Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
229 words
A press with extended nip for paper or board machines, prising a support means (2) acting as a counter member; a pressure means (4) disposed opposite the support means (2) and comprising a press shoe (5) and a carrying element (41) carrying the press shoe (5) and designed to be secured to a stand (9), said press shoe (5), together with the support means (2), forming a pressing zone with extended nip; at least one endless movable belt (3), impervious to liquid, being arranged to pass through said pressing zone in sliding contact with the press shoe (5); and at least one endless, liquid-absorbing felt (6), arranged to pass through said pressing zone together with a fiber web (1) to be dewatered, said pressure means (4) comprising a plurality of jacks (14) disposed in at least one row across the belt (3) and having piston rods (21) acting on the press shoe (5) to force it against the support means (2), characterized in that the press shoe (5) is freely supported by the piston rods (21) without rigid mechanical connection therebetween, and that the pressure means (4) is provided with a support bearing (34) disposed downstream of the press shoe (5) to absorb horizontal forces acting on the press shoe (5) during operation, said support bearing comprising a stationary support element (35, 37) mounted on the carrying element (41
Claim 2
Dependent Claim
229 words
A press with extended nip for paper or board machines, prising a support means (2) acting as a counter member; a pressure means (4) disposed opposite the support means (2) and comprising a press shoe (5) and a carrying element (41) carrying the press shoe (5) and designed to be secured to a stand (9), said press shoe (5), together with the support means (2), forming a pressing zone with extended nip; at least one endless movable belt (3), impervious to liquid, being arranged to pass through said pressing zone in sliding contact with the press shoe (5); and at least one endless, liquid-absorbing felt (6), arranged to pass through said pressing zone together with a fiber web (1) to be dewatered, said pressure means (4) comprising a plurality of jacks (14) disposed in at least one row across the belt (3) and having piston rods (21) acting on the press shoe (5) to force it against the support means (2), characterized in that the press shoe (5) is freely supported by the piston rods (21) without rigid mechanical connection therebetween, and that the pressure means (4) is provided with a support bearing (34) disposed downstream of the press shoe (5) to absorb horizontal forces acting on the press shoe (5) during operation, said support bearing comprising a stationary support element (35, 37) mounted on the carrying element (41
Claim 3
Dependent Claim
18 words
A press as claimed in claim 1, characterized in that the support bearing (34) includes rolling bodies (36).
Claim 4
Dependent Claim
36 words
A press as claimed in claim 2, characterized in that the rolling bodies (36) are rotatably journalled between and in contact with the press shoe (5) and a support surface of the stationary support element (35).
Claim 5
Dependent Claim
48 words
A press as claimed in claim 1, characterized in that the support bearing (34) comprises one or more projections (38) extending from the stationary support element (37), said projections having convex support surfaces (39) arranged to abut opposing support and sliding surfaces (40) of the press shoe (5).
Claim 6
Dependent Claim
120 words
A press as claimed in claim 1, characterized in that the pressure means (5) comprises a plurality of hydrostatic pressure pockets (25) disposed in at least one row, the bottom (28) of each pressure pocket (25) being located in the carrying element (41) and communicating with a channel (31) via narrow holes (32) in the carrying element (41) for the supply of pressure fluid to the pressure pockets (25), and that the transition between the carrying element (41) and the press shoe (5) at each pressure pocket (25) is formed by a sleeve (29), said sleeves (29) being so disposed in the pressure pockets (25) that the press shoe (5) can be moved in relation to the carrying element (41).
Claim 7
Dependent Claim
76 words
A press as claimed in claim 5, characterized in that the sleeve (29) is provided externally with resilient seals (30) sealing against the opposite aperture walls of the pressure pockets (25), and that the sleeves (29) are fitted with a small clearance to said aperture walls to that the press shoe (5) in this way and by the resilience of the seals is allowed a limited inclination by the action of a row of jacks (14).
Claim 8
Dependent Claim
19 words
A press as claimed in claim 6, characterized in that the sleeves (29) are disposed along a straight line.
Claim 9
Dependent Claim
28 words
A press as claimed in any of claims 1 to 7, charactterized in that the support means acting as counter member consists of a rotating counter roll (2).