US4962072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure sensitive record material
Assignee: Arjo Wiggins Ltd
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Filing: 1987-12-17
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Granted: 1990-10-09
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Expires: 2007-12-17
Abstract
Abstract Record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of colour former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises a binder for the pigment together with a synthetic reactive sizing agent or a coating structure agent or both the sizing agent and the coating structure agent.
Inventors
- 👤 John B. Cooper
- 👤 Kevin J. Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:41
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/165
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
62 words
A record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises (a) a pigment, (b) a binder for the pigment and (c) at least one of (i) a sizing agent and (ii) a coating structure agent.
Claim 2
Dependent Claim
62 words
A record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises (a) a pigment, (b) a binder for the pigment and (c) at least one of (i) a sizing agent and (ii) a coating structure agent.
Claim 3
Dependent Claim
35 words
A record material according to claim 1 including the sizing agent, wherein said sizing agent is selected from at least one of an alkyl ketene dimer, an alkenyl succinic anhydride or other neutral reactive size.
Claim 4
Dependent Claim
19 words
A record material according to claim 1 including the sizing agent, wherein the sizing agent is a polyurethane size.
Claim 5
Dependent Claim
41 words
A record material according to claim 1 including the sizing agent, wherein the water repellency of the pigment coating, in terms of the contact angle taken up by a water droplet on the surface of the coated paper, is above 90°.
Claim 6
Dependent Claim
14 words
A record material according to claim 4, wherein the water repellency is above 100°.
Claim 7
Dependent Claim
21 words
A record material according to claim 1 including the coating structure agent, wherein the coating structure agent is a hydrophilic polymer.
Claim 8
Dependent Claim
27 words
A record material according to claim 6, wherein the hydrophilic polymer is selected from at least one of a carboxyl methyl cellulose, a protein or an alginate.
Claim 9
Dependent Claim
12 words
A record material according to claim 7, wherein the protein is soya.
Claim 10
Dependent Claim
16 words
A record material according to claim 1, wherein the binder is a synthetic rubber latex binder.
Claim 11
Dependent Claim
21 words
A record material according to claim 9, wherein the binder is a styrene butadiene binder or a styrene acrylic latex binder.
Claim 12
Dependent Claim
17 words
A record material according to claim 1, wherein the binder is a hydroxy alkyl ether starch derivative.
Claim 13
Dependent Claim
41 words
A record material according to claim 1, said pigment, from about 10 to about 30 parts by weight binder, from 0 to about 10 parts by weight sizing agent, and from 0 to about 5 parts by weight coating structure agent.
Claim 14
Dependent Claim
42 words
A record material according to claim 12, said material comprising, from about 60 to about 95 parts by weight pigment, from about 16 to about 22 parts by weight binder, and from about 0.5 to about 10 parts by weight sizing agent.
Claim 15
Dependent Claim
43 words
A record material according to claim 12, said material comprising from about 75 to about 85 parts by weight pigment, from about 12 to about 22 parts by weight binder and from about 0.5 to about 5 parts by weight coating structure agent.
Claim 16
Dependent Claim
54 words
A record material according to claim 12, said material comprising from about 75 to about 85 parts by weight pigment, from about 12 to about 22 parts by weight binder, from about 1 to about 5 parts by weight sizing agent, and from about 0.5 to about 5 parts by weight coating structure agent.
Claim 17
Dependent Claim
25 words
A record material according to claim 1, wherein the coat weight of the front coating is from about 2 to about 20 g/m 2 .
Claim 18
Dependent Claim
25 words
A record material according to claim 16, wherein the coat weight of the front coating is from about 3 to about 15 g/m 2 .
Claim 19
Dependent Claim
15 words
A record material according to claim 1, wherein the pigment comprises an inorganic particulate material.
Claim 20
Dependent Claim
12 words
A record material according to claim 18, wherein the pigment is mineral-derived.
Claim 21
Dependent Claim
13 words
A record material according to claim 18, wherein the pigment comprises calcium carbonate.
Claim 22
Dependent Claim
22 words
A record material according to claim 1, wherein the particle size of the pigment ranges from about 1 to about 10 microns.
Claim 23
Dependent Claim
22 words
A record material according to claim 21, wherein the particle size of the pigment ranges from about 2 to about 5 microns.
Claim 24
Dependent Claim
43 words
A record material according to claim 1 including the sizing agent, wherein the sizing agent is selected from an alkyl ketene dimer having a C 8 -C 24 alkyl group, or an alkenyl succinic anhydride having a C 8 -C 24 alkenyl group.
Claim 25
Dependent Claim
39 words
A record material according to claim 23, wherein the sizing agent is selected from an alkyl ketene dimer having a C 12 -C 24 alkyl group, or an alkenyl succinic anhydride having a C 12 -C 24 alkenyl group.
Claim 26
Dependent Claim
108 words
A multiple form set comprising a CB sheet and a CF sheet, wherein said CB sheet includes a record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises (a) a pigment, (b) a binder for the pigment, (c) a sizing agent operable to prevent separation of the sheets within the set upon fanning of the set, and optionally, (d) a coating structure agent, and wherein the sheets of the set carry an edge padding adhesive to join the sheets within the set.
Claim 27
Dependent Claim
108 words
A multiple form set comprising a CB sheet and a CF sheet, wherein said CB sheet includes a record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises (a) a pigment, (b) a binder for the pigment, (c) a sizing agent operable to prevent separation of the sheets within the set upon fanning of the set, and optionally, (d) a coating structure agent, and wherein the sheets of the set carry an edge padding adhesive to join the sheets within the set.
Claim 28
Dependent Claim
33 words
A multiple form set according to claim 25, further comprising at least one CFB sheet between said CB sheet and said CF sheet, wherein the CFB sheet(s) also carry the edge padding adhesive.
Claim 29
Dependent Claim
25 words
Multiple form sets comprising at least two multiple form sets according to claim 25, each set carrying an edge padding adhesive to join the sets.
Claim 30
Dependent Claim
25 words
Multiple form sets comprising at least two multiple form sets according to claim 26, each set carrying an edge padding adhesive to join the sets.
Claim 31
Independent Claim
152 words
A method of making a record material, wherein the record material comprises a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, the pigment coating comprising (a) a pigment, (b) a binder for the pigment and (c) at least one of (i) a sizing agent and (ii) a coating structure agent, said method comprising; (1) coating one side of a paper sheet with an aqueous pigment coating mixture comprising components (a), (b) and (c), wherein the aqueous mixture contains from about 25 to about 75% solids by weight of the mixture; (2) drying the sheet to provide a coated sheet having a Bendtsen porosity of at least about 25 ml/min; and (3) coating the other side of the sheet with the color former coating formulation at a rate of at least about 400 m/min.
Claim 32
Independent Claim
152 words
A method of making a record material, wherein the record material comprises a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, the pigment coating comprising (a) a pigment, (b) a binder for the pigment and (c) at least one of (i) a sizing agent and (ii) a coating structure agent, said method comprising; (1) coating one side of a paper sheet with an aqueous pigment coating mixture comprising components (a), (b) and (c), wherein the aqueous mixture contains from about 25 to about 75% solids by weight of the mixture; (2) drying the sheet to provide a coated sheet having a Bendtsen porosity of at least about 25 ml/min; and (3) coating the other side of the sheet with the color former coating formulation at a rate of at least about 400 m/min.
Claim 33
Dependent Claim
23 words
A method according to claim 29, wherein the aqueous mixture contains from about 50 to about 65% solids by weight of the mixture.
Claim 34
Independent Claim
131 words
A method of making multiple form sets comprising; (1) stacking at least two form sets comprising a CB sheet, a CF sheet, and optionally, at least one CFB sheet stacked between said CB sheet and said CF sheet, wherein said CB sheet includes a record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises (a) a pigment, (b) a binder for the pigment, (c) a sizing agent to prevent separation of the sheets within the sets upon fanning of the sets, and optionally, (d) a coating structure agent; (2) providing an edge padding adhesive on one side of the stack; and (3) drying the stack.
Claim 35
Independent Claim
131 words
A method of making multiple form sets comprising; (1) stacking at least two form sets comprising a CB sheet, a CF sheet, and optionally, at least one CFB sheet stacked between said CB sheet and said CF sheet, wherein said CB sheet includes a record material comprising a paper sheet having on its front a printable pigment coating and on its back isolated droplets of color former solution each confined within a pressure rupturable barrier, wherein the pigment coating comprises (a) a pigment, (b) a binder for the pigment, (c) a sizing agent to prevent separation of the sheets within the sets upon fanning of the sets, and optionally, (d) a coating structure agent; (2) providing an edge padding adhesive on one side of the stack; and (3) drying the stack.
Claim 36
Dependent Claim
13 words
A method according to claim 31, further comprising fanning the multiple form sets.
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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) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |