초록 ▼

A pressing machine includes a roller and a pressing shoe which can be moved towards and away from the roller to exert pressure on the roller or on a material in a gap between the shoe and the roller. The shoe is mounted in a pressure chamber to which hydraulic pressure medium can be supplied to move

A pressing machine includes a roller and a pressing shoe which can be moved towards and away from the roller to exert pressure on the roller or on a material in a gap between the shoe and the roller. The shoe is mounted in a pressure chamber to which hydraulic pressure medium can be supplied to move the shoe. Upon movement towards the roller, the shoe applies pressure over a zone extending for a part of the circumference of the roller. Means is mounted on the pressing shoe for altering the length of this zone in the circumferential direction of the roller. To this end, the shoe may have two movable jaws which establish said zone, the jaws being movable by adjusting means over a cylindrical surface of said shoe which has substantially the same centre of curvature as the roller. The pressing shoe is particularly advantageous in a paper machine for dewatering a web of paper or for supporting the rollers of a rolling apparatus.

대표청구항 ▼

In a pressing machine including a roller, pressing shoe means presenting to said roller a substantially concave surface structured to form a pressing zone extending along a part of the circumference of said roller in order to define between said pressing shoe means and said roller a pressing gap to

In a pressing machine including a roller, pressing shoe means presenting to said roller a substantially concave surface structured to form a pressing zone extending along a part of the circumference of said roller in order to define between said pressing shoe means and said roller a pressing gap to which pressure can be applied, said pressing shoe means comprising means defining at least one pressure chamber, means for connecting said pressure chamber to a source of hydraulic pressure medium, said pressing shoe means including a pressing shoe mounted in said pressure chamber and defining an adjustable circumferential length determining the length of said pressing zone along said part of the circumference of said roller, said pressing shoe in its operative position being arranged to be urged by said hydraulic pressure medium towards and away from said roller to apply pressure to said roller over said pressing zone extending along said part of the circumference of said roller, and adjusting means mounted on said pressing shoe for adjusting said adjustable circumferential length of said pressing shoe in said operative position thereof and thereby the length of said pressing zone determined by said pressing shoe in the circumferential direction of said roller. In a pressing machine including a roller, pressing shoe means presenting to said roller a substantially concave surface structured to form a pressing zone extending along a part of the circumference of said roller in order to define between said pressing shoe means and said roller a pressing gap to which pressure can be applied, said pressing shoe means comprising means defining a plurality of pressure chambers, a pressing shoe, base parts of said pressing shoe, each such part being mounted in a respective pressure chamber, means connecting each said pressure chamber to a source of hydraulic pressure medium, whereby said pressing shoe can be urged towards and away from said roller, at least two jaws mounted in said pressing shoe and movable in the circumferential direction of said roller to establish said pressing zone extending along said part of the circumference of said roller and via which pressing zone pressure can be applied to said roller upon movement of said pressing shoe towards said roller, and means for moving at least one of said jaws to alter the length of said pressing zone formed by said pressing shoe means in the circumferential direction of said roller.