fig1 shows an embodiment of a baler 10 , having a frame 12 that is supported via a chassis 14 on the ground 16 . the baler 10 shown is designed in the form of a round baler and can be used both in the agricultural field and in the industrial field for producing a cylindrical bale , typically referred to as a round bale , from crop material , but also from trash , paper , sheet material or fabric , cotton , tobacco etc . such a baler 10 can be towed by a working vehicle , for example in the form of an agricultural tractor , not shown , or can be constructed to be self - propelled . according to the embodiment shown , a drawbar 20 is provided on the front side of the frame 12 in order to be able to hitch the baler 10 to an agricultural tractor , not shown , and tow it across a field . a receiving device 22 in the form of a pickup is used for receiving crop lying on the ground 16 , e . g . hay or straw deposited in a swath . the crop picked up by the receiving device 22 is fed to an inlet 24 of a baling chamber 26 and wound up there in a spiral shape to form a cylindrical bale , tied and subsequently deposited on the ground 16 . a lower stationary roller 28 and two upper stationary rollers 30 , 32 are positioned at the inlet 24 of the baling chamber 26 . the baling chamber 26 is additionally formed by an endless pressing means 34 , which is designed in the present embodiment in the form of two adjacent pressing belts side by side and is guided about a plurality of stationary rollers 36 , 38 , 40 , 42 and movable rollers 44 , 46 , 48 , 50 , 52 , 54 , 56 . the pressing means 34 has an outer side 34 a facing the frame 12 and an inner side 34 b . while the baling chamber 26 is surrounded peripherally substantially by the pressing means 34 and the rollers 28 , 30 and 32 , it is delimited laterally by side walls that are not shown . four rollers 50 , 52 , 54 , 56 among the movable rollers 44 - 56 are mounted freely rotatably in a lower region 58 of a delta - shaped carrier 60 , which is pivotably articulated at its upper vertex 62 about an axle 64 running transversely to the forward direction and can be brought by an actuator ( not shown ) from the bale - forming position shown in fig1 into a bale ejection position , pivoted upward and to the rear . a tensioning mechanism 66 for tightening the pressing means 34 has a tensioning lever 68 that cooperates with a first tensioning element , not shown , and a tensioning arm 72 that cooperates with a second tensioning element 70 . both the tensioning element that is not shown and the tensioning element 72 can be designed in a conventional manner as , and / or can comprise , a mechanical spring or a hydraulic motor . the tensioning lever 68 is mounted in the region of the side walls , not shown , about an axle 74 running horizontally and transversely to the forward direction and bears , in an end region 76 facing away from the axle 74 , two of the movable rollers 46 , 48 and cleaning rollers 46 a , 48 a associated with these rollers 46 , 48 . the tensioning arm 72 is mounted correspondingly about an axle 78 and bears one of the movable rollers 44 in an end region 80 . in addition , the tensioning arm 68 is operatively connected at one end to the tensioning element 70 and at the other end to the baler or the frame 12 thereof , in a manner not shown . the pressing means 34 is pressed by the tensioning arm 70 sufficiently firmly against the rotationally driven stationary roller 38 that the pressing means is driven . the roller 36 is also driven rotationally . the pressing means 34 assumes an initial position , in which it spans , stretched in a straight line , the inlet 24 , and a final position , in which it wraps around the bale like a large loop . the baling chamber 26 is therefore variable in size , i . e . its diameter increases with the size of the bale 18 . the bale is located during formation thereof in the baling chamber 26 and is largely wrapped by the pressing means 34 , but falls out of the baling chamber 26 to the rear onto the ground 16 as soon as the carrier 60 is pivoted upward by the movable rollers 50 - 56 , counterclockwise as viewed in the drawing . alternatively , the bale can also be deposited onto a device downstream of the baler 10 in the form of a device for wrapping the bale with a net or film of material . the embodiment of the baler shown here is disclosed in detail in ep 1 308 078 a1 . other possible embodiments are described in de 198 51 470 a1 , de 102 41 215 a1 and ep 1 264 531 a1 . the disclosures of these documents are incorporated by reference into the present documents . in a region 82 of the baler 10 that faces the drawbar 20 , a stripper device 84 is provided in order to be able to scrape off or strip off deposits or adhesions on the pressing means 34 or the outer side 34 a thereof , such as in the form of wet or moist crop such as grass , dirt or other material , for example , from the pressing means 34 or the outer region 34 a thereof . the stripper device 84 has a scraping bar carrier 86 and a scraping bar 88 . the scraping bar carrier 86 is pivotably connected via a joint 90 to a frame region 12 a of the baler 10 at one and , at the other end bears the scraping bar 88 , consisting , according to the present embodiment , of a flexible plastic material , which can be formed in the manner of a hard rubber strip or lip , for example . the reader is now referred to fig2 a and 2 b , in which the stripper device 84 is shown in further detail . the scraping bar carrier 86 is pivotably connected , together with an articulated lever 92 , to a region 12 a of the frame 12 via the joint 90 . the articulated lever 92 is in turn connected via a connecting element 94 and a connecting means 98 having a spring means 96 to a tensioning arm lever 100 , which is mounted pivotably with the tensioning arm 72 about the same axle 78 in such a manner that it can also pivot jointly with the tensioning arm . the mode of operation of the stripper device 84 will be dealt with in detail below . reference is made for this purpose to fig1 and fig2 a and 2 b . during the bale - forming process , the tensioning arm 72 assumes the position shown in fig2 a , pivoted downward and to the right relative to the baling chamber 12 . after termination of the bale - forming process and a possible subsequent tying or wrapping with net or film material , a delta - shaped carrier 60 is pivoted backward and upward . the rollers 50 and 56 provided on the carrier 60 drive the pressing means 34 into exactly the same position , whereby the bale , previously surrounded in the baling chamber 26 by the pressing means 34 , is discharged from the baling chamber 26 by the pressing means 34 and deposited on the ground 16 or on a connected device such as a device for wrapping the bale with a net or film material . if the delta - shaped carrier 60 , and thus the rollers 50 , 56 mounted thereon and the pressing means 34 , pivot backward and upward , then the tensioning lever 68 begins to move back in the direction of its lower position shown in fig1 . the tension of the pressing means 34 is briefly maintained by an upward movement of the tensioning arm 72 . any slippage that may occur can thus be absorbed and / or prevented . the tensioning arm 72 pivots briefly upward about the axle 78 , whereby the pivot arm lever 100 pivots downward . this downward - directed movement is transmitted via the connecting means 98 to the articulated lever 92 , which brings the scraping bar carrier 86 , and thus the scraping bar 88 , downward , shown in fig2 b , into the withdrawn position or , in other words , into the position remote from the pressing means 34 or the outer area 34 a of the pressing means 34 . in this position , the deposited material that may have been removed by the stripper device 84 or the scraping bar carrier 86 and / or the scraping bar 88 can fall downward . then the tensioning arm 72 pivots back , due to the action of the tensioning means 70 , into its position shown in fig2 a , in which it adjoins the outer region 34 a of the pressing means 34 . the spring means 96 can ensure in this position that the scraping bar 88 uniformly contacts the outer region 34 a of the pressing means 34 and / or can allow escape of the scraping bar 88 , the scraping bar carrier 86 and the articulated lever 92 in case of an overload produced in this area by a stone , highly compacted deposits or the like , for example . damage to the stripper device 84 can be prevented in this manner and / or optimal function can be achieved .