US3715267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sensitive stencil sheet
Assignee: Ricoh Co Ltd
•
Filing: 1970-09-25
•
Granted: 1973-02-06
•
Expires: 1990-09-25
Abstract
Abstract A heat-sensitive stencil sheet comprising a porous supporting sheet and a thermoplastic resin film which is bonded to one surface of the supporting sheet with an adhesive containing at least one metal salt of a higher fatty acid having from 10 to 22 carbon atoms.
Inventors
- 👤 K Kubo
- 👤 K Sakai
- 👤 T Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:28
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B41; B41N; B41N1/00; B41N1/24; B41N1/241; B32B27/30; B32B27/302; B32B27/304; B32B27/306; B32B27/308; B32B27/32; B32B7/00; B32B7/04; B32B7/12; B32B2323/00; B32B2323/04; B32B2323/10; B32B2325/00; B32B2327/00; B32B2327/06; Y; Y10; Y10S; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A heat-sensitive stencil sheet of the class in which perforations corresponding to a graphic original are thermally produced by selective melting of the film in a thermoplastic resin film on a porous support comprising a porous supporting sheet and a thermoplastic resin film from 5 to 10 microns thick, said film being bonded to a surface of said supporting sheet with an adhesive containing therein at least one salt selected from the group consisting of metal salts of higher fatty acids having 10 to 22 carbon atoms which melt without chemical change at substantially the same temperature at which said perforations are produced in a thermoplastic film.
Claim 2
Dependent Claim
107 words
A heat-sensitive stencil sheet of the class in which perforations corresponding to a graphic original are thermally produced by selective melting of the film in a thermoplastic resin film on a porous support comprising a porous supporting sheet and a thermoplastic resin film from 5 to 10 microns thick, said film being bonded to a surface of said supporting sheet with an adhesive containing therein at least one salt selected from the group consisting of metal salts of higher fatty acids having 10 to 22 carbon atoms which melt without chemical change at substantially the same temperature at which said perforations are produced in a thermoplastic film.
Claim 3
Dependent Claim
25 words
A stencil sheet according to claim 1, wherein the metal salts have a melting point in the range of from about 70* to 150* C.
Claim 4
Dependent Claim
59 words
A stencil sheet according to claim 1, wherein the amount of said adhesive to be applied is in the range of from about 0.5 to 2.5 grams per square meter, and the amount of metal salt contained in the adhesive is such that it is applied in the range of from about 0.2 to 2.0 grams per square meter.
Claim 5
Dependent Claim
31 words
A stencil sheet according to claim 1, wherein the metals constituting said metal salts are selected from those metals in Groups I, II, Iv, VII and VIII of the Periodic Table.
Claim 6
Dependent Claim
18 words
A stencil sheet according to claim 1, wherein said adhesive is a vinyl resin or an acrylic resin.
References Cited (Backward Citations)
US2699113A
Cited
US2954311A
Cited
US3120611A
Cited
US3108896A
Cited
US3100702A
Cited
US3125458A
Cited
US3280732A
Cited
US3094620A
Cited
US3260612A
Cited
US3241997A
Cited
US3223838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |