Patent GB-1047881-A (GB)
Title: Improvements in or relating to feeding devices for cigarettes or the like
Inventor: SCHMALZ KONRAD
IPC: A24C5/34
Filed: 1963-04-09
Abstract: 1,047,881. Cigarette-making machines. H. FOCKE and L. UHINK, [trading as FOCKE & PFUHL]. April 9, 1963, No. 14117/63. Heading A2C. A device for testing cigarettes comprises a testing chamber 20 having an open end, means for bringing a cigarette to be tested to a loading position in alignment with the chamber and adjacent the open end, and means for applying suction to the chamber so that atmospheric pressure urges the cigarette at the loading position into the chamber. The cigarettes are delivered in aligned pairs by a cutting drum 2 to a suction transfer drum 3 from which they are tranferred to grooves 5 on a drum 12. The drum 12 is formed as a suction drum having air holes 4, common passages 4a, a conduit 7 connected to a vacuum pump and a passage 8 leading to a port 9 in control rings 16 and 17. The end portions of the drum 12 each have a testing chamber 20 in alignment with each of the troughs 5 extending between the end portions. Each chamber 20 has one open end adjacent the associated trough 5 and at the other end a part 19 which connects with a suction port 18. Suction is applied to the port 18 during that part of rotation of the drum which follows the transfer of the cigarettes from the drum 3 to the drum 12 and after suction has been cut off from the troughs 5 via the port 9. The cigarettes are thus drawn into the chambers 20. The chambers 20 have restricted end portions 20a, 20b of such a diameter as to fit correctly sized cigarettes. The space between the portions 20a, 20b has ribs 20c interconnected by holes 20e and is connected to a passage 20f communicating with a passage 23 leading to a port 22 in the ring 16 or 17 to which suction is applied after the cigarette has been drawn into the chamber 20. At the same time ambient air is applied via a port 28 and passage 24 to one side of a piston valve 25. When the applied suction produces a lower pressure than atmospheric in passage 20f, valve 25 moves from the position shown in Fig. 6 to a seating 27 and closes a passage 30 extending to a port 31 in the rings 16 or 17. The valve 25 is such that it is moved only if the cigarette has no leaks or a soft end which allows the end of the cigarette to travel beyond the portion 20a. As the drum 12 rotates further compressed air is supplied to port 31. If the cigarette is faulty and valve 25 has not been operated the compressed air reaches the port 19 and ejects the cigarette. If the cigarette is sound no such ejection occurs until the drum has rotated further and a port 33, supplied with compressed air, comes into register with port 19, the sound cigarettes being then discharged onto an endless conveyer. The rings 16, 17 have a line of ports 40 to which compressed air is applied for clearing the various passages in the drum 12, and also a port 42 from which suction is applied to a passage 24 to restore the valve 25 to its original position. In an alternative embodiment (Fig. 7, not shown) every cigarette is fed into a groove 5 and tested at one end of the drum 12 in a chamber 20. Alternate grooves 5 are, however, provided with retractable stops which arrest every other good cigarette being expelled from chamber 20 half way along the groove so that the good cigarettes are delivered in two rows.