US 7,480,995 B2
Methods for producing a corrugating roller for machines to produce corrugated cardboard
Mauro Adami, Lucca (Italy); and Desiderio Garcia, Pamplona Navarra (Spain)
Assigned to Fosber S.p.A., Lucca (Italy)
Filed on Jun. 27, 2007, as Appl. No. 11/769,258.
Application 11/769258 is a division of application No. 10/860500, filed on Jun. 03, 2004, abandoned.
Claims priority of application No. FI2003A0159 (IT), filed on Jun. 04, 2003.
Prior Publication US 2007/0248712 A1, Oct. 25, 2007
Int. Cl. B21K 1/02 (2006.01); B31F 1/07 (2006.01)
U.S. Cl. 29—895  [492/20; 492/46] 21 Claims
OG exemplary drawing
 
1. A method for producing a corrugating roller for machines to produce corrugated cardboard, the method comprising:
providing a single block of material;
machining a pair of necks and a central axial cavity from said single block of material;
drilling said single block of material at a first location to form a first longitudinal duct, said first longitudinal duct extending from one end of said single block of material to another end of said single block of material;
drilling said single block of material at a second location of said single block to form a second longitudinal duct, said second longitudinal duct extending from said one end of said single block of material to said another end of said single block of material;
repeating said machining step until said single block of material forms a hollow cylindrical body with an outer surface comprising a plurality of longitudinally extending corrugations, said longitudinal ducts forming a circuit for a heat-carrying fluid, wherein at least one of said pair of necks is supplied with said heat-carrying fluid, said central axial cavity extending within said hollow cylindrical body;
machining said hollow cylindrical body to form a first radial duct located in area of one end of said first longitudinal duct and a second radial duct located in an area of another end of said first longitudinal duct;
machining said hollow cylindrical body to form a third radial duct located in an area of one end of said second longitudinal duct and a fourth radial duct located in an area of another end of said second longitudinal duct; and
closing one end of each of said radial ducts at an area adjacent to said corrugations and each end of each of said longitudinal ducts with a closing cap.