EP0400581A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for the consolidation of non woven fibrous structure and machinery to implement the process
Assignee: Individual
•
Filing: 1990-05-29
•
Granted: —
•
Expires: 2010-05-29
Abstract
Abstract A process for the consolidation of fibrous non woven structure, characterised in that, after having placed the fibrous structure to be consolidated on a pierced surface conveyor, its superior face is run over by blown air jets and, at the same time, undergoes a suction through said pierced conveyor, the blowing pressure and the suction depressure being settled so that the loss of head caused by the web, together with the supporting conveyor, causes a sensible expansion of the air flow pipe, near to the web itself.
Inventors
- 👤 Claudio Governale
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 10:12
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
86 words
Process for the consolidation of fibrous non woven structure, characterised in that, after having placed the fibrous structure to be consolidated on a pierced surface conveyor, its superior face is run over by blown air jets and, at the same time, undergoes a suction through said pierced conveyor, the blowing pressure and the suction depressure being settled so that the loss of head caused by the web, together with the supporting conveyor, causes a sensible expansion of the air flow pipe, near to the web itself.
Claim 2
Dependent Claim
86 words
Process for the consolidation of fibrous non woven structure, characterised in that, after having placed the fibrous structure to be consolidated on a pierced surface conveyor, its superior face is run over by blown air jets and, at the same time, undergoes a suction through said pierced conveyor, the blowing pressure and the suction depressure being settled so that the loss of head caused by the web, together with the supporting conveyor, causes a sensible expansion of the air flow pipe, near to the web itself.
Claim 3
Dependent Claim
41 words
Process for the consolidation of fibrous structure according to claim 1, characterised in that the fibrous structure to be consolidated is run over by hot air jets that open and at same time weld among them the fibers of said structure.
Claim 4
Dependent Claim
39 words
Process according to claim 1 characterised in that the fibrous structure to be consolidated is at first run over by cold air jets that open the fibers and later by hot air jets welding them by softening or melting.
Claim 5
Dependent Claim
125 words
Machinery to implement the process according to claims 1-3, characterised by comprising: - two pierced conveyors (12,1) running, at least for a short portion, facing each other and working with similar peripherical speed to let the structure to be consolidated go on. - a compressor (23) placed on the same side of the conveyor (12), opposite to the structure to be consolidated, said compressor (23) being able to generate various air jets, which pass through both two conveyors (12,1) and the structure. - a suction pump (11) placed opposite to the other conveyor (1) opposite to the structure and provided with an air jet conveyor (5) in the suction pipe (9), the pressure of said pump (11) being less than that of the air compressor.
Claim 6
Dependent Claim
45 words
Machinery according to claim 4 characterised in that the conveyor (12) placed opposite to compressor (23) is pierced so that the distribution of holes corresponds to that to be obtained in the cohesioning structure, while the other conveyor (1) presents a more strictly pierced net.
Claim 7
Dependent Claim
17 words
Machinery according to claim 4, characterised in that one of the conveyor (12) is a pierced cylinder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.