US4852209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning calender rolls and the like
Assignee: Kleinewefers GmbH
•
Filing: 1988-05-16
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Granted: 1989-08-01
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Expires: 2008-05-16
Abstract
Abstract Apparatus for intermittently removing impurities from the periphery of a calender roll includes a rotary cleaning implement in the form of a brush or several felt discs and having an axial length in the range of 5-10 cm. The cleaning implement is reciprocable longitudinally of the roll along a suitable guide and can be driven back and forth by a motor so as to remove impurities which are detected by a mobile monitoring device. The latter can be mounted in or on a frame for the cleaning implement or is movable along the roll independently of the cleaning implement. The apparatus can be mounted at the inlet or outlet side of the nip of the calender roll with a companion roll. The frame for the cleaning implement can carry one or more nozzles which direct water or another liquid (such as a solvent) against the cleaning implement and/or against the roll, and one or more nozzles which blow jets of air against the periphery of the roll.
Inventors
- 👤 Peter Svenka
- 👤 Richard Rauf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:31
CPC Classifications
B; B21; B21B; B21B28/00; B21B28/02; B21B28/04; D; D21; D21G; D21G3/00; D21G3/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
120 words
Apparatus for intermittently removing impurities from a roll having a predetermined length and arranged to rotate in a predetermined direction, and being utilized in calenders and like machines, comprising a rotary cleaning implement having an axial length which is a small fraction of said predetermined length; guide means movable supporting the cleaning implement and extending in parallelism with the roll so that the cleaning implement can be moved into cleaning engagement with axially spaced-apart portions of the periphery of the roll; a frame for said cleaning implement movable along said guide means; and means for blowing a gaseous fluid against the roll, said blowing means being located past said frame as seen in the direction of rotation of the roll.
Claim 2
Dependent Claim
120 words
Apparatus for intermittently removing impurities from a roll having a predetermined length and arranged to rotate in a predetermined direction, and being utilized in calenders and like machines, comprising a rotary cleaning implement having an axial length which is a small fraction of said predetermined length; guide means movable supporting the cleaning implement and extending in parallelism with the roll so that the cleaning implement can be moved into cleaning engagement with axially spaced-apart portions of the periphery of the roll; a frame for said cleaning implement movable along said guide means; and means for blowing a gaseous fluid against the roll, said blowing means being located past said frame as seen in the direction of rotation of the roll.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1, further comprising means for admitting a liquid into the gaseous fluid which is discharged by said blowing means.
Claim 4
Dependent Claim
97 words
Apparatus for intermittently removing impurities from a roll having a predetermined length and being utilized in calenders and like machines, comprising a rotary cleaning implement having an axial length which is a small fraction of said predetermined length; guide means movably supporting the cleaning implement and extending in parallelism with the roll so that the cleaning implement can be moved into cleaning engagement with axially spaced-apart portions of the periphery of the roll; means for monitoring the periphery of the roll for the presence of impurities; and means for moving said monitoring means longitudinally of the roll.
Claim 5
Dependent Claim
97 words
Apparatus for intermittently removing impurities from a roll having a predetermined length and being utilized in calenders and like machines, comprising a rotary cleaning implement having an axial length which is a small fraction of said predetermined length; guide means movably supporting the cleaning implement and extending in parallelism with the roll so that the cleaning implement can be moved into cleaning engagement with axially spaced-apart portions of the periphery of the roll; means for monitoring the periphery of the roll for the presence of impurities; and means for moving said monitoring means longitudinally of the roll.
Claim 6
Dependent Claim
42 words
The apparatus of claim 3, further comprising means for moving the guide means and the cleaning implement substantially radially of the implement so as to place the cleaning implement into engagement with or to move the cleaning implement away from the roll.
Claim 7
Dependent Claim
18 words
The apparatus of claim 3, wherein the axial length of the cleaning implement is less than 11 cm.
Claim 8
Dependent Claim
20 words
The apparatus of claim 5, wherein the axial length of the cleaning implement is in the range of 4-6 cm.
Claim 9
Dependent Claim
15 words
The apparatus of claim 3, wherein said cleaning implement includes at least one rotary brush.
Claim 10
Dependent Claim
15 words
The apparatus of claim 3, wherein said cleaning implement includes at least one rotary disc.
Claim 11
Dependent Claim
28 words
The apparatus of claim 3, wherein said cleaning implement includes a plurality of discs at least one of which contains felt, and means for loosely mounting said discs.
Claim 12
Dependent Claim
58 words
The apparatus of claim 3 for intermittently cleaning a roll which cooperates with a second roll and defines therewith a nip having an inlet side for admission of a material to be treated during advancement through the nip and an outlet side, wherein said cleaning implement is disposed at the outlet side of the nip of the rolls.
Claim 13
Dependent Claim
34 words
The apparatus of claim 3, further comprising a frame for said cleaning implement, said frame being movable with the cleaning implement along said guide means; and further comprising a wetting device on said frame.
Claim 14
Dependent Claim
19 words
The apparatus of claim 11, wherein said wetting device comprises means for directing a liquid against the cleaning implement.
Claim 15
Dependent Claim
21 words
The apparatus of claim 11, wherein said wetting device comprises means for directing a liquid against the periphery of the roll.
Claim 16
Dependent Claim
15 words
The apparatus of claim 11, wherein said wetting device comprises at least one spray nozzle.
Claim 17
Dependent Claim
25 words
The apparatus of claim 3, further comprising a hood partially surrounding said cleaning implement and arranged to intercept impurities which are removed from the roll.
Claim 18
Dependent Claim
14 words
The apparatus of claim 15, further comprising means for evacuating impurities from said hood.
Claim 19
Dependent Claim
15 words
The apparatus of claim 3, further comprising means for repelling impurities from said cleaning implement.
Claim 20
Dependent Claim
46 words
The apparatus of claim 3, wherein said monitoring means includes means for generating signals denoting the presence of impurities; and further comprising means for moving said cleaning implement along said guide means to a position for removal of impurities which are detected by said monitoring means.
Claim 21
Dependent Claim
31 words
The apparatus of claim 3, further comprising a frame supporting said cleaning implement, said frame constituting or forming part of said means for moving the monitoring means longitudinally of the roll.
Claim 22
Dependent Claim
33 words
The apparatus of claim 3, further comprising a frame supporting said cleaning implement and movable along said guide means, said moving means including means for moving the monitoring means independently of said frame.
Claim 23
Dependent Claim
33 words
The apparatus of claim 20, further comprising means for moving the frame and the cleaning implement along said guide means to positions for removal of impurities which are detected by said monitoring means.
Claim 24
Dependent Claim
15 words
The apparatus of claim 3, wherein said monitoring means includes means for detecting colored impurities.
Claim 25
Dependent Claim
18 words
The apparatus of claim 3, wherein said monitoring means includes means for monitoring the temperature of the roll.
References Cited (Backward Citations)
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Cited
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US3737940A
Cited
US3952361A
Cited
US3974540A
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |