Non-stretching wound dressing and method for making same

• US 6,350,339 B1
• Filed: 03/02/1995
• Issued: 02/26/2002
• Est. Priority Date: 03/01/1985
• Status: Expired due to Fees

• Current Assignee: Sessions Pharmaceuticals Inc.
• Original Assignee: Ferris Pharmaceuticals Incorporated
• Inventors: Sessions, Robert W.
• Primary Examiner(s): Osele, Mark A.
• Application Number:
  US08/397,536
• Time in Patent Office: 2,553 Days
• Field of Search: 156/250, 156/301, 156/324, 156/519, 156/552, 535/20, 535/53
• US Class Current: 156/250
• CPC Class Codes: A61F 13/023 wound covering film layers without a fluid retention layer
• CPC Class Codes: A61F 2013/00544 form or structure
• CPC Class Codes: A61F 2013/00748 with hydrocolloids or superabsorbers
• CPC Class Codes: A61F 2013/0077 arranged in lines
• CPC Class Codes: A61F 2013/00774 arranged in discrete dots
• CPC Class Codes: A61F 2013/008 easy removing of the protection sheet
• 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 2013/00876 vapour permeability >500 g/mg/24h
• CPC Class Codes: A61F 2013/00885 impervious, i.e. occlusive bandage
• CPC Class Codes: A61F 2013/00897 package for individual plaster
• CPC Class Codes: A61F 2013/00906 for transcutaneous or transdermal drugs application
• CPC Class Codes: A61F 2013/0091 with disinfecting or anaesthetics means, e.g. anti-mycrobic
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing
• CPC Class Codes: Y10T 156/1095 Opposed laminae are running length webs
• CPC Class Codes: Y10T 156/133 Delivering cut part to indefinite or running length web
• CPC Class Codes: Y10T 156/1734 Means bringing articles into association with web
• CPC Class Codes: Y10T 428/3158 Halide monomer type [polyvinyl chloride, etc.]

Abstract

A non-stretchable wound dressing has a flexible, non-stretching cover sheet having adhesive on one side thereof, and having two spaced strip-form gripping tabs at opposite ends thereof. The cover sheet covers a urethane wound dressing with the adhesive of the cover sheet being in contact with the urethane, and the urethane having an adhesive layer on an opposite side thereof. For storage and prior to application to a patient, the adhesive of the urethane wound dressing is in contact with a releasable surface of a carrier, such as cardboard. For application to a patient, one of the cover sheet gripping tabs is pulled so as to release the cover sheet and wound dressing from the carrier, the cover sheet preventing stretching of the wound dressing. The combination is then applied to a patient, again the cover sheet preventing stretching of the wound dressing. The other gripping tab of the cover sheet is then pulled to separate the cover sheet from the wound dressing, leaving the wound dressing on the patient with no stretching thereof. The first and second tabs may contain a patient binding adhesive layer to allow use of the cover sheet as an occluding wound dressing. A method for the continuous production of a series of such wound dressings permits all components thereof to be fed from rollers, with no alignment or stamping in registry being necessary, thereby greatly increasing the speed and decreasing the cost per unit of the wound dressing.

Claims

1. A method for continuously packaging an individual wound dressing cut from a continuous wound dressing product web within a package top and package bottom, the method comprising:

(a) continuously supplying a first continuous web at a first non-intermittent feed rate to provide the package bottom,

(b) cutting the continuous wound dressing product web into an individual wound dressing and continuously feeding at a second non-intermittent feed rate the wound dressing directly onto the first continuous web and laying the wound dressing onto the first continuous web, wherein the first feed rate is greater than the second feed rate and provides for successive cut wound dressings to be spaced from each other along the direction of travel of the first continuous web,

(c) continuously applying a second continuous web at a third non-intermittent feed rate onto the wound dressing and the first continuous web to provide the package top,

(d) continuously sealing the first and second continuous webs on at least three sides surrounding one wound dressing at two sealing stations while the continuous webs are moving at the first and third feed rates to form the package, and

(e) continuously severing the sealed continuous webs in the space between two successive wound dressings to provide a package containing an individual wound dressing which is sealed on at least three sides of the product while the sealed continuous webs are moving at the first and third feed rates,

wherein the wound dressing can be removed from the sealed package after the package is opened without damaging the product.

2. The method of claim 1, wherein said wound dressing comprises a wound dressing and a non-stretching cover sheet contacting the wound dressing.

3. The method of claim 2, wherein the wound dressing has an adhesive layer and said wound dressing includes a carrier having a releasable surface in contact with the adhesive layer of the wound dressing.

4. The method of claim 2, wherein the wound dressing is a urethane wound dressing.