Back to results
US 2003/0146195 A1Published application
Particle production
OwnerMichael Clearyinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerMichael Clearyinventor
Estimating the term…
A method of producing batches of micro particles, comprises: e) affixing a substrate sheet to a support f) cutting the substrate sheet by means of a laser device to define a plurality of micro particles; g) either before, after or during the cutting the substrate sheet, marking the region of the substrate sheet defining each micro particle by means of a laser device with a code or other identifying marking, said code or other identifying marking being unique to that particular batch of micro particles to uniquely identify that batch; and h) removing the micro particles from the support by means of a solvent. Preferably a single laser device is used for cutting the substrate sheet and marking the micro particles. Alternatively, separate laser devices may be used for respectively cutting the substrate sheet and marking the micro particles.
A method of producing batches of micro particles, comprising:
A method as claimed in any preceding claim wherein said code or other identifying marking is discernible by means of a contrast or colour, reflectance or light transmission.
A method according to any preceding claim, wherein the substrate comprises a plastic material having a metal layer thereon, preferably formed by vacuum deposition, said code is formed by evaporation of the metal layer by means of the laser device to define a pattern or discernible code on each micro particle.
A method according to any preceding claim, wherein the substrate sheet is affixed to the support by means of a suitable adhesive.
A method according to any preceding claim, wherein the support comprises a flat sheet of inert material.
A method according to any preceding claim, wherein the micro particles are removed from the support by the use of a suitable solvent.
A method according to any preceding claim, including the further step of suspending the micro particles in a suitable medium to allow the micro particles to be painted or sprayed onto goods to be marked.
Dependencies are inferred from the claim text.