Patent US4115176A successfully refreshed from Google Patents.
US4115176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated paper product and a method for manufacturing said product
Assignee: Akerlund and Rausing AB
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Filing: 1974-10-17
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Granted: 1978-09-19
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Expires: 1994-10-17
Abstract
Abstract A laminated paper product having use as a disposable substitute for cloth produced from a layer of paper having a layer of plastic material by so controlling the attachment between the two layers that the resulting laminate is capable of being folded like a soft cloth.
Inventors
- 👤 Stig Ekstrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:42
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/32; B32B3/00; B32B3/26; B32B3/28; B32B7/00; B32B7/04; D; D21; D21H; D21H19/00; D21H19/10; D21H19/14; D21H19/20; D21H19/22; B32B2305/00; B32B2305/02; B32B2305/026; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
205 words
A method of producing a laminate of a web of porous paper and a layer of thermoplastic material in which the web of porous paper and layer of plastic material are joined at spaced areas to form a soft folding laminate comprising extruding a thermoplastic material in web form onto a smooth, rotating, cool roller, passing a web of porous paper onto the extruded layer of thermoplastic material on the cool roller at a point spaced from the point of contact of said layer of plastic material with the cool roller in the direction of rotation of the roller, passing the web of porous paper and layer of plastic material between the cool roller and a rotating profiled roller for pressing the web of porous paper and a layer of plastic material together at spaced areas determined by the profiled roller, the layer of extruded plastic material being cooled by the cool roller sufficiently to prevent substantial quantities of the plastic material of the layer from migrating entirely through the web of paper at the spaced areas while permitting partial penetration of the extruded plastic layer into the paper web to join the web of paper and layer of plastic material together at spaced areas.
Claim 2
Independent Claim
205 words
A method of producing a laminate of a web of porous paper and a layer of thermoplastic material in which the web of porous paper and layer of plastic material are joined at spaced areas to form a soft folding laminate comprising extruding a thermoplastic material in web form onto a smooth, rotating, cool roller, passing a web of porous paper onto the extruded layer of thermoplastic material on the cool roller at a point spaced from the point of contact of said layer of plastic material with the cool roller in the direction of rotation of the roller, passing the web of porous paper and layer of plastic material between the cool roller and a rotating profiled roller for pressing the web of porous paper and a layer of plastic material together at spaced areas determined by the profiled roller, the layer of extruded plastic material being cooled by the cool roller sufficiently to prevent substantial quantities of the plastic material of the layer from migrating entirely through the web of paper at the spaced areas while permitting partial penetration of the extruded plastic layer into the paper web to join the web of paper and layer of plastic material together at spaced areas.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1 wherein the spaced areas comprise parallel spaced lines extending longitudinally of the laminate web.
Claim 4
Dependent Claim
20 words
A method as claimed in claim 1 wherein the spaced areas comprise parallel spaced lines extending transversely of the laminate.
Claim 5
Dependent Claim
24 words
A method as claimed in claim 1 wherein the spaced areas comprise a grid of spaced lines extending transversely and longitudinally of the laminate.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 1 wherein the spaced areas comprise lines extending diagonally across the laminate.
Claim 7
Dependent Claim
42 words
A method as claimed in claim 1 wherein the spaced areas comprise a plurality of separate and distinct spaced areas arranged over the laminate, the total area of the distinct, spaced areas comprising about 5-50% of the total area of the laminate.
Claim 8
Dependent Claim
39 words
A method as claimed in claim 1 wherein the profiled roller is provided with a layer of silicone material to prevent any plastic material that may entirely penetrate the web of porous paper from adhereing to the profiled roller.
Claim 9
Independent Claim
166 words
A method of producing a laminate of a web of porous paper and a layer of thermoplastic material in which the web of porous paper and layer of thermoplastic material are joined at spaced areas to form a soft folding laminate comprising passing a web of porous paper into the nip between a cooling roller and a pressure roller while simultaneously extruding a layer of a thermoplastic material into the nip between the cooling roller and the web of porous paper, said pressure roller being profiled for pressing the web of porous paper against the layer of extruded thermoplastic material at spaced areas determined by the profiled roller, the temperature of the cooling roller being such that the layer of extruded thermoplastic material will become substantially non-fluent to a depth sufficient to prevent substantial quantities of the thermoplastic material from passing entirely through the web of porous paper while permitting partial penetration of the thermoplastic material into the web of porous paper at the spaced areas.
Claim 10
Independent Claim
166 words
A method of producing a laminate of a web of porous paper and a layer of thermoplastic material in which the web of porous paper and layer of thermoplastic material are joined at spaced areas to form a soft folding laminate comprising passing a web of porous paper into the nip between a cooling roller and a pressure roller while simultaneously extruding a layer of a thermoplastic material into the nip between the cooling roller and the web of porous paper, said pressure roller being profiled for pressing the web of porous paper against the layer of extruded thermoplastic material at spaced areas determined by the profiled roller, the temperature of the cooling roller being such that the layer of extruded thermoplastic material will become substantially non-fluent to a depth sufficient to prevent substantial quantities of the thermoplastic material from passing entirely through the web of porous paper while permitting partial penetration of the thermoplastic material into the web of porous paper at the spaced areas.
Claim 11
Dependent Claim
42 words
A method as claimed in claim 8 wherein the spaced areas comprise a plurality of separate and distinct spaced areas arranged over the laminate, the total area of the distinct, spaced areas comprising about 5-50% of the total area of the laminate.
Claim 12
Dependent Claim
39 words
A method as claimed in claim 8 wherein the profiled roller is provided with a layer of silicon material to prevent any thermoplastic material that may entirely penetrate the web of porous paper from adhering to the profiled roller.
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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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |