US3877959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating seaming tape
Assignee: Individual
•
Filing: 1970-06-01
•
Granted: 1975-04-15
•
Expires: 1990-06-01
Abstract
Abstract A backing strip and a loosely woven strip of joining fabric positioned thereon travel under tension through an application zone where a layer of hot-melt adhesive is applied by extrusion and then the tensioned strips with the adhesive layer thereon passes around two chilled rolls to harden the adhesive. The first chilled roll hardens an inner zone of the adhesive layer and subsequently recesses in a second chilled roll to either form longitudinal ribs or form rows of projections in the remainder of the adhesive layer.
Inventors
- 👤 Sigmond Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:04
CPC Classifications
D; D06; D06M; D06M17/00; D06M17/04; A; A47; A47G; A47G27/00; A47G27/04; A47G27/0437; A47G27/0443; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
196 words
In a method of fabricating a tape wherein a heated hot-melt adhesive is applied to a traveling backing strip to form a layer of the adhesive thereon, the improvement to form projections in the adhesive layer, including the steps of partially cooling the adhesive layer through the backing strip to form a hardened stratum of the adhesive coating contiguous to the backing strip; drawing the tape around the outer circumference of a roll having recesses in the outer circumferential surface thereof with the adhesive coating against the periphery of the roll at the recesses and while the adhesive is in a heated soft state, and maintaining the tape under tension to force the soft adhesive into the recesses of the roll while the hardened stratum of the adhesive coating resists deformation by the roll and Thereby limits the extent to which the heated soft adhesive enters the recesses of the roll, whereby hardened projections are formed in the adhesive coating which correspond to the recesses in the roll with the projections interconnected to each other and to the backing strip through the hardened stratum of the adhesive coating in the area contiguous to the backing strip.
Claim 2
Dependent Claim
196 words
In a method of fabricating a tape wherein a heated hot-melt adhesive is applied to a traveling backing strip to form a layer of the adhesive thereon, the improvement to form projections in the adhesive layer, including the steps of partially cooling the adhesive layer through the backing strip to form a hardened stratum of the adhesive coating contiguous to the backing strip; drawing the tape around the outer circumference of a roll having recesses in the outer circumferential surface thereof with the adhesive coating against the periphery of the roll at the recesses and while the adhesive is in a heated soft state, and maintaining the tape under tension to force the soft adhesive into the recesses of the roll while the hardened stratum of the adhesive coating resists deformation by the roll and Thereby limits the extent to which the heated soft adhesive enters the recesses of the roll, whereby hardened projections are formed in the adhesive coating which correspond to the recesses in the roll with the projections interconnected to each other and to the backing strip through the hardened stratum of the adhesive coating in the area contiguous to the backing strip.
Claim 3
Dependent Claim
36 words
An improvement as set forth in claim 1 in which the prior step is carried out by moving the tape under tension around at least a portion of the outer circumference of a chilled precooling roll.
Claim 4
Dependent Claim
17 words
An improvement as set forth in claim 2 in which the recessed roll is a chilled roll.
References Cited (Backward Citations)
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |