Sheet rupturing

Details Sheet rupturing Sheet rupturing

1979-05-07

1981-06-02

Yost, Frank T.

Severing by tearing or breaking

Methods

225 2, 225 935, B26F 306

Patent

active

042706823

ABSTRACT:
A cutter and cutting method for cutting synthetic resin sheets or ribbons in a manner that avoids the formation of particulates from the cutting operation are disclosed. The cutter includes a blade and associated sheet holding structure for creating a sharp bend in the sheet. The sharp bend creates a zone of high stress in the sheet. An element for rapidly heating the sheet is brought near the edge of the blade where the fold in the sheet exists. The localized stress in the fold cause the sheet to rupture along the fold after the sheet has been heated to a sufficient extent.

REFERENCES:
patent: 2293178 (1942-08-01), Stocker
patent: 2524584 (1950-10-01), Zehr
patent: 2982456 (1961-05-01), Hsu et al.
patent: 2994108 (1961-08-01), Bjorksten
patent: 3739963 (1973-06-01), Michalik
patent: 3750504 (1973-08-01), Sidler
patent: 3782615 (1974-01-01), Webster et al.
patent: 4014229 (1977-03-01), Lynch

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