Tearability imparting apparatus

Details Tearability imparting apparatus Tearability imparting apparatus

1996-01-22

1998-06-02

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493228, 493355, 493363, 493364, 493930, 531336, 531338, B65B 6100, B65B 902

Patent

active

057591458

ABSTRACT:
An apparatus for imparting a tearable region to a pre-formed pouch. A lower block has a flat surface on which is provided a lower perforating member that corresponds to a corner of the unsealed pouch. The lower perforating member has been formed by depositing a large number of particles having acute corners and a Mohs hardness of not less than 5 on the lower block flat surface. An upper block with an upper perforating member that corresponds to the corner of the pouch is arranged above the lower block. The upper perforating member has been formed by depositing a large number of particles having acute corners and a Mohs hardness of not less than 5 on the upper block flat surface. The upper perforating member opposes the lower perforating member. The upper block is moved towards the lower block, pressing the acute corners of the particles into opposing surfaces of the preform, sealing the pouch with a tearable area.

REFERENCES:
patent: 2923052 (1960-02-01), Marogg
patent: 3359773 (1967-12-01), Stuchbery
patent: 4176567 (1979-12-01), Weisberg
patent: 4386925 (1983-06-01), Focke
patent: 5257923 (1993-11-01), Kagawa
patent: 5430987 (1995-07-01), Lane, Jr. et al.

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