US3982328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dryer for material coated on two surfaces
Assignee: Svenska Flaktfabriken AB
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Filing: 1975-05-28
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Granted: 1976-09-28
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Expires: 1995-05-28
Abstract
Abstract Web or sheet material is carried on air to advance the material in a fixed stable floating position through one or more decks of a treating plant, preferably a drier. Fixing chambers providing an air flow substantially parallel to the plane of the material and blow boxes with an air flow substantial perpendicular to said plane of the material are located adjacent each other on both sides of the material and are arranged to face each other mutually on the opposite sides of the plane of the material.
Inventors
- 👤 Rune Gustafsson
- 👤 Ingemar Karlsson
- 👤 Rolf Akesson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:10
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/24; B29; B29B; B29B13/00; B29B13/02; B29B13/023; B29C; B29C31/00; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/25; B29C48/88; B29C48/91; F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; F26B13/104; B29C35/045; B65H2406/00; B65H2406/10; B65H2406/11; B65H2406/112
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
262 words
An apparatus for the treatment of web or sheet material carried by means of air to advance the material in a fixed stable floating position without flutter in a conveying path through one or more decks of a treating plant to dry a double-coated material web, consisting of air supply means comprising a plurality of treatment blow boxes and fixing-chamber blow boxes distributed along the conveying path of the web and provided with apertures for outflow of the air against the material, and air exhaust means comprising a plurality of tap apertures provided in or adjacent the blow boxes, characterized in that the web path on each deck of the treating plant is between two blow box series respectively parallel to said path, the series being built up of a combination of a number of treatment blow boxes having a plurality of apertures for the air distributed over the plane of the blow box for blowing air perpendicularly against the web path, with an equal number of blow boxes designated as fixing chambers having apertures for air ejection in parallel with the material web path to fix the material, said series being disposed so that each fixing chamber blow box on one side of the web path faces a treatment blow box on the opposite side of the material web path, and each treatment blow box on the one side of the web path faces a fixing chamber mounted on the opposite side of the web path, the treatment boxes alternating with the fixing chambers in each of said blow box series.
Claim 2
Independent Claim
262 words
An apparatus for the treatment of web or sheet material carried by means of air to advance the material in a fixed stable floating position without flutter in a conveying path through one or more decks of a treating plant to dry a double-coated material web, consisting of air supply means comprising a plurality of treatment blow boxes and fixing-chamber blow boxes distributed along the conveying path of the web and provided with apertures for outflow of the air against the material, and air exhaust means comprising a plurality of tap apertures provided in or adjacent the blow boxes, characterized in that the web path on each deck of the treating plant is between two blow box series respectively parallel to said path, the series being built up of a combination of a number of treatment blow boxes having a plurality of apertures for the air distributed over the plane of the blow box for blowing air perpendicularly against the web path, with an equal number of blow boxes designated as fixing chambers having apertures for air ejection in parallel with the material web path to fix the material, said series being disposed so that each fixing chamber blow box on one side of the web path faces a treatment blow box on the opposite side of the material web path, and each treatment blow box on the one side of the web path faces a fixing chamber mounted on the opposite side of the web path, the treatment boxes alternating with the fixing chambers in each of said blow box series.
Claim 3
Dependent Claim
38 words
An apparatus as defined in claim 1, characterized in that the fixing chambers have their apertured surfaces facing toward the web at the distance -10 mm to +30 mm from the longitudinal center plane of the conveying path.
Claim 4
Dependent Claim
32 words
An apparatus as defined in claim 1, characterized in that the fixing chambers have their apertured surfaces facing toward the web in the same plane, on each side of the conveyance path.
Claim 5
Dependent Claim
42 words
An apparatus as defined in claim 1, characterized in that the fixing chambers and the blow boxes are provided with means for controlling the air flow therefrom independently of each other to control the drying effect on opposite sides of the web.
Claim 6
Dependent Claim
47 words
An apparatus as defined in claim 1, characterized in that at least the fixing chambers are movable and supported on the drive side so that at least one edge of the fixing chamber can be lifted and, respectively, lowered for threading the lead portion of the web.
References Cited (Backward Citations)
US3070901A
Cited
US3231165A
Cited
US3199224A
Cited
US3622058A
Cited
US3559301A
Cited
US3837551A
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 |