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US4075765A Expired / Lapsed US ⏱️ 0.0 years remaining

Process and device for drying fibrous material

Assignee: Karrer System AG
•
Filing: 1975-12-12
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Granted: 1978-02-28
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Expires: 1995-12-12
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Abstract

Abstract A method and apparatus for drying separate units of moist fibrous material. The method may include the steps of flowing under a pressure greater than one atmosphere in a closed circuit a gaseous medium through both units of material, such that the gaseous exhaust from one unit is the gaseous intake of another unit, and heating the gaseous medium subsequent to its passage through the units of fibrous material by compressing the gaseous medium. The apparatus may include two containers each of which has a support for the fibrous material to be dried, the material being positioned on the support to divide the interior of each of said containers into an inner and an outer chamber which communicate with each other via the material, and a circulation system having a gaseous drying medium therein. The system includes the containers and comprises a first connection line for fluidly interconnecting the two inner chambers, a second connection line for fluidly interconnecting the two outer chambers, a first device for heating the gaseous drying medium in the first connection, a second device for heating the gaseous drying medium in the second connection line, and a water separator. One of the two devices is a compressor, the suction end of which is connected to the water separator.

Inventors

  • 👤 Friedrich Wilhelm Johann Karrer
  • 👤 Per Gustaf Mellgren

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 20:06
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B21/33; F26B21/333; F26B21/006; F26B21/007

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 77 words
A process for drying two separate units of moist fibrous material, in particular in the form of reels of yarn, comprising flowing under a pressure greater than one atmosphere in a closed circuit a gaseous medium through both units of material, such that the gaseous exhaust from one unit is the gaseous intake of said other unit, and heating the gaseous medium subsequent to its passage through the units of fibrous material by compressing the gaseous medium.
Claim 2
Dependent Claim 77 words
A process for drying two separate units of moist fibrous material, in particular in the form of reels of yarn, comprising flowing under a pressure greater than one atmosphere in a closed circuit a gaseous medium through both units of material, such that the gaseous exhaust from one unit is the gaseous intake of said other unit, and heating the gaseous medium subsequent to its passage through the units of fibrous material by compressing the gaseous medium.
Claim 3
Dependent Claim 27 words
A process as claimed in claim 1, wherein: the moisture content of one of the units of fibrous material is different than that of the other unit.
Claim 4
Independent Claim 152 words
An apparatus for drying fibrous material comprising: two containers each of which has a support for the fibrous material to be dried, the material being positioned on the support in a manner such as to divide the interior of each of said containers into an inner and an outer chamber which communicate with each other via the material; a circulation system having a gaseous drying medium therein, said system including said containers and comprising; a first connection line for fliudly interconnecting the two inner chambers, a second connection line for fluidly interconnecting the two outer chambers, a first means for heating the gaseous drying medium in said first connection line, a second means for heating the gaseous drying medium in said second connection line, and a water separator; one of said first and second heating means comprises a compressor; and the suction end of said compressor is connected to said water separator.
Claim 5
Independent Claim 152 words
An apparatus for drying fibrous material comprising: two containers each of which has a support for the fibrous material to be dried, the material being positioned on the support in a manner such as to divide the interior of each of said containers into an inner and an outer chamber which communicate with each other via the material; a circulation system having a gaseous drying medium therein, said system including said containers and comprising; a first connection line for fliudly interconnecting the two inner chambers, a second connection line for fluidly interconnecting the two outer chambers, a first means for heating the gaseous drying medium in said first connection line, a second means for heating the gaseous drying medium in said second connection line, and a water separator; one of said first and second heating means comprises a compressor; and the suction end of said compressor is connected to said water separator.
Claim 6
Dependent Claim 26 words
An apparatus as claimed in claim 3, further comprising: a valve means for reversing the direction of circulation of the gaseous drying medium through the containers.
Claim 7
Dependent Claim 17 words
An apparatus as claimed in claim 4, further comprising: a four-way valve in said second connection line.
Claim 8
Dependent Claim 25 words
An apparatus as claimed in claim 5, further comprising: valve means for fluidly disconnecting each of the containers from the remainder of said circulation system.
Claim 9
Dependent Claim 26 words
An apparatus as claimed in claim 3, further comprising: a compressed air terminal with a shut-off device in one of said first and second connection lines.

References Cited (Backward Citations)

US1997380A Cited
US2223588A Cited
US2739392A Cited
US3631691A Cited
US3927478A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-02-27 1981-08-29 1982-02-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-02-27 1985-08-29 1986-02-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-02-27 1989-08-29 1990-02-28 $7700.00 Window Closed / Lapsed

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