US4985302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable self-adhesive sheet with writable surface
Assignee: Incas Holding SpA
•
Filing: 1988-06-03
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Granted: 1991-01-15
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Expires: 2008-06-03
Abstract
Abstract A removable self-adhesive sheet with a writable surface, for application to written surfaces to and from which it can be repeatedly applied and removed a large number of times always maintaining good adhesion but without compromising the written surface.
Inventors
- 👤 Guido Sala
- 👤 Ivano Zucchiatti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:04
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/28; Y10T428/2843; Y10T428/2848; Y10T428/2852; Y10T428/2857; Y10T428/2861; Y10T428/2878
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
104 words
A removable self-adhesive sheet with a writable surface comprising a support consisting of a polymer film, wherein the support has a first face at least partially covered with an adhesive having a low adhesiveness value, a second face, and an ink applied on said second face, said ink having the following chemical composition: ______________________________________
pigment 30 to 37% by weight,
vinyl or acrylic resin
9 to 15% by weight,
synthetic wax 0.3 to 1% by weight,
epoxide stabilizer
0.4% by weight,
phthalic acid esters
4 to 5% by weight,
ethyl acetate 38 to 55% by weight, and
ethanol 9 to 11% by weight.
______________________________________
Claim 2
Dependent Claim
104 words
A removable self-adhesive sheet with a writable surface comprising a support consisting of a polymer film, wherein the support has a first face at least partially covered with an adhesive having a low adhesiveness value, a second face, and an ink applied on said second face, said ink having the following chemical composition: ______________________________________
pigment 30 to 37% by weight,
vinyl or acrylic resin
9 to 15% by weight,
synthetic wax 0.3 to 1% by weight,
epoxide stabilizer
0.4% by weight,
phthalic acid esters
4 to 5% by weight,
ethyl acetate 38 to 55% by weight, and
ethanol 9 to 11% by weight.
______________________________________
Claim 3
Dependent Claim
28 words
A sheet according to claim 1, wherein the polymer film is selected from the group consisting of poly-vinylchloride, poly-propylene, cellulose acetate, polyester, cellophane, high-density poly-ethylene or polyolefin coextrusion.
Claim 4
Dependent Claim
33 words
A sheet according to claim 1, wherein the adhesive has the low adhesiveness value of from 30 to 70 gram/linear centimeter when evaluated by a dynamometer for removal from type Rizla cigarette paper.
Claim 5
Dependent Claim
35 words
A sheet according to claim 1, wherein the adhesive has the following chemical composition: ______________________________________
natural rubber 65-75% by weight,
hydrocarbon resins
25-35% by weight,
polyisobutylene 0-10% by weight, and
polybutenes 0-10% by weight.
______________________________________
Claim 6
Dependent Claim
38 words
A sheet according to claim 1, wherein the adhesive consists of a removable synthetic adhesive mixture selected from the group consisting of water-dispersion acrylic resins, self-crosslinking solution acrylic resins, synthetic rubbers and their dispersions, and self-adhesive polyurethane mixtures.
Claim 7
Dependent Claim
19 words
A sheet according to claim 1, wherein the adhesive is anchored to the polymer film by a anchoring layer.
Claim 8
Dependent Claim
18 words
A sheet according to claim 1, wherein the adhesive is anchored to the polymer film by surface treatment.
Claim 9
Dependent Claim
25 words
A sheet according to claim 1, wherein the adhesive is applied to the polymer film in a quantity of 12-15 g/m 2 of surface area.
Claim 10
Dependent Claim
24 words
A sheet according to claim 1, wherein the ink is applied in a quantity of between 1 and 10 g/m 2 of surface area.
Claim 11
Dependent Claim
24 words
A sheet according to claim 1, wherein a layer of coloured ink is applied as an intermediate layer between said film and said adhesive.
Claim 12
Dependent Claim
21 words
A sheet according to claim 1, which is in the form of a continuous sheet packaged into rolls of any width.
Claim 13
Dependent Claim
16 words
A sheet according to claim 1, which is of a size suitable for writing a message.
Claim 14
Dependent Claim
9 words
A sheet according to claim 1, which is colored.
Claim 15
Dependent Claim
165 words
A removable self-adhesive sheet with a writable surface comprising a support consisting of a film of a polymer selected from the group consisting of poly-vinylchloride, poly-propylene, cellulose acetate, polyester, cellophane, high-density poly-ethylene, wherein the support has one face at least partially covered with an amount of from 12 to 15 gram/square meter of an adhesive having an adhesiveness value of from 30 to 70 gram/linear centimeter when evaluated by a dynamometer for removal from cigarette paper, type Rizla, and a second face treated so as to be capable of being written upon by applying on it a an amount of from 1 to 10 gram/square meter of surface of an ink having the following chemical composition: pigment (30 to 37% by weight), vinyl or acrylic resin (9 to 15% by weight), synthetic wax (0.3 to 1% by weight), epoxide stabilizer (0.4% by weight), phthalic acid esters (4 to 5% by weight), ethyl acetate (38 to 55% by weight), and ethanol (9 to 11% by weight).
Claim 16
Dependent Claim
165 words
A removable self-adhesive sheet with a writable surface comprising a support consisting of a film of a polymer selected from the group consisting of poly-vinylchloride, poly-propylene, cellulose acetate, polyester, cellophane, high-density poly-ethylene, wherein the support has one face at least partially covered with an amount of from 12 to 15 gram/square meter of an adhesive having an adhesiveness value of from 30 to 70 gram/linear centimeter when evaluated by a dynamometer for removal from cigarette paper, type Rizla, and a second face treated so as to be capable of being written upon by applying on it a an amount of from 1 to 10 gram/square meter of surface of an ink having the following chemical composition: pigment (30 to 37% by weight), vinyl or acrylic resin (9 to 15% by weight), synthetic wax (0.3 to 1% by weight), epoxide stabilizer (0.4% by weight), phthalic acid esters (4 to 5% by weight), ethyl acetate (38 to 55% by weight), and ethanol (9 to 11% by weight).
Claim 17
Dependent Claim
35 words
A sheet according to claim 14, wherein the adhesive has the following chemical composition: ______________________________________
natural rubber 65-75% by weight,
hydrocarbon resins
25-35% by weight,
polyisobutylene 0-10% by weight, and
polybutenes 0-10% by weight.
______________________________________
Claim 18
Dependent Claim
38 words
A sheet according to claim 14, wherein the adhesive consists of a removable synthetic adhesive mixture selected from the group consisting of water-dispersion acrylic resins, self-crosslinking solution acrylic resins, synthetic rubbers, synthetic rubber dispersions, and self-adhesive polyurethane mixtures.
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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |