Patent US3982977A successfully refreshed from Google Patents.
US3982977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collection mats
Assignee: Deering Milliken Research Corp
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Filing: 1975-02-24
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Granted: 1976-09-28
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Expires: 1995-02-24
Abstract
Abstract A dust control mat having a pile fabric upper surface and a bottom calendered rubber stock sheet which employs an anti-tear strip located perpendicular to the grain or calendered direction of the rubber stock sheet between the rubber sheet and a latex backing on the pile fabric. A novel method is employed to produce the mat in which the reinforcing tear strip is located in position prior to vulcanizing the rubber stock sheet in an autoclave.
Inventors
- 👤 David Edward Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:37
CPC Classifications
A; A47; A47L; A47L23/00; A47L23/22; A47L23/26; A47L23/266; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
The method of producing individual dust control mats in a vacuum mold comprising the steps of: placing a tufted pile substrate having a latex tie-coat into the vacuum mold, placing an uncured calendered rubber sheet of greater length and width on said substrate, placing a narrow elongated reinforcing strip between the substrate and the uncured calendered rubber sheet in a direction substantially perpendicular to the grain of the rubber sheet, placing a negative pressure on the vacuum mold to seal the edges of the calendered rubber sheet to the mold, curing the calendered rubber sheet and laminating same to the substrate, releasing the negative pressure and trimming the edges of the cured rubber sheet to provide a dust control mat.
Claim 2
Independent Claim
120 words
The method of producing individual dust control mats in a vacuum mold comprising the steps of: placing a tufted pile substrate having a latex tie-coat into the vacuum mold, placing an uncured calendered rubber sheet of greater length and width on said substrate, placing a narrow elongated reinforcing strip between the substrate and the uncured calendered rubber sheet in a direction substantially perpendicular to the grain of the rubber sheet, placing a negative pressure on the vacuum mold to seal the edges of the calendered rubber sheet to the mold, curing the calendered rubber sheet and laminating same to the substrate, releasing the negative pressure and trimming the edges of the cured rubber sheet to provide a dust control mat.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein a reinforcing strip is provided adjacent at least two edges of the substrate.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein the rubber sheet is placed on the substrate prior to location of the reinforcing strip and then is peeled back a predetermined distance so the reinforcing strip can be put into desired position.
References Cited (Backward Citations)
US2052071A
Cited
US2184970A
Cited
US2512727A
Cited
US3234577A
Cited
US3306808A
Cited
US3402094A
Cited
US3400039A
Cited
US3470928A
Cited
US3818823A
Cited
US3616137A
Cited
US3654019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |