System for the transport and raising of packing container blanks
AssigneeTetra Pak International AB
InventorAlf Billberg
Life of this patent
Estimating the term…
Abstract
A system for the transport and raising of packing container blanks to be utilized in packing machines which convert flattened, tubular packing container blanks to filled and closed packages. A simple and space-saving arrangement of this invention comprises gripping elements (10) placed along a conveyer (5) which in a continuous movement take up a blank (1) from the conveyer and raise the same to a square cross-section and pass it on in raised position.
Claims23
A system for delivering unfolded packing containers from a source of flattened, tubular packing container blanks, said system comprising a feeding conveyor for conveying flattened blanks from said source along a conveyor path and a set of gripping elements at a fixed location spaced from said source along said conveyor path, said conveyor moving past said set of gripping elements said set of gripping elements including at least one primary gripping element, at least one secondary gripping element extending above said conveyor path and means for pivoting said primary gripping element about an axis transverse to and above said conveyor path between an inclined position relative to said conveyor path and a second position above said conveyor path, said primary gripping element at said inclined position extending below said conveyor path and defining a guide from the conveyor onto said secondary gripping element, said primary gripping element pivoting toward said secondary gripping element as said primary gripping element moves to said second position so to unfold the blank and to position the blank above said conveyor path.
A system for delivering unfolded packing container blanks, said system comprising:
- a magazine for containing a supply of folded packing container blanks;
- a conveyor for conveying folded packing container blanks from said magazine along a path;
- and
- a plurality of stations at fixed, spaced apart locations along said path after said magazine, said conveyor moving past said stations, each station having:
- a secondary gripping arm defining a secondary catch above said conveyor for receiving a forward edge of a conveyed folded packing container blanks, a primary arm mounted for pivoting movement about a fixed axis transverse to and above said path from an inclined position relative to said path to a raised position above said path, said primary arm at said inclined position extending below the path of said conveyor and defining a guide onto said secondary arm for the conveyed folded packing container blank, said primary arm including a primary catch for engaging the trailing edge of the conveyed folded container blank, and means for reciprocating said primary arm from said inclined position to said raised position so to lift said packing container blank above said conveyor and to cooperate with said first gripping arm to unfold said packing container.
A catching device suitable for catching folded container blanks being moved along a first conveyor path by a conveyor moving past said catching device and for raising each caught blank above said conveyor path in an unfolded state, said folded container blanks having a forward folded edge and a trailing folded edge, said catching device comprising:
- a secondary arm defining a secondary catch above said conveyor path for receiving the forward folded edge, said secondary arm having surfaces leading to said secondary catch;
- a primary arm pivotable about an axis transverse to and above said conveyor path from an inclined position to a raised position, said primary arm at said inclined position intercepting said conveyor path at an incline and defining a guide onto said secondary arm, said primary arm including a primary catch for receiving the trailing folded edge, said primary catch being positioned below said conveyor path when said primary arm is at said inclined position, said primary catch being positioned above said conveyor path when said primary arm is at said raised position so as to unfold said container blank in cooperation with said secondary catch;
- and
- means for reciprocating said primary arm between said inclined and raised positions.
Dependencies are inferred from the claim text.