Theft detection marker and method
AssigneeMarian Rubber Products Company, Inc.
InventorWilliam J. Witchger
Life of this patent
Estimating the term…
Abstract
A marker device for merchandise items has blanks of high magnetic coercivity material spaced along a strip of high magnetic permeability material. The strip and blanks are the same width, produced from three ribbons of material, one ribbon of the high coercivity material, another of the high permeability material, and a third having a pressure sensitive adhesive surface in one process embodiment, and the third being a heat activated adhesive film in another process embodiment. The strip and blanks are thereby adhesively connected. Multiple strips of the marker devices are produced simultaneously by running adhesively connected ribbons through a gang of slitter knives.
Claims15
A method for producing a theft detection marker and comprising the steps of:
- taking a first ribbon of a material having high magnetic permiability and a second ribbon of a material having high magnetic coercivity;
- punching out areas of the second ribbon at spaced locations along its length to provide slots therein at spaced locations along its length;
- moving the two ribbons toward take-up devices and adhesively connecting portions of the second ribbon to the first ribbon;
- passing the connected ribbon portions through a slitting station to divide the connected ribbon portions into strips;
- and
- collecting the strips separately onto the take-up devices.
A method for producing a theft detection device marker and comprising the steps of:
- taking a first ribbon of a material having high magnetic permeability such that when subjected to a continuous alternating magnetic interrogation field, the material will produce characteristic detectable disturbances in the field;
- and
- taking a second ribbon of a material having higher magnetic coercivity such that, when magnetized, it will effectively prevent the material of the first ribbon from responding to the alternating magnetic field;
- moving the two ribbons toward collectors;
- punching out areas of the second ribbon at spaced locations along its length to provide slots therein at spaced locations along its length;
- adhesively connecting portions of the second ribbon to the first ribbon;
- passing the connected ribbon portions through a slitting station to divide the connected ribbons into strips;
- and
- delivering the strips to the collectors.
A theft detection marker comprising:
- a strip of a first material having a high magnetic permeability;
- a plurality of blanks of a second material having high magnetic coercivity spaced along the first material strip,
- the blanks having the same width as the strip;
- adhesive material connecting the blanks to the strip;
- the adhesive material extending substantially the full width of the blanks.
Dependencies are inferred from the claim text.