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US 6,029,477 AGranted
Systems and process for recycling glass fiber waste material into glass fiber product
AssigneePPG Industries Ohio, Inc.
InventorCurtis L. Hanvey, Jr.
Life of this patent
Estimating the term…
Abstract
The present invention provides a system for producing glass fiber product from scrap glass fibers comprising at least one crusher having at least one pair of rotatable rollers which rotate at essentially the same speed, the rollers having intermeshing protuberances for crushing scrap glass fibers passing therebetween; a dryer for drying the crushed glass fibers to form dried glass fibers having a mean average moisture content of less than about one weight percent; and a separating device for separating the crushed glass fibers into (1) a first portion of crushed glass fibers having a mean average length of less than about 5 millimeters and (2) oversize dried waste material.
Claims26
A system for producing glass fiber product from scrap glass fibers, the system comprising:
- (a) a waste material supply comprising waste material produced by a glass fiberizing process and comprising scrap glass fibers which have no more than about 1 weight percent of a coating composition;
- (b) a first crusher positioned to receive scrap glass fibers from the waste material supply, the first crusher comprising at least one pair of rotatable, intermeshing rollers and a drive device for rotating at least one of the rollers such that each pair of rollers rotate at essentially the same speed, each roller having an outer surface comprising a plurality of protuberances, at least a portion of one protuberance of a first roller of the pair of rollers contacting a corresponding portion of at least one protuberance of a second roller of the pair of rollers for crushing scrap glass fibers passing therebetween to form crushed glass fibers;
- (c) a dryer positioned to receive the crushed glass fibers from the first crusher, the dryer for drying the crushed glass fibers to form dried glass fibers having a mean average moisture content of less than about one weight percent;
- (d) a second crusher positioned to receive dried glass fibers from the dryer, the second crusher comprising at least one pair of rotatable, intermeshing rollers and a drive device for rotating at least one of the rollers such that each pair of rollers rotate at essentially the same speed, each roller having an outer surface comprising a plurality of protuberances, at least a portion of one protuberance of a first roller of the pair of rollers contacting a corresponding portion of at least one protuberance of a second roller of the pair of rollers for crushing scrap glass fibers passing therebetween to form secondary crushed glass fibers;
- and
- (e) a separating device positioned to receive the secondary crushed glass fibers from the second crusher, the separating device for separating the secondary crushed glass fibers into (1) a first portion of secondary crushed glass fibers having a mean average length of less than about 5 millimeters and (2) oversize dried waste material.
3 more elements
A system for producing glass fiber product from scrap glass fibers, the system comprising:
- (a) a waste material supply comprising waste material produced by a glass fiberizing process and comprising scrap glass fibers which have no more than about 1 weight percent of a coating composition;
- (b) a crusher positioned to receive scrap glass fibers from the waste material supply, the crusher comprising at least one pair of rotatable, intermeshing rollers and a drive device for rotating at least one of the rollers such that each pair of rollers rotate at essentially the same speed, each roller having an outer surface comprising a plurality of protuberances, at least a portion of one protuberance of a first roller of the pair of rollers contacting a corresponding portion of at least one protuberance of a second roller of the pair of rollers for crushing scrap glass fibers passing therebetween to form crushed glass fibers;
- (c) a dryer positioned to receive the crushed glass fibers from the crusher, the dryer for drying the crushed glass fibers to form dried glass fibers having a mean average moisture content of less than about one weight percent;
- and
- (d) a separating device positioned to receive the dried glass fibers from the dryer, the separating device for separating the dried glass fibers into (1) a first portion of dried glass fibers having a mean average length of less than about 5 millimeters and (2) oversize dried waste material.
2 more elements
A system for producing glass fiber product from scrap glass fibers, the system comprising:
- (a) a waste material supply comprising waste material produced by a glass fiberizing process and comprising scrap glass fibers which have no more than about 1 weight percent of a coating composition;
- (b) a dryer positioned to receive the waste material from the waste material supply, the dryer for drying the scrap glass fibers to form dried glass fibers having a mean average moisture content of less than about one weight percent;
- (c) a crusher positioned to receive dried glass fibers from the dryer, the crusher comprising at least one pair of rotatable, intermeshing rollers and a drive device for rotating at least one of the rollers such that each pair of rollers rotate at essentially the same speed, each roller having an outer surface comprising a plurality of protuberances, at least a portion of one protuberance of a first roller of the pair of rollers contacting a corresponding portion of at least one protuberance of a second roller of the pair of rollers for crushing dried glass fibers passing therebetween to form crushed glass fibers;
- and
- (d) a separating device positioned to receive the crushed glass fibers from the crusher, the separating device for separating the crushed glass fibers into (1) a first portion of crushed glass fibers having a mean average length of less than about 5 millimeters and (2) oversize dried waste material.
2 more elements
Dependencies are inferred from the claim text.