Method and apparatus for scoring plastic sheet material

Details Method and apparatus for scoring plastic sheet material Method and apparatus for scoring plastic sheet material

1982-04-06

1983-11-15

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 71, 425456, B29C 1902

Patent

active

044155158

ABSTRACT:
Plastic sheet material used for forming box blanks are provided with soft, bendable score lines by applying frictional heat through rapid vibration. The sheet material is clamped under high pressure between a resilient make-ready and a scoring tool, and is subjected to the vibratory action which generates frictional heat sufficient to melt the plastic material at the engaged interface, thereby forming a score line along which the sheet material may be bent to form an assembled box. A completed box blank may be formed in a single operational step, by cutting the box, impressing the score lines, and impressing embossments, if required, simultaneously in a single operational cycle of seconds duration.

REFERENCES:
patent: 3635609 (1972-01-01), Balamuth
patent: 3907193 (1973-09-01), Heller
patent: 4028033 (1977-06-01), Bryant
patent: 4064206 (1977-12-01), Seufert
patent: 4352711 (1982-10-01), Toth

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