Patent ID: 6698343
Filing Date: 2004-03-02
Classification: A01F,B30B

Abstract:
In a baler having a baling chamber, which is generally rectangular in cross section, for producing parallelepiped bales, a baling piston mounted for reciprocating within a defined longitudinal section of the baling chamber for compacting crop to form a bale, a driver coupled for effecting reciprocating movement of said baling piston and a needle assembly including arms mounted to said baling chamber for pivotal movement about a horizontal transverse axis between standby and tying positions, the improvement comprising: at least said longitudinal section of said baling chamber having separate upper and lower parts; said upper part defining a top wall of said longitudinal section of the baling chamber and including a first set of opposite side walls respectively located at opposite sides of, and extending down from, said top wall; said lower part defining a bottom wall of said longitudinal section of the baling chamber and including a second set of opposite side walls respectively located at opposite sides of, and extending up from, said bottom wall and respectively overlapping said first set of opposite side walls of said upper part; said top and bottom walls being arranged parallel to each other; said upper part being mounted for vertical movement relative to said lower part so as to maintain said top and bottom in parallel relationship to each other and for the purpose of changing the cross section of at least said longitudinal section of said baling chamber between maximum and minimum heights; and an actuator assembly being coupled between said upper and lower parts for effecting said relative movement between said upper and lower parts.