Menstrual and incontinence pad

• US 4,758,241 A
• Filed: 06/18/1987
• Issued: 07/19/1988
• Est. Priority Date: 06/18/1987
• Status: Expired due to Term

• Current Assignee: Elissa D. Papajohn
• Original Assignee: Elissa D. Papajohn
• Inventors: Papajohn, Elissa D.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US07/063,413
• Time in Patent Office: 397 Days
• Field of Search: 604/385.1, 604/385.2, 604/386, 604/387, 604/380, 604/375, 604/389, 604/390, 604/397, 604/398, 604/391
• US Class Current: 604/387
• CPC Class Codes: A61F 13/4704 having preferential bending zones, e.g. fold lines or grooves
• CPC Class Codes: A61F 13/471 specially adapted for male use
• CPC Class Codes: A61F 13/472 specially adapted for female use A61F13/474, A61F13/475, A61F13/476 take precedence
• CPC Class Codes: A61F 13/47245 with asymmetry around the x or y axis
• CPC Class Codes: A61F 13/4753 the barrier being not integral with the topsheet or backsheet
• CPC Class Codes: A61F 13/511 Topsheet, i.e. the permeable cover or layer facing the skin
• CPC Class Codes: A61F 2013/15878 by thermal bonding
• CPC Class Codes: A61F 2013/4512 folded in special shape during use A61F13/534, A61F13/551, A61F13/56, A61F13/15747 take precedence
• CPC Class Codes: A61F 2013/49031 being elastic in longitudinal direction
• CPC Class Codes: A61F 2013/49074 hourglass; dog bone-shaped
• CPC Class Codes: A61F 2013/530883 having folds
• CPC Class Codes: A61F 2013/53966 by needling, sewing, blow-needling
• CPC Class Codes: A61F 2013/587 on rear or front tabs

Abstract

A sanitary napkin is formed of a plurality of vertically stacked layers comprising an underply of fluid impervious material, an intermediate ply of absorbent material, an underply of fluid impervious material and a peripheral binding ply of fluid impervious material having an inner and outer peripheral edge and defining a central opening into the body. The plies are adhered together about their outer peripheral edge and include an elastomeric member along each of the longitudinal side edges of the body, which resiliently contracts the body in the longitudinal direction drawing the body into a cup shape providing a deep compartment for retaining fluid between the underply and the intermediate ply and at the same time, raising the inner peripheral edge of the binding ply to form a continuous encircling wall against the flow of fluid from the compartment.

Claims

1. A sanitary napkin having a substantially oblong body formed of a plurality of vertically stacked layers comprising an underply of fluid impervious material, an intermediate ply of absorbent material, an upperply of highly fluid pervious material, said intermediate ply being secured along uniformly spaced parallel lines so as to provide, in cross-section, a corrugated effect from which separate chambers are formed between the intermediate ply and said underply to minimize lateral flow of fluid, and a peripheral binding ply of fluid impervious material having an inner and outer peripheral edge and defining a central opening into the body, the body having one end larger than the other in the lateral direction such that, in plan view, the body generally resembles a figure eight configuration, said underply integrally formed with two planar projections one of which extends from the front edge of the last-mentioned ply and the other of which extends from the rear edge of such ply thus to define forward facing and rearward facing planar tabs that are aligned along the longitudinal axis of the body, each of said tabs including pressure sensitive adhesive means detachably to secure the same to an undergarment, said adhesive means including a removable protective cover, said plies being secured together about their outer peripheral edge and including an elastomeric member along each of the longitdudinal side edges of the body, which resiliently contracts the body in the longitudinal direction drawing the body in to a cup shape providing a deep compartment for retaining fluid between said underply and said intermediate ply and at the same time, raising the inner peripheral edge of said binding ply to form a continuous encircling wall against the flow of fluid from the compartment.