US3643344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying cylinders
Assignee: RECH ET DE REALISATIONS IND S
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Filing: 1968-07-17
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Granted: 1972-02-22
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Expires: 1988-07-17
Abstract
Abstract This invention relates to improvements in drying cylinders for papermaking machines which comprise two concentric cylindrical casings, the confronting walls of which provide a chamber which is separated into individual compartments each of which is fed with controlled quantities of steam, the cylinder also including an evacuation system for the condensed liquid.
Inventors
- 👤 Henri Robert Strube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:22
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/14; F26B13/18; F26B13/183; D; D21; D21F; D21F5/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
In a rotatable dryer cylinder for the drying of paper in papermaking machines, the combination comprising, coaxial inner and outer cylinder walls defining an annular chamber there between for the circulation of vapor, said chamber having annular means subdividing the chamber along its length dimension into a plurality of juxtaposed separate compartments, at least one apertured end closure means for the cylinder, a rotary distributor having a fixed outer member and a concentrically disposed rotatable inner member associated with at least one of said apertured end closure means, said concentric inner and outer members having defined therebetween a series of separate annular chambers, inlet and outlet means connected to said chambers, control means for feeding stem to said annular chambers of said rotary distributor, and therethrough to said juxtaposed separate compartment in said dryer cylinder, said outlet means exhausting condEnsate from said separate compartments axially of said rotary distributor through a collector means to one of said annular chambers in said rotary distributor.
Claim 2
Dependent Claim
163 words
In a rotatable dryer cylinder for the drying of paper in papermaking machines, the combination comprising, coaxial inner and outer cylinder walls defining an annular chamber there between for the circulation of vapor, said chamber having annular means subdividing the chamber along its length dimension into a plurality of juxtaposed separate compartments, at least one apertured end closure means for the cylinder, a rotary distributor having a fixed outer member and a concentrically disposed rotatable inner member associated with at least one of said apertured end closure means, said concentric inner and outer members having defined therebetween a series of separate annular chambers, inlet and outlet means connected to said chambers, control means for feeding stem to said annular chambers of said rotary distributor, and therethrough to said juxtaposed separate compartment in said dryer cylinder, said outlet means exhausting condEnsate from said separate compartments axially of said rotary distributor through a collector means to one of said annular chambers in said rotary distributor.
Claim 3
Dependent Claim
22 words
A drier cylinder according to claim 1, wherein the control means comprise valve means disposed in the inlet means in the cylinder.
Claim 4
Dependent Claim
28 words
The drier cylinder according to claim 1, wherein the control means for the inlet means is arranged to vary the degree of heat transmitted to the respective compartments.
Claim 5
Dependent Claim
17 words
A drier cylinder according to claim 1, wherein each compartment is provided with tangentially disposed baffle means.
Claim 6
Dependent Claim
25 words
A drier cylinder according to claim 4, wherein said baffle means in said compartments are arranged to converge toward the outer wall of said cylinder.
Claim 7
Dependent Claim
27 words
A drier cylinder according to claim 4, wherein at least one of said baffles means has a shorter radially extending length dimension than an adjacent baffle means.
Claim 8
Dependent Claim
26 words
A dryer cylinder according to claim 1, in which each of said inlet means is associated with a corresponding connecting chamber and said flow control means.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |