Apparatus for making perforated roofing material

Details Apparatus for making perforated roofing material Apparatus for making perforated roofing material

1988-01-26

1989-04-11

Yost, Frank T.

Severing by tearing or breaking

Breaking or tearing apparatus

Combined with preliminary weakener or with nonbreaking cutter

83103, 225 93, 225 97, 225 99, B26F 302

Patent

active

048198480

ABSTRACT:
A perforated web-like bituminous roofing material comprising a perforated, bituminized carrier, at the side facing, in the condition of use, the roof area to be coated, is provided with a metal foil leaving clear the perforations in the bituminized carrier. The roofing material can be manufactured by finishing one side of a perforated bituminized carrier with fine sprinkling material and coating the other side with an imperforate metal foil, and subsequently removing the metal foil at the perforations.

REFERENCES:
patent: 2021716 (1935-11-01), Douthett
patent: 2353680 (1944-07-01), MacNutt
patent: 2453599 (1948-11-01), Schlegel
patent: 2526811 (1950-10-01), Dawson
patent: 4220272 (1980-09-01), Danti
patent: 4287248 (1981-09-01), Gessner et al.
patent: 4584753 (1986-04-01), Eckold et al.

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