US3684866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning aperture
Assignee: Vertex Industries Inc
•
Filing: 1970-07-09
•
Granted: 1972-08-15
•
Expires: 1990-07-09
Abstract
Abstract An optical label scanning system has a parallelogram-shaped aperture for scanning.
Inventors
- 👤 Paul W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10831
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
In an optical scanning system for scanning stripes having lengths and widths normally respectively perpendicular and parallel to the scanning direction and separated by a separation a, said system having masking means formed with an aperture for restricting the cross sectional area of light rays that may impinge upon a photo-detector masked by said masking means, the improvement comprising, means defining an aperture in said mask that is parallelogramshaped with the major diagonal thereof perpendicular to said scanning direction and the minor diagonal corresponding to said separation a between stripes, said aperture defining an area greater than that of a circle having diameter a, whereby said apparatus scans through said aperture a larger portion of each bar than a circular aperture of the same area without bar-tobar overlap while allowing considerably more latitude in angular misalignment of the bars than a horizontal slit aperture.
Claim 2
Dependent Claim
144 words
In an optical scanning system for scanning stripes having lengths and widths normally respectively perpendicular and parallel to the scanning direction and separated by a separation a, said system having masking means formed with an aperture for restricting the cross sectional area of light rays that may impinge upon a photo-detector masked by said masking means, the improvement comprising, means defining an aperture in said mask that is parallelogramshaped with the major diagonal thereof perpendicular to said scanning direction and the minor diagonal corresponding to said separation a between stripes, said aperture defining an area greater than that of a circle having diameter a, whereby said apparatus scans through said aperture a larger portion of each bar than a circular aperture of the same area without bar-tobar overlap while allowing considerably more latitude in angular misalignment of the bars than a horizontal slit aperture.
Claim 3
Dependent Claim
20 words
The improvement according to claim 1 wherein the angle subtended by the minor diagonal is less than substantially 65* .
References Cited (Backward Citations)
US3351765A
Cited
US3243776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |