US5274392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tilted antenna
Assignee: Texas Instruments Inc
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Filing: 1992-01-08
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Granted: 1993-12-28
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Expires: 2012-01-08
Abstract
Abstract A novel antenna system disposed around a conveyor belt for the interrogation of objects passing through the antenna which overcomes centralized dead zone problems is disclosed. A frame antenna is disposed around a conveyor belt and is tilted to form, for example, a 30 deg. angle with the vertical longitudinal plane of the conveyor belt, which is perpendicular to the horizontal plane within which the conveyor belt lies, and a 30 deg. angle with the transverse axis of the conveyor belt. In this way, a "dead-zone" free read area is formed to facilitate the read of a transponder oriented in any manner as it moves along the conveyor belt.
Inventors
- 👤 Loek D'Hont
- 👤 Josef H. Schuermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:39
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10009; G06K7/10316; G06K7/10336; G06K7/0008
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
The antenna system for interrogation and identification of a transponder, wherein the transponder moves along an interrogation path comprising: a frame antenna disposed around the interrogation path for interrogating a transponder moving along said interrogation path, said frame antenna defining a plane intersecting said interrogation path and oriented such that said plane forms an angle with the vertical longitudinal plane of the interrogation path and simultaneously said plane forms an accute angle with the transverse axis of said interrogation path.
Claim 2
Dependent Claim
80 words
The antenna system for interrogation and identification of a transponder, wherein the transponder moves along an interrogation path comprising: a frame antenna disposed around the interrogation path for interrogating a transponder moving along said interrogation path, said frame antenna defining a plane intersecting said interrogation path and oriented such that said plane forms an angle with the vertical longitudinal plane of the interrogation path and simultaneously said plane forms an accute angle with the transverse axis of said interrogation path.
Claim 3
Dependent Claim
12 words
The antenna system of claim 1, wherein said acute angle is 30°.
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) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |