Device for correctly positioning the film relative to the articl

Details Device for correctly positioning the film relative to the articl Device for correctly positioning the film relative to the articl

1980-04-15

1983-05-03

Sipos, John

Package making

Register control

53 64, 53131, 53550, 493 35, B65B 5704, B65B 5712

Patent

active

043816371

ABSTRACT:
In a machine for wrapping individual articles with a thermoplastic film, a device is provided for correctly positioning the film, which is for example printed with certain symbols, relative to the articles. Said device comprises a mechanism for detecting at every instant the position of an article, a photoelectric cell for detecting the position of the film and a comparison circuit which receives signals from both the detecting means. The comparison circuit comprises logical gates (of AND type) and storage means and is associated to timing means for actuating a motor so as to increase or reduce the speed of the film consistently with the positive or negative results of the speed comparison made by the comparison circuit, or to leave said speed unaltered when the phase relationship between the film and the articles has been found correct.

REFERENCES:
patent: 2296142 (1942-09-01), Campbell
patent: 2977730 (1961-04-01), Ardner
patent: 3411767 (1968-11-01), Moser et al.
patent: 3589095 (1971-06-01), James
patent: 3789574 (1974-02-01), Weikert

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