US3665918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conformable adhesive sheet
Assignee: Johnson and Johnson
•
Filing: 1970-01-12
•
Granted: 1972-05-30
•
Expires: 1990-01-12
Abstract
Abstract This pressure-sensitive adhesive sheet of improved conformability and splitting resistance which may be advantageously employed, for example, as a surgical drape or used in tape form or as part of a surgical bandage comprises a flexible polyurethane foam web which is compressedly set to less than about 50 percent of its original thickness and has a splitting resistance of at least about 20 pounds per square inch, an extent of elasticity of at least about 110 percent and a 100 percent modulus of less than about 5 pounds per inch width. A porous pressure-sensitive adhesive is applied to at least portions of one side of the web and, in certain embodiments, a low-friction coating is applied to the other side. In other embodiments, a release coating which may also have a low coefficient of friction may be applied to enhance unwindability. As a tape, the product is advantageously applied to irregularly shaped portions of the body having varied and changeable conformability requirements, such as joint locations, particularly knuckles, elbows, knees and the like.
Inventors
- 👤 Julius A Lindquist
- 👤 George J Buese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
C; C08; C08J; C08J9/00; A; A61; A61F; A61F13/00; A61F13/02; A61F13/023; A61F13/0236; A61F13/0246; A61F13/025; A61F13/0253; A61F13/0276; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/26; A61L15/42; A61L15/425; A61L15/58; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/26; C08L; C08L75/00; C08L75/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512; Y10T428/24777; Y10T428/24793; Y10T428/24802; Y10T428/24942; Y10T428/2495; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249981; Y10T428/249982; Y10T428/249983; Y10T428/249984; Y10T428/26; Y10T428/266; Y10T428/28; Y10T428/2839; Y10T428/2843; Y10T428/31504; Y10T428/31551; Y10T428/31554
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
60 words
The conformable sheet of claim 1 wherein the web is impregnated with strengthening binder and, as a result of compression, the crossover junctions of the cell walls are fused, the impregnation and fusing being sufficient to achieve the resistance to splitting of at least about 20 pounds per square inch in a direction normal to the surface of the web.
Claim 2
Dependent Claim
20 words
A conformable sheet of claim 1 in which said adhesive is in the form of a porous pressure-sensitive adhesive coating.
Claim 3
Dependent Claim
17 words
The comformable sheet of claim 1 wherein said web is substantially uniformly compressed throughout the cross section.
Claim 4
Dependent Claim
55 words
The conformable sheet of claim 1 wherein portions of said web are substantially less compressed than other portions thereof, at least said former portions being impregnated with sufficient strengthening binder to achieve a resistance to splitting of at least about 20 pounds per square inch in a direction normal to the surface of the web.
Claim 5
Dependent Claim
13 words
The conformable sheet of claim 5 wherein said binder comprises an ionomer resin.
Claim 6
Dependent Claim
12 words
The conformable sheet of claim 5 wherein said binder comprises acrylic resin.
Claim 7
Dependent Claim
12 words
The conformable sheet of claim 5 wherein said binder comprises urethane polymer.
Claim 8
Dependent Claim
17 words
The conformable sheet of claim 3 including a low-coefficient-of-friction coating on the other side of said web.
Claim 9
Dependent Claim
22 words
The conformable sheet of claim 3 including a release coating on the other side of said web to impart improved unwindability characteristics.
Claim 10
Dependent Claim
31 words
The conformable sheet of claim 1 including a backsize on the other surface of said web whereby unwindability is enhanced and the coefficient of friction of the exposed surface is reduced.
Claim 11
Dependent Claim
31 words
The conformable sheet of claim 1 including a plastic film on the other surface of said web whereby unwindability is enhanced and the exposed surface has a reduced coefficient of friction.
Claim 12
Dependent Claim
14 words
The conformable sheet of claim 12 wherein said plastic film comprises porous polyethylene film.
Claim 13
Dependent Claim
25 words
The conformable sheet of claim 1 wherein the compressed polyurethane foam of said web comprises polyester polyurethane and said pressure-sensitive adhesive coating comprises acrylate adhesive.
Claim 14
Dependent Claim
28 words
The conformable sheet of claim 1 wherein at least peripheral portions of said web, after compression, have a thickness in the range of about 2 to 25 mils.
Claim 15
Dependent Claim
16 words
The conformable sheet of claim 15 in which said sheet is impregnated with a strengthening binder.
Claim 16
Dependent Claim
13 words
The conformable sheet of claim 15 in which said binder comprises ionomer resin.
Claim 17
Dependent Claim
13 words
The conformable sheet of claim 15 in which said binder comprises acrylic resin.
Claim 18
Dependent Claim
13 words
The conformable sheet of claim 15 in which said binder comprises urethane polymer.
Claim 19
Dependent Claim
37 words
The conformable sheet of claim 1 in tape form wherein edge portions have a thickness in the range of about 3 to 6 mils and inner portions thereof have a thickness substantially greater than said edge portions.
Claim 20
Dependent Claim
21 words
The conformable sheet of claim 1 in tape form including a pad adhered to a portion of said porous pressure-sensitive adhesive.
Claim 21
Dependent Claim
22 words
The conformable sheet of claim 21 wherein said pad has an extent of elasticity substantially the same as that of said web.
Claim 22
Dependent Claim
42 words
The conformable sheet of claim 1 wherein, as a result of compression, the crossover junctions of the cell walls of the web are fused to an extent sufficient to achieve the resistance to splitting of at least 20 pounds per square inch.
Claim 23
Dependent Claim
30 words
The conformable sheet of claim 1 wherein the web is impregnated with sufficient strengthening binder to achieve the resistance to splitting of at least about 20 pounds per square inch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |