US5064484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming and bonding fluff pads
Assignee: Paper Converting Machine Co
•
Filing: 1990-08-02
•
Granted: 1991-11-12
•
Expires: 2010-08-02
Abstract
Abstract A method of forming and bonding fluff pads for diapers and the like wherein both the steps of forming and bonding are performed on the same vacuum drum.
Inventors
- 👤 Grantland A. Craig
- 👤 Gary E. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15617; A61F13/15626
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
A method of developing an absorbent fluff pad for a diaper comprising: providing an annular drum having circumferentially-spaced pad-forming, formaminous pocket means in the peripheral surface thereof, flowing an air stream containing synthetic binder-equipped fluff fibers radially inwardly of said surface through a first sector of said drum to deposit said fiber sequentially in each pocket means while rotating said drum, heating air to a temperature above the melting point of said binder and flowing said heated air radially inwardly of said drum through a second sector subsequent in the direction of drum rotation to said first sector to thermally bond said synthetic binder to unify said fluff fibers, repeating said steps of depositing and heating and removing the pads from said drum.
Claim 2
Independent Claim
123 words
A method of developing an absorbent fluff pad for a diaper comprising: providing an annular drum having circumferentially-spaced pad-forming, formaminous pocket means in the peripheral surface thereof, flowing an air stream containing synthetic binder-equipped fluff fibers radially inwardly of said surface through a first sector of said drum to deposit said fiber sequentially in each pocket means while rotating said drum, heating air to a temperature above the melting point of said binder and flowing said heated air radially inwardly of said drum through a second sector subsequent in the direction of drum rotation to said first sector to thermally bond said synthetic binder to unify said fluff fibers, repeating said steps of depositing and heating and removing the pads from said drum.
Claim 3
Dependent Claim
19 words
The method of claim 1 including the step of flowing air through a third sector to cool said pads.
Claim 4
Dependent Claim
19 words
The method of claim 1 including the step of scarfing said pads before subjecting the same to heated air.
Claim 5
Dependent Claim
34 words
The method of claim 1 including the step of initially flowing an air stream of release material into a sector prior to said fist sector to provide a binder-free layer in said pocket means.
References Cited (Backward Citations)
US2544019A
Cited
US2714081A
Cited
US3501369A
Cited
US3619322A
Cited
US3939240A
Cited
US4201499A
Cited
US4540454A
Cited
US4592708A
Cited
US4666647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-11 | 1995-05-13 | 1995-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-11 | 1999-05-13 | 1999-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-11 | 2003-05-13 | 2003-11-12 | $7700.00 | Window Closed / Lapsed |