Title: Paper felt and process for making the same

Abstract: The process for producing roofing felt which is softer, more flexible and more fire-resistant than such felt commonly produced by the prior art and which consists of permeating the felt stock with a treating fluid comprising a mixture of oil and soda ladened water, next drying the treated felt stock to remove excess moisture therefrom, next impregnating the felt with heated molten asphalt, next permitting excess molten asphalt to drain therefrom and finally permitting the asphalt in the felt to cool.

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Inventors: Bell, David B. (Long Beach, CA, US)

Application Number: 473307
Filing Date: 1974-05-24
Publication_date: 1976-03-09
Assignee:
Primary Class(es): 427/302 162/171, 162/179, 427/322, 427/374.4, 427/385.5
Other Classes:
US Patent Ref:

1417840	May, 1922	Kirschbraun	117/60.
2801937	Aug, 1957	Hess	117/92.
3711314	Jan, 1973	Campbell	117/56.

Other Refs:
Primary Examiner: Lusignan, Michael R.
Assistant Examiner:
Attorney: Maxwell; Georges A.