Method for protecting glass surfaces
AssigneeLibbey-Owens-Ford Co.
InventorsRichard J. McCurdy, Kenneth J. Heater, Alice B. Parsons, J. David Robbins
Life of this patent
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Abstract
A method and material is disclosed for protecting glass surfaces in a stack of glass sheets by applying an interleaving material comprised of polyethylene having a number average molecular weight of at least 150,000 to one or both major surfaces of the glass sheets. The glass sheets are then stacked in face-to-face relation for shipment or storage.
Claims20
A method for protecting stacked glass sheets, each of said glass sheets having two major surfaces, comprising the steps of:
- a) providing a particulate interleaving material comprised of polyethylene, said polyethylene consisting essentially of a polyethylene selected from the group consisting of high density polyethylene having a number average molecular weight of at least about 150,000 and ultra high molecular weight polyethylene having a number average molecular weight of at least about 1,000,000;
- b) applying said particulate interleaving material to one of the major surfaces of a first glass sheet;
- and
- c) bringing a major surface of a second glass sheet into face-to-face relation with said particulate interleaving material on the major surface of the first glass sheet.
A method for protecting stacked glass sheets, each of said glass sheets having two major surfaces, one of the major surfaces having a pyrolytic coating thereon, comprising the steps of:
- a) providing a particulate interleaving material comprised of polyethylene, said polyethylene consisting essentially of a polyethylene selected from the group consisting of high density polyethylene having a number average molecular weight of at least about 150,000 and ultra high molecular weight polyethylene having a number average molecular weight of at least about 1,000,000;
- b) applying said particulate interleaving material to one of the major surfaces of a first glass sheet;
- and
- c) bringing a major surface of a second glass sheet into face-to-face relation with said particulate interleaving material on the major surface of the first glass sheet.
A method for protecting stacked glass sheets, each of said glass sheets having first and second major surfaces, comprising the steps of:
- a) applying high density polyethylene having a number average molecular weight of at least about 150,000 to the first major surface of a first glass sheet;
- and
- b) bringing a major surface of a second glass sheet into face-to-face relation with said first major surface of the first glass sheet.
A method for protecting stacked glass sheets, each of said glass sheets having first and second major surfaces, comprising the steps of:
- a) applying ultra high molecular weight polyethylene having a number average molecular weight of at least about 1,000,000 to the first major surface of a first glass sheet;
- and
- b) bringing a major surface of a second glass sheet into face-to-face relation with said first major surface of the first glass sheet.
Dependencies are inferred from the claim text.