Patent US3900671A successfully refreshed from Google Patents.
US3900671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capsule-carrying sheets or webs
Assignee: Arjo Wiggins Ltd
•
Filing: 1972-10-06
•
Granted: 1975-08-19
•
Expires: 1992-10-06
Abstract
Abstract A capsule-carrying sheet or web, e.g. a sheet carrying capsules containing a colour-reactant material for use in a pressuresensitive copying system, in which one surface of the sheet or web carries a coating incorporating the capsules, together with starch particles acting as a protection for the capsules against accidental rupture and a protein binder binding the capsules and starch particles together on the surface, both the starch particles and the protein binder being derived from a common milled flour source, e.g. by agitation of an aqueous suspension of the milled flour.
Inventors
- 👤 Brian Edward Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:21
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/1243; Y; Y10; Y10S; Y10S428/00; Y10S428/905; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31725; Y10T428/31768; Y10T428/31772; Y10T428/31775
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
A PROCESS FOR PRODUCING A CAPSULE-CARRYING SHEET OR WEB COMPRISING A BASE SHEET OR WEB HAVING ON A SURFACE THEREOF A COATING COMPRISING CAPSULES, PROTECTIVE PARTICLES AS PROTECTION FOR THE CAPSULES, AND A BINDER FOR THE CAPSULES AND THE PROTECTIVE PARTICLES, WHEREIN THE PROTECTIVE PARTICLES ARE STARCH PARTICLES AND THE BINDER IS A PROTEIN BINDER WITH THE STARCH PARTICLES AND THE PROTEIN BINDER BEING BOTH DERIVED FROM A COMMON MILLED FLOUR SOURCE, WHICH PROCESS COMPRISES (A) TREATING MILLED FLOUR TO PROVIDE THE STARCH PARTICLES AND THE PROTEIN BINDER, AND (B) COATING THE STARCH PARTICLES AND PROTEIN BINDER ONTO THE BASE SHEET OR WEB TOGETHER WITH THE CAPSULES.
Claim 2
Dependent Claim
107 words
A PROCESS FOR PRODUCING A CAPSULE-CARRYING SHEET OR WEB COMPRISING A BASE SHEET OR WEB HAVING ON A SURFACE THEREOF A COATING COMPRISING CAPSULES, PROTECTIVE PARTICLES AS PROTECTION FOR THE CAPSULES, AND A BINDER FOR THE CAPSULES AND THE PROTECTIVE PARTICLES, WHEREIN THE PROTECTIVE PARTICLES ARE STARCH PARTICLES AND THE BINDER IS A PROTEIN BINDER WITH THE STARCH PARTICLES AND THE PROTEIN BINDER BEING BOTH DERIVED FROM A COMMON MILLED FLOUR SOURCE, WHICH PROCESS COMPRISES (A) TREATING MILLED FLOUR TO PROVIDE THE STARCH PARTICLES AND THE PROTEIN BINDER, AND (B) COATING THE STARCH PARTICLES AND PROTEIN BINDER ONTO THE BASE SHEET OR WEB TOGETHER WITH THE CAPSULES.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the milled flour is treated by agitation of an aqueous suspension thereof.
Claim 4
Dependent Claim
30 words
The process of claim 1 wherein the milled flour is treated to remove small size range starch particles prior to treatment thereof to derive the starch particles and protein binder.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein a majority of the starch particles are of a size between about 1 1/2 and 2 times the average size of the capsules.
Claim 6
Dependent Claim
40 words
The process of claim 1 wherein said starch particles and said protein binder are derived from a flour selected from the group comprising flours of wheat, Indian corn, potato, sweet potato, sago, tapico, rice, glutinous rice, glutinous corn and arrowroot.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the capsules have walls of gelatin and gum arabic.
Claim 8
Dependent Claim
20 words
The process of claim 1 wherein the capsules contain the dye substances crystal violet lactone and benzoyl leuco methylene blue.
Claim 9
Dependent Claim
25 words
The process of claim 1 wherein the capsules contain a colourless, chromogenic material of basic reactant chemical properties held in solution in an oily solvent.
Claim 10
Dependent Claim
8 words
The product of the process of claim 1.
References Cited (Backward Citations)
US2730457A
Cited
US3640756A
Cited
US3573085A
Cited
US3697323A
Cited
US3746563A
Cited
US3758324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |