Apparatus for forming flexible fold lines in a thermoplastic she

Details Apparatus for forming flexible fold lines in a thermoplastic she Apparatus for forming flexible fold lines in a thermoplastic she

1985-07-29

1987-02-10

Larson, Lowell A.

Manufacturing container or tube from paper; or other manufacturi

With cutting, breaking, tearing, or abrading

Including application of heat

425296, 425307, 425316, 425394, 425396, 493355, 493396, 493470, B05B 114

Patent

active

046420860

ABSTRACT:
There is provided an improved apparatus for forming foldable box blanks from a thermoplastic sheet by forming flexible fold lines in the thermoplastic sheet, with the apparatus including a plurality of scoring tools and a flat plate having a plurality of grooves formed therein opposite to the scoring tools. In addition, the apparatus includes means for heating the scoring tools to less than the melting temperature of the thermoplastic sheet. In this manner, when the heated scoring tools engage the thermoplastic sheet, it is deformed on its upper surface by the scoring tools and on its lower surface by the grooves in the grooved plate to form a plastic sheet having the desired flexible fold lines.

REFERENCES:
patent: 3271560 (1966-09-01), Schott
patent: 3359773 (1967-12-01), Stuchbery
patent: 4179252 (1979-12-01), Seufert
patent: 4373929 (1983-02-01), Smith
patent: 4386925 (1983-06-01), Focke

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