Patent ID: 7841552

Claim:
A two-roll machine for the pressure treatment of granular material, having two rolls which are rotatably mounted in bearing housings, driven in opposite directions and separated from each other by a roll gap, one of which is formed as a loose roll whose bearing housings are supported on machine frame side parts by hydraulic cylinders applying a roll pressing force, while the other is formed as a fixed roll whose bearing housings are supported on frame end pieces, and all of the bearing housings being mounted with their undersides and upper sides on sliding tracks of two lower-flange and two upper-flange machine brackets, comprising: an additional frame in the form of a lower frame at a front end of the roller press adjacent to the fixed roll, the lower frame lengthening the two lower-flange machine brackets and a transverse frame connected to the two upper-flange machine brackets, the transverse frame having a clear opening width which permits the rolls to be pushed through the transverse frame onto the lower frame, the frame end pieces supporting the fixed roll during roller press operation releasably connected to the lower-flange machine brackets and upper-flange machine brackets, an upper crossmember of the transverse frame supporting the open ends of the two bracket upper flanges, and a pulling apparatus arranged to pull the two rolls, together with bearing housings, successively out of the roller press to one side onto the lower frame of the additional frame after the machine frame end pieces have been released and, to pull the two rolls, together with bearing housings, into the roller press from the additional frame.