US3874394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back roll cleaning apparatus and method
Assignee: Individual
•
Filing: 1972-07-21
•
Granted: 1975-04-01
•
Expires: 1992-07-21
Abstract
Abstract A back roll cleaning apparatus and method is provided employing a rotatable cleaning roll, having a resilient covering carrying a liquid cleaning medium for rinsing and scrubbing said back roll, urged into engagement with said back roll under predetermined pressure across a plane passing through the axis of rotation of each of said rolls to avoid stripping and other contamination of a web by the action of the back roll.
Inventors
- 👤 James F Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:24
CPC Classifications
B; B41; B41F; B41F35/00; D; D06; D06B; D06B23/00; D06B23/30; B41P; B41P2235/00; B41P2235/10; B41P2235/20; B41P2235/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
FOR USE IN A WEB COATING APPARATUS HAVING APPLICATOR MEANS FOR APPLYING A LIQUID COATING MATERIAL ACROSS ONE SIDE OF A WEB AND A ROTATABLE BACK ROLL OPPOSIDE AND ALIGNED WITH SAID MEANS FOR APPLYING A LIQUID COATING CARRYING THE OTHER SIDE OF SAID WEB, A CLEANER FOR SAID BACK ROLL AVOIDING CONTAMINATION THEREOF COMPRISING: A. A ROTATABLE CLEANING ROLL ALIGNED WITH SAID BACK ROLL OPPOSITE SAID APPLICATOR MEANS; B. A RESILIENT COMPRESSIBLE COATING OVER SAID CLEANING ROLL SUBSTANTIALLY IMPERVIOUS TO SAID LIQUID CLEANING MEDIUM; C. A FABRIC SLEEVE OVER SAID RESILIENT COATING; D. MEANS SUPPLYING A LIQUID CLEANING MEDIUM TO SAID CLEANING ROLL FOR APPLICATION THEREBY TO SAID BACK ROLL AND FOR REMOVING CONTAMINANTS FROM SAID RESILIENT COVERING; E. MEANS URGING SAID CLEANING ROLL INTO ENGAGEMENT WITH SAID BACK ROLL UNDER PREDETERMINED PRESSURE SUFFICIENT TO COMPRESS SAID RESILIENT COATING; F. DRIVING MEANS ROTATING SAID CLEANING ROLL WITH RESPECT TO SAID BACK ROLL; AND
Claim 2
Dependent Claim
154 words
FOR USE IN A WEB COATING APPARATUS HAVING APPLICATOR MEANS FOR APPLYING A LIQUID COATING MATERIAL ACROSS ONE SIDE OF A WEB AND A ROTATABLE BACK ROLL OPPOSIDE AND ALIGNED WITH SAID MEANS FOR APPLYING A LIQUID COATING CARRYING THE OTHER SIDE OF SAID WEB, A CLEANER FOR SAID BACK ROLL AVOIDING CONTAMINATION THEREOF COMPRISING: A. A ROTATABLE CLEANING ROLL ALIGNED WITH SAID BACK ROLL OPPOSITE SAID APPLICATOR MEANS; B. A RESILIENT COMPRESSIBLE COATING OVER SAID CLEANING ROLL SUBSTANTIALLY IMPERVIOUS TO SAID LIQUID CLEANING MEDIUM; C. A FABRIC SLEEVE OVER SAID RESILIENT COATING; D. MEANS SUPPLYING A LIQUID CLEANING MEDIUM TO SAID CLEANING ROLL FOR APPLICATION THEREBY TO SAID BACK ROLL AND FOR REMOVING CONTAMINANTS FROM SAID RESILIENT COVERING; E. MEANS URGING SAID CLEANING ROLL INTO ENGAGEMENT WITH SAID BACK ROLL UNDER PREDETERMINED PRESSURE SUFFICIENT TO COMPRESS SAID RESILIENT COATING; F. DRIVING MEANS ROTATING SAID CLEANING ROLL WITH RESPECT TO SAID BACK ROLL; AND
Claim 3
Dependent Claim
27 words
The cleaner set forth in claim 1, wherein said means supplying liquid cleaning medium is a trough in which said cleaning roll is immersed in the medium.
Claim 4
Dependent Claim
32 words
The cleaner set forth in claim 1, wherein said means urging said cleaning roll into engagement is self-adjusting acting on a plane passing through the longitudinal axis of each of said rolls.
Claim 5
Dependent Claim
39 words
The cleaner set forth in claim 1, wherein the means for removing liquid cleaning medium is an aligned roll urged against the back roll causing liquid cleaning medium deposited on the back roll to pass down the face thereof.
References Cited (Backward Citations)
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Cited
US2106104A
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US2339891A
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US2363817A
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Cited
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |