Patent GB-681568-A (GB)
Title: Improvements in or relating to machines for making paper containers
IPC: B31B17/00
Filed: 1950-03-29
Abstract: 681,568. Paper bottle making machines; cartons. NATIONAL PAPER BOTTLE CO., Inc. March 29, 1950 [April 6, 1949], No. 7845/50. Classes 18 and 66 A machine for completing a paper bottle from a container body provided by the mechanism described in Specification 681,567 comprises a turntable having a number of container body receiving cells which is operated to pass the container body through a number of stages to complete a bottle as shown in Fig. 11. During the various stages a cell is initially loaded with a container body whereafter the body is fluted, necked and has its mouth shaped, a bottom forming member is pressed out of a strip of material, shaped and inserted into the bottom end of the container body, the bottom end edge of the container body and the flange. of the bottom forming member are rolled inwardly together, and finally the completed bottle is ejected from 'the turntable. The bottle body forming mechanism described in Specification 681,567 comprises four rotatable mandrels mounted at right angles to each other on a revolving turret and adapted to take the paper blanks and pass through the various container body forming stages until at their final stage the container body is stripped from its associated mandrel. The turntable 50 has six container body receiving cells 66 equally circumferentially spaced and each in turn adapted to be positioned beneath the mandrel which is at the container body stripping stage so that the container body is ejected into the corresponding cell 66. The turntable is rotated synchronously with the turret and after a cell 66 has received a container body the turntable is rotated to bring the cell to a position in which the container body is fluted, necked and has its mouth shaped. A glue applicator is also provided at this stage for applying glue to the inside of the bottom end of the container body prior to the bottom forming member being inserted at the next stage. For this purpose an anvil body 151 has grooves 152 and is mounted on the end of a rod 155 adapted to be reciprocated to project the anvil body 151 into the container body at this stage, see Fig. 35. Simultaneously a cylinder 285 having segmental neck and mouth shaping members 295, 265 is raised so that the container body part b is pressed between the anvil body and segmental members to the desired shape. The glue applicator comprises an expansible ring 176 which is lowered with the anvil body 151 until it reaches its operative position whereupon it is compressed and transmits glue on its outer face to the inside of the container body base. Upon completion of these operations the anvil, glue applicator and segments 295,265 are withdrawn, and the turntable rotates to carry the container body in its cell to the next stage where it receives the bottom member. At this stage a strip of material p is continuously advanced by rollers beneath a piston member 375, Fig. 44, which is housed in a casing 371 and operated by compressed air to project into an opening defined by a cutting ring 390 over which the strip passes so as to cut a disc from the strip. A second piston member 396 is located in the first member 375 and after the disc has been cut the second member 396 is advanced to push the disc through an aperture formed by a flange 393 so as to turn up the edge of the disc thereby forming the bottom member S for the container body and then insert it into the end of the container body. At the next stage a compressible ring 85 in the cell 66 is operated to secure the end of the container body slightly indenting it and preventing movement of the bottom member S whilst a spinning head 502 provided with grooved roller 503, Fig. 53, is lowered to roll the end of the container body and the upturned flange of the bottom member S over. together. Finally the completed bottle in its cell is received at an ejecting stage which comprises an air tube 557. Fig. 58, which is inserted into the mouth end of the bottle and through which air is forced to eject the bottle into a shoot where it is transferred to a packing station. A feeler member is associated with the air control valve means and serves to prevent operation of the strip feeding and bottom inserting mechanism should a cell arrive at this stage devoid of a container body. Specification 681,569 also is referred to.