Sanitary napkin

• US 4,340,058 A
• Filed: 12/05/1980
• Issued: 07/20/1982
• Est. Priority Date: 12/05/1980
• Status: Expired due to Term

• Current Assignee: June S. Pierce, Larry L. Pierce
• Original Assignee: June S. Pierce, Larry L. Pierce
• Inventors: Pierce, Larry L., Pierce, June S.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): SHEDD, CHARLES W
• Application Number:
  US06/213,233
• Time in Patent Office: 592 Days
• Field of Search: 128/270, 128/285, 128/287, 128/284, 128/290 R, 128/290 P, 128/290 B, 128/296, 128/DIG. 30
• US Class Current: 604/385.05
• CPC Class Codes: A61F 13/47218 with a raised crotch region, e.g. hump
• CPC Class Codes: A61F 13/5323 having absorbent material located in discrete regions, e.g. pockets
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61F 13/539 characterised by the connection of the absorbent layers with each other or with the outer layers
• CPC Class Codes: A61F 13/58 Adhesive tab fastener elements A61F13/5611, A61F13/5616, A61F13/66 take precedence
• CPC Class Codes: A61F 13/64 Straps, belts, ties or endless bands A61F13/5605, A61F13/5622, A61F13/66 take precedence
• CPC Class Codes: A61F 2013/15048 for protection against contamination, or protection in using body disinfecting wipes
• CPC Class Codes: A61F 2013/49085 with a multiplicity of rounded, i.e. spherical elements
• CPC Class Codes: A61F 2013/530481 having superabsorbent materials, i.e. highly absorbent polymer gel materials
• CPC Class Codes: A61F 2013/530802 characterized by the foam or sponge other than superabsorbent A61F2013/530649 takes precedence
• CPC Class Codes: A61F 2013/530992 in the form of string or ball instead of sheets
• CPC Class Codes: A61F 2013/53445 from several sheets
• CPC Class Codes: A61F 2013/5395 with thermoplastic agent, i.e. softened by heat
• CPC Class Codes: A61F 2013/582 with one strip on one place

Abstract

A plurality of elongate absorbent pads, each of approximately circular cross-section, are arranged parallel to one another in a pyramid shaped bundle, with a first layer of pads arranged in parallel, side-by-side relationship, the layers of pads above the first layer of pads arranged in side-by-side relationship and overlying the layer of pads next below at positions over the adjacent surfaces of adjacent ones of the pads in the layer next below. The pads are movable with respect to one another, a liquid pervious tubular sock surrounds and encloses the pads, a sheet of liquid impervious material substantially covers the bottom portion of the first layer of pads, and a layer of adhesive material is disposed on the bottom portion of the napkin for securing the napkin to an undergarment.

Claims

1. A sanitary napkin comprising a plurality of elongate absorbent pads arranged parallel to one another and in a bundle generally triangular in cross-section with a first layer of pads arranged in side-by-side relationship, a second layer of pads arranged in side-by-side relationship and each pad of the second layer of pads overlying the pads of the first layer of pads at positions over the adjacent surfaces of the adjacent ones of the pads in the first layer, and a third layer of pads comprising at least one pad overlying the pads in the second layer, a liquid pervious material surrounding all of said pads for holding the pads in an uncompressed bundled relationship with the pads movable longitudinally with respect to one another, a sheet of liquid impervious material substantially covering the bottom portion of the first layer of pads, and a layer of adhesive material disposed on the bottom portion of said napkin for securing said napkin to an undergarment, as a result of the napkin not being compressed said napkin being characterized by being bendable along its length with portions of some of the pads movable longitudinally with respect to others of the pads as the napkin is bent along its length whereby the napkin is placed in external contact with the female human body with the third layer of pads in aligned contact with the labia and with the other pads holding the third layer of pads in contact with the labia and bending the napkin along its length as necessary to conform to the curvature of the external surfaces of the anatomy adjacent to the labia.

2. The sanitary napkin of claim 1 and wherein each of said absorbent pads are approximately of circular shape across their lengths.

3. The sanitary napkin of claim 2 and wherein the first layer of pads comprises three pads, the second layer of pads comprises two pads and the third layer of pads comprises one pad, and the ends of the pads at each end of the napkin are formed approximately in a common plane which is sloped from the first layer of the pads at an acute angle inwardly of the napkin.

4. The sanitary napkin of claim 1 and wherein the pads of the first layer of pads are of a length different from the lengths of the pads of the other layers of pads.

5. The sanitary napkin of claim 1 and wherein the ends of some of the pads at one end of the napkin are staggered with respect to each other.

6. The sanitary napkin of claim 1 and wherein said liquid pervious material surrounding said pads comprises a length of tubular material with the pads positioned in and extending longitudinally along the length of tubular material.

7. The sanitary napkin of claim 1 and wherein said sheet of liquid impervious material is positioned between said first layer of pads and said liquid pervious material surrounding said pads.

8. The sanitary napkin of claim 1 and wherein said elongate absorbent pads each comprise a length of sheet material formed in a spiral roll, with each pad being substantially circular in cross-section.

9. A sanitary napkin comprising a plurality of elongate absorbent pads arranged parallel to one another in an elongated uncompressed bundle of approximately triangular cross-section, and a tubular wrapper of a liquid pervious material surrounding all of said pads and closed at its ends about said pads for maintaining the pads in a bundle, and as a result of the napkin not being compressed, portions of said pads are movable with respect to one another along the lengths of the pads and the napkin is bendable along its length when placed in external contact with the female human body with one of the pads aligned with and placed adjacent the labia and with the other pads holding the one pad adjacent the labia and with the napkin curved along its length as necessary to conform to the curvature of the external surfaces of the anatomy.

10. The sanitary napkin of claim 9 and wherein said elongate pads of said bundle are arranged in a pyramid with the first layer of pads arranged in side-by-side relationship, the layers of pads above the first layer of pads arranged in side-by-side relationship and overlying the layer of pads next below at positions over the adjacent surfaces of adjacent ones of the pads in the layer next below.

11. The sanitary napkin of claim 9 and further including a sheet of liquid impervious material substantially covering the bottom portion of the bundle of pads inside said tubular wrapper, and adhesive material disposed on the bottom portion of said napkin for securing said napkin to an undergarment.

12. The sanitary napkin of claim 11 and wherein the side portions of said sheet of impervious material are wrapped about a portion of the pads in the bottom portion of the bundle of pads.

13. The sanitary napkin of claim 9 and wherein the ends of the pads at one end of the napkin are staggered with respect to each other.