Patent US5169343A successfully refreshed from Google Patents.
US4097649A
Expired / Lapsed
US
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Resin-impregnated self-adhering or heat-sealable papers and method of making
Assignee: Roehm GmbH Darmstadt
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Filing: 1975-11-10
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Granted: 1978-06-27
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Expires: 1995-11-10
Abstract
Abstract Methods for making resin-impregnated self-adhering or heat-sealable papers by impregnating a raw absorbent paper with an aqueous dispersion of a self-cross-linking resin in which the average diameter of the resin particles is less than 2 microns and, in the same or in a separate step, applying an aqueous suspension of a thermoplastic resin to the paper surface which is to be self-adhering or heat-sealable, the average diameter of the thermoplastic resin particles being over 20 microns. Self-adhering or heat-sealable papers produced by these methods.
Inventors
- 👤 Helmut Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:43
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; B; B32; B32B; B32B21/00; B32B21/10; B32B15/00; B32B15/14; B32B21/02; B32B27/00; B32B27/12; B32B29/00; B32B29/02; B32B5/00; B32B5/02; B32B5/022; B32B5/024; B32B5/22; B32B5/24; B32B5/26; C09J7/205; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2878; Y10T428/2891
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
A method for making a synthetic resin-impregnated self-adhering or heat-sealable paper which comprises saturating an absorbent paper with an aqueous dispersion of a self-cross-linking synthetic resin, in which dispersion the resin particles have an average particle size of less than 2 microns, and, without drying, applying an aqueous suspension of a thermoplastic resin, in which suspension the resin particles have an average particle size of over 20 microns, to that side of the paper which is to be self-adhering or heat-sealable, and then drying said paper.
Claim 2
Independent Claim
86 words
A method for making a synthetic resin-impregnated self-adhering or heat-sealable paper which comprises saturating an absorbent paper with an aqueous dispersion of a self-cross-linking synthetic resin, in which dispersion the resin particles have an average particle size of less than 2 microns, and, without drying, applying an aqueous suspension of a thermoplastic resin, in which suspension the resin particles have an average particle size of over 20 microns, to that side of the paper which is to be self-adhering or heat-sealable, and then drying said paper.
Claim 3
Dependent Claim
23 words
A method as in claim 1 wherein said thermoplastic resin particles having a particle size of over 20 microns are a pearl polymer.
Claim 4
Dependent Claim
22 words
A method as in claim 1 wherein said thermoplastic resin particles having a particle size of over 20 microns are aggregated particles.
Claim 5
Dependent Claim
31 words
A method as in claim 1 wherein said paper is first saturated with said aqueous dispersion of a self-cross-linking resin and the aqueous suspension of a thermoplastic resin is subsequently applied.
Claim 6
Dependent Claim
29 words
A method as in claim 1 wherein said aqueous dispersion of a self-cross-linking resin additionally contains particles, less than 2 microns in average diameter, of a thermoplastic synthetic resin.
Claim 7
Dependent Claim
28 words
A method as in claim 4 wherein said aqueous suspension of thermoplastic resin additionally contains particles, less than 2 microns in average diameter, of a self-cross-linking synthetic resin.
Claim 8
Dependent Claim
91 words
A method as in claim 1 wherein said paper is concurrently saturated with said dispersion of a self-cross-linking synthetic resin and provided on one side thereof with a coating of said thermoplastic resin, which method comprises applying, to that side of the paper to be provided with a self-adhering or heat-sealable coating, an aqueous suspension containing both particles of a self-cross-linking synthetic resin, which particles have an average diameter less than 2 microns, and particles of a thermoplastic synthetic resin, which latter particles have an average diameter of over 20 microns.
Claim 9
Dependent Claim
12 words
A self-adhering or heat-sealable paper prepared by the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |