Patent GB-673174-A (GB)
Title: Folding and sealing machine for filled paper bags
IPC: B65B7/08
Filed: 1950-01-09
Abstract: 673,174. Packing machines. BRITISH SUGAR CORPORATION, Ltd., and SPRIGGS, G. E. Aug. 30, 1950 [Jan. 9, 1950], No. 547/50. Class 94(i). Apparatus for folding and sealing filled or partly-filled paper bags comprises a pair of galleries disposed one at a higher level than the other, with a platform having a raised part adapted to be reciprocated on the upper gallery and in its reciprocation to push successive bags deposited on the upper gallery into a position in which each bag drops in turn into the lower gallery, and concomitantly reciprocating mechanism associated with the lower gallery, including a box containing gum-applying mechanism, by which the folding and sealing of the bags and movement of the bags to a discharge position is effected. A filled bag 7 is placed on supports 1a of an upper gallery and moved therealong by a pusher 3, carried by arms 5c a on box 5, containing gumming mechanism, reciprocated by a crank 8. As the pusher 3 is moved back pivoted triangular tucker members 22 linked with the pusher are moved inwards from a vertical position to tuck in the sides of the neck of the bag. A platform 3a extends forwards from the lower surface of the pusher 3 beneath the supports 1a, and at its forwardmost position supports the filled bag above co-operating pivoted counterweighted doors 4 through which the bag drops to the lower gallery in front of the box 5 when the pusher 3 and thus the platform withdraws., the doors 4 closing together about the neck of the bag. The bag is then pushed forward by a baffle 19 on the box 5, the neck of the bag being pushed against a stationary abutment 31, a co-operating pivoted flap 29 being swung down, as the box moves back from a horizontal to a vertical position, to fold over the top of the bag, by a rod 10 secured to the box 5. A horizontal gumming blade 16 contacts the lower part of the neck of the bag when the box 5 is in its most advanced position, and when on its next forward movement the box 5 pushes the next bag along, the previous bag passes beneath the abutment 31 and a plate 33 which fold the folded part of the top of the bag on to the gummed lower part of the neck. As the bag passes under the plate 33 pivoted fingers 34, Fig. 6, carried by sliding rods 35 moved forwards by the box 5 and back by bends 10b on the rods 10, engage the bag neck on their forward movement, to define sharply a fold on the line of gum. The gumming mechanism includes, Fig. 5, a blade 11 pivotally mounted in the box 5 on a spindle 12. A pair of arms 14 pivoted at 15 to the machine frame are provided with slots 14a through which the spindle 12 extends, slides 13 secured to the spindle 12 and embracing the arms 14 causing the blade 11 to pivot to dip downwardly into gum contained in the base of the box 5 on the forward movement of the box and to move upwardly to contact the gum applying blade 16 on rearward movement of the box. The blade 16 is pivotally carried by the arms 14 and is maintained in a horizontal position throughout its backward and forward movement by a link 17 having a roller 17a running in a fixed cam groove 18. The platform 3 may operate a switch to actuate means to release a filled bag on to the platform.