Patent US3897578A successfully refreshed from Google Patents.
US3897578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing capsule-coated sheets
Assignee: Fujifilm Holdings Corp
•
Filing: 1974-01-02
•
Granted: 1975-07-29
•
Expires: 1994-01-02
Abstract
Abstract Microcapsule coated sheets can be efficiently produced by a process wherein excess microcapsule coating composition is removed from a running base sheet by a mechanical tool which by shear force meters and levels the microcapsule coating composition, if the microcapsule coating composition has a solids content of about 20 to 80 weight percent and a viscosity of 50 to 50,000 c.p.
Inventors
- 👤 Masao Kanda
- 👤 Keiso Saeiki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:15
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B05D7/04; B41; B41M; B41M5/00; B41M5/124; B41M5/1246
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
101 words
A PROCESS OF PRODUCING A CAPSULE-COTED SHEET CHARACTERIZED BY THE STEPS OF APPLYING AN EXCESS OF A COATING COMPOSITION CONTAINING MICROCAPSULES AND HAVING SOLIDS CONTENT OF FROM ABOUT 20 TO ABOUT 80 WEIGHT % AND A VISCOSITY OF 50 TO 50,000 C.P. TO A RUNNING BASE SHEET AND THEREAFTER APPLYING A SHEARING FORCE BY MEANS OF A BLADE OR METERING BAR TO THE COATING COMPOSITION BY DIRECTLY PRESSING THEREAGAINST SAID BLADE OR BAR TO REMOVE EXCESS COATING COMPOSITION FROM SAID BASE SHEER AND SPREAD SAID COMPOSITION UNIFORMLY OVER SAID RUNNING BASE SHEET, SAID SHEARING FORCE BEING INSUFFICIENT TO BREAK SAID MICROCAPSULES.
Claim 2
Dependent Claim
101 words
A PROCESS OF PRODUCING A CAPSULE-COTED SHEET CHARACTERIZED BY THE STEPS OF APPLYING AN EXCESS OF A COATING COMPOSITION CONTAINING MICROCAPSULES AND HAVING SOLIDS CONTENT OF FROM ABOUT 20 TO ABOUT 80 WEIGHT % AND A VISCOSITY OF 50 TO 50,000 C.P. TO A RUNNING BASE SHEET AND THEREAFTER APPLYING A SHEARING FORCE BY MEANS OF A BLADE OR METERING BAR TO THE COATING COMPOSITION BY DIRECTLY PRESSING THEREAGAINST SAID BLADE OR BAR TO REMOVE EXCESS COATING COMPOSITION FROM SAID BASE SHEER AND SPREAD SAID COMPOSITION UNIFORMLY OVER SAID RUNNING BASE SHEET, SAID SHEARING FORCE BEING INSUFFICIENT TO BREAK SAID MICROCAPSULES.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said microcapsules have a size less than about 100 Mu .
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said microcapsules have a size in the range of from about 10 Mu to about 50 Mu .
References Cited (Backward Citations)
US2425231A
Cited
US3138515A
Cited
US3647525A
Cited
US3309224A
Cited
US3386822A
Cited
US3418656A
Cited
US3418250A
Cited
US3468700A
Cited
US3632296A
Cited
US3660304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |