US3710420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming themain body of a catamenial tampon
Assignee: Individual
•
Filing: 1970-07-10
•
Granted: 1973-01-16
•
Expires: 1990-07-10
Abstract
Abstract A wad of fibrous material provided with a pulling string and a stem inserted therein with its one end projected outward is first compressed from opposite sides by a pair of side dies and then compressed from the front and rear by a pair of transverse dies so as to obtain a cylindrical main body of a tampon. By carrying out these two steps of compression separately, the fibrous body obtained, when used, can be swollen into an elliptical or spindlelike shape in fitting contact with the vagina.
Inventors
- 👤 A Yamauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/2051; A61F13/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
302 words
A method for forming a cylindrical main body of a tampon comprising the steps of: longitudinally folding a fibrous material into a roll-shaped fibrous wad; positioning within the center of said wad a longitudinal stem having an elliptical cross section such that one end thereof projects outwardly from said wad; positioning said wad in a forming apparatus comprising a pair of substantially flat surfaced side dies disposed in facing relationship with each other, a pair of transverse dies each having a concave recess of a semicircular cross section disposed in facing relationship with each other transverse to said side dies, and upper and lower pressing dies one of which has on an inner surface thereof a semispherical recess and the other of which has therethrough a hole dimensioned to receive said stem, said wad being positioned within said apparatus such that the longer diameter sides of said elliptically cross sectioned stem are parallel with the substantially flat surfaces of said side dies; performing a first compressing step on said wad by moving said side dies against opposite surfaces thereof; performing a second compressing step on the once compressed wad by moving said transverse dies against the front and rear surfaces of said wad, thereby forming a cylindrical fibrous body by the pressing contact of said transverse dies, said second compressing step compressing said wad more densely between said stem and said transverse dies than between said stem and said side dies; performing a third compressing step on said cylindrical fibrous body by moving upper and lower pressing dies toward each other and against said body in the axial direction thereof; and removing said stem from said thrice compressed wad; thereby providing a hole of elliptical cross section in said compress wad; thereby forming a cylindrical tampon which will swell elliptically during use.
Claim 2
Independent Claim
302 words
A method for forming a cylindrical main body of a tampon comprising the steps of: longitudinally folding a fibrous material into a roll-shaped fibrous wad; positioning within the center of said wad a longitudinal stem having an elliptical cross section such that one end thereof projects outwardly from said wad; positioning said wad in a forming apparatus comprising a pair of substantially flat surfaced side dies disposed in facing relationship with each other, a pair of transverse dies each having a concave recess of a semicircular cross section disposed in facing relationship with each other transverse to said side dies, and upper and lower pressing dies one of which has on an inner surface thereof a semispherical recess and the other of which has therethrough a hole dimensioned to receive said stem, said wad being positioned within said apparatus such that the longer diameter sides of said elliptically cross sectioned stem are parallel with the substantially flat surfaces of said side dies; performing a first compressing step on said wad by moving said side dies against opposite surfaces thereof; performing a second compressing step on the once compressed wad by moving said transverse dies against the front and rear surfaces of said wad, thereby forming a cylindrical fibrous body by the pressing contact of said transverse dies, said second compressing step compressing said wad more densely between said stem and said transverse dies than between said stem and said side dies; performing a third compressing step on said cylindrical fibrous body by moving upper and lower pressing dies toward each other and against said body in the axial direction thereof; and removing said stem from said thrice compressed wad; thereby providing a hole of elliptical cross section in said compress wad; thereby forming a cylindrical tampon which will swell elliptically during use.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |