Patent US3596840A successfully refreshed from Google Patents.
US3596840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for disintegrating dry cellulose pulp
Assignee: Mo och Domsjo AB
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Filing: 1967-08-14
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Granted: 1971-08-03
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Expires: 1987-08-14
Abstract
Abstract A process is provided for producing disintegrated (fluffed) dry cellulose fibers from baled cut pulp sheets for use in products such as diapers, absorbent pads and rolls, and the like. The sheets are shredded into particles and subsequently fed in a carrier gas stream to a disc mill with a gap width within the range of 0.1 to about 0.5 mm. wherein the shredded particles are milled until disintegrated and the fibers liberated. The fibers are then removed by the gas stream.
Inventors
- 👤 Nils Verner Blomqvist
- 👤 Ingemar Liss-Albin Croon
- 👤 Lars Goran Eriksson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/066
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
A process in accordance with claim 1, in which the width of the gap is within the range from about 0.5 to about 3 mm.
Claim 2
Dependent Claim
29 words
A process in accordance with claim 1, in which the rate of rotation of the rotating milling disk is within the range from about 500 to about 2000 r.p.m.
Claim 3
Dependent Claim
26 words
A process in accordance with claim 1, in which the pulp is shredded in a hammer-type mill having hammer-shaped milling means operating against a fixed strainer.
Claim 4
Dependent Claim
29 words
A process in accordance with claim 4 in which the shredded pulp particles are strained through openings within the range from about 1 to about 5 cm. in width.
Claim 5
Dependent Claim
22 words
A process in accordance with claim 1 in which the dry content of the pulp is at least 93 percent by weight.
Claim 6
Dependent Claim
26 words
A process in accordance with claim 1 in which the milling disks are provided with milling means in the form of substantially radial bars or projections.
Claim 7
Dependent Claim
17 words
A process in accordance with claim 1 in which the pulp is shredded in a pin-type mill.
Claim 8
Dependent Claim
26 words
A process in accordance with claim 1, in which the milling disks are provided with milling means in the form of substantially transverse bars or projections.
Claim 9
Dependent Claim
28 words
A process in accordance with claim 1, in which the milling disks are provided with milling means in the form of substantially radial and transverse bars or projections.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |