Patent US2968210A successfully refreshed from Google Patents.
US5111552A
Expired / Lapsed
US
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Method and device for manufacturing a mineral wool web
Assignee: Partek Oy AB
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Filing: 1987-04-24
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Granted: 1992-05-12
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Expires: 2007-04-24
Abstract
Abstract The invention relates to a method and a device for producing a mineral wool web from a thin primary web formed on a movable collecting surface (6). According to prior known methods, the primary web is folded on a receiving conveyor (18) in an overlapping configuration so that the desired thickness of web is achieved. It is also known to combine two or several primary webs and to form the final mineral wool web by folding. The problem when producing mineral wool webs is the high rate of production of the primary webs and consequently, the high requirements on the devices in the further process and a great loss of material because of uneven edges which have to be cut down. According to the invention, the primary web is split into separate sheets before the deposit on the receiving conveyor (18), and the sheets are deposited by an oscillating distributing conveyor (16) in an overlapping configuration on the receiving conveyor, or, in case sheets are being produced, stacked on top of each other. The method offers several possibilities of reducing the feeding rate of the sheets and thus facilitating the deposit on the receiving conveyor. The flow of split sheets may for instance be separated (11, 12) into two or several flows to an intermediate conveyor each (14, 15) and the sheets may be stacked before the deposit. The cutting of the primary web may be performed on the collecting surface (6) or optionally after this on an intermediate conveyor.
Inventors
- 👤 Henning J. E. Lauren
- 👤 Tom E. E. Nurmi
- 👤 Tapio O. Moisala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:13
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D01; D01G; D01G25/00; D04H1/4218; D04H1/4226; D04H1/70; D04H1/72; D04H1/732; D04H1/736; D04H1/74; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T156/12; Y10T156/13; Y10T156/17; Y10T156/1702; Y10T156/1744
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
91 words
A method for forming a mineral wool web from several layers of a primary web comprising the steps of: depositing fibers on a collecting surface to form the primary web; splitting the primary web into separate sheets; feeding the separate sheets along at least two paths to a receiving conveyor; and depositing the separate sheets on the receiving conveyor in an overlapping manner, wherein a rate of flow of deposit of each separate path of sheets onto the receiving conveyor is less than a rate of motion of the collecting surface.
Claim 2
Independent Claim
91 words
A method for forming a mineral wool web from several layers of a primary web comprising the steps of: depositing fibers on a collecting surface to form the primary web; splitting the primary web into separate sheets; feeding the separate sheets along at least two paths to a receiving conveyor; and depositing the separate sheets on the receiving conveyor in an overlapping manner, wherein a rate of flow of deposit of each separate path of sheets onto the receiving conveyor is less than a rate of motion of the collecting surface.
Claim 3
Dependent Claim
26 words
A method as in claim 1, wherein the depositing step comprises the step of depositing the separate sheets continuously to form a continuous mineral wool web.
Claim 4
Dependent Claim
24 words
A method as in claim 1, wherein the splitting step comprises a step of splitting the primary web before it leaves a collecting conveyor.
Claim 5
Dependent Claim
24 words
A method as in claim 1, wherein the splitting step comprises a step of splitting the primary web after it leaves a collecting conveyor.
Claim 6
Dependent Claim
30 words
A method as in claim 3, further including a step of forming fracture indications in the primary web by preventing a deposit of web forming fibres at selected splitting locations.
Claim 7
Dependent Claim
30 words
A method as in claim 4, further including a step of forming fracture indications in the primary web by preventing a deposit of web forming fibres at selected splitting locations.
Claim 8
Dependent Claim
23 words
A method as in claim 1, further including a step of separating the split sheets from a collecting conveyor with a forced gas.
Claim 9
Dependent Claim
23 words
A method as in claim 3, further including a step of separating the split sheets from the collecting conveyor with a forced gas.
Claim 10
Dependent Claim
33 words
A method as in claim 1, further including a step of transferring the separated sheets to at least one intermediate conveyor which transfers the sheets from a separation point to the receiving conveyor.
Claim 11
Dependent Claim
33 words
A method as in claim 1, further including a step of transferring the separated sheets to at least one intermediate conveyor which transfers the sheets from a separation point to the receiving conveyor.
Claim 12
Dependent Claim
37 words
A method as in claim 9, further including a step of lifting some of the sheets from the intermediate conveyor and lowering them back onto other sheets then positioned on the intermediate conveyor to stack the sheets.
Claim 13
Dependent Claim
37 words
A method as in claim 10, further including a step of lifting some of the sheets from the intermediate conveyor and lowering them back onto other sheets then positioned on the intermediate conveyor to stack the sheets.
Claim 14
Dependent Claim
23 words
A method as in claim 11, further including a step of depositing the stacked sheets on the receiving conveyor as a single sheet.
Claim 15
Dependent Claim
23 words
A method as in claim 12, further including a step of depositing the stacked sheets on the receiving conveyor as a single sheet.
Claim 16
Dependent Claim
26 words
A method as in claim 1, wherein the splitting step comprises a step of splitting the primary web against a countersurface with at least one blade.
Claim 17
Dependent Claim
34 words
A method as in claim 15, wherein the splitting step comprises a step of splitting the primary web against a countersurface by engaging the blade with at lest one inset channel in the countersurface.
Claim 18
Dependent Claim
29 words
A method as in claim 3, wherein the splitting step comprises a step of splitting the primary web along parallel lines perpendicular to the edges of the primary web.
Claim 19
Dependent Claim
29 words
A method as in claim 4, wherein the splitting step comprises a step of splitting the primary web along parallel lines perpendicular to the edges of the primary web.
Claim 20
Dependent Claim
25 words
A method as in claim 1, wherein the depositing step comprises a step of depositing the sheets on the receiving conveyor in their flow direction.
Claim 21
Dependent Claim
30 words
A method as in claim 1, further including a step of carrying away the sheets deposited on the receiving conveyor at a right angle to the oncoming flow of sheets.
Claim 22
Dependent Claim
23 words
A method as in claim 1, further including a step of turning some of the sheets before depositing them on the receiving conveyor.
Claim 23
Dependent Claim
15 words
A method as in claim 1, further including a step of turning every second sheet.
Claim 24
Dependent Claim
20 words
A method as in claim 21, wherein the turning step comprises a step of turning some of the sheets 90°.
Claim 25
Dependent Claim
23 words
A method as in claim 1, further including a step of inserting additional sheets of different compositions into the main flow of sheets.
Claim 26
Independent Claim
104 words
A device for manufacturing a mineral wool web comprising: a collecting surface; means for depositing fibers on said collecting surface to form a primary web; a device for splitting the primary web into sheets; transfer means for conveying the sheets along at least two paths to a receiving conveyor and depositing the sheets from the separate paths in an overlapping condition onto the receiving conveyor for forming a continuous mineral wool web of a desired thickness, wherein a rate of flow of deposit of each separate path of sheets onto the receiving conveyor is less than a rate of motion of the collecting surface.
Claim 27
Independent Claim
104 words
A device for manufacturing a mineral wool web comprising: a collecting surface; means for depositing fibers on said collecting surface to form a primary web; a device for splitting the primary web into sheets; transfer means for conveying the sheets along at least two paths to a receiving conveyor and depositing the sheets from the separate paths in an overlapping condition onto the receiving conveyor for forming a continuous mineral wool web of a desired thickness, wherein a rate of flow of deposit of each separate path of sheets onto the receiving conveyor is less than a rate of motion of the collecting surface.
Claim 28
Dependent Claim
38 words
A device as in claim 25, wherein the transfer means comprises at least one intermediate conveyor arranged between a collecting conveyor and the receiving conveyor for guiding the split sheets from the collecting conveyor to the receiving conveyor.
Claim 29
Dependent Claim
40 words
A device as in claim 25, wherein the splitting device comprises at least one cutter attached to a rotary roller, the cutter engaging a surface of a collecting conveyor and having a periphery length equal to a required sheet length.
Claim 30
Dependent Claim
28 words
A device as in claim 27, wherein the splitting device comprises several cutters which are evenly distributed over the roller periphery in accordance with a required sheet length.
Claim 31
Dependent Claim
21 words
A device as in claim 27, wherein the roller comprises internally mounted suction means for attaching the sheets to the roller.
Claim 32
Dependent Claim
19 words
A device as in claim 27, wherein countersurfaces for at least one cutter are provided on a collecting conveyor.
Claim 33
Dependent Claim
16 words
A device as in claim 30, wherein the countersurfaces comprise inset channels for engaging the cutter.
Claim 34
Dependent Claim
17 words
A device as in claim 27, wherein the cutter engages an inset channel on a cutting countersurface.
Claim 35
Dependent Claim
17 words
A device as in claim 28, wherein each cutter engages an inset channel on a cutting countersurface.
Claim 36
Dependent Claim
18 words
A device as in claim 27, further comprising means for separating the primary web from a collecting conveyor.
Claim 37
Dependent Claim
17 words
A device as in claim 34, wherein the separating means comprises a blower for blowing forced gas.
Claim 38
Dependent Claim
24 words
A device as in claim 25, wherein the transfer means comprises at least one distribution conveyor which can be oscillated in a horizontal plane.
Claim 39
Dependent Claim
22 words
A device as in claim 26, further comprising a stacking device comprising a suction box arranged above at least one intermediate conveyor.
Claim 40
Dependent Claim
16 words
A device as in claim 37, wherein the stacking device is rotatable by 90° to 180°.
Claim 41
Dependent Claim
36 words
A device as in claim 37, wherein the stacking device comprises means for attracting and holding a first sheet by suction, then depositing it on a second sheet which has been positioned under the first sheet.
Claim 42
Dependent Claim
30 words
A device as in claim 25, further comprising preventing means for preventing the deposit of web forming fibres on a collecting conveyor to form fracture indications at selected splitting locations.
Claim 43
Dependent Claim
13 words
A device as in claim 25, wherein the splitting device comprises opposing blades.
Claim 44
Dependent Claim
25 words
A device as in claim 41, wherein the splitting device comprises means for splitting the primary web after the primary web leaves a collecting conveyor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |