Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Reexamination Certificate
2000-10-02
2003-07-22
Ruhl, Dennis (Department: 3761)
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
C604S904000
Reexamination Certificate
active
06595974
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to an improved tampon or tampon pledget. More particularly, the present invention relates to a tampon pledget that expands rapidly when ejected from a tampon applicator, without the need for the tampon pledget contacting moisture or menses. Furthermore, the tampon pledget may have an inverted coverstock. Overall, the tampon pledget has improved comfort and good absorbency.
2. Description of the Prior Art
Tampon pledgets are typically compressed and set during either manufacture or placement of the pledget in a tampon applicator prior to use. In conventional tampon pledgets, the pledget's fibers will expand significantly upon initial contact with moisture, or menses once placed in a user's body. During expansion, the tampon pledget would conform to the user's body contours. Heretofore, it was thought that the tampon pledget needed to be ejected from the applicator and positioned within the user's body before expansion in order to achieve comfort.
Non-absorbent fibers have been used in a tampon pledget to provide expansion to the pledget. However, such tampon pledgets have not achieved the unexpected comfort of the tampon pledget of the present invention. Frankly, one would not think to improved comfort, and have comparable absorbency and sufficient bypass leakage protection, in a tampon pledget by combining non-absorbent and absorbent fibers. In addition, there has been a lack of appreciation that the correct ratio of non-absorbent fibers to absorbent fibers, including conventional absorbent fibers, provides improved comfort, and absorbency that is as good or better than known tampon pledgets.
In addition, the coverstock cylinder that encloses the absorbent material in a conventional tampon pledget typically does not totally enclose the absorbent material, leaving the absorbent material exposed at the ends of the tampon pledget. However, it is advantageous to totally enclose the absorbent material of the tampon pledget with the coverstock cylinder to ensure that the absorbent material remains intact. Therefore, the ends of the coverstock cylinder are gathered and bonded by means such as adhesive, heat, or ultrasonics, which result in hard seal bond areas. This hardness can be uncomfortable, especially during insertion and removal of the tampon pledget, where the hard seal bond areas may rub against the vulva-vaginal canal.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a tampon pledget that expands rapidly without the aid of moisture or menses.
It is another object of the present invention to provide such a tampon pledget that has improved comfort, and comparable or better absorbency, than known tampon pledgets.
It is still another object of the present invention to provide such a tampon pledget that has a plurality of non-absorbent materials and a plurality of absorbent materials.
It is a further object of the present invention to provide such a tampon pledget in which the plurality of non-absorbent and absorbent materials are distributed together in the pledget, or blended together in a certain percent ratio.
It is yet a further object of the present invention to provide such a tampon pledget that may have a coverstock.
It is still a further object of the present invention to provide such a coverstock that is inverted, or turned inside out.
These and other objects of the present invention will be appreciated from a tampon pledget that will expand without the aid of moisture or menses. The pledget comprises a plurality of non-absorbent materials, and a plurality of absorbent materials that are distributed or mixed with the plurality of non-absorbent materials. The tampon pledget preferably has all of its absorbent and non-absorbent materials enclosed in a coverstock. The coverstock may be inverted, or turned inside out, prior to filling the coverstock with a plurality of absorbent and non-absorbent materials.
The plurality of non-absorbent materials can be made from ribbon, cut film, high resiliency fibers, and combinations thereof. The plurality of absorbent materials can be made from powders, polymer beads, particulates, cellulosic fibers, superabsorbents, and combinations thereof.
REFERENCES:
patent: 1884089 (1932-10-01), Millner
patent: 2330257 (1943-09-01), Bailey
patent: 2391343 (1945-12-01), Popper
patent: 2499414 (1950-03-01), Rabell
patent: 2884925 (1959-05-01), Meynier, Jr.
patent: 3431909 (1969-03-01), Krusko
patent: 3674025 (1972-07-01), Bleuer
patent: 3706311 (1972-12-01), Kokx et al.
patent: 3731687 (1973-05-01), Glassman
patent: 3738364 (1973-06-01), Brien et al.
patent: 3749094 (1973-07-01), Duncan
patent: 3762413 (1973-10-01), Hanke
patent: 3812856 (1974-05-01), Duncan et al.
patent: 3815601 (1974-06-01), Schaefer
patent: 3834389 (1974-09-01), Dulle
patent: 3981305 (1976-09-01), Ring
patent: 3986511 (1976-10-01), Olofsson et al.
patent: 4018225 (1977-04-01), Elmi
patent: 4200101 (1980-04-01), Glassman
patent: 4211225 (1980-07-01), Sibalis
patent: 4212301 (1980-07-01), Johnson
patent: 4216772 (1980-08-01), Tsuchiya
patent: 4266546 (1981-05-01), Roland et al.
patent: 4300561 (1981-11-01), Kaczmarzyk et al.
patent: 4335721 (1982-06-01), Matthews
patent: 4341214 (1982-07-01), Fries et al.
patent: 4377615 (1983-03-01), Suzuki et al.
patent: 4475911 (1984-10-01), Gellert
patent: 4543098 (1985-09-01), Wolfe et al.
patent: 4627849 (1986-12-01), Walton et al.
patent: 4675217 (1987-06-01), Forsman
patent: 4714466 (1987-12-01), Dohzono et al.
patent: 4787895 (1988-11-01), Stokes et al.
patent: 5153971 (1992-10-01), Van Iten
patent: 5231122 (1993-07-01), Palumbo et al.
patent: 5350371 (1994-09-01), Van Iten
patent: 5364383 (1994-11-01), Hayes et al.
patent: 5476455 (1995-12-01), Silber
patent: 5542914 (1996-08-01), Van Iten
patent: 5566435 (1996-10-01), Brown, Jr.
patent: 5659934 (1997-08-01), Jessup et al.
patent: 5755906 (1998-05-01), Achter et al.
patent: 5795346 (1998-08-01), Achter et al.
patent: 5817077 (1998-10-01), Foley et al.
patent: 6039716 (2000-03-01), Jessup et al.
patent: 0 062 948 (1982-10-01), None
Brown Jeffrey
Butensky Irwin
Jackson Dane R.
Pauley Suzanne M.
Ohlandt Greeley Ruggiero & Perle LLP
Playtex Products Inc.
Ruhl Dennis
LandOfFree
Rapid expansion tampon pledget does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rapid expansion tampon pledget, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapid expansion tampon pledget will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3035316