Patent ID: 6971979

Claim:
A box-gluing machine comprising: transport means including two transversely spaced and parallel conveyors extending in a transport direction for gripping and continuously advancing a succession of box blanks in a transport direction along a path; treatment means along an upstream portion of the path for folding and applying glue in strips to the blanks as they are advanced by the conveyors; sensor means downstream of the treatment means for detecting defective blanks gripped by the conveyors; a vertically displaceable blade between the conveyors downstream of the sensor means and displaceable between a use position engageable with a box blank being advanced by the conveyors and an inactive position unengageable with a box blank being advanced by the conveyors; actuator means connected to the blade and to the sensor means for displacing the blade into the use position when a defective blank is detected and passes the blade and for thereby severing the defective box blank into at least two side parts each gripped by a respective one of the conveyors; and respective extraction means downstream of the blade and outside the belt conveyors for pulling the side parts transversely in opposite directions through the respective conveyors out of the machine.