US3831007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reproducible document
Assignee: International Business Machines Corp
•
Filing: 1973-03-21
•
Granted: 1974-08-20
•
Expires: 1993-03-21
Abstract
Abstract Illegal or unauthorized reproduction of copyrighted or classified indicia is precluded by imprinting such indicia on a document having a special preprinted background. This background comprises a plurality of groups of lines, the lines of each group being parallel to each other ahd having a predetermined spacing to form a series of light and dark areas in a repetitive deltadistance code pattern; however, the lines of each group are nonparallel to the lines of adjacent other groups. If this code pattern is detected during movement of a sensing means translationally relative to the document during photocopying by a convenience office copier, appropriate circuitry responds to shut down the copier. The nonparallel groups of lines assure that shutdown will occur irrespective of the manner in which the document is oriented relative to the sensing means during the aforesaid translational movement.
Inventors
- 👤 J Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:40
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/08; G03G; G03G21/00; G03G21/04; G03G21/046; G07; G07D; G07D7/00; G07D7/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
As an article of manufacture, a document having a preprinted background comprised of a plurality of groups of lines, the lines of each group being parallel to each other and having a predetermined spacing and consisting of lines of equal width separated by spaces of a plurality of different widths to form a series of light and dark areas in a repetitive pattern, but the lines of each group being nonparallel to the lines of adjacent other groups, said pattern of lines and spaces remaining constant during movement of a sensing means translationally at a preselected constant speed relative to the document during a photocopying operation so as to initiate a preselected control operation when detected during such photocopying operation, the nonparallel groups of lines assuring that the control operation will be initiated irrespective of the manner in which the document is aligned and oriented during such translational relative movement.
Claim 2
Dependent Claim
150 words
As an article of manufacture, a document having a preprinted background comprised of a plurality of groups of lines, the lines of each group being parallel to each other and having a predetermined spacing and consisting of lines of equal width separated by spaces of a plurality of different widths to form a series of light and dark areas in a repetitive pattern, but the lines of each group being nonparallel to the lines of adjacent other groups, said pattern of lines and spaces remaining constant during movement of a sensing means translationally at a preselected constant speed relative to the document during a photocopying operation so as to initiate a preselected control operation when detected during such photocopying operation, the nonparallel groups of lines assuring that the control operation will be initiated irrespective of the manner in which the document is aligned and oriented during such translational relative movement.
Claim 3
Dependent Claim
38 words
A document according to claim 1, wherein the background is preprinted in an ink having spectral characteristics matched to that of the sensing means to encompass the total spectrum within which the photocopying machine performs its photocopying operation.
Claim 4
Dependent Claim
40 words
A document according to claim 1, wherein the lines of the repetitive pattern conform to a preselected value in delta distance code, which value is the only value to which the sensing means is responsive to initiate the control operation.
Claim 5
Dependent Claim
158 words
For use with a convenience office copier comprising photosensing means that moves translationally at a constant speed relative to a document-supporting bed during a copying operation, and means controlled by said photosensing means responsive to a predetermined spacing of light and dark areas to initiate a preselected control operation: a document having a preprinted background comprised of a plurality of groups of lines, the lines of each group being parallel to each other and consisting of lines of equal width separated by spaces of a plurality of difference widths to form a repetitive pattern of light and dark areas with said predetermined spacing, which pattern remains constant irrespective of the magnitude of the constant speed, the lines of each group being nonparallel to the lines of adjacent other groups, the nonparallel groups of lines assuring that the control operation will be initiated irrespective of the manner in which the document is aligned and oriented on the document-supporting bed.
Claim 6
Dependent Claim
158 words
For use with a convenience office copier comprising photosensing means that moves translationally at a constant speed relative to a document-supporting bed during a copying operation, and means controlled by said photosensing means responsive to a predetermined spacing of light and dark areas to initiate a preselected control operation: a document having a preprinted background comprised of a plurality of groups of lines, the lines of each group being parallel to each other and consisting of lines of equal width separated by spaces of a plurality of difference widths to form a repetitive pattern of light and dark areas with said predetermined spacing, which pattern remains constant irrespective of the magnitude of the constant speed, the lines of each group being nonparallel to the lines of adjacent other groups, the nonparallel groups of lines assuring that the control operation will be initiated irrespective of the manner in which the document is aligned and oriented on the document-supporting bed.
Claim 7
Dependent Claim
41 words
A document according to claim 4, wherein the repetitive pattern of light and dark areas conforms to a preselected value in delta distance code, which value is the only value to which the means controlled by the photosensing means is responsive.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |