Package scoring apparatus

Details Package scoring apparatus Package scoring apparatus

1991-05-20

1992-12-08

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Sets of shaping couples comprising an endless surface for...

264284, 425363, 425385, 493403, B29C 5904, B31B 125

Patent

active

051696517

ABSTRACT:
A method and apparatus for forming a fold line in a sheet of semi-rigid thermoplastic material including supporting the sheet on cylindrical rollers as the sheet is drawn forwardly along the creasing path through a creasing zone and applying a sequence of heated creasing rollers with each roller penetrating the surface of the sheet an increasing amount and immediately following the creasing by a caliper roller having shoulders for flattening the shoulders in the plastic formed beside the crease.

REFERENCES:
patent: 2728950 (1956-01-01), Annesser
patent: 2941560 (1960-06-01), McCaffery
patent: 3292513 (1966-12-01), Palmer
patent: 3320225 (1967-05-01), Bradbury
patent: 3379814 (1968-04-01), Bracey, Jr.
patent: 3704975 (1972-12-01), Bunting, Jr. et al.
patent: 3706251 (1972-12-01), Wheeler et al.
patent: 4061457 (1977-12-01), Butler
patent: 4080878 (1978-03-01), Gallagher et al.
patent: 4213550 (1980-07-01), Bonaddio
patent: 4946430 (1990-08-01), Kohmann

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