B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
42/8
B41M 5/00 (2006.01) B41M 5/36 (2006.01)
Patent
CA 1142357
Summary In order to be able, in a simple manner, to erase, by heating, data recorded on bodies with reversible, tempe- rature-variable light extinctions, and then to be able to use the body a new for the recording of data, these bodies consist of at least one polymer material and/or resin matrix material (A) and at least one organic low-molecular substance (B), which is insoluble, at least partially, in the latter and which is contained therein as a dispersed second phase, whereby the pair of materials (A/B) possess variable light extinctions below a specific temperature (T0) in dependence on a previous heating above To and are so constituted that, upon being heated above a conversion temperature (T2) which lies above T0, and being cooled off subsequently to below T0, yield maximum light extinction; and, upon being heated in the state of maximum light extinction to a temperature (T1) which lies above T0 and below T2, and subsequent cooling off to below T0, yields light extinctions which become smaller with increasing temperature; and, upon being heated to a temperature between T1 and T2 and subsequent cooling off to below T0, yields minimum light extinction. Such bodies - in film form or in the form of coatings, for example - can be employed as erasable microfilms and other erasable record carriers.
346304
Dabisch Wolfgang
Kuhn Peter
Muller Siegfried R.
Narayanan Krishnamoorthy
Etip Erasable Thermographic Imaging Products Gmbh
Ridout & Maybee Llp
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