US3853662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for laminating uniaxially stretched thin layers of film as warps and wefts
Assignee: Kobe Steel Ltd
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Filing: 1973-08-01
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Granted: 1974-12-10
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Expires: 1993-08-01
Abstract
Abstract A laminate is prepared from uniaxially stretched layers of film as warps and wefts by supplying a uniaxially stretched thin layer of film, cut to a desired length, continuously at a constant speed over a belt circulating at a speed higher than the layersupporting speed through a pinching-and-forwarding means provided in proximity to the circulating belt, while sucking the cut layer onto the belt by a negative pressure exerted below from the belt, subjecting the layer to frictional rubbing by sliding on the belt owing to a difference between the layer-supplying speed and the belt-circulating speed, placing the thin layer upon the belt by suction at the time when the rear end of the thin layer has passed through the pinching-and-forwarding means thereby to make the thin layer move at a speed equal to that of the belt, allowing successive thin layers, cut to the desired length, to be transferred onto the belt by suction at a distance corresponding to the difference between the layer-supplying speed and beltcirculating speed one by one, bringing the thin layer as wefts over a warped thin air-permeable layer of uniaxially stretched materials of film having cleavages as warps, the thin layer wefts being crossed over the thin layer warps, allowing the thin layer wefts to be placed upon the continuously running warps by drawing force exerted between the warps and wefts or pushing down from the belt towards warps forcibly immediately when the wefts are brought in a position where the length of wefts is over-lapped entirely with the width of warps, and placing the successive wefts upon the successive warps continuously without any substantial gaps by repetition of said steps.
Inventors
- 👤 M Yazawa
- 👤 K Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:06
CPC Classifications
B; B32; B32B; B32B27/00; D; D04; D04H; D04H13/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T156/1077; Y10T156/1089; Y10T156/1092
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
269 words
A PROCESS FOR LAMINATING UNIAXIALLY STRETCHED LAYERS OF FILM AS WARPS AND WEFTS, WHICH COMPRISES SUPPLYING A UNIAXIALLY STRETCHED THIN LAYER OF FILM, CUT TO A DESIRED LENGTH, CONTI UOUSLY AT A CONSTANT SPEED OVER A BELT CIRCULATING AT A SPEED HIGHER THAN THE LAYER SUPPLYING SPEED THROUGH A PINCHING-ANDFORWARDING MEANS PROVIDED IN PROXIMITY TO THE CIRCULATING BELT, WHILE SUCKING THE LAYER ONTO THE BELT BY A NEGATIVE PRESSURE EXERTED BELOW FROM THE BELT, SUBJECTING THE LAYER TO FRICTIONAL RUBBING BY SLIDING OVER THE BELT OWING TO A DIFFERENCE BETWEEN THE LAYER-SUPPLYING SPEED AND THE BELT-CIRCULATING SPEED, PLACING THE THIN LAYER UPON THE BELT BY SUCTION AT THE TIME WHEN THE REAR END OF THE THIN LAYER HAS PASSED THROUGH THE PINCHING-AND-FORWARDING MEANS THEREBY TO MAKE THE THIN LAYER MOVE AT SPEED EQUAL TO THAT OF THE BELT, ALLOWING SUCCESSIVE THIN LAYERS, CUT TO THE DESIRED LENGTH, TO BE TRANSFERRED ONTO THE BELT BY SUCTION AT A DISTANCE CORRESPONDING TO THE DIFFERENCE BETWEEN THE LAYER-SUPPLYING SPEED AND THE BELTCIRCULATING SPEED ONE BY ONE, BRINGING THE THIN LAYER AS WEFTS OVER A WARPED THIN AIR-PERMEABLE LAYERS OF UNIAXIALLY STRETCHED MATERIALS OF FILM HAVING CLEAVAGES AS WARPS, THE THIN LAYER WEFTS BEING CROSSED OVER THE THIN LAYER WARPS, ALLOWING THE THIN LAYER WEFTS TO BE PLACED UPON THE CONTINUOUSLY RUNNING WARPS BY DRAWING FORCE EXERTING BETWEEN THE WARPS AND WEFTS IMMEDIATELY WHEN THE WEFTS ARE BROUGHT IN A POSITION WHERE THE LENGTH OF WEFTS IS OVERLAPPED ENTIRELY WITH THE WIDTH OF WARPS, AND PLACING THE SUCCESSIVE WEFTS UPON THE SUCCESSIVE WARPS CONTINUOUSLY WITHOUT ANY SUBSTANTIAL GAPS BY REPETITION OF SAID STEPS.
Claim 2
Dependent Claim
269 words
A PROCESS FOR LAMINATING UNIAXIALLY STRETCHED LAYERS OF FILM AS WARPS AND WEFTS, WHICH COMPRISES SUPPLYING A UNIAXIALLY STRETCHED THIN LAYER OF FILM, CUT TO A DESIRED LENGTH, CONTI UOUSLY AT A CONSTANT SPEED OVER A BELT CIRCULATING AT A SPEED HIGHER THAN THE LAYER SUPPLYING SPEED THROUGH A PINCHING-ANDFORWARDING MEANS PROVIDED IN PROXIMITY TO THE CIRCULATING BELT, WHILE SUCKING THE LAYER ONTO THE BELT BY A NEGATIVE PRESSURE EXERTED BELOW FROM THE BELT, SUBJECTING THE LAYER TO FRICTIONAL RUBBING BY SLIDING OVER THE BELT OWING TO A DIFFERENCE BETWEEN THE LAYER-SUPPLYING SPEED AND THE BELT-CIRCULATING SPEED, PLACING THE THIN LAYER UPON THE BELT BY SUCTION AT THE TIME WHEN THE REAR END OF THE THIN LAYER HAS PASSED THROUGH THE PINCHING-AND-FORWARDING MEANS THEREBY TO MAKE THE THIN LAYER MOVE AT SPEED EQUAL TO THAT OF THE BELT, ALLOWING SUCCESSIVE THIN LAYERS, CUT TO THE DESIRED LENGTH, TO BE TRANSFERRED ONTO THE BELT BY SUCTION AT A DISTANCE CORRESPONDING TO THE DIFFERENCE BETWEEN THE LAYER-SUPPLYING SPEED AND THE BELTCIRCULATING SPEED ONE BY ONE, BRINGING THE THIN LAYER AS WEFTS OVER A WARPED THIN AIR-PERMEABLE LAYERS OF UNIAXIALLY STRETCHED MATERIALS OF FILM HAVING CLEAVAGES AS WARPS, THE THIN LAYER WEFTS BEING CROSSED OVER THE THIN LAYER WARPS, ALLOWING THE THIN LAYER WEFTS TO BE PLACED UPON THE CONTINUOUSLY RUNNING WARPS BY DRAWING FORCE EXERTING BETWEEN THE WARPS AND WEFTS IMMEDIATELY WHEN THE WEFTS ARE BROUGHT IN A POSITION WHERE THE LENGTH OF WEFTS IS OVERLAPPED ENTIRELY WITH THE WIDTH OF WARPS, AND PLACING THE SUCCESSIVE WEFTS UPON THE SUCCESSIVE WARPS CONTINUOUSLY WITHOUT ANY SUBSTANTIAL GAPS BY REPETITION OF SAID STEPS.
Claim 3
Dependent Claim
27 words
A process according to claim 1, wherein the thin layer wefts are placed upon the warps by air suction exerted by negative pressure below from the warps.
Claim 4
Dependent Claim
35 words
A process according to claim 1, wherein the thin layer wefts are placed upon the warps by electrostatic attraction exerted by electric potential between two electrodes plates provided in parallel outside the warps and wefts.
Claim 5
Dependent Claim
217 words
A process for bringing wefts onto a warp running continuously in a process for laminating uniaxially stretched layers of film as warps and wefts, which comprises supplying a uniaxially stretched thin layer of film continuously at a constant speed over a belt circulating at a speed higher than the layer-supplying speed through a pinching and supplying means provided in proximity to the circulating belt, while sucking the supplied layer onto the belt by a negative pressure exerted from the back-side of the belt; subjecting the layer to cutting to a desired length to prepare wefts one after another, thereby allowing the wefts to move at a speed equal to that of the belt after the time when the rear end of the thin layer has passed through a cutting means, leaving a distance from the successive weft, corresponding to the difference between the layer-supplying speed and the belt-circulating speed; bringing the thin layer as wefts over a warped thin air-permiable layer of uniaxially stretched materials of film having cleavages as warps; subjecting the weft to be placed upon the continuously running warps to a momentary pushing down force off the belt towards the running warp immediately when the wefts are brought in a position where the length of wefts is overlapped entirely with the width of warps.
Claim 6
Dependent Claim
217 words
A process for bringing wefts onto a warp running continuously in a process for laminating uniaxially stretched layers of film as warps and wefts, which comprises supplying a uniaxially stretched thin layer of film continuously at a constant speed over a belt circulating at a speed higher than the layer-supplying speed through a pinching and supplying means provided in proximity to the circulating belt, while sucking the supplied layer onto the belt by a negative pressure exerted from the back-side of the belt; subjecting the layer to cutting to a desired length to prepare wefts one after another, thereby allowing the wefts to move at a speed equal to that of the belt after the time when the rear end of the thin layer has passed through a cutting means, leaving a distance from the successive weft, corresponding to the difference between the layer-supplying speed and the belt-circulating speed; bringing the thin layer as wefts over a warped thin air-permiable layer of uniaxially stretched materials of film having cleavages as warps; subjecting the weft to be placed upon the continuously running warps to a momentary pushing down force off the belt towards the running warp immediately when the wefts are brought in a position where the length of wefts is overlapped entirely with the width of warps.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |