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[[Image:AllisChalmers_Rotobaler.jpg|right|200px|Allis Chalmers Rotobaler]] | [[Image:AllisChalmers_Rotobaler.jpg|right|200px|Allis Chalmers Rotobaler]] | ||
[[Image:Rundballenpresse.gif|left|thumb|Round baler dumping a fresh bale]] | [[Image:Rundballenpresse.gif|left|thumb|Round baler dumping a fresh bale]] | ||
The common type of baler in industrialized countries is the large round baler. It produces cylinder-shaped "round" or "rolled" bales. Grass is rolled up inside the baler using rubberized belts, fixed rollers, or a combination of the two. When the bale reaches a predetermined size, either netting or twine is wrapped around it to hold its shape. The back of the baler swings open, and the bale is discharged. The bales are complete at this stage, but they may also be [[Wrapping Machines|wrapped]] in plastic sheeting by a bale wrapper, either to keep hay dry when stored outside or convert damp grass into | The common type of baler in industrialized countries is the large round baler. It produces cylinder-shaped "round" or "rolled" bales. Grass is rolled up inside the baler using rubberized belts, fixed rollers, or a combination of the two. When the bale reaches a predetermined size, either netting or twine is wrapped around it to hold its shape. The back of the baler swings open, and the bale is discharged. The bales are complete at this stage, but they may also be [[Wrapping Machines|wrapped]] in plastic sheeting by a bale wrapper, either to keep hay dry when stored outside or convert damp grass into silage. Variable-chamber balers typically produce bales from 48in diameter and up to 60in width. The bales can weigh anywhere from 2200kg, depending upon size, material, and moisture content. | ||
Originally conceived by Ummo Luebbens circa,1910, the first round baler did not see production until 1947, when Allis-Chalmers introduced the Roto-Baler. Marketed for the water-shedding and light weight properties of its hay bales, AC had sold nearly 70,000 units by the end of production in 1960.<ref>ref name="Allis-Chalmers Innovation">Rotobaler, [http://www.toytractorshow.com/ac_inovation.htm]" (accessed on January 7, 2010)</ref> | Originally conceived by Ummo Luebbens circa,1910, the first round baler did not see production until 1947, when Allis-Chalmers introduced the Roto-Baler. Marketed for the water-shedding and light weight properties of its hay bales, AC had sold nearly 70,000 units by the end of production in 1960.<ref>ref name="Allis-Chalmers Innovation">Rotobaler, [http://www.toytractorshow.com/ac_inovation.htm]" (accessed on January 7, 2010)</ref> | ||
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The next major innovation came in 1972, when the Vermeer Company began selling its model 605 - the first modern round baler. Previously, round hay bales had been little more than lumps of grass tied together, but the Vermeer design used belts to compact hay into a cylindrical shape as is seen today. | The next major innovation came in 1972, when the Vermeer Company began selling its model 605 - the first modern round baler. Previously, round hay bales had been little more than lumps of grass tied together, but the Vermeer design used belts to compact hay into a cylindrical shape as is seen today. In the early 1980s, collaboration between Walterscheid and Vermeer produced the first effective uses of CV joints in balers, and later in other farm machinery. Due to the heavy torque required for such equipment, double Cardan joints are primarily used. Former Walterscheid engineer Martin Brown is credited with "inventing" this use for universal joints. | ||
==Round bale handling and transport== | ==Round bale handling and transport== |
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