Apparatus for making reinforced wicket hole directionally tear p

Details Apparatus for making reinforced wicket hole directionally tear p Apparatus for making reinforced wicket hole directionally tear p

1975-07-03

1977-04-05

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

83 53, 83177, 425387R, B28B 148

Patent

active

040159175

ABSTRACT:
A plastic film packaging bag is fabricated with directionally tear-prone wicket mounting holes having a hole edge reinforcing bead of plastic selectively thinner in the desired tearing direction formed by a hot gas stream directed through shaped templates holding the bag.

REFERENCES:
patent: 1093084 (1914-04-01), Steventon
patent: 3092439 (1963-06-01), Harrison
patent: 3187380 (1965-06-01), Harrison
patent: 3805649 (1974-04-01), Hester
Western Electric Technical Digest No. 1, Jan. 1966, p. 27 "Method of and Apparatus for Explosive Hole Punching".
IBM Technical Disclosure Bulletin, vol. 8, No. 3, Aug. 1965 "Hole Fabrication by Electron Beam Method".

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