US4573409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating printed computer paper
Assignee: PAPER Inc A CORP OF
•
Filing: 1982-12-02
•
Granted: 1986-03-04
•
Expires: 2002-12-02
Abstract
Abstract In a method of rendering subject matter which is printed on one surface of a computer paper sheet unintelligible, an alpha-numeric interference pattern is printed over substantially the entire printing area of the surface of the sheet carrying the printed subject matter, the density of the interference pattern being sufficient to render the printed subject matter unintelligible. One particular use of the method is in the overprinting of computer print-out paper having printed information on one surface, so that the paper may be reused by printing on its opposite surface without permitting access to the information on the first-printed surface. A machine is disclosed for this application of the method.
Inventors
- 👤 Milton Clar
- 👤 Barclay Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:23
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/02; B65H45/06; B65H45/10; B65H45/101; B65H45/1015; B41; B41F; B41F17/00; B41F17/02; B41M; B41M3/00; B41M3/14; B41M7/00; B41M7/0009; Y; Y10; Y10S; Y10S283/00; Y10S283/901; Y10S428/00; Y10S428/919
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
A method of reusing a web of computer paper having a series of interconnected sheets, eah computer-printed on only one surface with character-based information and having the opposite surface free of printing, comprising drawing the web continuously past a rotary printing cylinder having a printing plate formed over substantially its entire printing suirface with a character-based interference printing pattern, characters of the interference printing pattern being the same as or similar to characters of the information, and using said plate to print said pattern over substantially the entire printing area of said one surface of each sheet without reference to the location thereon of the information, the composition and density of the pattern being surfficient to obliterate the information, whereby the opposite surface of each sheet may be used for subsequent printing without permitting access to said information, and thereafter computer-printing on said opposite surface of the sheet.
Claim 2
Independent Claim
148 words
A method of reusing a web of computer paper having a series of interconnected sheets, eah computer-printed on only one surface with character-based information and having the opposite surface free of printing, comprising drawing the web continuously past a rotary printing cylinder having a printing plate formed over substantially its entire printing suirface with a character-based interference printing pattern, characters of the interference printing pattern being the same as or similar to characters of the information, and using said plate to print said pattern over substantially the entire printing area of said one surface of each sheet without reference to the location thereon of the information, the composition and density of the pattern being surfficient to obliterate the information, whereby the opposite surface of each sheet may be used for subsequent printing without permitting access to said information, and thereafter computer-printing on said opposite surface of the sheet.
Claim 3
Dependent Claim
33 words
A method as defined in claim 1, wherein the sheets are joined by transverse fold lines and the printing plate leaves transverse unprinted bands on the paper web registered with said fold lines.
Claim 4
Dependent Claim
21 words
A method as defined in claim 1, wherein the character-based information is alpha-numeric printing disposed in lines transversely of the web.
References Cited (Backward Citations)
US1305296A
Cited
US1692405A
Cited
GB264881A
Cited
US1854546A
Cited
US2153850A
Cited
US2226855A
Cited
US2952080A
Cited
FR1197191A
Cited
US3055117A
Cited
US3247005A
Cited
US3852088A
Cited
CH622740A5
Cited
US4328749A
Cited
US4289556A
Cited
US4301728A
Cited
US4344715A
Cited
US4400105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |