Method and apparatus for testing the base folds of open and fini

Details Method and apparatus for testing the base folds of open and fini Method and apparatus for testing the base folds of open and fini

1979-02-15

1981-03-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356386, G01N 2186

Patent

active

042582679

ABSTRACT:
In the production of sacks or bags provided with soldered bases, the correct folding of the bases is verified while the bags are being successively conveyed transversely to their longitudinal axes and while they are in a flattened condition with each folded base perpendicular to the remainder of the bag. Verification is effected by photocells activated by a cam plate of the bag-making machine. The photocells are electrically connected to circuits which compare certain dimensions of the bases with desired values therefor, a defective bag destined to be eliminated being indicated by a departure from the desired value.

REFERENCES:
patent: 3549890 (1970-12-01), Keller
patent: 3621266 (1971-11-01), Akuta et al.
patent: 4064534 (1977-12-01), Chen et al.
patent: 4166029 (1979-08-01), Rhotert

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