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US 6,294,052 B1Granted
Efficient press section for paper manufacturing
OwnerJose J. Garcia B.inventor
Life of this patent
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Abstract
Embodiments of a new press section for paper manufacturing are disclosed, each having a combination of rolls which form at least two press nips, with one roll of each combination being common to two press nips. Also, said embodiments further include two continuous-loop belts, one made of absorbent felt material, the other of plastic sheet, both disposed in a manner to enhance the evacuation of water from a web of wet paper fiber.
Claims2
A paper making press section, comprising:
- (a) a conveying means for transporting a web of wet paper fiber, the conveying means comprising a first belt having moisture absorbent material, the first belt forming a continuous loop;
- (b) a first and a second press nip assembly, each press nip assembly comprising at least three cooperating, cylindrical press rolls disposed in parallel along a common plane, the first and the second press nip assemblies disposed substantially in parallel:
- each of said rolls having an outer surface and a lengthwise axis, each of said rolls rotatable about said axis;
- said rolls further disposed in close proximity, forming a first and a second press nip;
- said press nips comprising a compression point between the outer surfaces of two of said rolls, wherethrough said first belt is directed;
- within each press nip assembly, at least one roll being common to the first and second press nips;
- said outer surfaces selected from a group consisting of:
- a smooth surface, a perforated surface, a blinddrilled surface, and a surface having depressions;
- (c) an ingress;
- (d) an egress;
- and
- (e) a second belt
- the second belt being movable, disposed to travel through the first and second press assemblies;
- the second belt cooperating with said conveying means as the second belt travels through said press assemblies;
- the second belt comprising non-water absorbent plastic sheet;
- said first and second press nip assemblies disposed between said ingress and said egress;
- whereby said web is layered between the second belt and said first belt as the second belt travels through said press nips, and whereby said conveying means receives said web at said ingress, continuously transports the web first through the first press nips of the first and second press assemblies, then through the second press nips of the first and second press assemblies, and then separates from the web at said egress.
14 more elements
Dependencies are inferred from the claim text.