METHOD FOR PRODUCING ROOFING FELT

METHOD FOR PRODUCING ROOFING FELT An improvement in the method of perforating roofing felt, which is comprised of felt saturated with an asphaltic material, comprising perforating said roofing felt with a plurality of needles heated to a temperature of 200 to 600.degree.F above the softening point o...

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Bibliographische Detailangaben
1. Verfasser:	HALASZ, ANDREW
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BUILDING FIXED CONSTRUCTIONS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR GUTTERS LAUNDERING ROOF COVERINGS ROOF-WORKING TOOLS SKY-LIGHTS TEXTILES TREATMENT OF TEXTILES OR THE LIKE WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL
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Beschreibung
Zusammenfassung:	METHOD FOR PRODUCING ROOFING FELT An improvement in the method of perforating roofing felt, which is comprised of felt saturated with an asphaltic material, comprising perforating said roofing felt with a plurality of needles heated to a temperature of 200 to 600.degree.F above the softening point of said asphaltic material, thereby forming small discrete passages through said roofing felt corresponding to said needles.