Title:
ANTENNA SYSTEM FOR QUESTION STATION FOR IDENTIFYING OBJECT
Document Type and Number:
Japanese Patent JP3163139
Kind Code:
B2
Abstract:
PURPOSE: To remove a dead zone produced at the center of a frame face by disposing a frame antenna on the circumference of a conveyor for question, and equipping its upper side with an individual read antenna having a hinge system hanging tool for receiving.
CONSTITUTION: A frame antenna 2 is disposed on the circumference of a conveyor 1, an individual receiving antenna 3 hung at the top side thereof in a hinge system is provided so as to remove the antenna 2 at the time when an object approaches, and is used. The antenna 3 is arranged slightly upward of substantially the center of a frame face. In order to prevent fatigue of a connection wire, the antenna 3 is connected to the receiver of a transmitting and receiving unit by inductive coupling of two coils. Thereby a dead zone produced at the center is removed, and irradiation and reading can be achieved very precisely.
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Inventors:
George Holoduck
Loeck Duhonto
Loeck Duhonto
Application Number:
JP1020692A
Publication Date:
May 08, 2001
Filing Date:
January 23, 1992
Export Citation:
Assignee:
Texas Instruments Holland Besloten Fennaught Shap
International Classes:
G01S7/03; G01S13/74; G06K7/00; H01Q7/00; (IPC1-7): G01S13/74; G01S7/03
Domestic Patent References:
| JP4345424A | ||||
| JP344754U |
Attorney, Agent or Firm:
Akira Asamura (3 outside)