Patent US3956048A successfully refreshed from Google Patents.
US3956048A
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Method for the manufacturing of a disposable operation textile
Assignee: Suomen Vanutehdas-Finnwad Ltd Oy
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Filing: 1974-09-09
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Granted: 1976-05-11
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Expires: 1994-09-09
Abstract
Abstract A method for the manufacture of disposable operation textiles. In the method at least on first layer of a non-woven fibre fabric material is fastened onto at least one second similar layer so that the principal fibre orientations of the layers become at least approximately perpendicular to each other. Said second layer is coated with a heat-sealable layer of synthetic material so that said layer in molten state and under tension is allowed to flow onto the web of fibre fabric. Then the combination is cooled whereby an internal prestress is produced and fixed in the coating of synthetic material. Said second layer is applied onto the first layer such that the layer of synthetic material comes against said first layer and the layers are fastened to each other by heat compression so that heat sealing occurs.
Inventors
- 👤 Gunnar Nordgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:47
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/425; D04H1/4258; B; B32; B32B; B32B27/00; B32B27/12; A; A61; A61B; A61B46/00; B32B38/00; B32B38/0036; B32B38/004; B32B5/00; B32B5/02; B32B5/022; B32B7/00; B32B7/04; B32B7/12; D04H1/54; D04H1/559; D04H1/58; D04H1/60; A61F; A61F13/00; A61F13/00987; A61F13/00991; A61F13/00995; A61F13/15; A61F2013/15008; A61F2013/15048; A61F13/15203; A61F2013/15284; A61F2013/15292; A61F2013/15341; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F13/53; A61F13/534; A61F2013/53445; A61F13/539; A61F2013/5395; B32B2264/00; B32B2264/04; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/50; B32B2307/514; B32B2307/516; B32B2309/00; B32B2309/02; B32B2309/04; B32B2309/12; B32B2535/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
128 words
A method of manufacturing disposable textile sheets for surgical operations, which comprises the combination of the following steps: a. coating a side of a web of non-woven rayon fiber fabric, having the fibers thereof principally oriented in one direction, by extruding thereon a molten heat-sealable layer of synthetic material under tension selected from polyethylene and polypropylene; b. cooling said coated web to produce and fix in said layer an internal prestress; c. superimposing the coated side of said cooled coated web onto another web of non-woven rayon fiber fabric having the fibers thereof principally oriented in a direction substantially perpendicular to the orientation direction of the fibers of the coated web; and d. applying heat and compression to said superimposed webs whereby said webs are heat sealed together.
Claim 2
Independent Claim
128 words
A method of manufacturing disposable textile sheets for surgical operations, which comprises the combination of the following steps: a. coating a side of a web of non-woven rayon fiber fabric, having the fibers thereof principally oriented in one direction, by extruding thereon a molten heat-sealable layer of synthetic material under tension selected from polyethylene and polypropylene; b. cooling said coated web to produce and fix in said layer an internal prestress; c. superimposing the coated side of said cooled coated web onto another web of non-woven rayon fiber fabric having the fibers thereof principally oriented in a direction substantially perpendicular to the orientation direction of the fibers of the coated web; and d. applying heat and compression to said superimposed webs whereby said webs are heat sealed together.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1, characterized in that the heat-compression is carried out by means of a glue-cloth press.
Claim 4
Dependent Claim
32 words
A method as claimed in claim 1, characterized in that the compression force is 0.5 to 1.0 Kg/sq.cm, compression temperature 150° to 180°C, and duration of the compression 4 to 10 seconds.
Claim 5
Dependent Claim
37 words
A method as claimed in claim 1, characterized in that a patterned compression base is used in order to produce an initial patterning or initial wrinkledness at least on said cooled coated web of said textile sheet.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 4, characterized in that the compression base is a patterned rubber base.
Claim 7
Dependent Claim
16 words
A method as claimed in claim 4, characterized in that the compression base has waffle-iron patterning.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 4, characterized in that the compression base is a sack cloth.
Claim 9
Dependent Claim
33 words
A method as claimed in claim 7, characterized in that the warp density of the sack cloth is 2.3 per cm, the weft density 2.3 per cm, and the yarn number tex 300.
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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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |