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Method for reading magnetic data

A magnetic data and magnetic activation technology, applied in the field of reading magnetic data, can solve the problems of short service life, easy wear and tear, and the reading head is fragile, and achieve the effect of simplified and accurate reading

Inactive Publication Date: 2007-10-10
ARJO WIGGINS BASINGSTOKE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one disadvantage of using inductive head technology to read magnetic data is that in order to obtain satisfactory magnetic data reading effect, a higher content of magnetic materials needs to be mixed into thin layer products
However, it has been found that such read heads are fragile and subject to wear and have a relatively short service life

Method used

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  • Method for reading magnetic data
  • Method for reading magnetic data
  • Method for reading magnetic data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0121] Using the general method disclosed in WO 03 / 102926, several samples of laminar articles were made comprising a pair of laminated outer lamellae, wherein between the two outer lamellae one contained A magnetic layer of magnetically activatable particles.

[0122] The two thin layers used are as follows

[0123] Thin layer 1 has pre-coating (pre-coating formula is 5 ~ 10gm -2 Calcium carbonate and latex) 60μm thick raw thin layer thin layer 2-80gm -2 carbon-free CF

[0124] Laminate on a laminator by using a water-soluble glue roll-coating system consisting of a 1:1 (dry) mixture of magnetic pigment ink (DWFPN022 from Pyral) and styrene-butadiene latex laminating glue These thin layers, the dry magnetic pigment coating weight on the thin layer is 3~14gm -2 .

[0125] Data tracks were recorded on each sample as described using a Tally Genicom T5200 ticket printer modified to record at 75 bpi. These samples were then checked for magnetic data readability on the same T...

Embodiment 2

[0129] The experimental setup used in this example is shown in FIG. 15 . The experimental set-up used in this example was similar to that in Example 1, except that an additional MR head identical to the active readout MR head was added to provide noise / thermal compensation, ie, to compensate for common mode electromagnetic signals. The compensating head is mounted at a certain distance behind the active MR head and at right angles to it.

[0130] Using a Tally inductive reread head, two different data-encoded tracks were recorded onto a layer similar to that described in Example 1, prepared using Thin Layer 1, with a 2 gm -2 Laminate thin layers of magnetic pigment coating weight on a dry basis. Three separate castellated heads are used to read the data tracks: (i) the read head shown in Fig. 7 with a distance between fins of 2 μm, the edge length of each fin parallel to the longitudinal axis of the sensor is 25 μm, except The lateral width of the sensor outside the fins is ...

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Abstract

A method of reading magnetic data from a magnetically-activatable sheet product carrying magnetic data. The product comprises a pair of laminated outer sheets (131, 132) between which is a magnetic layer (130) comprising magnetically-activatable particles in a binder matrix. For reading the data, a thin-film magnetoresistive sensor is used in which the shape anisotropy of the sensor is enhanced in a direction transversely to the longitudinal axis of the sensor.

Description

technical field [0001] The present invention relates to a method of reading magnetic data from laminated magnetic printing paper. Background of the invention [0002] Thin-layer articles capable of storing both magnetic and conventionally printed information have gained widespread acceptance. WO 01 / 92961 discloses a thin-layer material loaded with a coating containing holes in which electrically and / or magnetically activatable particles are present. WO 03 / 102926 discloses a magnetically activatable laminate comprising a pair of laminated outer sheets, at least one of which has a pigment / adhesive primer on its inner surface, between two Between the outer thin layers is a magnetic layer comprising magnetically activatable particles in a binder matrix, the outer thin layer having sufficient opacity to mask the appearance of the magnetic layer. WO 03 / 101744 discloses a magnetically activatable thin layer article for use in pressure sensitive copy paper ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/00G11B5/39G11B5/33B32B5/16G11B5/127
CPCB32B29/04B32B5/16B32B2250/40B32B2255/12B32B2264/105B32B2307/208B32B2425/00B32B2429/00G11B5/127G11B5/39G11B5/33G11B5/02
Inventor 保罗·詹姆士·戴维德斯蒙德·詹姆士·马普斯理查德·大卫·桑德斯
Owner ARJO WIGGINS BASINGSTOKE