Transparent adhesive dressing with reinforced starter cuts

• US 5,437,622 A
• Filed: 04/22/1993
• Issued: 08/01/1995
• Est. Priority Date: 04/29/1992
• Status: Expired due to Fees

• Current Assignee: Laboratoire Hydrex
• Original Assignee: Laboratoire Hydrex
• Inventors: Carion, Jean-Pierre
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US08/051,484
• Time in Patent Office: 831 Days
• Field of Search: 602/41, 602/42, 602/57, 602/58, 602/59, 206/440, 206/441, 604/307, 604/304, 128/853, 128/854, 128/887, 128/888
• US Class Current: 602/57
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 2013/00553 with detachable parts
• CPC Class Codes: A61F 2013/00608 with reinforcing layers
• CPC Class Codes: A61F 2013/00812 perforate or breakable zones
• CPC Class Codes: A61F 2013/00817 handles or handling tabs
• CPC Class Codes: A61F 2013/00829 rigid or semi-rigid backing
• CPC Class Codes: A61F 2013/00846 with transparent or translucent part
• CPC Class Codes: A61F 2013/00868 thin film
• CPC Class Codes: A61F 2013/15073 as drapes

Abstract

A transparent adhesive dressing of synthetic material having reinforced starter cuts is disclosed. The dressing contains three layers, namely, a sheet of flexible film made of polyurethane having an adhesive face, a protective sheet of backing covering the adhesive face, and a sheet of less flexible material made of polyethylene. A starter cut passes through at least two of the three layers. The starter cut is protected by a reinforcing strip disposed on the sheet of the less flexible film.

Claims

1. A transparent adhesive dressing of synthetic material comprising

a first layer formed as a sheet of flexible film having an adhesive face and having a non-adhesive face;

a second layer forming a protective sheet backing covering said adhesive face;

a third layer formed as a sheet made of a less flexible material disposed on the non-adhesive face of the sheet of flexible film;

a first strip for grasping disposed at a first lateral edge of the sheet of flexible film, wherein the first strip for grasping adheres to the sheet of flexible film;

a second strip for grasping disposed at a second lateral edge of the sheet of flexible film, wherein the second strip for grasping adheres to the sheet of flexible film;

wherein a useful area of the transparent adhesive dressing is extending between the first strip for grasping and the second strip for grasping;

starter cuts passing through at least two of the three layers and disposed along the first lateral edge of the sheet of flexible film;

a reinforcing strip disposed on the sheet of less flexible film for protecting said starter cuts.

2. The transparent adhesive dressing of synthetic material according to claim 1, wherein a first side of the sheet of less flexible material extends no further than the starter cuts such that the reinforcing strip projects over said sheet of flexible film, wherein a bottom face of a projecting portion of the reinforcing strip is not adhesive.

3. The transparent adhesive dressing of synthetic material according to claim 1, wherein the sheet of flexible film of the first layer is made of polyurethane.

4. The transparent adhesive dressing of synthetic material according to claim 1, wherein the less flexible material forming the third layer is made of polyethylene.

5. A transparent adhesive dressing of synthetic material comprising

a sheet of flexible film having an adhesive face and having a non-adhesive face;

a protective sheet disposed adjacent to the sheet of flexible film and forming a backing covering said adhesive face;

a sheet made of a material, which is less flexible than a material employed for the sheet of flexible film and disposed on the non-adhesive face of the flexible film and wherein the sheet of flexible film, the protective sheet and the sheet made of a material, which is less flexible than the material employed for the sheet of flexible film, form a three layer structure;

a first strip for grasping attached to a first lateral edge of the three layer structure and adhering to the sheet of flexible film;

a second strip for grasping attached to a second lateral edge of the three layer structure and adhering to the sheet of flexible film wherein a useful area of the three layer structure extends between the first strip for grasping and the second strip for grasping;

a first set of starter cuts passing through at least two layers of the three layer structure , and wherein the first set of starter cuts delimits grasping at least on one of the first lateral side and of the second lateral side of the three layer structure forming the dressing; and

a reinforcing strip disposed on the sheet of less flexible film for protecting the area of the first set of starter cuts passing through at least two layers of the three layer structure.

6. The transparent adhesive dressing of synthetic material according to claim 5, wherein a first lateral side of the sheet of less flexible material extends no further than the first set of starter cuts such that the reinforcing strip projects over said sheet of less flexible material, a bottom face of the projecting portion of the reinforcing strip not being adhesive.

7. The transparent adhesive dressing of synthetic material according to claim 5,

wherein the sheet of flexible film is made of polyurethane;

wherein the sheet made of a material, which is less flexible than the material employed for the sheet of flexible film, is polyethylene.

8. The transparent adhesive dressing of synthetic material according to claim 5, wherein the protective sheet extends over the area of the first strip and of the second strip without adhering to the first strip and without adhering to the second strip.

9. The transparent adhesive dressing of synthetic material according to claim 5, wherein the sheet of flexible film, the protective sheet, the sheet made of a material, which is less flexible than the material employed for the sheet of flexible film, and a respective one of the first strip for grasping and of the second strip for grasping extend laterally to substantially the same respective lateral edge.

10. The transparent adhesive dressing of synthetic material according to claim 5, wherein the width of the reinforcing strip is smaller than the distance between the set of starter cuts and a respective neighboring edge of the flexible film.