US4157724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and an apparatus for distributing a disintegrated material onto a layer forming surface
Assignee: Scan-Web I/S
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Filing: 1977-12-19
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Granted: 1979-06-12
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Expires: 1997-12-19
Abstract
Abstract A method and an apparatus for distributing loose fibers or particles onto a moving web in an even layer thereon preparatory to production of a non-woven sheet of the fiber or particle material. The material is filled into a container having a generally V-shaped screen bottom extending crosswise over the moving web, and whipping members are rotated in the bottom space so as to whip the material adjacent the interior surface of the screen by a whipping movement causing the fibers or particles to be slung against the screen and the material to move in a flow lengthwise along the bottom surfaces, whereby when suction is applied to the outside of the screen bottom through the web the fibers or particles will get dispensed through the screen and deposited on the web. The combined whipping and slinging of the material contributes to a high capacity of the distribution.
Inventors
- 👤 Torsten B. Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:33
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; B; B65; B65B; B65B1/00; B65B1/04; B65B1/10; B65B1/14; B65B1/16; D21H27/42
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
157 words
Apparatus for depositing and distributing loose fibres or particles onto a surface of a moving carrier web comprising: (a) a housing having inlet and outlet ends; (b) a moving carrier web having a surface positioned adjacent the outlet end of said housing; (c) screen means within said housing between said inlet and outlet ends, at least part of said screen means being arranged so as to extend in a manner which is transverse and non-parallel with respect to the surface of the moving carrier web; (d) agitator means within said housing for creating a flow of said particles or fibres about an axis extending between said inlet and outlet ends, and for directing said particles or fibres outwardly against and through said screen means; and (e) means for directing particles or fibres passing through said screen means to said moving carrier web whereby said particles or fibres are deposited in a layer upon said moving carrier web.
Claim 2
Dependent Claim
157 words
Apparatus for depositing and distributing loose fibres or particles onto a surface of a moving carrier web comprising: (a) a housing having inlet and outlet ends; (b) a moving carrier web having a surface positioned adjacent the outlet end of said housing; (c) screen means within said housing between said inlet and outlet ends, at least part of said screen means being arranged so as to extend in a manner which is transverse and non-parallel with respect to the surface of the moving carrier web; (d) agitator means within said housing for creating a flow of said particles or fibres about an axis extending between said inlet and outlet ends, and for directing said particles or fibres outwardly against and through said screen means; and (e) means for directing particles or fibres passing through said screen means to said moving carrier web whereby said particles or fibres are deposited in a layer upon said moving carrier web.
Claim 3
Dependent Claim
54 words
Apparatus according to claim 1, wherein said agitator means includes a plurality of agitating members, said agitating members being positioned in spaced areas along the screen means for causing said material to move in a flow, relatively slowly, with respect to the speed of the agitating members, from one area to an adjacent area.
Claim 4
Dependent Claim
54 words
An apparatus according to claim 2, in which the housing is elongated crosswise of said moving carrier web and is provided with one row of said agitating members, the part of the screen means which extend transversely and non-parallel with respect to the moving carrier web being located at both sides of said row.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 2, characterized in that the whipping is effected by whip members which are rotated in a plane of rotation which intersects said part of the screen means which is transverse and non-parallel to the carrier web.
Claim 6
Dependent Claim
73 words
An apparatus according to claim 4, wherein the agitating members are mounted in a stationary row along the screen means and are provided with thin whip elements, the outermost portions of which pass closely along portions of the transversely and non-parallel extending part of said screen means and move in a plane of rotation which is non-parallel to the respective screen portions, all whip members being rotated in a uniform direction of rotation.
Claim 7
Dependent Claim
49 words
An apparatus according to claim 5, in which the whip elements project radially from shafts of the agitating members and in which at least some of the whip members of two adjacent agitators are axially offset from each other and mounted so as to rotate in overlapping circular paths.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 5, in which the whip elements are constituted by radially projecting rods of flat cross section.
Claim 9
Dependent Claim
26 words
An apparatus according to claim 7, in which the rods have opposed surfaces which taper towards each other at least adjacent leading edges of the rods.
Claim 10
Dependent Claim
40 words
Apparatus according to claim 1, characterized in that said agitating members are rotary whip members which are rotated in a plane of rotation which intersects said part of the screen means which is transverse and non-parallel to the carrier web.
Claim 11
Dependent Claim
56 words
Apparatus according to claim 9, wherein said agitating members have plural whipping elements which whip said fibres or particles, as they rotate about a respective axis, in a manner causing disturbance of the fibres or particles without to any substantial degree causing the material to move with the whipping elements about their respective axis of rotation.
Claim 12
Dependent Claim
51 words
An apparatus according to claim 1, wherein said screen means is provided with a bottom having a lower flat portion located above and parallel with the moving carrier web and outer inclined side portions, and wherein the agitator means includes whip members arranged so as to form a correspondingly frusto-conical pattern.
Claim 13
Dependent Claim
42 words
An apparatus according to claim 1, in which the housing includes wall portions arranged so as to confine a space between said part of the screen means and the moving carrier web, said space communicating with air intake means for external air.
Claim 14
Dependent Claim
48 words
Apparatus according to claim 1, wherein said agitator means comprises a plurality of whip members spaced radially and axially along a rotatable shaft, said whip members being positioned within said container so as to enable all of said whip members to pass in close proximity to said screen.
Claim 15
Dependent Claim
40 words
Apparatus according to claim 1, wherein said means for directing comprises a wall member of said housing arranged about said screen means so as to form a space communicating an air intake with said carrier web externally of said screen.
Claim 16
Dependent Claim
24 words
Apparatus according to claim 1, wherein said means for directing comprises suction means for drawing the fibre or particle material through said screen means.
Claim 17
Dependent Claim
39 words
Apparatus according to claim 15, wherein said moving carrier web is foraminous and said suction means includes a suction box disposed on a side of said moving carrier web which is opposite from the surface adjacent said housing outlet.
Claim 18
Independent Claim
152 words
A method for depositing and distributing loose fibre or particle material onto a surface of a moving carrier web comprising the steps of: (a) feeding the loose fibre or particle material into a housing having inlet and outlet ends, the outlet end being positioned adjacent a surface of a moving carrier web; (b) agitating said material within said housing by creating a flow of said material about an axis extending between the inlet and outlet ends of the housing and directing said material outwardly against a screen means which is located in said housing and at least in part extends in a manner which is transverse and non-parallel to said surface of the moving carrier web and through said screen means; and (c) directing material passing through the screen means to said moveable carrier web so that said material is deposited in a layer upon the surface of the moving carrier web.
Claim 19
Independent Claim
152 words
A method for depositing and distributing loose fibre or particle material onto a surface of a moving carrier web comprising the steps of: (a) feeding the loose fibre or particle material into a housing having inlet and outlet ends, the outlet end being positioned adjacent a surface of a moving carrier web; (b) agitating said material within said housing by creating a flow of said material about an axis extending between the inlet and outlet ends of the housing and directing said material outwardly against a screen means which is located in said housing and at least in part extends in a manner which is transverse and non-parallel to said surface of the moving carrier web and through said screen means; and (c) directing material passing through the screen means to said moveable carrier web so that said material is deposited in a layer upon the surface of the moving carrier web.
Claim 20
Dependent Claim
57 words
A method according to claim 17, wherein the step of agitating is performed by a plurality of rotary agitating members positioned along spaced areas of the screen means and wherein the material is caused to move in a flow, relatively slowly in comparison to the speed of the agitating members from one area to an adjacent area.
Claim 21
Dependent Claim
41 words
A method according to claim 18, wherein the step of agitating is performed by causing a disturbance of the material without to any substantial degree causing the material to move with the rotary agitating members about their respective axis of rotation.
Claim 22
Dependent Claim
21 words
A method according to claim 18, wherein the material is directed through the screen means at least in part by suction.
Claim 23
Dependent Claim
43 words
A method according to claim 20, wherein the step of directing the fibre of particle material through said screen means by suction is performed by a suction box disposed beneath said carrier web drawing air through said housing, screen means, and carrier web.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |