 1, further comprising a passive nosing device which includes a plurality of vacuum ports that pull the piece of material closer to the nosing material on said flexible beam.

10. The conformable nosing device of claim 1, further comprising:

a first passive nosing device which includes a plurality of pneumatic cylinders each having a soft material on a tip thereof which contacts the piece of material on a side opposite to the side contacting the nosing material on said flexible beam; and

a second passive nosing device which includes a plurality of pneumatic cylinders each having a soft material on a tip thereof which contacts the piece of material on the side which is also contacting the nosing material on said flexible beam.

11. A method for producing a glass sheet, said method comprising the steps of:

melting batch materials to form molten glass and processing the molten glass to form the glass sheet;

drawing the glass sheet using a fusion draw machine;

moving a conformable nosing device to engage a side of the glass sheet, where said conformable nosing device has a bowed shape that substantially matches a bowed shape of the glass sheet; and

scoring the glass sheet using a scoring device which has a score head that scores the glass sheet on an exposed side opposite to the side contacting the conformable nosing device.

12. The method of claim 11, wherein said conformable nosing device includes:

a flexible beam;

a nosing material attached to a first side of said flexible beam;

a support bracket; and

a plurality of extendable elements, wherein each extendable element has a first end attached to a predetermined location on said support bracket and a second end attached to a predetermined location on a second side of said flexible beam, and wherein each extendable element is either extended to push on said flexible beam, retracted to pull on said flexible beam or left in a neutral position that neither pushes on or pulls on said flexible beam such that said flexible beam is conformed to have the bowed shape that substantially matches the bowed shape of the glass sheet which is contacting an exposed side of said nosing material.

13. The method of claim 11, wherein said conformable nosing device further includes a passive nosing device having a plurality of pneumatic cylinders each with a soft material on a tip thereof which contacts the exposed side of the glass sheet that is opposite to the side contacting the conformable nosing device.

14. The method of claim 11, wherein said conformable nosing device further includes a passive nosing device having a plurality of vacuum ports which pull the glass sheet closer to said conformable nosing device.

15. The method of claim 11, wherein said conformable nosing device further includes:

a first passive nosing device having a plurality of pneumatic cylinders each with a soft material on a tip thereof which contacts the exposed side of the glass sheet that is opposite to the side contacting the conformable nosing device; and

a second passive nosing device having a plurality of pneumatic cylinders each with a soft material on a tip thereof which contacts the side of glass sheet that is contacting the conformable nosing device.

16. The method of claim 11, wherein said conformable nosing device further includes a passive nosing device which can be controlled to help minimize motion of the glass sheet while the glass sheet is being scored and separated into individual glass sheets.

17. A glass manufacturing system comprising:

at least one vessel for melting batch materials and forming molten glass;

a forming vessel for receiving the molten glass and forming a glass sheet;

a fusion draw machine for drawing the glass sheet;

a traveling anvil machine including;

a conformable nosing device which has a bowed shape that substantially matches a bowed shape of the glass sheet; and

a scoring device which has a score head that scores the glass sheet on an exposed side that is opposite to a side contacting said conformable nosing device.

18. The glass manufacturing system of claim 17, wherein said conformable nosing device includes:

a flexible beam;

a nosing material attached to a first side of said flexible beam;

a support bracket; and

a plurality of extendable elements, wherein each extendable element has a first end attached to a predetermined location on said support bracket and a second end attached to a predetermined location on a second side of said flexible beam, and wherein each extendable element is either extended to push on said flexible beam, retracted to pull on said flexible beam or left in a neutral position that neither pushes on or pulls on said flexible beam such that said flexible beam is conformed to have the bowed shape that substantially matches the bowed shape of the glass sheet which is contacting an exposed side of said nosing material.

19. The glass manufacturing system of claim 17, wherein said conformable nosing device further includes a passive nosing device having a plurality of pneumatic cylinders each with a soft material on a tip thereof which contacts the exposed side of the glass sheet that is opposite to the side contacting the conformable nosing device.

20. The glass manufacturing system of claim 17, wherein said conformable nosing device further includes a passive nosing device having a plurality of vacuum ports which pull the glass sheet closer to said conformable nosing device.

21. The glass manufacturing system of claim 17, wherein said conformable nosing device further includes:

a first passive nosing device having a plurality of pneumatic cylinders each with a soft material on a tip thereof which contacts the exposed side of the glass sheet that is opposite to the side contacting the conformable nosing device; and

a second passive nosing device having a plurality of pneumatic cylinders each with a soft material on a tip thereof which contacts the side of glass sheet that is contacting the conformable nosing device.