초록 ▼

To improve the efficiency of powerful packaging machines for cigarettes or the like, the blanks (10) for wrapping the cigarettes or the like are monitored in respect of correct formation whilst being conveyed along a blanks path (27) to a revolving folding unit (28). Bifurcate photoelectric barriers

To improve the efficiency of powerful packaging machines for cigarettes or the like, the blanks (10) for wrapping the cigarettes or the like are monitored in respect of correct formation whilst being conveyed along a blanks path (27) to a revolving folding unit (28). Bifurcate photoelectric barriers are positioned on side regions of the blanks path (28) as monitoring units (40, 41). These barriers monitor the state of folding flaps (19. .24), arranged at the side, of the transported blanks (10).

대표청구항 ▼

[ What is claimed is:] [1.] A device for manufacturing hinge-lid packs for cigarettes by wrapping the contents of each pack in at least one blank made of thin cardboard or similar packaging material, wherein individual blanks have folding flaps defined along edges of the blanks by punching or fold l

[ What is claimed is:] [1.] A device for manufacturing hinge-lid packs for cigarettes by wrapping the contents of each pack in at least one blank made of thin cardboard or similar packaging material, wherein individual blanks have folding flaps defined along edges of the blanks by punching or fold lines, wherein said folding flaps include side flaps (19, 20), lid side flaps (21, 22), base corner flaps (23) and lid corner flaps (24), and wherein said blanks are fed one after another along a blanks path (27) into a folding unit (28), said device comprising:a) means for feeding the elongated blanks (10) in a longitudinal conveying direction along the blanks path in an unfolded, flat state, with their length extending in the conveying direction in such a way that the folding flaps (19 to 24) lie in a position transversely directed with respect to the conveying direction and are successive in the conveying direction;b) in a region of the blanks path (27), opto-electronic monitoring units (40, 41) for monitoring the unfolded blanks (10) and providing a control signal indicative of presence and a correctness of formation of the folding flaps (19 to 24),c) wherein said monitoring units (40, 41) are located on both sides of the blanks path (27) and monitor the successive folding flaps (19 to 24) on both sides of the blanks (10), andd) wherein each monitoring unit (40, 41) defines a photoelectric barrier which comprises a transmitter (63) and receiver (64), said transmitter transmitting a test light beam (65) which is directed to said receiver and at the blank (10) in a region of the folding flaps (19 to 24) and which is picked up by the receiver (64);e) conveying means, responsive to said control signal, for separating, and conveying out of the blanks path, incorrect blanks (10) exhibiting missing or incorrectly formed folding flaps; andf) an upper guide member (31) and a lower guide member (32), between which the folding flaps of the blanks (10) are conveyed,g) wherein the upper guide member (31) and the lower guide member (32) comprise guide walls extending along the blanks path (27) in the conveying direction, and wherein breaks in the upper guide member (31) and lower guide member (32) allow the monitoring units (40, 41) to pass through, andh) wherein the distance between the upper guide member (31) and the lower guide member (32) is less than the distance between the transmitter (63) and the receiver (64) of the photoelectric barrier.