Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1998-07-17
2000-01-18
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
209525, B65G 4308
Patent
active
060162007
ABSTRACT:
The invention relates to a method and an apparatus for detecting toppled packages (2) lying on a conveyor (1). The apparatus includes two pairs of photocells, an upper (4) and a lower (5), disposed as transmitter and receiver of a light beam (6). The photocell pairs (4, 5) are placed on either side of the conveyor path (1) so that the light beam (6) bisects the conveyor path (1) at a certain angle. The apparatus also includes a magnet valve (16) and a device (1) for removing a toppled package (2). The lower photocell pair (5) transmits, when the light beam (6) is broken, a signal to the upper photocell pair (4) which, when the light beam (6) is unbroken, transmits a signal to the magnet valve (16). The magnet valve (16) activates the device (10) which, for example, consists of an air nozzle (11), so that the toppled package (2) is blown off from the conveyor (1).
REFERENCES:
patent: 4421542 (1983-12-01), Poad et al.
patent: 4542296 (1985-09-01), Kleinnibbelink
patent: 5531310 (1996-07-01), Itoh
Derwent's Abstract, No. 85-29933/05, week 8505, Abstract of SU, 1097540 (Veinberg VYA), Jun. 15, 1984.
Rosenberger Richard A.
Tetra Laval Holdings & Finance S.A.
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