Labeling machine for applying labels to polygonal containers

In a labeling machine for applying label to containers of quadrilateral transverse cross-sectional configuration and defining external side walls forming external corners extending longitudinally thereof along the sides of the container, said machine including a label supply hopper, a glue applying station, and a labeling station including means for supporting and rotating the container to be labeled about a horizontal axis at the labeling station with the container longitudinal axis coincident with said horizontal axis, and means for feeding labels longitudinally thereof along a predetermined feed path from the hopper through the glue applying station to a label applying relation position with the container at the labeling station, the improvement wherein:

• said means for supporting and rotating the container comprises:
• a pair of spaced apart holder members journalled for rotation about said axes,
• means for holding said holder members against movement laterally of said axes,
• said holder means including means for mounting one of the containers therebetween by engaging the ends thereof for rotating same about said axes,
• means for synchronously rotating said holder members about said axes to rotate the container held thereby about said axes whereby the container corners rotate in a circular path that is concentric with said axes,
• said glue applying station including means for applying glue to the underside of the label when received from said label supply station,
• and said feeding means including a rotatable label feed roller paralleling said axes and journalled relative thereto to dispose the periphery of said feed roller in close adjacency to but spaced from said container corner circular path,
• said feed roller also being disposed below the level of said axes and in overlying relation to said feed path,
• a label feed guie mounted below said feed roller and including guide surfacing concentric with said feed roller periphery and disposed to direct the leading end of a label to be applied to the container to the label applying position,
• means for rotating said feed roller oppositely of the direction of rotation of said holder members at a speed whereby said feed roller periphery has a surface speed approximately the speed of the container corners along said circular path,
• and including a label wiping device mounted between said container supporting means and the hopper above and adjacent to said feed roller and comprising:
• a brush member mounted to parallel said axes and including a projecting brush flap,
• said flap being proportioned and positioned for wiping engagement with the side walls of the container mounted by said holder members, adjacent the label applying position, when the container is supported by said supporting means,
• means for maintaining said brush member flap is biased relation against the container side walls when said holder members are rotated,
• said rotating means rotating said holder members in the direction that moves the container corners consecutively past said feed roller and said brush member in that order,
• whereby, when a container to be labeled is rotated by said holder members and a label to be applied to the container is moved to said label applying relation position, the label is wiped on the container about said side walls and corners thereby by the wiping engagement of the brush member flap with the container,
• said brush member being mounted for movement laterally of said axes,
• and said maintaining means comprising fluid cylinder means for effecting said brush member biased relation,
• said brush member being mounted for oscillating movement about its longitudinal axis,
• and means for effecting limited back and forth oscillating movement of said brush member on movement of said brush member laterally of said axes whereby the label leading end is subjected to an oscillating brushing action of said flap thereagainst and against the container.