US4085838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Type correction article employing adhesives
Assignee: 3M Co
•
Filing: 1974-03-14
•
Granted: 1978-04-25
•
Expires: 1994-03-14
Abstract
Abstract An article adapted for the adhesive removal of typewritten, vertically cohesive ink characters from a substrate, said article comprising, in combination, a rigid body member having affixed thereto a resilient, discriminating adhesive portion in projecting relation to said body member, the adhesive portion of said article comprising a fused blend of a resin and a plasticizer and having a discriminating affinity for typewriter ink.
Inventors
- 👤 James N. Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:35
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/26; B41J29/36; B41J29/373
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
An article having particular utility in the corrective removal of typewritten ink characters from typing substrates such as paper, said characters being of the type characterized by greater internal cohesion than external adhesion to said substrates, said article comprising (a) at least one discriminating adhesive portion comprising a fused blend of 30 to 55 parts by weight vinyl resin and 70 to 45 parts by weight compatible plasticizer, said portion defining a deformable resilient projection, the surface of said projection having a discriminating affinity for typewriter ink, and (b) means by which said article can be gripped.
Claim 2
Dependent Claim
97 words
An article having particular utility in the corrective removal of typewritten ink characters from typing substrates such as paper, said characters being of the type characterized by greater internal cohesion than external adhesion to said substrates, said article comprising (a) at least one discriminating adhesive portion comprising a fused blend of 30 to 55 parts by weight vinyl resin and 70 to 45 parts by weight compatible plasticizer, said portion defining a deformable resilient projection, the surface of said projection having a discriminating affinity for typewriter ink, and (b) means by which said article can be gripped.
Claim 3
Dependent Claim
38 words
An article according to claim 1 wherein said discriminating adhesive portion is a plastisol consisting essentially of a fused blend of 30 to 55 parts by weight compatible vinyl resin and 70 to 45 parts by weight plasticizer.
Claim 4
Dependent Claim
24 words
An article according to claim 1 wherein said vinyl resin is selected from the group consisting of polyvinyl chloride, polyvinyl chloride-acetate, and polyvinyl acetal.
Claim 5
Dependent Claim
27 words
An article according to claim 1 wherein said plasticizer is a liquid monomeric plasticizer selected from the group consisting of organic acid esters and aryl phosphate esters.
Claim 6
Dependent Claim
14 words
An article according to claim 1 wherein said plasticizer is a liquid polymeric plasticizer.
Claim 7
Dependent Claim
24 words
An article according to claim 5 wherein said liquid polymeric plasticizer is selected from the group consisting of epoxy resins and acetylated polyester resins.
Claim 8
Dependent Claim
30 words
An article according to claim 1 wherein said blend additionally contains up to 15% by weight of the total composition of a mixture comprising dimer acid and solid polyamide resin.
Claim 9
Dependent Claim
118 words
An article having particular utility in the corrective removal of typewritten ink characters from a paper substrate, said characters being of the type characterized by greater internal cohesion than external adhesion to paper, said article comprising (a) at least one discriminating adhesive portion defining a deformable resilient projection, the surface of said projection having a discriminating affinity for typewriter ink, said discriminating adhesive portion comprising a plastisol consisting essentially of 30 to 55 parts by weight vinyl resin, 70 to 45 parts by weight plasticizer and additionally up to 15 percent by weight, based on the total composition, of a mixture of dimer acid and solid polyamide resin, and (b) means by which said article can be gripped.
Claim 10
Dependent Claim
118 words
An article having particular utility in the corrective removal of typewritten ink characters from a paper substrate, said characters being of the type characterized by greater internal cohesion than external adhesion to paper, said article comprising (a) at least one discriminating adhesive portion defining a deformable resilient projection, the surface of said projection having a discriminating affinity for typewriter ink, said discriminating adhesive portion comprising a plastisol consisting essentially of 30 to 55 parts by weight vinyl resin, 70 to 45 parts by weight plasticizer and additionally up to 15 percent by weight, based on the total composition, of a mixture of dimer acid and solid polyamide resin, and (b) means by which said article can be gripped.
Claim 11
Dependent Claim
139 words
A discriminating adhesive composition useful in manufacturing an article having particular utility in the corrective removal of typewritten ink characters from typing substrates such as paper, said characters being of the type characterized by greater internal cohesion than external adhesion to said substrates, said article comprising (a) at least one discriminating adhesive portion defining a deformable resilient projection, the surface of said projection having a discriminating affinity for typewriter ink, and (b) means by which said article can be gripped, said composition comprising a fused blend of vinyl resin, a compatible plasticizer for said vinyl resin and an adhesion improving amount, up to about 15 percent by weight of the total composition, of a blend of dimer acid and solid polyamide resin and including means for attaching said composition to said means by which said article can be gripped.
Claim 12
Dependent Claim
139 words
A discriminating adhesive composition useful in manufacturing an article having particular utility in the corrective removal of typewritten ink characters from typing substrates such as paper, said characters being of the type characterized by greater internal cohesion than external adhesion to said substrates, said article comprising (a) at least one discriminating adhesive portion defining a deformable resilient projection, the surface of said projection having a discriminating affinity for typewriter ink, and (b) means by which said article can be gripped, said composition comprising a fused blend of vinyl resin, a compatible plasticizer for said vinyl resin and an adhesion improving amount, up to about 15 percent by weight of the total composition, of a blend of dimer acid and solid polyamide resin and including means for attaching said composition to said means by which said article can be gripped.
Claim 13
Independent Claim
179 words
A method of removing an individual typewritten ink character from a substrate, said ink character being of the type characterized by greater internal cohesion than external adhesion to the substrate, the method comprising (a) contacting an area including said ink character with a deformable, resilient, discriminating adhesive having a discriminating affinity for said ink character, said discriminating adhesive comprising a fused blend of 30 to 55 parts by weight vinyl resin and 70 to 45 parts by weight compatible plasticizer, (b) applying sufficient force to said discriminating adhesive to cause said discriminating adhesive to deform and substantially cover said character area, (c) maintaining said force for a time sufficient to allow said discriminating adhesive to intimately contact the surface of said ink character, (d) quickly jerking said discriminating adhesive from the surface of said substrate whereby said ink character adheres to said discriminating adhesive and is removed from said substrate, and (e) contacting said ink character adhered to said discriminating adhesive with a pressure-sensitive adhesive, whereby said ink character is transferred from the discriminating adhesive to said pressure-sensitive adhesive.
Claim 14
Independent Claim
179 words
A method of removing an individual typewritten ink character from a substrate, said ink character being of the type characterized by greater internal cohesion than external adhesion to the substrate, the method comprising (a) contacting an area including said ink character with a deformable, resilient, discriminating adhesive having a discriminating affinity for said ink character, said discriminating adhesive comprising a fused blend of 30 to 55 parts by weight vinyl resin and 70 to 45 parts by weight compatible plasticizer, (b) applying sufficient force to said discriminating adhesive to cause said discriminating adhesive to deform and substantially cover said character area, (c) maintaining said force for a time sufficient to allow said discriminating adhesive to intimately contact the surface of said ink character, (d) quickly jerking said discriminating adhesive from the surface of said substrate whereby said ink character adheres to said discriminating adhesive and is removed from said substrate, and (e) contacting said ink character adhered to said discriminating adhesive with a pressure-sensitive adhesive, whereby said ink character is transferred from the discriminating adhesive to said pressure-sensitive adhesive.
References Cited (Backward Citations)
US4007823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |