Method of producing a non-cutting tear-off line and the products

Details Method of producing a non-cutting tear-off line and the products Method of producing a non-cutting tear-off line and the products

1990-02-28

1992-04-14

Marcus, Stephen

Bottles and jars

Closures

Frangible member or portion

215256, 220266, 220276, B65D 4132

Patent

active

051039893

ABSTRACT:
According to the invention, a metallic product of a thickness less than or equal to 1 mm is compressed between a narrow elongated relief (2, 3) and an alternating succession of reliefs (10) and hollows (11) disposed opposite this narrow relief (2, 3), the differences in level between the said alternating reliefs (10) and hollows (11) being transverse in respect of the said narrow relief (2, 3), the compression stress being such that the minimum thicknesses of the said metallic product after compression are comprised between 0.01 and 0.15 mm. This method makes it possible to obtain tearing lines which have no injurious rough portions. The invention likewise relates to the products obtained and is particularly interesting in the field of packaging.

REFERENCES:
patent: 1542097 (1925-06-01), Ripley
patent: 1575223 (1926-03-01), Nordquist
patent: 1623223 (1927-04-01), Widell
patent: 3142280 (1964-07-01), Heinle
patent: 4504181 (1985-03-01), Khoury
patent: 4763807 (1988-08-01), Schreiber et al.

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