Patent GB-1282257-A (GB)
Title: An apparatus for packaging stacks of flat articles into packages
Inventor: DUCHINSKY YAKOV EFIMOVICH
IPC: B65B11/02
Filed: 1971-03-12
Abstract: 1282257 Apparatus for packaging stacks of flat articles IZDATELSTVO IZVESTIA 12 March 1971 6740/71 Heading B8C Apparatus for packaging a stack of flat articles such as newspapers 3 comprises an endless intermittently driven roller conveyer 1 adapted to support thereon a stack to be packaged, an openable frame 4 carried by a closed conveyer 6 intermittently driven in a vertical plane and adapted to engage the stack and wrap it along the top and two vertical sides with wrapping material arranged between the frame and the stack, and a pusher member 12 adapted to enter periodically the space between an adjacent pair of rollers of the conveyer 1 so as to introduce one free end of the wrapping material into the space. In this manner the said free end of the length of wrapping material is folded under the bottom side of the stack when the roller conveyer 1 is driven. As shown, a stack 3 is fed from a conveyer 2 on to the roller conveyer 1 and a conveyer chain 18, which carries a number of grippers 19, Fig. 2, is energized for rotation in a forward direction so that the bent leg of the spring-loaded pivoted jaw 21 of one of the grippers 19 closes as it passes a cam plate 23 to grip the leading end of a paper web 13 and unwind it from a reel as it passes through clutch rolls 30 and over a roller 32 on a vertically movable support 31. An electric motor 35 then raises the support 31 by means of rack- and-pinion mechanism 33, 34 so that the paper web 13 is forwarded by the said gripper 19 to overlie the stack 3. Depending upon the height of the stack, a greater, or lesser, length of paper web 3 is unwound from the reel according to whether the jaw 21 of the gripper 19 carrying the paper web 13 abuts a fixed abutment 24 or, a movable abutment 25 which can be lowered into the path of the jaw 21, in advance of the abutment 24, by a solenoid 29 and rack-and-pinion mechanism 26, 27. Thereafter the drive to the conveyer 6 is energized and the frame 4, guided by rollers 8 which engage in guides, such as 7 along the vertical and horizontal runs of the conveyer 6, is lowered about the stack 3 to fold the paper web 13 over the top and down the sides of the stack. The drive to the conveyer 6 is then stopped and, when a clamping plate 63 of the frame engages the stack 3, the support 31 with the roller 32 is lowered into its initial position. An electro-magnet 17 is then energized so that, by means of rack-and-pinion mechanism 14, 15, it effects a downward stroke of the pusher 12 which introduces the free end of the paper web 13 between a pair of rollers 11 of the conveyer 1 the electro-magnet 17 then being deenergized to allow the pusher 12 to be raised by a spring (not shown). Thereafter the conveyer 1 is energized to pull the fre end of the paper web under the bottom side of the stack the web being severed by cutters 36, 36 and glued by rollers 40, 42. The conveyer 6 is again driven to carry the stack 3 from the conveyer 1 and fold the severed and glued end of the paper web under the stack where it becomes glued to the first end of the paper web, the drive to conveyer 1 being stopped and the support 31 being raised, ready for wrapping the succeeding stack, when the stack clears the roller 32. The frame 4 carries the stack along rollers 45 to a support table 59 which is raised so that punches 46, 47, Fig. 3, enter respective dies 48 and staple together the ends of the paper web.