Patent ID: 6009926
Filing Date: 2000-01-04
Classification: B65C,Y10T

Abstract:
A device for attaching adhesive labels to packaged goods, comprising:a compressed air source;a vacuum source;a pneumatic cylinder comprising air inlet openings, each opening alternatingly connected to either said compressed air source or said vacuum source by program-controlled two way valves;a main piston connected to an upper end of a hollow piston rod and guided between an upper and a lower dead center position in said pneumatic cylinder;said hollow piston rod having within said pneumatic cylinder a lateral air opening;a suction holder connected to a lower end of said hollow rod positioned external to said pneumatic cylinder and having an upper position when said main piston is in said upper dead center position and a lower position when said main piston is in said lower dead center position;said suction holder having a suction channel axially connectable to said hollow piston rod and closeable partially by a check valve relative said hollow piston rod,a pivotable label transfer unit having a label transfer position in which a respective label is positioned at a small distance below said suction holder positioned in said upper position;a control device for lowering said suction holder into said lower position for receiving the label;said control device comprising a control member that reciprocates vertically parallel to an axis of said pneumatic cylinder and cooperates with an abutment positioned external to said pneumatic cylinder at said piston rod or said suction holder;said main piston having a permanent magnet connected to an upper surface thereof;a counter ring consisting of ferromagnetic material connected to said pneumatic cylinder and positioned oppositely to said permanent magnet, when said main piston is in said upper dead center position;a travel sensor arranged at an exterior side of said pneumatic cylinder for controlling a required stroke of said main piston.