DEVICE TO CHECK AND DISCARD LENGTHS OF WRAPPING MATERIAL (FOIL) IN VERY HIGH SPEED PACKET CIGARETTE PACKERS

摘要

ABSTRACT OF THE DISCLOSUREThe invention provides an apparatus for checking anddiscarding lengths of wrapping material in high speed cigarettepacking machines comprising: a conveyor, an intermittentdrive having compartments for feeding bundles of cigarettes fromtheir assembly zone to a final position from which they aretransferred to a first wrapping station; at least one controldevice placed along the conveyor to check for missing or faultybundles; means for ejecting faulty bundles placed along theconveyor downstream of the or each control device and controlledthereby; a feed line for feeding lengths of wrapping materialin a direction substantially perpendicular to the advancedirection of the bundles to a take-up position in the path ofthe bundles between the final position and the first wrappingstation; a retractable step on which the ends of the lengths ofwrapping material abut beyond the take-up position; and meansfor transferring the bundles of cigarettes together with alength of wrapping material from the final position to the firstwrap station; at least one wheel adapted to be driven in contin-uous rotation in the path of said lengths of material beyondsaid take up position; and means responsive to the or each controldevice for engaging said wheel with the length of wrappingpaper in the take-up position and retracting said step todiscard said lengths when a faulty or missing bundle isdetected.