Orienting magnetically-orientable flakes
AssigneeViavi Solutions Inc.
InventorVladimir RAKSHA
Life of this patent
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Abstract
According to examples, a substrate may be moved through a magnetic field, in which the substrate includes a fluid carrier containing magnetically-orientable flakes. The magnetic field may influence the magnetically-orientable flakes to be respectively oriented in one of multiple orientations. In addition, during movement of the substrate through the magnetic field, radiation may be applied onto a plurality of selected portions of the fluid carrier through at least one opening in a mask to cure the fluid carrier at the plurality of selected portions and fix the magnetically-orientable flakes in the plurality of selected portions at the respective angular orientations as influenced by the magnetic field.
Claims20
A method comprising:
- moving a substrate through a magnetic field, wherein the substrate includes a fluid carrier containing magnetically-orientable flakes, wherein the magnetic field influences the magnetically-orientable flakes to be respectively oriented in one of multiple orientations;
- and
- during movement of the substrate through the magnetic field, applying radiation onto a plurality of selected portions of the fluid carrier through at least one opening in a mask to cure the fluid carrier at the plurality of selected portions and fix the magnetically-orientable flakes in the plurality of selected portions at the respective angular orientations as influenced by the magnetic field.
A method comprising:
- moving a substrate in a first direction through a magnetic field and a radiation source providing radiation, the magnetic field having a strength of at least 0.001 tesla, wherein ink with magnetically-orientable flakes is disposed on the substrate and the mask has a leading edge;
- and
- during movement of the substrate through the magnetic field, providing radiation to a portion of the substrate when the portion of the substrate is in the first direction of the leading edge.
A method comprising:
- moving a substrate with a fluid carrier deposited thereon relative to an external magnetic induction and a radiation footprint to provide curing radiation, the ink comprising magnetically-orientable flakes, the radiation footprint having a leading edge with non-zero extent in the direction of substrate motion;
- and
- curing the fluid carrier with the curing radiation as the fluid carrier is moving in the radiation footprint;
- wherein for at least part of the leading edge, the external magnetic induction has an orthogonal projection onto a plane, the plane normal to the substrate and containing a substrate velocity vector, the orthogonal projection varying in direction by at least 0.01 radians and having a strength of at least 0.001 tesla.
Dependencies are inferred from the claim text.