US4575624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for activating and/or deactivating a marker strip having a magnetizable layer
Assignee: Rheinmetall Industrie AG
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Filing: 1983-11-30
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Granted: 1986-03-11
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Expires: 2003-11-30
Abstract
Abstract A portable device for deactivating and/or activating a magnetizable layer forming part of a marker strip of an antishoplifting system. The device includes an electro-optical reading head for reading specially coded indicia on the marker strip and an A.C. current electro-magnetic coil for producing a magnetic field to deactivate or activate the magnetizable layer of the marker strip. The electro-optical reading head and electro-magnetic coil are mounted in a common portable housing and are connected to a cashier's register.
Inventors
- 👤 Erhard Klinkhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:55
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2408; G08B13/2411; G06; G06K; G06K19/00; G06K19/06; G06K19/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A portable device for activating and/or deactivating a magnetizable layer which forms part of a marker strip of an anti-shoplifting system, comprising means for producing an electro-magnetic activating or deactivating field; electro-optical reading means for reading a readable or pictorial coding on said marker strip; means for preventing production of said activating or deactivating field until said electro-optical reading means has read said readable or pictorial coating on said marker strip; said electro-magnetic field producing means and electro-optical reading means being mounted in a common portable housing.
Claim 2
Dependent Claim
87 words
A portable device for activating and/or deactivating a magnetizable layer which forms part of a marker strip of an anti-shoplifting system, comprising means for producing an electro-magnetic activating or deactivating field; electro-optical reading means for reading a readable or pictorial coding on said marker strip; means for preventing production of said activating or deactivating field until said electro-optical reading means has read said readable or pictorial coating on said marker strip; said electro-magnetic field producing means and electro-optical reading means being mounted in a common portable housing.
Claim 3
Dependent Claim
41 words
The portable device for activating and/or deactivating a magnetizable layer as set forth in claim 1, including an electrically operable cashier's register, and an electrical connection for connecting said electro-magnetic field producing means and electro-optical reading means to said cashier's register.
Claim 4
Dependent Claim
48 words
The portable device for activating and/or deactivating a magnetizable layer as set forth in claim 2, including manual switching means mounted on said common portable housing and operatively connected to said electro-optical reading means and to said electro-magnetic field producing means for manually activating or deactivating these means.
Claim 5
Dependent Claim
87 words
A marker strip for use with a portable antishoplifting device for deactivating and/or activating the marker strip, comprising in combination, a carrier strip portion; double-stick adhesive foils mounted on opposite sides of the carrier strip portion; two superimposed magnetizable strip portions, one of which is made of hard magnetic material and the other one of which is made of soft magnetic material; and a cover strip portion having readable and/or pictorial indicia imprinted thereon, said foils and strip portions being joined together to from the marker strip.
Claim 6
Dependent Claim
87 words
A marker strip for use with a portable antishoplifting device for deactivating and/or activating the marker strip, comprising in combination, a carrier strip portion; double-stick adhesive foils mounted on opposite sides of the carrier strip portion; two superimposed magnetizable strip portions, one of which is made of hard magnetic material and the other one of which is made of soft magnetic material; and a cover strip portion having readable and/or pictorial indicia imprinted thereon, said foils and strip portions being joined together to from the marker strip.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |