US3750962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disintegration process for fibrous sheet material
Assignee: Procter and Gamble Co
•
Filing: 1971-09-22
•
Granted: 1973-08-07
•
Expires: 1991-09-22
Abstract
Abstract A process for continuously converting dried cellulosic fibrous sheet material into a dispersion of individual fibers in air. The fibrous sheet is advanced into a disintegrating device wherein the end of the sheet is repeatedly impacted at a predetermined velocity by one or more impacting elements at a critical distance from the support elements for the sheet. The fibrous sheet is entirely disintegrated into individual fibers at relatively high rates.
Inventors
- 👤 G Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:57
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
The process of claim 1 wherein the velocity of said tips is at least about 12,000 feet per minute.
Claim 2
Dependent Claim
24 words
The process of claim 1 wherein the distance from the sheet support to said tips is from about 0.027 in. to about 0.033 in.
Claim 3
Dependent Claim
27 words
The process of claim 3 wherein the cellulosic sheet material is fed into the disintegrator at a rate of from about 30 fpm to about 100 fpm.
Claim 4
Dependent Claim
25 words
The process of claim 4 wherein the dried cellulosic material is a drylap having a thickness of from about 0.04 in. to about 0.06 in.
Claim 5
Dependent Claim
25 words
The process of claim 3 wherein the dried cellulosic material is a drylap having a thickness of from about 0.04 in. to about 0.06 in.
Claim 6
Dependent Claim
18 words
The process of claim 6 wherein the moisture content of the drylap is less than about 7 percent.
Claim 7
Dependent Claim
19 words
The process of claim 3 wherein the velocity of said tips is less than about 30,000 feet per minute.
Claim 8
Dependent Claim
18 words
The process of claim 3 wherein the moisture content of the drylap is less than about 7 percent.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |