Method and apparatus for cutting sheet material with preprocesse

Cutting – Processes – Plural cutting steps

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83 56, 83 71, 83520, 83747, 83753, 364475, D06H 700, B26D 110

Patent

active

043276156

ABSTRACT:
A method and apparatus for cutting multi-ply layups of limp sheet material employs an automatically controlled machine with a knife blade and a controller for guiding the blade along cutting paths defined by a marker of pattern pieces. The marker contains a plurality of pattern pieces in a closely packed array which causes the pattern pieces and segments of the cutting paths to be in contact or in close proximity to one another, and makes accurate cutting difficult or impossible. Digitized data defining a cutting program for the marker is preprocessed in a data processor to identify critical segments of cutting paths where cutting difficulties may arise and introduces into the data remedial command signals that guide the cutting blade past the identified critical segments for more accurate cutting.

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patent: 3864997 (1975-02-01), Pearl et al.
patent: 3887903 (1975-06-01), Martell
patent: 4133234 (1979-01-01), Gerber
patent: 4133235 (1979-01-01), Gerber
patent: 4140037 (1979-02-01), Gerber
patent: 4178820 (1979-12-01), Gerber

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