US3640218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal assembly for sleeve-type gravure rolls
Assignee: Individual
•
Filing: 1970-06-25
•
Granted: 1972-02-08
•
Expires: 1990-06-25
Abstract
Abstract A seal assembly for sealing a sleeve-type gravure roll to prevent ink penetration between the roll end members and the sleeve. Each seal assembly includes an inwardly beveled conical surface on the end member, a resilient seal ring disposed adjacent the conical surface, a pressure ring disposed adjacent the sealing ring, and a winding of pneumatic tubing located inwardly of and adjacent the pressure ring. Inflation of the tubing forces the pressure ring against the sealing ring and expands the sealing ring outwardly along the conical surface of the end member into engagement with the inner surface of the sleeve end, the sealing ring being elastically deformed so as to completely fill the space between the sleeve end and the end member to prevent penetration of ink beneath the sleeve.
Inventors
- 👤 Thomas K Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:36
CPC Classifications
B; B41; B41F; B41F27/00; B41F27/10; B41F27/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
161 words
In a gravure roll assembly including a thin-walled tubular gravure printing sleeve, and an expanding mandrel for supporting and driving the sleeve in rotation, said mandrel including a shaft, a pair of axially spaced end members secured to the shaft, and means on the shaft betweEn the end members selectively radially expandable against the sleeve, the improvement comprising seal means for sealing each end of the sleeve adjacent the end members, said seal means comprising an axially inwardly beveled substantially conical surface on each of the end members, a resilient seal ring disposed adjacent said annular surface, said seal ring having a relaxed diameter slightly less than the inner diameter of the sleeve, a pressure ring disposed inwardly adjacent said seal ring, and means for selectively providing axial movement of said pressure ring toward the end member to move said seal ring along said conical surface into a sealing disposition between the end member and the inner surface of the sleeve.
Claim 2
Dependent Claim
161 words
In a gravure roll assembly including a thin-walled tubular gravure printing sleeve, and an expanding mandrel for supporting and driving the sleeve in rotation, said mandrel including a shaft, a pair of axially spaced end members secured to the shaft, and means on the shaft betweEn the end members selectively radially expandable against the sleeve, the improvement comprising seal means for sealing each end of the sleeve adjacent the end members, said seal means comprising an axially inwardly beveled substantially conical surface on each of the end members, a resilient seal ring disposed adjacent said annular surface, said seal ring having a relaxed diameter slightly less than the inner diameter of the sleeve, a pressure ring disposed inwardly adjacent said seal ring, and means for selectively providing axial movement of said pressure ring toward the end member to move said seal ring along said conical surface into a sealing disposition between the end member and the inner surface of the sleeve.
Claim 3
Dependent Claim
21 words
The invention as claimed in claim 1 including means for resiliently biasing said pressure ring axially away from the end member.
Claim 4
Dependent Claim
26 words
The invention as claimed in claim 2 wherein said latter means includes a ring of resilient material disposed between the end member and said pressure ring.
Claim 5
Dependent Claim
24 words
The invention as claimed in claim 1 wherein said means for selectively providing axial movement of said pressure ring comprises fluid pressure actuated means.
Claim 6
Dependent Claim
36 words
The invention as claimed in claim 4 wherein said fluid actuated means comprises a length of pneumatic tubing wound circumferentially about the shaft, and valve means communicating with said tubing extending exteriorly of the end member.
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |