PRESHAPED FEMININE NAPKIN

• US 3,805,790 A
• Filed: 05/12/1972
• Issued: 04/23/1974
• Est. Priority Date: 05/12/1972
• Status: Expired due to Term

• Current Assignee: Leonard M. Kaczmarzyk, Robert F. Skora
• Original Assignee: Leonard M. Kaczmarzyk, Robert F. Skora
• Inventors: Kaczmarzyk, Leonard M., Skora, Robert F.
• Primary Examiner(s): Rosenbaum, Charles F.
• Application Number:
  US05/252,599
• Time in Patent Office: 711 Days
• Field of Search: 128/284,285,286,287,290,296
• US Class Current: 604/369
• CPC Class Codes: A61F 13/47245 with asymmetry around the x or y axis
• CPC Class Codes: A61F 13/47272 with a longitudinal raised end, e.g. cup-shaped gluteal groove for edge leakage prevention A61F13/494
• CPC Class Codes: A61F 13/512 characterised by its apertures, e.g. perforations
• CPC Class Codes: A61F 13/51305 having areas of different permeability
• CPC Class Codes: A61F 13/537 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer A61F13/538 takes precedence
• CPC Class Codes: A61F 13/58 Adhesive tab fastener elements A61F13/5611, A61F13/5616, A61F13/66 take precedence
• CPC Class Codes: A61F 2013/51186 specially shaped topsheets
• CPC Class Codes: A61F 2013/51409 being a film
• CPC Class Codes: A61F 2013/53782 with holes
• CPC Class Codes: A61F 2013/582 with one strip on one place

Abstract

A feminine napkin of predetermined shape, dimensioned to conform particularly well to the perineal area of the female body over a wide range of anatomical sizes. The defined shape and dimensions enables the napkin to automatically position itself properly with respect to the body when worn while at the same time providing improved comfort. In addition, the napkin is substantially nondiscernible to the casual observer, even when worn in combination with tight-fitting garments. The napkin is also adapted for adhesive attachment to supporting garments.

Claims

1. An anatomy-conforming feminine napkin of predetermined shape and comprising a preshaped absorbent pad member, a fluid-pervious cover member, and a preformed fluid-impervious backing member;

said preshaped pad member when viewed in plan comprising an elongate generally biconcave pad having a major and a minor axis, the sides of said pad flanking said major axis being generally and symmetrically concave, and said minor axis being disposed perpendicular to said major axis at the narrowest point of biconcavity;

the dimension of said minor axis being in the range of about 1 1/4 inches to about 1 3/4 inches;

said concave sides being defined by a curve the segments of which have a radius of curvature of no less than 2 inches and no more than 4 inches, said curve being perpendicular to said minor axis at its intersection therewith, and the length of the chord which subtends said curve being from about 2 1/2 inches to 5 inches;

said impervious backing member comprising a preformed shallow basin into which said preshaped pad member is nested;

the fluid pervious cover member being of the same contoured outline in plan view as said pad member to overlie the entire top surface of said pad member;

said cover member being substantially planar;

the peripheral edges of said cover member extending slightly beyond the edges of said pad member and being secured to the top periphery of the walls defining the shallow basin formed by said backing member.

2. The feminine napkin of claim 1 wherein said concave curve is the arc of a circle.

3. The feminine napkin of claim 1 wherein said concave curve is elliptical.

4. The feminine napkin of claim 1 wherein the end portions of said pad member disposed on either side of said minor axis are of unequal width and length, the narrower and shorter of said end portions defining the rear end of the pad as worn, and wherein said pad member is thickest at said minor axis tapering to thinner portions at each end, being feathered at one end while being about one-half of the minor axis thickness at the other end, said latter end being the rear of said pad as worn, and said feathered end being the front of said pad as worn.

5. The feminine napkin of claim 1 wherein said cover member comprises a non-woven web of hydrophobic fibers.

6. The feminine napkin of claim 5 wherein said cover member is provided with spaced perforations.

7. The feminine napkin of claim 1 wherein said preformed fluid impervious backing member comprises a thin plastic film.

8. The feminine napkin of claim 1 wherein said preformed fluid impervious backing member comprises a thin plastic foam.

9. The feminine napkin of claim 8 wherein at least the bottom surface of said foam is a closed skin.

10. The feminine napkin of claim 1 wherein said napkin is adapted to be removably attached to a supporting garment by having pressure sensitive adhesive means disposed on said fluid-impervious backing member.