Apparatus for perforating roofing sheet material

Details Apparatus for perforating roofing sheet material Apparatus for perforating roofing sheet material

1975-04-10

1976-10-05

Meister, J. M.

Cutting

By tool inside hollow work

One tool having only rectilinear motion

83 54, 83552, 83564, 83639, B26F 102

Patent

active

039837734

ABSTRACT:
The apparatus of the present invention comprises at least one hole-punching device operated by a pneumatic cylinder for driving a punch rod through the peripheral surface and radially to the center of a roll of roofing sheet material. The method of the invention provides for the steps of preparing the sheet roofing material, winding the sheet into a roll, and punching a plurality of perforation holes in the roll from the surface to the center thereof.

REFERENCES:
patent: 390327 (1888-10-01), Wheeler
patent: 2326536 (1943-08-01), Hartsock et al.
patent: 2354860 (1944-08-01), Hartsock et al.
patent: 2697264 (1954-12-01), Queberg
patent: 2767459 (1956-10-01), Holman et al.
patent: 2829983 (1958-04-01), De Gain
patent: 3114280 (1963-12-01), Schott

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