US4500040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating the components of cellulose sanitary articles
Assignee: Individual
•
Filing: 1982-06-10
•
Granted: 1985-02-19
•
Expires: 2002-06-10
Abstract
Abstract Sanitary articles formed of cellulose flock and non-flock carriers or covers are shredded by rotating entrainers, which are arranged in an enclosed housing. The cellulose flock thus separated is removed from the housing under suction through a sieve which only allow the cellulose flock through. The removal is effected before the covers have been shredded to such an extent that they pass through the sieve. The shredded cover material is then removed separately.
Inventors
- 👤 Bert Steffens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/02; D; D21; D21B; D21B1/00; D21B1/02; D21B1/026; D21B1/028; D21D; D21D1/00; D21D1/20; D21D1/32; B29B17/04; B29B17/0412; B29B2017/0213; B29B2017/0217; B29B2017/0224; B29K; B29K2001/00; B29L; B29L2031/00; B29L2031/48; B29L2031/4871; B29L2031/4878; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/52; Y02W30/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A process for separately recovering the flock and non-flock components in cellulose-based sanitary articles obtained as waste in the production of panties, diapers, sanitary towels, sick-bed undersheets, and the like, being a composite of cellulose flock and a non-flock carrier formed of plastic, cellulose or rubber sheets, tissues, adhesive tapes, rubber bands and the like, said process comprising the steps of: (a) delivering the sanitary articles into a chamber having a plurality of rotatable entrainers; (b) causing said entrainers to break up the sanitary articles so as to provide a mixture of loose cellulose flock and shredded non-flock carrier material; (c) removing under effect of a first suction source acting through a sieve the loose cellulose flock formed in said chamber prior to the time said non-flock carrier is shredded so finely that the carrier shreds pass through the sieve; and (d) removing under a second suction source acting in the chamber, the non-flock carrier shreds.
Claim 2
Dependent Claim
156 words
A process for separately recovering the flock and non-flock components in cellulose-based sanitary articles obtained as waste in the production of panties, diapers, sanitary towels, sick-bed undersheets, and the like, being a composite of cellulose flock and a non-flock carrier formed of plastic, cellulose or rubber sheets, tissues, adhesive tapes, rubber bands and the like, said process comprising the steps of: (a) delivering the sanitary articles into a chamber having a plurality of rotatable entrainers; (b) causing said entrainers to break up the sanitary articles so as to provide a mixture of loose cellulose flock and shredded non-flock carrier material; (c) removing under effect of a first suction source acting through a sieve the loose cellulose flock formed in said chamber prior to the time said non-flock carrier is shredded so finely that the carrier shreds pass through the sieve; and (d) removing under a second suction source acting in the chamber, the non-flock carrier shreds.
Claim 3
Dependent Claim
20 words
The process according to claim 1 wherein the shredded non-flock carrier material is removed from in front of said sieve.
Claim 4
Dependent Claim
44 words
The process according to claim 1, where the sanitary articles are delivered in successive batches to said chamber, and each batch is broken up and the flock cellulose and the shredded carrier material are removed from the chamber before the next batch is delivered.
Claim 5
Dependent Claim
64 words
The process according to claim 1, wherein the sanitary articles are fed in a continuous stream to one end of said chamber, transported through said chamber to the other end while being broken up and the shredded carrier material is continuously removed at the other end of the chamber whilst the cellulose flock is continuously removed in an intermediate zone between the two ends.
Claim 6
Dependent Claim
23 words
The process according to claim 1 including the step of passing said cellulose flock through a second sieve after removal from said chamber.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |